lttng ui: Fix minor sonar warnings
[deliverable/tracecompass.git] / org.eclipse.linuxtools.lttng2.ui / src / org / eclipse / linuxtools / internal / lttng2 / ui / views / control / service / LTTngControlService.java
index ef08cae9d85be0207c87d179fd96042757209276..d660dcfdbbff742c2168f9c317bed84cbf8a9840 100644 (file)
@@ -1,13 +1,14 @@
 /**********************************************************************
- * Copyright (c) 2012 Ericsson
- * 
+ * Copyright (c) 2012, 2013 Ericsson
+ *
  * All rights reserved. This program and the accompanying materials are
  * made available under the terms of the Eclipse Public License v1.0 which
  * accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
- * 
- * Contributors: 
+ *
+ * Contributors:
  *   Bernd Hufmann - Initial API and implementation
+ *   Bernd Hufmann - Updated for support of LTTng Tools 2.1
  **********************************************************************/
 package org.eclipse.linuxtools.internal.lttng2.ui.views.control.service;
 
@@ -15,283 +16,56 @@ import java.util.ArrayList;
 import java.util.Iterator;
 import java.util.List;
 import java.util.regex.Matcher;
-import java.util.regex.Pattern;
 
 import org.eclipse.core.commands.ExecutionException;
 import org.eclipse.core.runtime.IProgressMonitor;
 import org.eclipse.core.runtime.NullProgressMonitor;
-import org.eclipse.linuxtools.internal.lttng2.ui.views.control.Messages;
-import org.eclipse.linuxtools.internal.lttng2.ui.views.control.model.IBaseEventInfo;
-import org.eclipse.linuxtools.internal.lttng2.ui.views.control.model.IChannelInfo;
-import org.eclipse.linuxtools.internal.lttng2.ui.views.control.model.IDomainInfo;
-import org.eclipse.linuxtools.internal.lttng2.ui.views.control.model.IEventInfo;
-import org.eclipse.linuxtools.internal.lttng2.ui.views.control.model.IProbeEventInfo;
-import org.eclipse.linuxtools.internal.lttng2.ui.views.control.model.ISessionInfo;
-import org.eclipse.linuxtools.internal.lttng2.ui.views.control.model.IUstProviderInfo;
-import org.eclipse.linuxtools.internal.lttng2.ui.views.control.model.LogLevelType;
-import org.eclipse.linuxtools.internal.lttng2.ui.views.control.model.TraceEventType;
-import org.eclipse.linuxtools.internal.lttng2.ui.views.control.model.TraceLogLevel;
-import org.eclipse.linuxtools.internal.lttng2.ui.views.control.model.impl.BaseEventInfo;
-import org.eclipse.linuxtools.internal.lttng2.ui.views.control.model.impl.ChannelInfo;
-import org.eclipse.linuxtools.internal.lttng2.ui.views.control.model.impl.DomainInfo;
-import org.eclipse.linuxtools.internal.lttng2.ui.views.control.model.impl.EventInfo;
-import org.eclipse.linuxtools.internal.lttng2.ui.views.control.model.impl.ProbeEventInfo;
-import org.eclipse.linuxtools.internal.lttng2.ui.views.control.model.impl.SessionInfo;
-import org.eclipse.linuxtools.internal.lttng2.ui.views.control.model.impl.UstProviderInfo;
+import org.eclipse.linuxtools.internal.lttng2.core.control.model.IBaseEventInfo;
+import org.eclipse.linuxtools.internal.lttng2.core.control.model.IChannelInfo;
+import org.eclipse.linuxtools.internal.lttng2.core.control.model.IDomainInfo;
+import org.eclipse.linuxtools.internal.lttng2.core.control.model.IEventInfo;
+import org.eclipse.linuxtools.internal.lttng2.core.control.model.IFieldInfo;
+import org.eclipse.linuxtools.internal.lttng2.core.control.model.IProbeEventInfo;
+import org.eclipse.linuxtools.internal.lttng2.core.control.model.ISessionInfo;
+import org.eclipse.linuxtools.internal.lttng2.core.control.model.IUstProviderInfo;
+import org.eclipse.linuxtools.internal.lttng2.core.control.model.LogLevelType;
+import org.eclipse.linuxtools.internal.lttng2.core.control.model.TraceEventType;
+import org.eclipse.linuxtools.internal.lttng2.core.control.model.TraceLogLevel;
+import org.eclipse.linuxtools.internal.lttng2.core.control.model.impl.BaseEventInfo;
+import org.eclipse.linuxtools.internal.lttng2.core.control.model.impl.ChannelInfo;
+import org.eclipse.linuxtools.internal.lttng2.core.control.model.impl.DomainInfo;
+import org.eclipse.linuxtools.internal.lttng2.core.control.model.impl.EventInfo;
+import org.eclipse.linuxtools.internal.lttng2.core.control.model.impl.FieldInfo;
+import org.eclipse.linuxtools.internal.lttng2.core.control.model.impl.ProbeEventInfo;
+import org.eclipse.linuxtools.internal.lttng2.core.control.model.impl.SessionInfo;
+import org.eclipse.linuxtools.internal.lttng2.core.control.model.impl.UstProviderInfo;
+import org.eclipse.linuxtools.internal.lttng2.ui.views.control.logging.ControlCommandLogger;
+import org.eclipse.linuxtools.internal.lttng2.ui.views.control.messages.Messages;
+import org.eclipse.linuxtools.internal.lttng2.ui.views.control.preferences.ControlPreferences;
+import org.eclipse.linuxtools.internal.lttng2.ui.views.control.remote.ICommandResult;
+import org.eclipse.linuxtools.internal.lttng2.ui.views.control.remote.ICommandShell;
 
 /**
- * <b><u>LTTngControlService</u></b>
  * <p>
  * Service for sending LTTng trace control commands to remote host.
  * </p>
+ *
+ * @author Bernd Hufmann
  */
 public class LTTngControlService implements ILttngControlService {
-    // ------------------------------------------------------------------------
-    // Constants
-    // ------------------------------------------------------------------------
-    // Command constants
-    /**
-     * The lttng tools command.
-     */
-    private final static String CONTROL_COMMAND = "lttng"; //$NON-NLS-1$
-    /**
-     * Command: lttng list.
-     */
-    private final static String COMMAND_LIST = CONTROL_COMMAND + " list "; //$NON-NLS-1$
-    /**
-     * Command to list kernel tracer information.
-     */
-    private final static String COMMAND_LIST_KERNEL = COMMAND_LIST + "-k"; //$NON-NLS-1$
-    /**
-     * Command to list user space trace information.
-     */
-    private final static String COMMAND_LIST_UST = COMMAND_LIST + "-u";  //$NON-NLS-1$
-    /**
-     * Command to create a session. 
-     */
-    private final static String COMMAND_CREATE_SESSION = CONTROL_COMMAND + " create "; //$NON-NLS-1$
-    /**
-     * Command to destroy a session. 
-     */
-    private final static String COMMAND_DESTROY_SESSION = CONTROL_COMMAND + " destroy "; //$NON-NLS-1$
-    /**
-     * Command to destroy a session. 
-     */
-    private final static String COMMAND_START_SESSION = CONTROL_COMMAND + " start "; //$NON-NLS-1$
-    /**
-     * Command to destroy a session. 
-     */
-    private final static String COMMAND_STOP_SESSION = CONTROL_COMMAND + " stop "; //$NON-NLS-1$
-    /**
-     * Command to enable a channel. 
-     */
-    private final static String COMMAND_ENABLE_CHANNEL = CONTROL_COMMAND + " enable-channel "; //$NON-NLS-1$
-    /**
-     * Command to disable a channel. 
-     */
-    private final static String COMMAND_DISABLE_CHANNEL = CONTROL_COMMAND + " disable-channel "; //$NON-NLS-1$
-    /**
-     * Command to enable a event. 
-     */
-    private final static String COMMAND_ENABLE_EVENT = CONTROL_COMMAND + " enable-event "; //$NON-NLS-1$
-    /**
-     * Command to disable a event. 
-     */
-    private final static String COMMAND_DISABLE_EVENT = CONTROL_COMMAND + " disable-event "; //$NON-NLS-1$
 
