org.eclipse.linuxtools.lttng2.ui/src/org/eclipse/linuxtools/internal/lttng2/ui/views/control/service/LTTngControlService.java

   1 /**********************************************************************
   2  * Copyright (c) 2012, 2013 Ericsson
   3  *
   4  * All rights reserved. This program and the accompanying materials are
   5  * made available under the terms of the Eclipse Public License v1.0 which
   6  * accompanies this distribution, and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  *
   9  * Contributors:
  10  *   Bernd Hufmann - Initial API and implementation
  11  *   Bernd Hufmann - Updated for support of LTTng Tools 2.1
  12  *   Simon Delisle - Updated for support of LTTng Tools 2.2
  13  **********************************************************************/
  14 package org.eclipse.linuxtools.internal.lttng2.ui.views.control.service;
  15
  16 import java.util.ArrayList;
  17 import java.util.Iterator;
  18 import java.util.List;
  19 import java.util.regex.Matcher;
  20
  21 import org.eclipse.core.commands.ExecutionException;
  22 import org.eclipse.core.runtime.IProgressMonitor;
  23 import org.eclipse.core.runtime.NullProgressMonitor;
  24 import org.eclipse.linuxtools.internal.lttng2.core.control.model.IBaseEventInfo;
  25 import org.eclipse.linuxtools.internal.lttng2.core.control.model.IChannelInfo;
  26 import org.eclipse.linuxtools.internal.lttng2.core.control.model.IDomainInfo;
  27 import org.eclipse.linuxtools.internal.lttng2.core.control.model.IEventInfo;
  28 import org.eclipse.linuxtools.internal.lttng2.core.control.model.IFieldInfo;
  29 import org.eclipse.linuxtools.internal.lttng2.core.control.model.IProbeEventInfo;
  30 import org.eclipse.linuxtools.internal.lttng2.core.control.model.ISessionInfo;
  31 import org.eclipse.linuxtools.internal.lttng2.core.control.model.IUstProviderInfo;
  32 import org.eclipse.linuxtools.internal.lttng2.core.control.model.LogLevelType;
  33 import org.eclipse.linuxtools.internal.lttng2.core.control.model.TraceEventType;
  34 import org.eclipse.linuxtools.internal.lttng2.core.control.model.TraceLogLevel;
  35 import org.eclipse.linuxtools.internal.lttng2.core.control.model.impl.BaseEventInfo;
  36 import org.eclipse.linuxtools.internal.lttng2.core.control.model.impl.BufferTypeConstants;
  37 import org.eclipse.linuxtools.internal.lttng2.core.control.model.impl.ChannelInfo;
  38 import org.eclipse.linuxtools.internal.lttng2.core.control.model.impl.DomainInfo;
  39 import org.eclipse.linuxtools.internal.lttng2.core.control.model.impl.EventInfo;
  40 import org.eclipse.linuxtools.internal.lttng2.core.control.model.impl.FieldInfo;
  41 import org.eclipse.linuxtools.internal.lttng2.core.control.model.impl.ProbeEventInfo;
  42 import org.eclipse.linuxtools.internal.lttng2.core.control.model.impl.SessionInfo;
  43 import org.eclipse.linuxtools.internal.lttng2.core.control.model.impl.UstProviderInfo;
  44 import org.eclipse.linuxtools.internal.lttng2.ui.views.control.logging.ControlCommandLogger;
  45 import org.eclipse.linuxtools.internal.lttng2.ui.views.control.messages.Messages;
  46 import org.eclipse.linuxtools.internal.lttng2.ui.views.control.preferences.ControlPreferences;
  47 import org.eclipse.linuxtools.internal.lttng2.ui.views.control.remote.ICommandResult;
  48 import org.eclipse.linuxtools.internal.lttng2.ui.views.control.remote.ICommandShell;
  49
  50 /**
  51  * <p>
  52  * Service for sending LTTng trace control commands to remote host.
  53  * </p>
  54  *
  55  * @author Bernd Hufmann
  56  */
  57 public class LTTngControlService implements ILttngControlService {
  58
  59     // ------------------------------------------------------------------------
  60     // Attributes
  61     // ------------------------------------------------------------------------
  62     /**
  63      * The command shell implementation
  64      */
  65     private final ICommandShell fCommandShell;
  66
  67     /**
  68      * The version string.
  69      */
  70     private LttngVersion fVersion = null;
  71
  72     // ------------------------------------------------------------------------
  73     // Constructors
  74     // ------------------------------------------------------------------------
  75
  76     /**
  77      * Constructor
  78      *
  79      * @param shell
  80      *            - the command shell implementation to use
  81      */
  82     public LTTngControlService(ICommandShell shell) {
  83         fCommandShell = shell;
  84     }
  85
  86     // ------------------------------------------------------------------------
  87     // Accessors
  88     // ------------------------------------------------------------------------
  89
  90     @Override
  91     public String getVersion() {
  92         if (fVersion == null) {
  93             return "Unknown"; //$NON-NLS-1$
  94         }
  95         return fVersion.toString();
  96     }
  97
  98     /**
  99      * Sets the version of the LTTng 2.0 control service.
 100      * @param version - a version to set
 101      */
 102     public void setVersion(String version) {
 103         fVersion = new LttngVersion(version);
 104     }
 105
 106     @Override
 107     public boolean isVersionSupported(String version) {
 108         LttngVersion tmp = new LttngVersion(version);
 109         return (fVersion != null && fVersion.compareTo(tmp) >= 0) ? true : false;
 110     }
 111
 112     /**
 113      * Returns the command shell implementation.
 114      *
 115      * @return the command shell implementation
 116      */
 117     protected ICommandShell getCommandShell() {
 118         return fCommandShell;
 119     }
 120
 121     // ------------------------------------------------------------------------
 122     // Operations
 123     // ------------------------------------------------------------------------
 124
 125     @Override
 126     public String[] getSessionNames(IProgressMonitor monitor) throws ExecutionException {
 127         StringBuffer command = createCommand(LTTngControlServiceConstants.COMMAND_LIST);
 128
 129         ICommandResult result = executeCommand(command.toString(), monitor);
 130
 131         // Output:
 132         // Available tracing sessions:
 133         // 1) mysession1 (/home/user/lttng-traces/mysession1-20120123-083928) [inactive]
 134         // 2) mysession (/home/user/lttng-traces/mysession-20120123-083318) [inactive]
 135         //
 136         // Use lttng list <session_name> for more details
 137
 138         ArrayList<String> retArray = new ArrayList<String>();
 139         int index = 0;
 140         while (index < result.getOutput().length) {
 141             String line = result.getOutput()[index];
 142             Matcher matcher = LTTngControlServiceConstants.SESSION_PATTERN.matcher(line);
 143             if (matcher.matches()) {
 144                 retArray.add(matcher.group(2).trim());
 145             }
 146             index++;
 147         }
 148         return retArray.toArray(new String[retArray.size()]);
 149     }
 150
 151     @Override
 152     public ISessionInfo getSession(String sessionName, IProgressMonitor monitor) throws ExecutionException {
 153         StringBuffer command = createCommand(LTTngControlServiceConstants.COMMAND_LIST, sessionName);
 154         ICommandResult result = executeCommand(command.toString(), monitor);
 155
 156         int index = 0;
 157
 158         // Output:
 159         // Tracing session mysession2: [inactive]
 160         // Trace path: /home/eedbhu/lttng-traces/mysession2-20120123-110330
 161         ISessionInfo sessionInfo = new SessionInfo(sessionName);
 162
 163         while (index < result.getOutput().length) {
 164             // Tracing session mysession2: [inactive]
 165             // Trace path: /home/eedbhu/lttng-traces/mysession2-20120123-110330
 166             //
 167             // === Domain: Kernel ===
 168             //
 169             String line = result.getOutput()[index];
 170             Matcher matcher = LTTngControlServiceConstants.TRACE_SESSION_PATTERN.matcher(line);
 171             if (matcher.matches()) {
 172                 sessionInfo.setSessionState(matcher.group(2));
 173                 index++;
 174                 continue;
 175             }
 176
 177             matcher = LTTngControlServiceConstants.TRACE_NETWORK_PATH_PATTERN.matcher(line);
 178             if (matcher.matches()) {
 179                 sessionInfo.setStreamedTrace(true);
 180             }
 181
 182             matcher = LTTngControlServiceConstants.TRACE_SESSION_PATH_PATTERN.matcher(line);
 183             if (matcher.matches()) {
 184                 sessionInfo.setSessionPath(matcher.group(1).trim());
 185                 index++;
 186                 continue;
 187             }
 188
 189             matcher = LTTngControlServiceConstants.DOMAIN_KERNEL_PATTERN.matcher(line);
 190             if (matcher.matches()) {
 191                 // Create Domain
 192                 IDomainInfo domainInfo = new DomainInfo(Messages.TraceControl_KernelDomainDisplayName);
 193
 194                 // in domain kernel