-    // Command options constants 
-    /**
-     * Command line option for output path.
-     */
-    private final static String OPTION_OUTPUT_PATH = " -o "; //$NON-NLS-1$
-    /**
-     * Command line option for kernel tracer.
-     */
-    private final static String OPTION_KERNEL = " -k "; //$NON-NLS-1$
-    /**
-     * Command line option for UST tracer.
-     */
-    private final static String OPTION_UST = " -u "; //$NON-NLS-1$
-    /**
-     * Command line option for specifying a session.
-     */
-    private final static String OPTION_SESSION = " -s ";  //$NON-NLS-1$
-    /**
-     * Command line option for specifying a channel.
-     */
-    private final static String OPTION_CHANNEL = " -c ";  //$NON-NLS-1$
-    /**
-     * Command line option for specifying all events.
-     */
-    private final static String OPTION_ALL = " -a ";  //$NON-NLS-1$
-    /**
-     * Command line option for specifying tracepoint events.
-     */
-    private final static String OPTION_TRACEPOINT = " --tracepoint ";  //$NON-NLS-1$
-    /**
-     * Command line option for specifying syscall events.
-     */
-    private final static String OPTION_SYSCALL = " --syscall ";  //$NON-NLS-1$
-    /**
-     * Command line option for specifying a dynamic probe.
-     */
-    private final static String OPTION_PROBE = " --probe ";  //$NON-NLS-1$
-    /**
-     * Command line option for specifying a dynamic function entry/return probe.
-     */
-    private final static String OPTION_FUNCTION_PROBE = " --function ";  //$NON-NLS-1$
-    /**
-     * Command line option for specifying a log level range.
-     */
-    private final static String OPTION_LOGLEVEL = " --loglevel ";  //$NON-NLS-1$
-    /**
-     * Command line option for specifying a specific log level.
-     */
-    private final static String OPTION_LOGLEVEL_ONLY = " --loglevel-only ";  //$NON-NLS-1$
-    /**
-     * Optional command line option for configuring a channel's overwrite mode.
-     */
-    private final static String OPTION_OVERWRITE = " --overwrite ";  //$NON-NLS-1$ 
-    /**
-     * Optional command line option for configuring a channel's number of sub buffers.
-     */
-    private final static String OPTION_NUM_SUB_BUFFERS = " --num-subbuf ";  //$NON-NLS-1$
-    /**
-     * Optional command line option for configuring a channel's sub buffer size.
-     */
-    private final static String OPTION_SUB_BUFFER_SIZE = " --subbuf-size ";  //$NON-NLS-1$
-    /**
-     * Optional command line option for configuring a channel's switch timer interval.
-     */
-    private final static String OPTION_SWITCH_TIMER = " --switch-timer ";  //$NON-NLS-1$
-    /**
-     * Optional command line option for configuring a channel's read timer interval.
-     */
-    private final static String OPTION_READ_TIMER = " --read-timer ";  //$NON-NLS-1$
-    
-    // Parsing constants
-    /**
-     * Pattern to match for error output
-     */
-    private final static Pattern ERROR_PATTERN = Pattern.compile("\\s*Error\\:.*"); //$NON-NLS-1$
-    /**
-     * Pattern to match for session information (lttng list)
-     */
-    private final static Pattern SESSION_PATTERN = Pattern.compile("\\s+(\\d+)\\)\\s+(.*)\\s+\\((.*)\\)\\s+\\[(active|inactive)\\].*"); //$NON-NLS-1$
-    /**
-     * Pattern to match for session information (lttng list <session>)
-     */
-    private final static Pattern TRACE_SESSION_PATTERN = Pattern.compile("\\s*Tracing\\s+session\\s+(.*)\\:\\s+\\[(active|inactive)\\].*"); //$NON-NLS-1$
-    /**
-     * Pattern to match for session path information (lttng list <session>)
-     */
-    private final static Pattern TRACE_SESSION_PATH_PATTERN = Pattern.compile("\\s*Trace\\s+path\\:\\s+(.*)"); //$NON-NLS-1$
-    /**
-     * Pattern to match for kernel domain information (lttng list <session>)
-     */
-    private final static Pattern DOMAIN_KERNEL_PATTERN = Pattern.compile("=== Domain: Kernel ==="); //$NON-NLS-1$
-    /**
-     * Pattern to match for ust domain information (lttng list <session>)
-     */
-    private final static Pattern DOMAIN_UST_GLOBAL_PATTERN = Pattern.compile("=== Domain: UST global ==="); //$NON-NLS-1$
-    /**
-     * Pattern to match for channels section (lttng list <session>)
-     */
-    private final static Pattern CHANNELS_SECTION_PATTERN = Pattern.compile("\\s*Channels\\:"); //$NON-NLS-1$
-    /**
-     * Pattern to match for channel information (lttng list <session>)
-     */
-    private final static Pattern CHANNEL_PATTERN = Pattern.compile("\\s*-\\s+(.*)\\:\\s+\\[(enabled|disabled)\\]"); //$NON-NLS-1$
-    /**
-     * Pattern to match for events section information (lttng list <session>)
-     */
-    private final static Pattern EVENT_SECTION_PATTERN = Pattern.compile("\\s*Events\\:"); //$NON-NLS-1$
-    /**
-     * Pattern to match for event information (no enabled events) (lttng list <session>)
-     */
-    //    private final static String EVENT_NONE_PATTERN = "\\s+None"; //$NON-NLS-1$
-    /**
-     * Pattern to match for event information (lttng list <session>)
-     */
-    private final static Pattern EVENT_PATTERN = Pattern.compile("\\s+(.*)\\s+\\(loglevel:\\s+(.*)\\s+\\(\\d*\\)\\)\\s+\\(type:\\s+(.*)\\)\\s+\\[(enabled|disabled)\\].*"); //$NON-NLS-1$
-    /**
-     * Pattern to match a wildcarded event information (lttng list <session>)
-     */
-    private final static Pattern WILDCARD_EVENT_PATTERN = Pattern.compile("\\s+(.*)\\s+\\(type:\\s+(.*)\\)\\s+\\[(enabled|disabled)\\].*"); //$NON-NLS-1$
-    /**
-     * Pattern to match a probe address information (lttng list <session>)
-     */
-    private final static Pattern PROBE_ADDRESS_PATTERN = Pattern.compile("\\s+(addr)\\:\\s+(0x[0-9a-fA-F]{1,8})"); //$NON-NLS-1$
-    /**
-     * Pattern to match a probe OFFSET information (lttng list <session>)
-     */
-    private final static Pattern PROBE_OFFSET_PATTERN = Pattern.compile("\\s+(offset)\\:\\s+(0x[0-9a-fA-F]{1,8})"); //$NON-NLS-1$
-    /**
-     * Pattern to match a probe SYMBOL information (lttng list <session>)
-     */
-    private final static Pattern PROBE_SYMBOL_PATTERN = Pattern.compile("\\s+(symbol)\\:\\s+(.+)"); //$NON-NLS-1$
-    /**
-     * Pattern to match for channel (overwite mode) information (lttng list
-     * <session>)
-     */
-    private final static Pattern OVERWRITE_MODE_ATTRIBUTE = Pattern.compile("\\s+overwrite\\s+mode\\:.*"); //$NON-NLS-1$
-    /**
-     * Pattern to match indicating false for overwrite mode
-     */
-    private final static String OVERWRITE_MODE_ATTRIBUTE_FALSE = "0"; //$NON-NLS-1$
-    /**
-     * Pattern to match for channel (sub-buffer size) information (lttng list
-     * <session>)
-     */
-    private final static Pattern SUBBUFFER_SIZE_ATTRIBUTE = Pattern.compile("\\s+subbufers\\s+size\\:.*"); //$NON-NLS-1$
-    /**
-     * Pattern to match for channel (number of sub-buffers) information (lttng
-     * list <session>)
-     */
-    private final static Pattern NUM_SUBBUFFERS_ATTRIBUTE = Pattern.compile("\\s+number\\s+of\\s+subbufers\\:.*"); //$NON-NLS-1$
-    /**
-     * Pattern to match for channel (switch timer) information (lttng list
-     * <session>)
-     */
-    private final static Pattern SWITCH_TIMER_ATTRIBUTE = Pattern.compile("\\s+switch\\s+timer\\s+interval\\:.*"); //$NON-NLS-1$
-    /**
-     * Pattern to match for channel (read timer) information (lttng list
-     * <session>)
-     */
-    private final static Pattern READ_TIMER_ATTRIBUTE = Pattern.compile("\\s+read\\s+timer\\s+interval\\:.*"); //$NON-NLS-1$
-    /**
-     * Pattern to match for channel (output type) information (lttng list
-     * <session>)
-     */
-    private final static Pattern OUTPUT_ATTRIBUTE = Pattern.compile("\\s+output\\:.*"); //$NON-NLS-1$
-    /**
-     * Pattern to match for provider information (lttng list -k/-u)
-     */
-    private final static Pattern PROVIDER_EVENT_PATTERN = Pattern.compile("\\s*(.*)\\s+\\(loglevel:\\s+(.*)\\s+\\(\\d*\\)\\)\\s+\\(type:\\s+(.*)\\)"); //$NON-NLS-1$
-    /**
-     * Pattern to match for UST provider information (lttng list -u)
-     */
-    private final static Pattern UST_PROVIDER_PATTERN = Pattern.compile("\\s*PID\\:\\s+(\\d+)\\s+-\\s+Name\\:\\s+(.*)"); //$NON-NLS-1$
-    /**
-     * Pattern to match for session information (lttng create <session name>)
-     */
-    private final static Pattern CREATE_SESSION_NAME_PATTERN = Pattern.compile("\\s*Session\\s+(.*)\\s+created\\."); //$NON-NLS-1$
-    /**
-     * Pattern to match for session path information (lttng create <session name>)
-     */
-    private final static Pattern CREATE_SESSION_PATH_PATTERN = Pattern.compile("\\s*Traces\\s+will\\s+be\\s+written\\s+in\\s+(.*).*"); //$NON-NLS-1$
-    /**
-     * Pattern to match for session command output for "session name not found".
-     */
-    private final static Pattern SESSION_NOT_FOUND_ERROR_PATTERN = Pattern.compile("\\s*Error:\\s+Session\\s+name\\s+not\\s+found"); //$NON-NLS-1$
-    
     // ------------------------------------------------------------------------
     // Attributes
     // ------------------------------------------------------------------------
     /**
      * The command shell implementation
      */
-    private ICommandShell fCommandShell = null;
+    private final ICommandShell fCommandShell;
+
+    /**
+     * The version string.
+     */
+    private LttngVersion fVersion = null;
 
     // ------------------------------------------------------------------------
     // Constructors
@@ -299,7 +73,7 @@ public class LTTngControlService implements ILttngControlService {
 
     /**
      * Constructor
-     * 
+     *
      * @param shell
      *            - the command shell implementation to use
      */
@@ -308,32 +82,54 @@ public class LTTngControlService implements ILttngControlService {
     }
 
     // ------------------------------------------------------------------------
-    // Operations
+    // Accessors
     // ------------------------------------------------------------------------
 
-    /*
-     * (non-Javadoc)
-     * 
-     * @see
-     * org.eclipse.linuxtools.internal.lttng2.ui.views.control.service.ILttngControlService
-     * #getSessionNames(org.eclipse.core.runtime.IProgressMonitor)
+    @Override
+    public String getVersion() {
+        if (fVersion == null) {
+            return "Unknown"; //$NON-NLS-1$
+        }
+        return fVersion.toString();
+    }
+
+    /**
+     * Sets the version of the LTTng 2.0 control service.
+     * @param version - a version to set
      */
+    public void setVersion(String version) {
+        fVersion = new LttngVersion(version);
+    }
+
     @Override
-    public String[] getSessionNames(IProgressMonitor monitor) throws ExecutionException {
+    public boolean isVersionSupported(String version) {
+        LttngVersion tmp = new LttngVersion(version);
+        return (fVersion != null && fVersion.compareTo(tmp) >= 0) ? true : false;
+    }
 
-        String command = COMMAND_LIST;
-        ICommandResult result = fCommandShell.executeCommand(command, monitor);
+    /**
+     * Returns the command shell implementation.
+     *
+     * @return the command shell implementation
+     */
+    protected ICommandShell getCommandShell() {
+        return fCommandShell;
+    }
 
-        if (isError(result)) {
-            throw new ExecutionException(Messages.TraceControl_CommandError + " " + command + "\n" + formatOutput(result.getOutput())); //$NON-NLS-1$ //$NON-NLS-2$
-        }
+    // ------------------------------------------------------------------------
+    // Operations
+    // ------------------------------------------------------------------------
+
+    @Override
+    public String[] getSessionNames(IProgressMonitor monitor) throws ExecutionException {
+        StringBuffer command = createCommand(LTTngControlServiceConstants.COMMAND_LIST);
+
+        ICommandResult result = executeCommand(command.toString(), monitor);
 
         // Output:
         // Available tracing sessions:
-        // 1) mysession1 (/home/user/lttng-traces/mysession1-20120123-083928)
-        // [inactive]
-        // 2) mysession (/home/user/lttng-traces/mysession-20120123-083318)
-        // [inactive]
+        // 1) mysession1 (/home/user/lttng-traces/mysession1-20120123-083928) [inactive]
+        // 2) mysession (/home/user/lttng-traces/mysession-20120123-083318) [inactive]
         //
         // Use lttng list <session_name> for more details
 