 195                 ArrayList<IChannelInfo> channels = new ArrayList<IChannelInfo>();
 196                 index = parseDomain(result.getOutput(), index, channels, domainInfo);
 197
 198                 if (channels.size() > 0) {
 199                     // add domain
 200                     sessionInfo.addDomain(domainInfo);
 201
 202                     // set channels
 203                     domainInfo.setChannels(channels);
 204
 205                     // set kernel flag
 206                     domainInfo.setIsKernel(true);
 207                 }
 208                 continue;
 209             }
 210
 211             matcher = LTTngControlServiceConstants.DOMAIN_UST_GLOBAL_PATTERN.matcher(line);
 212             if (matcher.matches()) {
 213                 IDomainInfo domainInfo = new DomainInfo(Messages.TraceControl_UstGlobalDomainDisplayName);
 214
 215                 // in domain UST
 216                 ArrayList<IChannelInfo> channels = new ArrayList<IChannelInfo>();
 217                 index = parseDomain(result.getOutput(), index, channels, domainInfo);
 218
 219                 if (channels.size() > 0) {
 220                     // add domain
 221                     sessionInfo.addDomain(domainInfo);
 222
 223                     // set channels
 224                     domainInfo.setChannels(channels);
 225
 226                     // set kernel flag
 227                     domainInfo.setIsKernel(false);
 228                 }
 229                 continue;
 230             }
 231             index++;
 232         }
 233         return sessionInfo;
 234     }
 235
 236     @Override
 237     public List<IBaseEventInfo> getKernelProvider(IProgressMonitor monitor) throws ExecutionException {
 238         StringBuffer command = createCommand(LTTngControlServiceConstants.COMMAND_LIST_KERNEL);
 239         ICommandResult result = executeCommand(command.toString(), monitor, false);
 240
 241         List<IBaseEventInfo> events = new ArrayList<IBaseEventInfo>();
 242
 243         if (result.getOutput() != null) {
 244             // Ignore the following 2 cases:
 245             // Spawning a session daemon
 246             // Error: Unable to list kernel events
 247             // or:
 248             // Error: Unable to list kernel events
 249             //
 250             int index = 0;
 251             while (index < result.getOutput().length) {
 252                 String line = result.getOutput()[index];
 253                 Matcher matcher = LTTngControlServiceConstants.LIST_KERNEL_NO_KERNEL_PROVIDER_PATTERN.matcher(line);
 254                 if (matcher.matches()) {
 255                     return events;
 256                 }
 257                 index++;
 258             }
 259         }
 260
 261         if (isError(result)) {
 262             throw new ExecutionException(Messages.TraceControl_CommandError + " " + command.toString() + "\n" + formatOutput(result)); //$NON-NLS-1$ //$NON-NLS-2$
 263         }
 264
 265         // Kernel events:
 266         // -------------
 267         // sched_kthread_stop (type: tracepoint)
 268         getProviderEventInfo(result.getOutput(), 0, events);
 269         return events;
 270     }
 271
 272     @Override
 273     public List<IUstProviderInfo> getUstProvider() throws ExecutionException {
 274         return getUstProvider(new NullProgressMonitor());
 275     }
 276
 277     @Override
 278     public List<IUstProviderInfo> getUstProvider(IProgressMonitor monitor) throws ExecutionException {
 279         StringBuffer command = createCommand(LTTngControlServiceConstants.COMMAND_LIST_UST);
 280
 281         if (isVersionSupported("2.1.0")) { //$NON-NLS-1$
 282             command.append(LTTngControlServiceConstants.OPTION_FIELDS);
 283         }
 284
 285         ICommandResult result = executeCommand(command.toString(), monitor, false);
 286         List<IUstProviderInfo> allProviders = new ArrayList<IUstProviderInfo>();
 287
 288         // Workaround for versions 2.0.x which causes a segmentation fault for this command
 289         // if LTTng Tools is compiled without UST support.