@@ -341,7 +137,7 @@ public class LTTngControlService implements ILttngControlService {
         int index = 0;
         while (index < result.getOutput().length) {
             String line = result.getOutput()[index];
-            Matcher matcher = SESSION_PATTERN.matcher(line);
+            Matcher matcher = LTTngControlServiceConstants.SESSION_PATTERN.matcher(line);
             if (matcher.matches()) {
                 retArray.add(matcher.group(2).trim());
             }
@@ -350,22 +146,10 @@ public class LTTngControlService implements ILttngControlService {
         return retArray.toArray(new String[retArray.size()]);
     }
 
-    /*
-     * (non-Javadoc)
-     * 
-     * @see
-     * org.eclipse.linuxtools.internal.lttng2.ui.views.control.service.ILttngControlService
-     * #getSession(java.lang.String, org.eclipse.core.runtime.IProgressMonitor)
-     */
     @Override
     public ISessionInfo getSession(String sessionName, IProgressMonitor monitor) throws ExecutionException {
-        
-        String command = COMMAND_LIST + sessionName;
-        ICommandResult result = fCommandShell.executeCommand(command, monitor);
-
-        if (isError(result)) {
-            throw new ExecutionException(Messages.TraceControl_CommandError + " " + command + "\n" + formatOutput(result.getOutput())); //$NON-NLS-1$ //$NON-NLS-2$
-        }
+        StringBuffer command = createCommand(LTTngControlServiceConstants.COMMAND_LIST, sessionName);
+        ICommandResult result = executeCommand(command.toString(), monitor);
 
         int index = 0;
 
@@ -381,52 +165,65 @@ public class LTTngControlService implements ILttngControlService {
             // === Domain: Kernel ===
             //
             String line = result.getOutput()[index];
-            Matcher matcher = TRACE_SESSION_PATTERN.matcher(line);
+            Matcher matcher = LTTngControlServiceConstants.TRACE_SESSION_PATTERN.matcher(line);
             if (matcher.matches()) {
                 sessionInfo.setSessionState(matcher.group(2));
                 index++;
                 continue;
             }
 
-            matcher = TRACE_SESSION_PATH_PATTERN.matcher(line);
+            matcher = LTTngControlServiceConstants.TRACE_NETWORK_PATH_PATTERN.matcher(line);
+            if (matcher.matches()) {
+                sessionInfo.setStreamedTrace(true);
+            }
+
+            matcher = LTTngControlServiceConstants.TRACE_SESSION_PATH_PATTERN.matcher(line);
             if (matcher.matches()) {
                 sessionInfo.setSessionPath(matcher.group(1).trim());
                 index++;
                 continue;
             }
 
-            matcher = DOMAIN_KERNEL_PATTERN.matcher(line);
+            matcher = LTTngControlServiceConstants.DOMAIN_KERNEL_PATTERN.matcher(line);
             if (matcher.matches()) {
                 // Create Domain
                 IDomainInfo domainInfo = new DomainInfo(Messages.TraceControl_KernelDomainDisplayName);
-                sessionInfo.addDomain(domainInfo);
 
                 // in domain kernel
                 ArrayList<IChannelInfo> channels = new ArrayList<IChannelInfo>();
                 index = parseDomain(result.getOutput(), index, channels);
 
-                // set channels
-                domainInfo.setChannels(channels);
-                
-                // set kernel flag
-                domainInfo.setIsKernel(true);
+                if (channels.size() > 0) {
+                    // add domain
+                    sessionInfo.addDomain(domainInfo);
+
+                    // set channels
+                    domainInfo.setChannels(channels);
+
+                    // set kernel flag
+                    domainInfo.setIsKernel(true);
+                }
                 continue;
             }
 
-            matcher = DOMAIN_UST_GLOBAL_PATTERN.matcher(line);
+            matcher = LTTngControlServiceConstants.DOMAIN_UST_GLOBAL_PATTERN.matcher(line);
             if (matcher.matches()) {
                 IDomainInfo domainInfo = new DomainInfo(Messages.TraceControl_UstGlobalDomainDisplayName);
-                sessionInfo.addDomain(domainInfo);
 
                 // in domain UST
                 ArrayList<IChannelInfo> channels = new ArrayList<IChannelInfo>();
                 index = parseDomain(result.getOutput(), index, channels);
 
-                // set channels
-                domainInfo.setChannels(channels);
-                
-                // set kernel flag
-                domainInfo.setIsKernel(false);
+                if (channels.size() > 0) {
+                    // add domain
+                    sessionInfo.addDomain(domainInfo);
+
+                    // set channels
+                    domainInfo.setChannels(channels);
+
+                    // set kernel flag
+                    domainInfo.setIsKernel(false);
+                }
                 continue;
             }
             index++;
@@ -434,57 +231,88 @@ public class LTTngControlService implements ILttngControlService {
         return sessionInfo;
     }
 
-    /*
-     * (non-Javadoc)
-     * 
-     * @see
-     * org.eclipse.linuxtools.internal.lttng2.ui.views.control.service.ILttngControlService
-     * #getKernelProvider(org.eclipse.core.runtime.IProgressMonitor)
-     */
     @Override
     public List<IBaseEventInfo> getKernelProvider(IProgressMonitor monitor) throws ExecutionException {
-        String command = COMMAND_LIST_KERNEL;
-        ICommandResult result = fCommandShell.executeCommand(command, monitor);
+        StringBuffer command = createCommand(LTTngControlServiceConstants.COMMAND_LIST_KERNEL);
+        ICommandResult result = executeCommand(command.toString(), monitor, false);
+
+        List<IBaseEventInfo> events = new ArrayList<IBaseEventInfo>();
+
+        if (result.getOutput() != null) {
+            // Ignore the following 2 cases:
+            // Spawning a session daemon
+            // Error: Unable to list kernel events
+            // or:
+            // Error: Unable to list kernel events
+            //
+            int index = 0;
+            while (index < result.getOutput().length) {
+                String line = result.getOutput()[index];
+                Matcher matcher = LTTngControlServiceConstants.LIST_KERNEL_NO_KERNEL_PROVIDER_PATTERN.matcher(line);
+                if (matcher.matches()) {
+                    return events;
+                }
+                index++;
+            }
+        }
+
         if (isError(result)) {
-            throw new ExecutionException(Messages.TraceControl_CommandError + " " + command + "\n" + formatOutput(result.getOutput())); //$NON-NLS-1$ //$NON-NLS-2$
+            throw new ExecutionException(Messages.TraceControl_CommandError + " " + command.toString() + "\n" + formatOutput(result)); //$NON-NLS-1$ //$NON-NLS-2$
         }
 
         // Kernel events:
         // -------------
         // sched_kthread_stop (type: tracepoint)
-        List<IBaseEventInfo> events = new ArrayList<IBaseEventInfo>();
         getProviderEventInfo(result.getOutput(), 0, events);
         return events;
     }
 
-    /*
-     * (non-Javadoc)
-     * 
-     * @see
-     * org.eclipse.linuxtools.internal.lttng2.ui.views.control.service.ILttngControlService
-     * #getUstProvider()
-     */
     @Override
     public List<IUstProviderInfo> getUstProvider() throws ExecutionException {
         return getUstProvider(new NullProgressMonitor());
     }
 
-    /*
-     * (non-Javadoc)
-     * 
-     * @see
-     * org.eclipse.linuxtools.internal.lttng2.ui.views.control.service.ILttngControlService
-     * #getUstProvider(org.eclipse.core.runtime.IProgressMonitor)
-     */
     @Override
     public List<IUstProviderInfo> getUstProvider(IProgressMonitor monitor) throws ExecutionException {
-        String command = COMMAND_LIST_UST;
-        ICommandResult result = fCommandShell.executeCommand(command, monitor);
+        StringBuffer command = createCommand(LTTngControlServiceConstants.COMMAND_LIST_UST);
+
+        if (isVersionSupported("2.1.0")) { //$NON-NLS-1$
+            command.append(LTTngControlServiceConstants.OPTION_FIELDS);
+        }
+
+        ICommandResult result = executeCommand(command.toString(), monitor, false);
+        List<IUstProviderInfo> allProviders = new ArrayList<IUstProviderInfo>();
+
+        // Workaround for versions 2.0.x which causes a segmentation fault for this command
+        // if LTTng Tools is compiled without UST support.
+        if (!isVersionSupported("2.1.0") && (result.getResult() != 0)) { //$NON-NLS-1$
+            return allProviders;
+        }
+
+        if (result.getOutput() != null) {
+            // Ignore the following 2 cases:
+            // Spawning a session daemon
+            // Error: Unable to list UST events: Listing UST events failed
+            // or:
+            // Error: Unable to list UST events: Listing UST events failed
+            //
+            int index = 0;
+            while (index < result.getOutput().length) {
+                String line = result.getOutput()[index];
+                Matcher matcher = LTTngControlServiceConstants.LIST_UST_NO_UST_PROVIDER_PATTERN.matcher(line);
+                if (matcher.matches()) {
+                    return allProviders;
+                }
+                index++;
+            }
+        }
 
         if (isError(result)) {
-            throw new ExecutionException(Messages.TraceControl_CommandError + " " + command + "\n" + formatOutput(result.getOutput())); //$NON-NLS-1$ //$NON-NLS-2$
+            throw new ExecutionException(Messages.TraceControl_CommandError + " " + command.toString() + "\n" + formatOutput(result)); //$NON-NLS-1$ //$NON-NLS-2$
         }
 
+        // Note that field print-outs exists for version >= 2.1.0
+        //
         // UST events:
         // -------------
         //
@@ -493,164 +321,223 @@ public class LTTngControlService implements ILttngControlService {
         // ust_tests_hello:tptest_sighandler (loglevel: TRACE_EMERG0) (type:
         // tracepoint)
         // ust_tests_hello:tptest (loglevel: TRACE_EMERG0) (type: tracepoint)
+        //    field: doublefield (float)
+        //    field: floatfield (float)
+        //    field: stringfield (string)
         //
         // PID: 6459 - Name:
         // /home/user/git/lttng-ust/tests/hello.cxx/.libs/lt-hello
         // ust_tests_hello:tptest_sighandler (loglevel: TRACE_EMERG0) (type:
         // tracepoint)
         // ust_tests_hello:tptest (loglevel: TRACE_EMERG0) (type: tracepoint)
+        //    field: doublefield (float)
+        //    field: floatfield (float)
+        //    field: stringfield (string)
 
-        List<IUstProviderInfo> allProviders = new ArrayList<IUstProviderInfo>();
         IUstProviderInfo provider = null;
 
         int index = 0;
         while (index < result.getOutput().length) {
             String line = result.getOutput()[index];
-            Matcher matcher = UST_PROVIDER_PATTERN.matcher(line);
+            Matcher matcher = LTTngControlServiceConstants.UST_PROVIDER_PATTERN.matcher(line);
             if (matcher.matches()) {
-
                 provider = new UstProviderInfo(matcher.group(2).trim());
                 provider.setPid(Integer.valueOf(matcher.group(1).trim()));
                 List<IBaseEventInfo> events = new ArrayList<IBaseEventInfo>();
                 index = getProviderEventInfo(result.getOutput(), ++index, events);
                 provider.setEvents(events);
                 allProviders.add(provider);
-
             } else {
                 index++;
             }
-
         }
         return allProviders;
     }
 