 290         if (!isVersionSupported("2.1.0") && (result.getResult() != 0)) { //$NON-NLS-1$
 291             return allProviders;
 292         }
 293
 294         if (result.getOutput() != null) {
 295             // Ignore the following 2 cases:
 296             // Spawning a session daemon
 297             // Error: Unable to list UST events: Listing UST events failed
 298             // or:
 299             // Error: Unable to list UST events: Listing UST events failed
 300             //
 301             int index = 0;
 302             while (index < result.getOutput().length) {
 303                 String line = result.getOutput()[index];
 304                 Matcher matcher = LTTngControlServiceConstants.LIST_UST_NO_UST_PROVIDER_PATTERN.matcher(line);
 305                 if (matcher.matches()) {
 306                     return allProviders;
 307                 }
 308                 index++;
 309             }
 310         }
 311
 312         if (isError(result)) {
 313             throw new ExecutionException(Messages.TraceControl_CommandError + " " + command.toString() + "\n" + formatOutput(result)); //$NON-NLS-1$ //$NON-NLS-2$
 314         }
 315
 316         // Note that field print-outs exists for version >= 2.1.0
 317         //
 318         // UST events:
 319         // -------------
 320         //
 321         // PID: 3635 - Name:
 322         // /home/user/git/lttng-ust/tests/hello.cxx/.libs/lt-hello
 323         // ust_tests_hello:tptest_sighandler (loglevel: TRACE_EMERG0) (type:
 324         // tracepoint)
 325         // ust_tests_hello:tptest (loglevel: TRACE_EMERG0) (type: tracepoint)
 326         //    field: doublefield (float)
 327         //    field: floatfield (float)
 328         //    field: stringfield (string)
 329         //
 330         // PID: 6459 - Name:
 331         // /home/user/git/lttng-ust/tests/hello.cxx/.libs/lt-hello
 332         // ust_tests_hello:tptest_sighandler (loglevel: TRACE_EMERG0) (type:
 333         // tracepoint)
 334         // ust_tests_hello:tptest (loglevel: TRACE_EMERG0) (type: tracepoint)
 335         //    field: doublefield (float)
 336         //    field: floatfield (float)
 337         //    field: stringfield (string)
 338
 339         IUstProviderInfo provider = null;
 340
 341         int index = 0;
 342         while (index < result.getOutput().length) {
 343             String line = result.getOutput()[index];
 344             Matcher matcher = LTTngControlServiceConstants.UST_PROVIDER_PATTERN.matcher(line);
 345             if (matcher.matches()) {
 346                 provider = new UstProviderInfo(matcher.group(2).trim());
 347                 provider.setPid(Integer.valueOf(matcher.group(1).trim()));
 348                 List<IBaseEventInfo> events = new ArrayList<IBaseEventInfo>();
 349                 index = getProviderEventInfo(result.getOutput(), ++index, events);
 350                 provider.setEvents(events);
 351                 allProviders.add(provider);
 352             } else {
 353                 index++;
 354             }
 355         }
 356         return allProviders;
 357     }
 358
 359     @Override
 360     public ISessionInfo createSession(String sessionName, String sessionPath, IProgressMonitor monitor) throws ExecutionException {
 361
 362         String newName = formatParameter(sessionName);
 363         String newPath = formatParameter(sessionPath);
 364
 365         StringBuffer command = createCommand(LTTngControlServiceConstants.COMMAND_CREATE_SESSION, newName);
 366
 367         if (newPath != null && !"".equals(newPath)) { //$NON-NLS-1$
 368             command.append(LTTngControlServiceConstants.OPTION_OUTPUT_PATH);
 369             command.append(newPath);
 370         }
 371
 372         ICommandResult result = executeCommand(command.toString(), monitor);
 373
 374         //Session myssession2 created.
 375         //Traces will be written in /home/user/lttng-traces/myssession2-20120209-095418
 376         String[] output = result.getOutput();
 377
 378         // Get and session name and path
 379         String name = null;
 380         String path = null;
 381
 382         int index = 0;
 383         while (index < output.length) {
 384             String line = output[index];
 385             Matcher nameMatcher = LTTngControlServiceConstants.CREATE_SESSION_NAME_PATTERN.matcher(line);
 386             Matcher pathMatcher = LTTngControlServiceConstants.CREATE_SESSION_PATH_PATTERN.matcher(line);
 387             if (nameMatcher.matches()) {
 388                 name = String.valueOf(nameMatcher.group(1).trim());
 389             } else if (pathMatcher.matches()) {
 390                 path = String.valueOf(pathMatcher.group(1).trim());
 391             }
 392             index++;
 393         }
 394
 395         // Verify session name
 396         if ((name == null) || (!"".equals(sessionName) && !name.equals(sessionName))) { //$NON-NLS-1$
 397             // Unexpected name returned
 398             throw new ExecutionException(Messages.TraceControl_CommandError + " " + command + "\n" + //$NON-NLS-1$ //$NON-NLS-2$
 399                     Messages.TraceControl_UnexpectedNameError + ": " + name); //$NON-NLS-1$
 400         }