-    /*
-     * (non-Javadoc)
-     * @see org.eclipse.linuxtools.internal.lttng2.ui.views.control.service.ILttngControlService#createSession(java.lang.String, java.lang.String, org.eclipse.core.runtime.IProgressMonitor)
-     */
     @Override
     public ISessionInfo createSession(String sessionName, String sessionPath, IProgressMonitor monitor) throws ExecutionException {
 
         String newName = formatParameter(sessionName);
         String newPath = formatParameter(sessionPath);
 
-        StringBuffer command = new StringBuffer(); 
-        command.append(COMMAND_CREATE_SESSION);
-        command.append(newName);
+        StringBuffer command = createCommand(LTTngControlServiceConstants.COMMAND_CREATE_SESSION, newName);
 
         if (newPath != null && !"".equals(newPath)) { //$NON-NLS-1$
-            command.append(OPTION_OUTPUT_PATH);
+            command.append(LTTngControlServiceConstants.OPTION_OUTPUT_PATH);
             command.append(newPath);
         }
 
-        ICommandResult result = fCommandShell.executeCommand(command.toString(), monitor);
-        
-        if (isError(result)) {
-            throw new ExecutionException(Messages.TraceControl_CommandError + " " + command + "\n" + formatOutput(result.getOutput())); //$NON-NLS-1$ //$NON-NLS-2$
-        }
+        ICommandResult result = executeCommand(command.toString(), monitor);
+
         //Session myssession2 created.
         //Traces will be written in /home/user/lttng-traces/myssession2-20120209-095418
         String[] output = result.getOutput();
-        
-        // Get and verify session name
-        Matcher matcher = CREATE_SESSION_NAME_PATTERN.matcher(output[0]);
+
+        // Get and session name and path
         String name = null;
+        String path = null;
 
-        if (matcher.matches()) {
-            name = String.valueOf(matcher.group(1).trim());
-        } else {
-            // Output format not expected
-            throw new ExecutionException(Messages.TraceControl_CommandError + " " + command + "\n" + //$NON-NLS-1$ //$NON-NLS-2$ 
-                    Messages.TraceControl_UnexpectedCommnadOutputFormat + ":\n" + //$NON-NLS-1$ 
-                    formatOutput(result.getOutput())); 
+        int index = 0;
+        while (index < output.length) {
+            String line = output[index];
+            Matcher nameMatcher = LTTngControlServiceConstants.CREATE_SESSION_NAME_PATTERN.matcher(line);
+            Matcher pathMatcher = LTTngControlServiceConstants.CREATE_SESSION_PATH_PATTERN.matcher(line);
+            if (nameMatcher.matches()) {
+                name = String.valueOf(nameMatcher.group(1).trim());
+            } else if (pathMatcher.matches()) {
+                path = String.valueOf(pathMatcher.group(1).trim());
+            }
+            index++;
         }
 
-        if ((name == null) || (!name.equals(sessionName))) {
+        // Verify session name
+        if ((name == null) || (!"".equals(sessionName) && !name.equals(sessionName))) { //$NON-NLS-1$
             // Unexpected name returned
-            throw new ExecutionException(Messages.TraceControl_CommandError + " " + command + "\n" + //$NON-NLS-1$ //$NON-NLS-2$ 
-                    Messages.TraceControl_UnexpectedNameError + ": " + name); //$NON-NLS-1$ 
-        }
-        
-        // Get and verify session path
-        matcher = CREATE_SESSION_PATH_PATTERN.matcher(output[1]);
-        String path = null;
-        
-        if (matcher.matches()) {
-            path = String.valueOf(matcher.group(1).trim());
-        } else {
-            // Output format not expected
-            throw new ExecutionException(Messages.TraceControl_CommandError + " " + command + "\n" + //$NON-NLS-1$ //$NON-NLS-2$ 
-                    Messages.TraceControl_UnexpectedCommnadOutputFormat + ":\n" + //$NON-NLS-1$ 
-                    formatOutput(result.getOutput())); 
+            throw new ExecutionException(Messages.TraceControl_CommandError + " " + command + "\n" + //$NON-NLS-1$ //$NON-NLS-2$
+                    Messages.TraceControl_UnexpectedNameError + ": " + name); //$NON-NLS-1$
         }
 
+        SessionInfo sessionInfo = new SessionInfo(name);
+
+        // Verify session path
         if ((path == null) || ((sessionPath != null) && (!path.contains(sessionPath)))) {
             // Unexpected path
-            throw new ExecutionException(Messages.TraceControl_CommandError + " " + command + "\n" + //$NON-NLS-1$ //$NON-NLS-2$ 
+            throw new ExecutionException(Messages.TraceControl_CommandError + " " + command + "\n" + //$NON-NLS-1$ //$NON-NLS-2$
                     Messages.TraceControl_UnexpectedPathError + ": " + name); //$NON-NLS-1$
         }
-        
-        SessionInfo sessionInfo = new SessionInfo(name);
+
         sessionInfo.setSessionPath(path);
 
         return sessionInfo;
+
     }
-    
+
+    @Override
+    public ISessionInfo createSession(String sessionName, String networkUrl, String controlUrl, String dataUrl, IProgressMonitor monitor) throws ExecutionException {
+
+        String newName = formatParameter(sessionName);
+        StringBuffer command = createCommand(LTTngControlServiceConstants.COMMAND_CREATE_SESSION, newName);
+
+        if (networkUrl != null) {
+            command.append(LTTngControlServiceConstants.OPTION_NETWORK_URL);
+            command.append(networkUrl);
+        } else {
+            command.append(LTTngControlServiceConstants.OPTION_CONTROL_URL);
+            command.append(controlUrl);
+
+            command.append(LTTngControlServiceConstants.OPTION_DATA_URL);
+            command.append(dataUrl);
+        }
+
+        ICommandResult result = executeCommand(command.toString(), monitor);
+
+        // Verify output
+        String[] output = result.getOutput();
+
+        // Get and session name and path
+        String name = null;
+        String path = null;
+
+        int index = 0;
+        while (index < output.length) {
+            String line = output[index];
+            Matcher nameMatcher = LTTngControlServiceConstants.CREATE_SESSION_NAME_PATTERN.matcher(line);
+            Matcher pathMatcher = LTTngControlServiceConstants.CREATE_SESSION_PATH_PATTERN.matcher(line);
+
+            if (nameMatcher.matches()) {
+                name = String.valueOf(nameMatcher.group(1).trim());
+            } else if (pathMatcher.matches() && (networkUrl != null)) {
+                path = String.valueOf(pathMatcher.group(1).trim());
+            }
+            index++;
+        }
+
+        // Verify session name
+        if ((name == null) || (!"".equals(sessionName) && !name.equals(sessionName))) { //$NON-NLS-1$
+            // Unexpected name returned
+            throw new ExecutionException(Messages.TraceControl_CommandError + " " + command + "\n" + //$NON-NLS-1$ //$NON-NLS-2$
+                    Messages.TraceControl_UnexpectedNameError + ": " + name); //$NON-NLS-1$
+        }
+
+        SessionInfo sessionInfo = new SessionInfo(name);
+
+        sessionInfo.setStreamedTrace(true);
+
+        // Verify session path
+        if (networkUrl != null) {
+            if (path == null) {
+                // Unexpected path
+                throw new ExecutionException(Messages.TraceControl_CommandError + " " + command + "\n" + //$NON-NLS-1$ //$NON-NLS-2$
+                        Messages.TraceControl_UnexpectedPathError + ": " + name); //$NON-NLS-1$
+            }
+
+            sessionInfo.setSessionPath(path);
+
+            // Check file protocol
+            Matcher matcher = LTTngControlServiceConstants.TRACE_FILE_PROTOCOL_PATTERN.matcher(path);
+            if (matcher.matches()) {
+                sessionInfo.setStreamedTrace(false);
+            }
+        }
+        // When using controlUrl and dataUrl the full session path is not known yet
+        // and will be set later on when listing the session
+
+        return sessionInfo;
+    }
+
     @Override
     public void destroySession(String sessionName, IProgressMonitor monitor) throws ExecutionException {
         String newName = formatParameter(sessionName);
-        String command = COMMAND_DESTROY_SESSION + newName;
 
-        ICommandResult result = fCommandShell.executeCommand(command, monitor);
+        StringBuffer command = createCommand(LTTngControlServiceConstants.COMMAND_DESTROY_SESSION, newName);
+
+        ICommandResult result = executeCommand(command.toString(), monitor, false);
         String[] output = result.getOutput();
-        
-        if (isError(result) && ((output == null) || (!SESSION_NOT_FOUND_ERROR_PATTERN.matcher(output[0]).matches()))) {
-                throw new ExecutionException(Messages.TraceControl_CommandError + " " + command + "\n" + formatOutput(result.getOutput())); //$NON-NLS-1$ //$NON-NLS-2$
-       }
+
+        boolean isError = isError(result);
+        if (isError && (output != null)) {
+            int index = 0;
+            while (index < output.length) {
+                String line = output[index];
+                Matcher matcher = LTTngControlServiceConstants.SESSION_NOT_FOUND_ERROR_PATTERN.matcher(line);
+                if (matcher.matches()) {
+                    // Don't treat this as an error
+                    isError = false;
+                }
+                index++;
+            }
+        }
+
+        if (isError) {
+            throw new ExecutionException(Messages.TraceControl_CommandError + " " + command.toString() + "\n" + formatOutput(result)); //$NON-NLS-1$ //$NON-NLS-2$
+        }
+
         //Session <sessionName> destroyed
     }
-    
-    /*
-     * (non-Javadoc)
-     * @see org.eclipse.linuxtools.internal.lttng2.ui.views.control.service.ILttngControlService#startSession(java.lang.String, org.eclipse.core.runtime.IProgressMonitor)
-     */
+
     @Override
     public void startSession(String sessionName, IProgressMonitor monitor) throws ExecutionException {
 
         String newSessionName = formatParameter(sessionName);
 
-        String command = COMMAND_START_SESSION + newSessionName;
+        StringBuffer command = createCommand(LTTngControlServiceConstants.COMMAND_START_SESSION, newSessionName);
 
-        ICommandResult result = fCommandShell.executeCommand(command, monitor);
+        executeCommand(command.toString(), monitor);
 
-        if (isError(result)) {
-            throw new ExecutionException(Messages.TraceControl_CommandError + " " + command + "\n" + formatOutput(result.getOutput())); //$NON-NLS-1$ //$NON-NLS-2$
-        }
         //Session <sessionName> started
     }
 
-    /*
-     * (non-Javadoc)
-     * @see org.eclipse.linuxtools.internal.lttng2.ui.views.control.service.ILttngControlService#stopSession(java.lang.String, org.eclipse.core.runtime.IProgressMonitor)
-     */
     @Override
     public void stopSession(String sessionName, IProgressMonitor monitor) throws ExecutionException {
         String newSessionName = formatParameter(sessionName);
-        String command = COMMAND_STOP_SESSION + newSessionName;
+        StringBuffer command = createCommand(LTTngControlServiceConstants.COMMAND_STOP_SESSION, newSessionName);
 
-        ICommandResult result = fCommandShell.executeCommand(command, monitor);
+        executeCommand(command.toString(), monitor);
 
-        if (isError(result)) {
-            throw new ExecutionException(Messages.TraceControl_CommandError + " " + command + "\n" + formatOutput(result.getOutput())); //$NON-NLS-1$ //$NON-NLS-2$
-        }
         //Session <sessionName> stopped
-        
+
     }
-    
-    /*
-     * (non-Javadoc)
-     * @see org.eclipse.linuxtools.internal.lttng2.ui.views.control.service.ILttngControlService#enableChannel(java.lang.String, java.util.List, boolean, org.eclipse.linuxtools.internal.lttng2.ui.views.control.model.IChannelInfo, org.eclipse.core.runtime.IProgressMonitor)
-     */
+
     @Override
     public void enableChannels(String sessionName, List<String> channelNames, boolean isKernel, IChannelInfo info, IProgressMonitor monitor) throws ExecutionException {
 
@@ -659,12 +546,10 @@ public class LTTngControlService implements ILttngControlService {
             return;
         }
 
-        String newSessionName = formatParameter(sessionName);
-        
-        StringBuffer command = new StringBuffer(COMMAND_ENABLE_CHANNEL);
+        StringBuffer command = createCommand(LTTngControlServiceConstants.COMMAND_ENABLE_CHANNEL);
 
         for (Iterator<String> iterator = channelNames.iterator(); iterator.hasNext();) {
-            String channel = (String) iterator.next();
+            String channel = iterator.next();
             command.append(channel);
             if (iterator.hasNext()) {
                 command.append(',');
@@ -672,12 +557,13 @@ public class LTTngControlService implements ILttngControlService {
         }
 
         if (isKernel) {
-            command.append(OPTION_KERNEL);
+            command.append(LTTngControlServiceConstants.OPTION_KERNEL);
         } else {
-            command.append(OPTION_UST);
+            command.append(LTTngControlServiceConstants.OPTION_UST);
         }
 
-        command.append(OPTION_SESSION);
+        String newSessionName = formatParameter(sessionName);
+        command.append(LTTngControlServiceConstants.OPTION_SESSION);
         command.append(newSessionName);
 
         if (info != null) {
@@ -685,52 +571,43 @@ public class LTTngControlService implements ILttngControlService {
 
 //            --overwrite          Flight recorder mode
             if (info.isOverwriteMode()) {
-                command.append(OPTION_OVERWRITE);
+                command.append(LTTngControlServiceConstants.OPTION_OVERWRITE);
             }
 //            --subbuf-size SIZE   Subbuffer size in bytes
 //                                     (default: 4096, kernel default: 262144)
-            command.append(OPTION_SUB_BUFFER_SIZE);
+            command.append(LTTngControlServiceConstants.OPTION_SUB_BUFFER_SIZE);
             command.append(String.valueOf(info.getSubBufferSize()));
 
 //            --num-subbuf NUM     Number of subbufers
 //                                     (default: 8, kernel default: 4)
-            command.append(OPTION_NUM_SUB_BUFFERS);
+            command.append(LTTngControlServiceConstants.OPTION_NUM_SUB_BUFFERS);
             command.append(String.valueOf(info.getNumberOfSubBuffers()));
-            
+
 //            --switch-timer USEC  Switch timer interval in usec (default: 0)
-            command.append(OPTION_SWITCH_TIMER);
+            command.append(LTTngControlServiceConstants.OPTION_SWITCH_TIMER);
             command.append(String.valueOf(info.getSwitchTimer()));
 
 //            --read-timer USEC    Read timer interval in usec (default: 200)
-            command.append(OPTION_READ_TIMER);
+            command.append(LTTngControlServiceConstants.OPTION_READ_TIMER);
             command.append(String.valueOf(info.getReadTimer()));
-        } 
-
-        ICommandResult result = fCommandShell.executeCommand(command.toString(), monitor);
-        
-        if (isError(result)) {
-            throw new ExecutionException(Messages.TraceControl_CommandError + " " + command + "\n" + formatOutput(result.getOutput())); //$NON-NLS-1$ //$NON-NLS-2$
         }
+
+        executeCommand(command.toString(), monitor);
+
     }
 
-    /*
-     * (non-Javadoc)
-     * @see org.eclipse.linuxtools.internal.lttng2.ui.views.control.service.ILttngControlService#disableChannel(java.lang.String, java.util.List, org.eclipse.core.runtime.IProgressMonitor)
-     */
     @Override
     public void disableChannels(String sessionName, List<String> channelNames, boolean isKernel, IProgressMonitor monitor) throws ExecutionException {
-        
+
         // no channels to enable
         if (channelNames.isEmpty()) {
             return;
         }
 
-        String newSessionName = formatParameter(sessionName);
-        
-        StringBuffer command = new StringBuffer(COMMAND_DISABLE_CHANNEL);
+        StringBuffer command = createCommand(LTTngControlServiceConstants.COMMAND_DISABLE_CHANNEL);
 
         for (Iterator<String> iterator = channelNames.iterator(); iterator.hasNext();) {
-            String channel = (String) iterator.next();
+            String channel = iterator.next();
             command.append(channel);
             if (iterator.hasNext()) {
                 command.append(',');
@@ -738,248 +615,316 @@ public class LTTngControlService implements ILttngControlService {
         }
 
         if (isKernel) {
-            command.append(OPTION_KERNEL);
+            command.append(LTTngControlServiceConstants.OPTION_KERNEL);
         } else {
-            command.append(OPTION_UST);
+            command.append(LTTngControlServiceConstants.OPTION_UST);
         }
 
-        command.append(OPTION_SESSION);
+        String newSessionName = formatParameter(sessionName);
+        command.append(LTTngControlServiceConstants.OPTION_SESSION);
         command.append(newSessionName);
 
-        ICommandResult result = fCommandShell.executeCommand(command.toString(), monitor);
-        
-        if (isError(result)) {
-            throw new ExecutionException(Messages.TraceControl_CommandError + " " + command + "\n" + formatOutput(result.getOutput())); //$NON-NLS-1$ //$NON-NLS-2$
-        }
+        executeCommand(command.toString(), monitor);
     }
 
-    /*
-     * (non-Javadoc)
-     * @see org.eclipse.linuxtools.internal.lttng2.ui.views.control.service.ILttngControlService#enableEvent(java.lang.String, java.lang.String, java.util.List, boolean, org.eclipse.core.runtime.IProgressMonitor)
-     */
     @Override
-    public void enableEvents(String sessionName, String channelName, List<String> eventNames, boolean isKernel, IProgressMonitor monitor) throws ExecutionException {
+    public void enableEvents(String sessionName, String channelName, List<String> eventNames, boolean isKernel, String filterExpression, IProgressMonitor monitor) throws ExecutionException {
 
-        String newSessionName = formatParameter(sessionName);
-        
-        StringBuffer command = new StringBuffer(COMMAND_ENABLE_EVENT);
+        StringBuffer command = createCommand(LTTngControlServiceConstants.COMMAND_ENABLE_EVENT);
 
         if (eventNames == null || eventNames.isEmpty()) {
-            command.append(OPTION_ALL);
+            command.append(LTTngControlServiceConstants.OPTION_ALL);
         } else {
 
+            StringBuffer eventNameParameter = new StringBuffer();
             for (Iterator<String> iterator = eventNames.iterator(); iterator.hasNext();) {
-                String event = (String) iterator.next();
-                command.append(event);
+                String event = iterator.next();
+                eventNameParameter.append(event);
                 if (iterator.hasNext()) {
-                    command.append(',');
+                    eventNameParameter.append(',');
                 }
             }
+            command.append(formatParameter(eventNameParameter.toString()));
         }
 
         if (isKernel) {
-            command.append(OPTION_KERNEL);
+            command.append(LTTngControlServiceConstants.OPTION_KERNEL);
         } else {
-            command.append(OPTION_UST);
+            command.append(LTTngControlServiceConstants.OPTION_UST);
         }
 
-        command.append(OPTION_SESSION);
+        String newSessionName = formatParameter(sessionName);
+
+        command.append(LTTngControlServiceConstants.OPTION_SESSION);
         command.append(newSessionName);
 
         if (channelName != null) {
-            command.append(OPTION_CHANNEL);
+            command.append(LTTngControlServiceConstants.OPTION_CHANNEL);
             command.append(channelName);
         }
-        
-        command.append(OPTION_TRACEPOINT);
-        
-        ICommandResult result = fCommandShell.executeCommand(command.toString(), monitor);
-        
-        if (isError(result)) {
-            throw new ExecutionException(Messages.TraceControl_CommandError + " " + command + "\n" + formatOutput(result.getOutput())); //$NON-NLS-1$ //$NON-NLS-2$
+
+        command.append(LTTngControlServiceConstants.OPTION_TRACEPOINT);
+
+        if (filterExpression != null) {
+            command.append(LTTngControlServiceConstants.OPTION_FILTER);
+            command.append('\'');
+            command.append(filterExpression);
+            command.append('\'');
         }
+
+        executeCommand(command.toString(), monitor);
+
     }
 
-    /*
-     * (non-Javadoc)
-     * @see org.eclipse.linuxtools.internal.lttng2.ui.views.control.service.ILttngControlService#enableSyscalls(java.lang.String, java.lang.String, org.eclipse.core.runtime.IProgressMonitor)
-     */
     @Override
     public void enableSyscalls(String sessionName, String channelName, IProgressMonitor monitor) throws ExecutionException {
-        String newSessionName = formatParameter(sessionName);
-        
-        StringBuffer command = new StringBuffer(COMMAND_ENABLE_EVENT);
 
-        command.append(OPTION_ALL);
-        command.append(OPTION_KERNEL);
+        StringBuffer command = createCommand(LTTngControlServiceConstants.COMMAND_ENABLE_EVENT);
+
+        command.append(LTTngControlServiceConstants.OPTION_ALL);
+        command.append(LTTngControlServiceConstants.OPTION_KERNEL);
 