 401
 402         SessionInfo sessionInfo = new SessionInfo(name);
 403
 404         // Verify session path
 405         if ((path == null) || ((sessionPath != null) && (!path.contains(sessionPath)))) {
 406             // Unexpected path
 407             throw new ExecutionException(Messages.TraceControl_CommandError + " " + command + "\n" + //$NON-NLS-1$ //$NON-NLS-2$
 408                     Messages.TraceControl_UnexpectedPathError + ": " + name); //$NON-NLS-1$
 409         }
 410
 411         sessionInfo.setSessionPath(path);
 412
 413         return sessionInfo;
 414
 415     }
 416
 417     @Override
 418     public ISessionInfo createSession(String sessionName, String networkUrl, String controlUrl, String dataUrl, IProgressMonitor monitor) throws ExecutionException {
 419
 420         String newName = formatParameter(sessionName);
 421         StringBuffer command = createCommand(LTTngControlServiceConstants.COMMAND_CREATE_SESSION, newName);
 422
 423         if (networkUrl != null) {
 424             command.append(LTTngControlServiceConstants.OPTION_NETWORK_URL);
 425             command.append(networkUrl);
 426         } else {
 427             command.append(LTTngControlServiceConstants.OPTION_CONTROL_URL);
 428             command.append(controlUrl);
 429
 430             command.append(LTTngControlServiceConstants.OPTION_DATA_URL);
 431             command.append(dataUrl);
 432         }
 433
 434         ICommandResult result = executeCommand(command.toString(), monitor);
 435
 436         // Verify output
 437         String[] output = result.getOutput();
 438
 439         // Get and session name and path
 440         String name = null;
 441         String path = null;
 442
 443         int index = 0;
 444         while (index < output.length) {
 445             String line = output[index];
 446             Matcher nameMatcher = LTTngControlServiceConstants.CREATE_SESSION_NAME_PATTERN.matcher(line);
 447             Matcher pathMatcher = LTTngControlServiceConstants.CREATE_SESSION_PATH_PATTERN.matcher(line);
 448
 449             if (nameMatcher.matches()) {
 450                 name = String.valueOf(nameMatcher.group(1).trim());
 451             } else if (pathMatcher.matches() && (networkUrl != null)) {
 452                 path = String.valueOf(pathMatcher.group(1).trim());
 453             }
 454             index++;
 455         }
 456
 457         // Verify session name
 458         if ((name == null) || (!"".equals(sessionName) && !name.equals(sessionName))) { //$NON-NLS-1$
 459             // Unexpected name returned
 460             throw new ExecutionException(Messages.TraceControl_CommandError + " " + command + "\n" + //$NON-NLS-1$ //$NON-NLS-2$
 461                     Messages.TraceControl_UnexpectedNameError + ": " + name); //$NON-NLS-1$
 462         }
 463
 464         SessionInfo sessionInfo = new SessionInfo(name);
 465
 466         sessionInfo.setStreamedTrace(true);
 467
 468         // Verify session path
 469         if (networkUrl != null) {
 470             if (path == null) {
 471                 // Unexpected path
 472                 throw new ExecutionException(Messages.TraceControl_CommandError + " " + command + "\n" + //$NON-NLS-1$ //$NON-NLS-2$
 473                         Messages.TraceControl_UnexpectedPathError + ": " + name); //$NON-NLS-1$
 474             }
 475
 476             sessionInfo.setSessionPath(path);
 477
 478             // Check file protocol
 479             Matcher matcher = LTTngControlServiceConstants.TRACE_FILE_PROTOCOL_PATTERN.matcher(path);
 480             if (matcher.matches()) {
 481                 sessionInfo.setStreamedTrace(false);
 482             }
 483         }
 484         // When using controlUrl and dataUrl the full session path is not known yet
 485         // and will be set later on when listing the session
 486
 487         return sessionInfo;
 488     }
 489
 490     @Override
 491     public void destroySession(String sessionName, IProgressMonitor monitor) throws ExecutionException {
 492         String newName = formatParameter(sessionName);
 493
 494         StringBuffer command = createCommand(LTTngControlServiceConstants.COMMAND_DESTROY_SESSION, newName);
 495
 496         ICommandResult result = executeCommand(command.toString(), monitor, false);
 497         String[] output = result.getOutput();
 498
 499         boolean isError = isError(result);
 500         if (isError && (output != null)) {
 501             int index = 0;
 502             while (index < output.length) {
 503                 String line = output[index];
 504                 Matcher matcher = LTTngControlServiceConstants.SESSION_NOT_FOUND_ERROR_PATTERN.matcher(line);
 505                 if (matcher.matches()) {
 506                     // Don't treat this as an error
 507                     isError = false;
 508                 }
 509                 index++;
 510             }
 511         }
 512
 513         if (isError) {
 514             throw new ExecutionException(Messages.TraceControl_CommandError + " " + command.toString() + "\n" + formatOutput(result)); //$NON-NLS-1$ //$NON-NLS-2$
 515         }
 516
 517         //Session <sessionName> destroyed
 518     }
 519
 520     @Override
 521     public void startSession(String sessionName, IProgressMonitor monitor) throws ExecutionException {
 522
 523         String newSessionName = formatParameter(sessionName);
 524
 525         StringBuffer command = createCommand(LTTngControlServiceConstants.COMMAND_START_SESSION, newSessionName);
 526
 527         executeCommand(command.toString(), monitor);
 528
 529         //Session <sessionName> started
 530     }
 531
 532     @Override
 533     public void stopSession(String sessionName, IProgressMonitor monitor) throws ExecutionException {
 534         String newSessionName = formatParameter(sessionName);
 535         StringBuffer command = createCommand(LTTngControlServiceConstants.COMMAND_STOP_SESSION, newSessionName);
 536
 537         executeCommand(command.toString(), monitor);
 538
 539         //Session <sessionName> stopped
 540
 541     }
 542
 543     @Override
 544     public void enableChannels(String sessionName, List<String> channelNames, boolean isKernel, IChannelInfo info, IProgressMonitor monitor) throws ExecutionException {
 545
 546         // no channels to enable
 547         if (channelNames.isEmpty()) {
 548             return;
 549         }
 550
 551         StringBuffer command = createCommand(LTTngControlServiceConstants.COMMAND_ENABLE_CHANNEL);
 552
 553         for (Iterator<String> iterator = channelNames.iterator(); iterator.hasNext();) {
 554             String channel = iterator.next();
 555             command.append(channel);
 556             if (iterator.hasNext()) {
 557                 command.append(',');
 558             }
 559         }
 560
 561         if (isKernel) {
 562             command.append(LTTngControlServiceConstants.OPTION_KERNEL);
 563         } else {
 564             command.append(LTTngControlServiceConstants.OPTION_UST);
 565         }
 566
 567         String newSessionName = formatParameter(sessionName);
 568         command.append(LTTngControlServiceConstants.OPTION_SESSION);
 569         command.append(newSessionName);
 570
 571         if (info != null) {
 572 //            --discard            Discard event when buffers are full (default)
 573
 574 //            --overwrite          Flight recorder mode
 575             if (info.isOverwriteMode()) {
 576                 command.append(LTTngControlServiceConstants.OPTION_OVERWRITE);
 577             }
 578 //            --subbuf-size SIZE   Subbuffer size in bytes
 579 //                                     (default: 4096, kernel default: 262144)
 580             if (info.getSubBufferSize() != LTTngControlServiceConstants.UNUSED_VALUE) {
 581                 command.append(LTTngControlServiceConstants.OPTION_SUB_BUFFER_SIZE);
 582                 command.append(String.valueOf(info.getSubBufferSize()));
 583             }
 584
 585 //            --num-subbuf NUM     Number of subbufers
 586             if (info.getNumberOfSubBuffers() != LTTngControlServiceConstants.UNUSED_VALUE) {
 587                 command.append(LTTngControlServiceConstants.OPTION_NUM_SUB_BUFFERS);
 588                 command.append(String.valueOf(info.getNumberOfSubBuffers()));
 589             }
 590
 591 //            --switch-timer USEC  Switch timer interval in usec
 592             if (info.getSwitchTimer() != LTTngControlServiceConstants.UNUSED_VALUE) {
 593                 command.append(LTTngControlServiceConstants.OPTION_SWITCH_TIMER);
 594                 command.append(String.valueOf(info.getSwitchTimer()));
 595             }
 596
 597 //            --read-timer USEC    Read timer interval in usec
 598             if (info.getReadTimer() != LTTngControlServiceConstants.UNUSED_VALUE) {
 599                 command.append(LTTngControlServiceConstants.OPTION_READ_TIMER);
 600                 command.append(String.valueOf(info.getReadTimer()));
 601             }
 602
 603             if (isVersionSupported("2.2.0")) { //$NON-NLS-1$
 604 //                --buffer-uid  Every application sharing the same UID use the same buffers
 605                 if (!isKernel && info.isBuffersUID()) {
 606                     command.append(LTTngControlServiceConstants.OPTION_PER_UID_BUFFERS);
 607                 }
 608
 609 //                -C SIZE   Maximum size of trace files in bytes
 610                 if (info.getMaxSizeTraceFiles() != LTTngControlServiceConstants.UNUSED_VALUE) {
 611                     command.append(LTTngControlServiceConstants.OPTION_MAX_SIZE_TRACE_FILES);
 612                     command.append(String.valueOf(info.getMaxSizeTraceFiles()));
 613                 }
 614
 615 //                -W NUM   Maximum number of trace files
 616                 if (info.getMaxNumberTraceFiles() != LTTngControlServiceConstants.UNUSED_VALUE) {
 617                     command.append(LTTngControlServiceConstants.OPTION_MAX_TRACE_FILES);
 618                     command.append(String.valueOf(info.getMaxNumberTraceFiles()));
 619                 }
 620             }
 621         }
 622
 623         executeCommand(command.toString(), monitor);
 624
 625     }
 626
 627     @Override
 628     public void disableChannels(String sessionName, List<String> channelNames, boolean isKernel, IProgressMonitor monitor) throws ExecutionException {