-        command.append(OPTION_SESSION);
+        String newSessionName = formatParameter(sessionName);
+
+        command.append(LTTngControlServiceConstants.OPTION_SESSION);
         command.append(newSessionName);
 
         if (channelName != null) {
-            command.append(OPTION_CHANNEL);
+            command.append(LTTngControlServiceConstants.OPTION_CHANNEL);
             command.append(channelName);
         }
-        
-        command.append(OPTION_SYSCALL);
-        
-        ICommandResult result = fCommandShell.executeCommand(command.toString(), monitor);
-        
-        if (isError(result)) {
-            throw new ExecutionException(Messages.TraceControl_CommandError + " " + command + "\n" + formatOutput(result.getOutput())); //$NON-NLS-1$ //$NON-NLS-2$
-        }        
+
+        command.append(LTTngControlServiceConstants.OPTION_SYSCALL);
+
+        executeCommand(command.toString(), monitor);
     }
-    
-    /*
-     * (non-Javadoc)
-     * @see org.eclipse.linuxtools.internal.lttng2.ui.views.control.service.ILttngControlService#enableProbe(java.lang.String, java.lang.String, java.lang.String, java.lang.String, org.eclipse.core.runtime.IProgressMonitor)
-     */
+
     @Override
     public void enableProbe(String sessionName, String channelName, String eventName, boolean isFunction, String probe, IProgressMonitor monitor) throws ExecutionException {
-        String newSessionName = formatParameter(sessionName);
-        
-        StringBuffer command = new StringBuffer(COMMAND_ENABLE_EVENT);
+        StringBuffer command = createCommand(LTTngControlServiceConstants.COMMAND_ENABLE_EVENT);
 
         command.append(eventName);
-        command.append(OPTION_KERNEL);
+        command.append(LTTngControlServiceConstants.OPTION_KERNEL);
 
-        command.append(OPTION_SESSION);
+        String newSessionName = formatParameter(sessionName);
+        command.append(LTTngControlServiceConstants.OPTION_SESSION);
         command.append(newSessionName);
 
         if (channelName != null) {
-            command.append(OPTION_CHANNEL);
+            command.append(LTTngControlServiceConstants.OPTION_CHANNEL);
             command.append(channelName);
         }
         if (isFunction) {
-            command.append(OPTION_FUNCTION_PROBE);
+            command.append(LTTngControlServiceConstants.OPTION_FUNCTION_PROBE);
         } else {
-            command.append(OPTION_PROBE);
+            command.append(LTTngControlServiceConstants.OPTION_PROBE);
         }
-        
+
         command.append(probe);
-        
-        ICommandResult result = fCommandShell.executeCommand(command.toString(), monitor);
-        
-        if (isError(result)) {
-            throw new ExecutionException(Messages.TraceControl_CommandError + " " + command + "\n" + formatOutput(result.getOutput())); //$NON-NLS-1$ //$NON-NLS-2$
-        }        
+
+        executeCommand(command.toString(), monitor);
     }
 
-    /*
-     * (non-Javadoc)
-     * @see org.eclipse.linuxtools.internal.lttng2.ui.views.control.service.ILttngControlService#enableLogLevel(java.lang.String, java.lang.String, java.lang.String, org.eclipse.linuxtools.internal.lttng2.ui.views.control.model.LogLevelType, org.eclipse.linuxtools.internal.lttng2.ui.views.control.model.TraceLogLevel, org.eclipse.core.runtime.IProgressMonitor)
-     */
     @Override
-    public void enableLogLevel(String sessionName, String channelName, String eventName, LogLevelType logLevelType, TraceLogLevel level, IProgressMonitor monitor) throws ExecutionException {
-        String newSessionName = formatParameter(sessionName);
-        
-        StringBuffer command = new StringBuffer(COMMAND_ENABLE_EVENT);
+    public void enableLogLevel(String sessionName, String channelName, String eventName, LogLevelType logLevelType, TraceLogLevel level, String filterExpression, IProgressMonitor monitor) throws ExecutionException {
+        StringBuffer command = createCommand(LTTngControlServiceConstants.COMMAND_ENABLE_EVENT);
 
         command.append(eventName);
-        command.append(OPTION_UST);
+        command.append(LTTngControlServiceConstants.OPTION_UST);
 
-        command.append(OPTION_SESSION);
+        String newSessionName = formatParameter(sessionName);
+        command.append(LTTngControlServiceConstants.OPTION_SESSION);
         command.append(newSessionName);
 
         if (channelName != null) {
-            command.append(OPTION_CHANNEL);
+            command.append(LTTngControlServiceConstants.OPTION_CHANNEL);
             command.append(channelName);
         }
-        
+
         if (logLevelType == LogLevelType.LOGLEVEL) {
-            command.append(OPTION_LOGLEVEL);
+            command.append(LTTngControlServiceConstants.OPTION_LOGLEVEL);
         } else if (logLevelType == LogLevelType.LOGLEVEL_ONLY) {
-            command.append(OPTION_LOGLEVEL_ONLY);
-            
+            command.append(LTTngControlServiceConstants.OPTION_LOGLEVEL_ONLY);
+
         } else {
             return;
         }
         command.append(level.getInName());
-        
-        ICommandResult result = fCommandShell.executeCommand(command.toString(), monitor);
-        
-        if (isError(result)) {
-            throw new ExecutionException(Messages.TraceControl_CommandError + " " + command + "\n" + formatOutput(result.getOutput())); //$NON-NLS-1$ //$NON-NLS-2$
-        }
+
+        executeCommand(command.toString(), monitor);
     }
 
-    /*
-     * (non-Javadoc)
-     * @see org.eclipse.linuxtools.internal.lttng2.ui.views.control.service.ILttngControlService#disableEvent(java.lang.String, java.lang.String, java.util.List, boolean, org.eclipse.core.runtime.IProgressMonitor)
-     */
     @Override
     public void disableEvent(String sessionName, String channelName, List<String> eventNames, boolean isKernel, IProgressMonitor monitor) throws ExecutionException {
-        String newSessionName = formatParameter(sessionName);
+        StringBuffer command = createCommand(LTTngControlServiceConstants.COMMAND_DISABLE_EVENT);
 
-        StringBuffer command = new StringBuffer(COMMAND_DISABLE_EVENT);
         if (eventNames == null) {
-            command.append(OPTION_ALL);
+            command.append(LTTngControlServiceConstants.OPTION_ALL);
         } else {
-            // no events to enable
+            // no events to disable
             if (eventNames.isEmpty()) {
                 return;
             }
 
+            StringBuffer eventNameParameter = new StringBuffer();
             for (Iterator<String> iterator = eventNames.iterator(); iterator.hasNext();) {
-                String event = (String) iterator.next();
-                command.append(event);
+                String event = iterator.next();
+                eventNameParameter.append(event);
                 if (iterator.hasNext()) {
-                    command.append(',');
+                    eventNameParameter.append(',');
                 }
             }
+            command.append(formatParameter(eventNameParameter.toString()));
         }
 
         if (isKernel) {
-            command.append(OPTION_KERNEL);
+            command.append(LTTngControlServiceConstants.OPTION_KERNEL);
         } else {
-            command.append(OPTION_UST);
+            command.append(LTTngControlServiceConstants.OPTION_UST);
         }
 
-        command.append(OPTION_SESSION);
+        String newSessionName = formatParameter(sessionName);
+        command.append(LTTngControlServiceConstants.OPTION_SESSION);
         command.append(newSessionName);
 
         if (channelName != null) {
-            command.append(OPTION_CHANNEL);
+            command.append(LTTngControlServiceConstants.OPTION_CHANNEL);
             command.append(channelName);
         }
 
-        ICommandResult result = fCommandShell.executeCommand(command.toString(), monitor);
-        
-        if (isError(result)) {
-            throw new ExecutionException(Messages.TraceControl_CommandError + " " + command + "\n" + formatOutput(result.getOutput())); //$NON-NLS-1$ //$NON-NLS-2$
+        executeCommand(command.toString(), monitor);
+    }
+
+    @Override
+    public List<String> getContextList(IProgressMonitor monitor) throws ExecutionException {
+
+        StringBuffer command = createCommand(LTTngControlServiceConstants.COMMAND_ADD_CONTEXT, LTTngControlServiceConstants.OPTION_HELP);
+
+        ICommandResult result = executeCommand(command.toString(), monitor);
+
+        String[] output = result.getOutput();
+
+        List<String> contexts = new ArrayList<String>(0);
+
+        int index = 0;
+        boolean inList = false;
+        while (index < output.length) {
+            String line = result.getOutput()[index];
+
+            Matcher startMatcher = LTTngControlServiceConstants.ADD_CONTEXT_HELP_CONTEXTS_INTRO.matcher(line);
+            Matcher endMatcher = LTTngControlServiceConstants.ADD_CONTEXT_HELP_CONTEXTS_END_LINE.matcher(line);
+
+            if (startMatcher.matches()) {
+                inList = true;
+            } else if (endMatcher.matches()) {
+                break;
+            } else if (inList == true) {
+                String[] tmp = line.split(","); //$NON-NLS-1$
+                for (int i = 0; i < tmp.length; i++) {
+                    contexts.add(tmp[i].trim());
+                }
+            }
+            index++;
+        }
+        return contexts;
+    }
+
+    @Override
+    public void addContexts(String sessionName, String channelName, String eventName, boolean isKernel, List<String> contextNames, IProgressMonitor monitor) throws ExecutionException {
+        StringBuffer command = createCommand(LTTngControlServiceConstants.COMMAND_ADD_CONTEXT);
+
+        String newSessionName = formatParameter(sessionName);
+        command.append(LTTngControlServiceConstants.OPTION_SESSION);
+        command.append(newSessionName);
+
+        if (channelName != null) {
+            command.append(LTTngControlServiceConstants.OPTION_CHANNEL);
+            command.append(channelName);
+        }
+
+        if (eventName != null) {
+            command.append(LTTngControlServiceConstants.OPTION_EVENT);
+            command.append(eventName);
+        }
+
+        if (isKernel) {
+            command.append(LTTngControlServiceConstants.OPTION_KERNEL);
+        } else {
+            command.append(LTTngControlServiceConstants.OPTION_UST);
+        }
+
+        for (Iterator<String> iterator = contextNames.iterator(); iterator.hasNext();) {
+            String context = iterator.next();
+            command.append(LTTngControlServiceConstants.OPTION_CONTEXT_TYPE);
+            command.append(context);
+        }
+
+        executeCommand(command.toString(), monitor);
+
+    }
+
+    @Override
+    public void calibrate(boolean isKernel, IProgressMonitor monitor) throws ExecutionException {
+        StringBuffer command = createCommand(LTTngControlServiceConstants.COMMAND_CALIBRATE);
+
+        if (isKernel) {
+            command.append(LTTngControlServiceConstants.OPTION_KERNEL);
+        } else {
+            command.append(LTTngControlServiceConstants.OPTION_UST);
         }
+
+        command.append(LTTngControlServiceConstants.OPTION_FUNCTION_PROBE);
+
+        executeCommand(command.toString(), monitor);
     }
-    
+
     // ------------------------------------------------------------------------
     // Helper methods
     // ------------------------------------------------------------------------
+
     /**
      * Checks if command result is an error result.
-     * 
+     *
      * @param result
      *            - the command result to check
      * @return true if error else false
      */
-    private boolean isError(ICommandResult result) {
-        if ((result.getResult()) != 0 || (result.getOutput().length < 1 || ERROR_PATTERN.matcher(result.getOutput()[0]).matches())) {
+    protected boolean isError(ICommandResult result) {
+        // Check return code and length of returned strings
+        if ((result.getResult()) != 0 || (result.getOutput().length < 1)) {
             return true;
         }
+
+        // Look for error pattern
+        int index = 0;
+        while (index < result.getOutput().length) {
+            String line = result.getOutput()[index];
+            Matcher matcher = LTTngControlServiceConstants.ERROR_PATTERN.matcher(line);
+            if (matcher.matches()) {
+                return true;
+            }
+            index++;
+        }
+
         return false;
     }
 
     /**
      * Formats the output string as single string.
-     * 
-     * @param output
+     *
+     * @param result
      *            - output array
      * @return - the formatted output
      */
-    private String formatOutput(String[] output) {
-        if (output == null || output.length == 0) {
+    public static String formatOutput(ICommandResult result) {
+        if ((result == null) || result.getOutput() == null || result.getOutput().length == 0) {
             return ""; //$NON-NLS-1$
         }
-
+        String[] output = result.getOutput();
         StringBuffer ret = new StringBuffer();
+        ret.append("Return Value: "); //$NON-NLS-1$
+        ret.append(result.getResult());
+        ret.append("\n"); //$NON-NLS-1$
         for (int i = 0; i < output.length; i++) {
             ret.append(output[i] + "\n"); //$NON-NLS-1$
         }
@@ -988,7 +933,7 @@ public class LTTngControlService implements ILttngControlService {
 
     /**
      * Parses the domain information.
-     * 
+     *
      * @param output
      *            - a command output array
      * @param currentIndex
@@ -997,7 +942,7 @@ public class LTTngControlService implements ILttngControlService {
      *            - list for returning channel information
      * @return the new current index in command output array
      */
-    private int parseDomain(String[] output, int currentIndex, List<IChannelInfo> channels) {
+    protected int parseDomain(String[] output, int currentIndex, List<IChannelInfo> channels) {
         int index = currentIndex;
 
         // Channels:
@@ -1015,13 +960,15 @@ public class LTTngControlService implements ILttngControlService {
         while (index < output.length) {
             String line = output[index];
 
-            Matcher outerMatcher = CHANNELS_SECTION_PATTERN.matcher(line);
+            Matcher outerMatcher = LTTngControlServiceConstants.CHANNELS_SECTION_PATTERN.matcher(line);
+            Matcher noKernelChannelMatcher = LTTngControlServiceConstants.DOMAIN_NO_KERNEL_CHANNEL_PATTERN.matcher(line);
+            Matcher noUstChannelMatcher = LTTngControlServiceConstants.DOMAIN_NO_UST_CHANNEL_PATTERN.matcher(line);
             if (outerMatcher.matches()) {
                 IChannelInfo channelInfo = null;
                 while (index < output.length) {
                     String subLine = output[index];
 
-                    Matcher innerMatcher = CHANNEL_PATTERN.matcher(subLine);
+                    Matcher innerMatcher = LTTngControlServiceConstants.CHANNEL_PATTERN.matcher(subLine);
                     if (innerMatcher.matches()) {
                         channelInfo = new ChannelInfo(""); //$NON-NLS-1$
                         // get channel name
@@ -1033,39 +980,57 @@ public class LTTngControlService implements ILttngControlService {
                         // add channel
                         channels.add(channelInfo);
 
-                    } else if (OVERWRITE_MODE_ATTRIBUTE.matcher(subLine).matches()) {
+                    } else if (LTTngControlServiceConstants.OVERWRITE_MODE_ATTRIBUTE.matcher(subLine).matches()) {
                         String value = getAttributeValue(subLine);
-                        channelInfo.setOverwriteMode(!OVERWRITE_MODE_ATTRIBUTE_FALSE.equals(value));
-                    } else if (SUBBUFFER_SIZE_ATTRIBUTE.matcher(subLine).matches()) {
-                        channelInfo.setSubBufferSize(Long.valueOf(getAttributeValue(subLine)));
+                        if (channelInfo != null) {
+                            channelInfo.setOverwriteMode(!LTTngControlServiceConstants.OVERWRITE_MODE_ATTRIBUTE_FALSE.equals(value));
+                        }
+                    } else if (LTTngControlServiceConstants.SUBBUFFER_SIZE_ATTRIBUTE.matcher(subLine).matches()) {
+                        if (channelInfo != null) {
+                            channelInfo.setSubBufferSize(Long.valueOf(getAttributeValue(subLine)));
+                        }
 
-                    } else if (NUM_SUBBUFFERS_ATTRIBUTE.matcher(subLine).matches()) {
-                        channelInfo.setNumberOfSubBuffers(Integer.valueOf(getAttributeValue(subLine)));
+                    } else if (LTTngControlServiceConstants.NUM_SUBBUFFERS_ATTRIBUTE.matcher(subLine).matches()) {
+                        if (channelInfo != null) {
+                            channelInfo.setNumberOfSubBuffers(Integer.valueOf(getAttributeValue(subLine)));
+                        }
 
-                    } else if (SWITCH_TIMER_ATTRIBUTE.matcher(subLine).matches()) {
-                        channelInfo.setSwitchTimer(Long.valueOf(getAttributeValue(subLine)));
+                    } else if (LTTngControlServiceConstants.SWITCH_TIMER_ATTRIBUTE.matcher(subLine).matches()) {
+                        if (channelInfo != null) {
+                            channelInfo.setSwitchTimer(Long.valueOf(getAttributeValue(subLine)));
+                        }
 
-                    } else if (READ_TIMER_ATTRIBUTE.matcher(subLine).matches()) {
-                        channelInfo.setReadTimer(Long.valueOf(getAttributeValue(subLine)));
+                    } else if (LTTngControlServiceConstants.READ_TIMER_ATTRIBUTE.matcher(subLine).matches()) {
+                        if (channelInfo != null) {
+                            channelInfo.setReadTimer(Long.valueOf(getAttributeValue(subLine)));
+                        }
 
-                    } else if (OUTPUT_ATTRIBUTE.matcher(subLine).matches()) {
-                        channelInfo.setOutputType(getAttributeValue(subLine));
+                    } else if (LTTngControlServiceConstants.OUTPUT_ATTRIBUTE.matcher(subLine).matches()) {
+                        if (channelInfo != null) {
+                            channelInfo.setOutputType(getAttributeValue(subLine));
+                        }
 
-                    } else if (EVENT_SECTION_PATTERN.matcher(subLine).matches()) {
+                    } else if (LTTngControlServiceConstants.EVENT_SECTION_PATTERN.matcher(subLine).matches()) {
                         List<IEventInfo> events = new ArrayList<IEventInfo>();
                         index = parseEvents(output, index, events);
-                        channelInfo.setEvents(events);
+                        if (channelInfo != null) {
+                            channelInfo.setEvents(events);
+                        }
                         // we want to stay at the current index to be able to
                         // exit the domain
                         continue;
-                    } else if (DOMAIN_KERNEL_PATTERN.matcher(subLine).matches()) {
+                    } else if (LTTngControlServiceConstants.DOMAIN_KERNEL_PATTERN.matcher(subLine).matches()) {
                         return index;
 
-                    } else if (DOMAIN_UST_GLOBAL_PATTERN.matcher(subLine).matches()) {
+                    } else if (LTTngControlServiceConstants.DOMAIN_UST_GLOBAL_PATTERN.matcher(subLine).matches()) {
                         return index;
                     }
                     index++;
                 }
+            } else if (noKernelChannelMatcher.matches() || noUstChannelMatcher.matches()) {
+                // domain indicates that no channels were found -> return
+                index++;
+                return index;
             }
             index++;
         }
@@ -1074,7 +1039,7 @@ public class LTTngControlService implements ILttngControlService {
 
     /**
      * Parses the event information within a domain.
-     * 
+     *
      * @param output
      *            - a command output array
      * @param currentIndex
@@ -1083,30 +1048,35 @@ public class LTTngControlService implements ILttngControlService {
      *            - list for returning event information
      * @return the new current index in command output array
      */
-    private int parseEvents(String[] output, int currentIndex, List<IEventInfo> events) {
+    protected int parseEvents(String[] output, int currentIndex, List<IEventInfo> events) {
         int index = currentIndex;
 
         while (index < output.length) {
             String line = output[index];
-            if (CHANNEL_PATTERN.matcher(line).matches()) {
+            if (LTTngControlServiceConstants.CHANNEL_PATTERN.matcher(line).matches()) {
                 // end of channel
                 return index;
-            } else if (DOMAIN_KERNEL_PATTERN.matcher(line).matches()) {
+            } else if (LTTngControlServiceConstants.DOMAIN_KERNEL_PATTERN.matcher(line).matches()) {
                 // end of domain
                 return index;
-            } else if (DOMAIN_UST_GLOBAL_PATTERN.matcher(line).matches()) {
+            } else if (LTTngControlServiceConstants.DOMAIN_UST_GLOBAL_PATTERN.matcher(line).matches()) {
                 // end of domain
                 return index;
-            } 
+            }
 
-            Matcher matcher = EVENT_PATTERN.matcher(line);
-            Matcher matcher2 = WILDCARD_EVENT_PATTERN.matcher(line);
+            Matcher matcher = LTTngControlServiceConstants.EVENT_PATTERN.matcher(line);
+            Matcher matcher2 = LTTngControlServiceConstants.WILDCARD_EVENT_PATTERN.matcher(line);
 