 629
 630         // no channels to enable
 631         if (channelNames.isEmpty()) {
 632             return;
 633         }
 634
 635         StringBuffer command = createCommand(LTTngControlServiceConstants.COMMAND_DISABLE_CHANNEL);
 636
 637         for (Iterator<String> iterator = channelNames.iterator(); iterator.hasNext();) {
 638             String channel = iterator.next();
 639             command.append(channel);
 640             if (iterator.hasNext()) {
 641                 command.append(',');
 642             }
 643         }
 644
 645         if (isKernel) {
 646             command.append(LTTngControlServiceConstants.OPTION_KERNEL);
 647         } else {
 648             command.append(LTTngControlServiceConstants.OPTION_UST);
 649         }
 650
 651         String newSessionName = formatParameter(sessionName);
 652         command.append(LTTngControlServiceConstants.OPTION_SESSION);
 653         command.append(newSessionName);
 654
 655         executeCommand(command.toString(), monitor);
 656     }
 657
 658     @Override
 659     public void enableEvents(String sessionName, String channelName, List<String> eventNames, boolean isKernel, String filterExpression, IProgressMonitor monitor) throws ExecutionException {
 660
 661         StringBuffer command = createCommand(LTTngControlServiceConstants.COMMAND_ENABLE_EVENT);
 662
 663         if (eventNames == null || eventNames.isEmpty()) {
 664             command.append(LTTngControlServiceConstants.OPTION_ALL);
 665         } else {
 666
 667             StringBuffer eventNameParameter = new StringBuffer();
 668             for (Iterator<String> iterator = eventNames.iterator(); iterator.hasNext();) {
 669                 String event = iterator.next();
 670                 eventNameParameter.append(event);
 671                 if (iterator.hasNext()) {
 672                     eventNameParameter.append(',');
 673                 }
 674             }
 675             command.append(formatParameter(eventNameParameter.toString()));
 676         }
 677
 678         if (isKernel) {
 679             command.append(LTTngControlServiceConstants.OPTION_KERNEL);
 680         } else {
 681             command.append(LTTngControlServiceConstants.OPTION_UST);
 682         }
 683
 684         String newSessionName = formatParameter(sessionName);
 685
 686         command.append(LTTngControlServiceConstants.OPTION_SESSION);
 687         command.append(newSessionName);
 688
 689         if (channelName != null) {
 690             command.append(LTTngControlServiceConstants.OPTION_CHANNEL);
 691             command.append(channelName);
 692         }
 693
 694         command.append(LTTngControlServiceConstants.OPTION_TRACEPOINT);
 695
 696         if (filterExpression != null) {
 697             command.append(LTTngControlServiceConstants.OPTION_FILTER);
 698             command.append('\'');
 699             command.append(filterExpression);
 700             command.append('\'');
 701         }
 702
 703         executeCommand(command.toString(), monitor);
 704
 705     }
 706
 707     @Override
 708     public void enableSyscalls(String sessionName, String channelName, IProgressMonitor monitor) throws ExecutionException {
 709
 710         StringBuffer command = createCommand(LTTngControlServiceConstants.COMMAND_ENABLE_EVENT);
 711
 712         command.append(LTTngControlServiceConstants.OPTION_ALL);
 713         command.append(LTTngControlServiceConstants.OPTION_KERNEL);
 714
 715         String newSessionName = formatParameter(sessionName);
 716
 717         command.append(LTTngControlServiceConstants.OPTION_SESSION);
 718         command.append(newSessionName);
 719
 720         if (channelName != null) {
 721             command.append(LTTngControlServiceConstants.OPTION_CHANNEL);
 722             command.append(channelName);
 723         }
 724
 725         command.append(LTTngControlServiceConstants.OPTION_SYSCALL);
 726
 727         executeCommand(command.toString(), monitor);
 728     }
 729
 730     @Override
 731     public void enableProbe(String sessionName, String channelName, String eventName, boolean isFunction, String probe, IProgressMonitor monitor) throws ExecutionException {
 732         StringBuffer command = createCommand(LTTngControlServiceConstants.COMMAND_ENABLE_EVENT);
 733
 734         command.append(eventName);
 735         command.append(LTTngControlServiceConstants.OPTION_KERNEL);
 736
 737         String newSessionName = formatParameter(sessionName);
 738         command.append(LTTngControlServiceConstants.OPTION_SESSION);
 739         command.append(newSessionName);
 740
 741         if (channelName != null) {
 742             command.append(LTTngControlServiceConstants.OPTION_CHANNEL);
 743             command.append(channelName);
 744         }
 745         if (isFunction) {
 746             command.append(LTTngControlServiceConstants.OPTION_FUNCTION_PROBE);
 747         } else {
 748             command.append(LTTngControlServiceConstants.OPTION_PROBE);
 749         }
 750
 751         command.append(probe);
 752
 753         executeCommand(command.toString(), monitor);
 754     }
 755
 756     @Override