             if (matcher.matches()) {
                 IEventInfo eventInfo = new EventInfo(matcher.group(1).trim());
                 eventInfo.setLogLevel(matcher.group(2).trim());
                 eventInfo.setEventType(matcher.group(3).trim());
                 eventInfo.setState(matcher.group(4));
+                String filter = matcher.group(5);
+                if (filter != null) {
+                    filter = filter.substring(1, filter.length() - 1); // remove '[' and ']'
+                    eventInfo.setFilterExpression(filter);
+                }
                 events.add(eventInfo);
                 index++;
             } else if (matcher2.matches()) {
@@ -1114,7 +1084,12 @@ public class LTTngControlService implements ILttngControlService {
                 eventInfo.setLogLevel(TraceLogLevel.LEVEL_UNKNOWN);
                 eventInfo.setEventType(matcher2.group(2).trim());
                 eventInfo.setState(matcher2.group(3));
-                
+                String filter = matcher2.group(4);
+                if (filter != null) {
+                    filter = filter.substring(1, filter.length() - 1); // remove '[' and ']'
+                    eventInfo.setFilterExpression(filter);
+                }
+
                 if (eventInfo.getEventType() == TraceEventType.PROBE) {
                     IProbeEventInfo probeEvent = new ProbeEventInfo(eventInfo.getName());
                     probeEvent.setLogLevel(eventInfo.getLogLevel());
@@ -1133,9 +1108,9 @@ public class LTTngControlService implements ILttngControlService {
                     while (index < output.length) {
                         String probeLine = output[index];
                         // parse probe
-                        Matcher addrMatcher = PROBE_ADDRESS_PATTERN.matcher(probeLine);
-                        Matcher offsetMatcher = PROBE_OFFSET_PATTERN.matcher(probeLine);
-                        Matcher symbolMatcher = PROBE_SYMBOL_PATTERN.matcher(probeLine);
+                        Matcher addrMatcher = LTTngControlServiceConstants.PROBE_ADDRESS_PATTERN.matcher(probeLine);
+                        Matcher offsetMatcher = LTTngControlServiceConstants.PROBE_OFFSET_PATTERN.matcher(probeLine);
+                        Matcher symbolMatcher = LTTngControlServiceConstants.PROBE_SYMBOL_PATTERN.matcher(probeLine);
                         if (addrMatcher.matches()) {
                             String addr = addrMatcher.group(2).trim();
                             probeEvent.setAddress(addr);
@@ -1145,14 +1120,14 @@ public class LTTngControlService implements ILttngControlService {
                         } else if (symbolMatcher.matches()) {
                             String symbol = symbolMatcher.group(2).trim();
                             probeEvent.setSymbol(symbol);
-                        } else if ((EVENT_PATTERN.matcher(probeLine).matches()) || (WILDCARD_EVENT_PATTERN.matcher(probeLine).matches())) {
+                        } else if ((LTTngControlServiceConstants.EVENT_PATTERN.matcher(probeLine).matches()) || (LTTngControlServiceConstants.WILDCARD_EVENT_PATTERN.matcher(probeLine).matches())) {
                             break;
-                        } else if (CHANNEL_PATTERN.matcher(probeLine).matches()) {
+                        } else if (LTTngControlServiceConstants.CHANNEL_PATTERN.matcher(probeLine).matches()) {
                             break;
-                        } else if (DOMAIN_KERNEL_PATTERN.matcher(probeLine).matches()) {
+                        } else if (LTTngControlServiceConstants.DOMAIN_KERNEL_PATTERN.matcher(probeLine).matches()) {
                             // end of domain
                             break;
-                        } else if (DOMAIN_UST_GLOBAL_PATTERN.matcher(probeLine).matches()) {
+                        } else if (LTTngControlServiceConstants.DOMAIN_UST_GLOBAL_PATTERN.matcher(probeLine).matches()) {
                             // end of domain
                             break;
                         }
@@ -1167,10 +1142,6 @@ public class LTTngControlService implements ILttngControlService {
             } else {
                 index++;
             }
-//            else if (line.matches(EVENT_NONE_PATTERN)) {
-                // do nothing
-//            } else 
-
         }
 
         return index;
@@ -1178,19 +1149,19 @@ public class LTTngControlService implements ILttngControlService {
 
     /**
      * Parses a line with attributes: <attribute Name>: <attribute value>
-     * 
+     *
      * @param line
      *            - attribute line to parse
      * @return the attribute value as string
      */
-    private String getAttributeValue(String line) {
+    protected String getAttributeValue(String line) {
         String[] temp = line.split("\\: "); //$NON-NLS-1$
         return temp[1];
     }
 
     /**
      * Parses the event information within a provider.
-     * 
+     *
      * @param output
      *            - a command output array
      * @param currentIndex
@@ -1199,19 +1170,63 @@ public class LTTngControlService implements ILttngControlService {
      *            - list for returning event information
      * @return the new current index in command output array
      */
-    private int getProviderEventInfo(String[] output, int currentIndex, List<IBaseEventInfo> events) {
+    protected int getProviderEventInfo(String[] output, int currentIndex, List<IBaseEventInfo> events) {
         int index = currentIndex;
+        IBaseEventInfo eventInfo = null;
         while (index < output.length) {
             String line = output[index];
-            Matcher matcher = PROVIDER_EVENT_PATTERN.matcher(line);
+            Matcher matcher = LTTngControlServiceConstants.PROVIDER_EVENT_PATTERN.matcher(line);
             if (matcher.matches()) {
-                // sched_kthread_stop (loglevel: TRACE_EMERG0) (type:
-                // tracepoint)
-                IBaseEventInfo eventInfo = new BaseEventInfo(matcher.group(1).trim());
+                // sched_kthread_stop (loglevel: TRACE_EMERG0) (type: tracepoint)
+                eventInfo = new BaseEventInfo(matcher.group(1).trim());
                 eventInfo.setLogLevel(matcher.group(2).trim());
                 eventInfo.setEventType(matcher.group(3).trim());
                 events.add(eventInfo);
-            } else if (UST_PROVIDER_PATTERN.matcher(line).matches()) {
+                index++;
+            } else if (LTTngControlServiceConstants.EVENT_FIELD_PATTERN.matcher(line).matches()) {
+                if (eventInfo != null) {
+                    List<IFieldInfo> fields = new ArrayList<IFieldInfo>();
+                    index = getFieldInfo(output, index, fields);
+                    eventInfo.setFields(fields);
+                } else {
+                    index++;
+                }
+            }
+            else if (LTTngControlServiceConstants.UST_PROVIDER_PATTERN.matcher(line).matches()) {
+                return index;
+            } else {
+                index++;
+            }
+        }
+        return index;
+    }
+
+
+    /**
+     * Parse a field's information.
+     *
+     * @param output
+     *            A command output array
+     * @param currentIndex
+     *            The current index in the command output array
+     * @param fields
+     *            List for returning the field information
+     * @return The new current index in the command output array
+     */
+    protected int getFieldInfo(String[] output, int currentIndex, List<IFieldInfo> fields) {
+        int index = currentIndex;
+        IFieldInfo fieldInfo = null;
+        while (index < output.length) {
+            String line = output[index];
+            Matcher matcher = LTTngControlServiceConstants.EVENT_FIELD_PATTERN.matcher(line);
+            if (matcher.matches()) {
+                // field: content (string)
+                fieldInfo = new FieldInfo(matcher.group(2).trim());
+                fieldInfo.setFieldType(matcher.group(3).trim());
+                fields.add(fieldInfo);
+            } else if (LTTngControlServiceConstants.PROVIDER_EVENT_PATTERN.matcher(line).matches()) {
+                return index;
+            } else if (LTTngControlServiceConstants.UST_PROVIDER_PATTERN.matcher(line).matches()) {
                 return index;
             }
             index++;
@@ -1220,17 +1235,17 @@ public class LTTngControlService implements ILttngControlService {
     }
 
     /**
-     * Formats a command parameter for the command execution i.e. adds quotes 
+     * Formats a command parameter for the command execution i.e. adds quotes
      * at the beginning and end if necessary.
      * @param parameter - parameter to format
      * @return formated parameter
      */
-    private String formatParameter(String parameter) {
+    protected String formatParameter(String parameter) {
         if (parameter != null) {
             StringBuffer newString = new StringBuffer();
             newString.append(parameter);
 
-            if (parameter.contains(" ")) { //$NON-NLS-1$
+            if (parameter.contains(" ") || parameter.contains("*")) { //$NON-NLS-1$ //$NON-NLS-2$
                 newString.insert(0, "\""); //$NON-NLS-1$
                 newString.append("\""); //$NON-NLS-1$
             }
@@ -1238,5 +1253,101 @@ public class LTTngControlService implements ILttngControlService {
         }
         return null;
     }
-    
+
+    /**
+     * @param strings array of string that makes up a command line
+     * @return string buffer with created command line
+     */
+    protected StringBuffer createCommand(String... strings) {
+        StringBuffer command = new StringBuffer();
+        command.append(LTTngControlServiceConstants.CONTROL_COMMAND);
+        command.append(getTracingGroupOption());
+        command.append(getVerboseOption());
+        for (String string : strings) {
+            command.append(string);
+        }
+        return command;
+    }
+
+    /**
+     * @return the tracing group option if configured in the preferences
+     */
+    protected String getTracingGroupOption() {
+        if (!ControlPreferences.getInstance().isDefaultTracingGroup() && !ControlPreferences.getInstance().getTracingGroup().equals("")) { //$NON-NLS-1$
+            return LTTngControlServiceConstants.OPTION_TRACING_GROUP + ControlPreferences.getInstance().getTracingGroup();
+        }
+        return ""; //$NON-NLS-1$
+    }
+
+    /**
+     * @return the verbose option as configured in the preferences
+     */
+    protected String getVerboseOption() {
+        if (ControlPreferences.getInstance().isLoggingEnabled()) {
+            String level = ControlPreferences.getInstance().getVerboseLevel();
+            if (ControlPreferences.TRACE_CONTROL_VERBOSE_LEVEL_VERBOSE.equals(level)) {
+                return LTTngControlServiceConstants.OPTION_VERBOSE;
+            }
+            if (ControlPreferences.TRACE_CONTROL_VERBOSE_LEVEL_V_VERBOSE.equals(level)) {
+                return LTTngControlServiceConstants.OPTION_VERY_VERBOSE;
+            }
+            if (ControlPreferences.TRACE_CONTROL_VERBOSE_LEVEL_V_V_VERBOSE.equals(level)) {
+                return LTTngControlServiceConstants.OPTION_VERY_VERY_VERBOSE;
+            }
+        }
+        return ""; //$NON-NLS-1$
+    }
+
+    /**
+     * Method that logs the command and command result if logging is enabled as
+     * well as forwards the command execution to the shell.
+     *
+     * @param command
+     *            - the command to execute
+     * @param monitor
+     *            - a progress monitor
+     * @return the command result
+     * @throws ExecutionException
+     *             If the command fails
+     */
+    protected ICommandResult executeCommand(String command,
+            IProgressMonitor monitor) throws ExecutionException {
+        return executeCommand(command, monitor, true);
+    }
+
+    /**
+     * Method that logs the command and command result if logging is enabled as
+     * well as forwards the command execution to the shell.
+     *
+     * @param command
+     *            - the command to execute
+     * @param monitor
+     *            - a progress monitor
+     * @param checkForError
+     *            - true to verify command result, else false
+     * @return the command result
+     * @throws ExecutionException
+     *             in case of error result
+     */
+    protected ICommandResult executeCommand(String command,
+            IProgressMonitor monitor, boolean checkForError)
+            throws ExecutionException {
+        if (ControlPreferences.getInstance().isLoggingEnabled()) {
+            ControlCommandLogger.log(command);
+        }
+
+        ICommandResult result = fCommandShell.executeCommand(
+                command.toString(), monitor);
+
+        if (ControlPreferences.getInstance().isLoggingEnabled()) {
+            ControlCommandLogger.log(formatOutput(result));
+        }
+
+        if (checkForError && isError(result)) {
+            throw new ExecutionException(Messages.TraceControl_CommandError
+                    + " " + command.toString() + "\n" + formatOutput(result)); //$NON-NLS-1$ //$NON-NLS-2$
+        }
+
+        return result;
+    }
 }
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