 757     public void enableLogLevel(String sessionName, String channelName, String eventName, LogLevelType logLevelType, TraceLogLevel level, String filterExpression, IProgressMonitor monitor) throws ExecutionException {
 758         StringBuffer command = createCommand(LTTngControlServiceConstants.COMMAND_ENABLE_EVENT);
 759
 760         command.append(eventName);
 761         command.append(LTTngControlServiceConstants.OPTION_UST);
 762
 763         String newSessionName = formatParameter(sessionName);
 764         command.append(LTTngControlServiceConstants.OPTION_SESSION);
 765         command.append(newSessionName);
 766
 767         if (channelName != null) {
 768             command.append(LTTngControlServiceConstants.OPTION_CHANNEL);
 769             command.append(channelName);
 770         }
 771
 772         if (logLevelType == LogLevelType.LOGLEVEL) {
 773             command.append(LTTngControlServiceConstants.OPTION_LOGLEVEL);
 774         } else if (logLevelType == LogLevelType.LOGLEVEL_ONLY) {
 775             command.append(LTTngControlServiceConstants.OPTION_LOGLEVEL_ONLY);
 776
 777         } else {
 778             return;
 779         }
 780         command.append(level.getInName());
 781
 782         executeCommand(command.toString(), monitor);
 783     }
 784
 785     @Override
 786     public void disableEvent(String sessionName, String channelName, List<String> eventNames, boolean isKernel, IProgressMonitor monitor) throws ExecutionException {
 787         StringBuffer command = createCommand(LTTngControlServiceConstants.COMMAND_DISABLE_EVENT);
 788
 789         if (eventNames == null) {
 790             command.append(LTTngControlServiceConstants.OPTION_ALL);
 791         } else {
 792             // no events to disable
 793             if (eventNames.isEmpty()) {
 794                 return;
 795             }
 796
 797             StringBuffer eventNameParameter = new StringBuffer();
 798             for (Iterator<String> iterator = eventNames.iterator(); iterator.hasNext();) {
 799                 String event = iterator.next();
 800                 eventNameParameter.append(event);
 801                 if (iterator.hasNext()) {
 802                     eventNameParameter.append(',');
 803                 }
 804             }
 805             command.append(formatParameter(eventNameParameter.toString()));
 806         }
 807
 808         if (isKernel) {
 809             command.append(LTTngControlServiceConstants.OPTION_KERNEL);
 810         } else {
 811             command.append(LTTngControlServiceConstants.OPTION_UST);
 812         }
 813
 814         String newSessionName = formatParameter(sessionName);
 815         command.append(LTTngControlServiceConstants.OPTION_SESSION);
 816         command.append(newSessionName);
 817
 818         if (channelName != null) {
 819             command.append(LTTngControlServiceConstants.OPTION_CHANNEL);
 820             command.append(channelName);
 821         }
 822
 823         executeCommand(command.toString(), monitor);
 824     }
 825
 826     @Override
 827     public List<String> getContextList(IProgressMonitor monitor) throws ExecutionException {
 828
 829         StringBuffer command = createCommand(LTTngControlServiceConstants.COMMAND_ADD_CONTEXT, LTTngControlServiceConstants.OPTION_HELP);
 830
 831         ICommandResult result = executeCommand(command.toString(), monitor);
 832
 833         String[] output = result.getOutput();
 834
 835         List<String> contexts = new ArrayList<String>(0);
 836
 837         int index = 0;
 838         boolean inList = false;
 839         while (index < output.length) {
 840             String line = result.getOutput()[index];
 841
 842             Matcher startMatcher = LTTngControlServiceConstants.ADD_CONTEXT_HELP_CONTEXTS_INTRO.matcher(line);
 843             Matcher endMatcher = LTTngControlServiceConstants.ADD_CONTEXT_HELP_CONTEXTS_END_LINE.matcher(line);
 844
 845             if (startMatcher.matches()) {
 846                 inList = true;
 847             } else if (endMatcher.matches()) {
 848                 break;
 849             } else if (inList == true) {
 850                 String[] tmp = line.split(","); //$NON-NLS-1$
 851                 for (int i = 0; i < tmp.length; i++) {
 852                     contexts.add(tmp[i].trim());
 853                 }
 854             }
 855             index++;
 856         }
 857         return contexts;
 858     }
 859
 860     @Override
 861     public void addContexts(String sessionName, String channelName, String eventName, boolean isKernel, List<String> contextNames, IProgressMonitor monitor) throws ExecutionException {
 862         StringBuffer command = createCommand(LTTngControlServiceConstants.COMMAND_ADD_CONTEXT);
 863
 864         String newSessionName = formatParameter(sessionName);
 865         command.append(LTTngControlServiceConstants.OPTION_SESSION);
 866         command.append(newSessionName);
 867
 868         if (channelName != null) {
 869             command.append(LTTngControlServiceConstants.OPTION_CHANNEL);
 870             command.append(channelName);
 871         }
 872
 873         if (eventName != null) {
 874             command.append(LTTngControlServiceConstants.OPTION_EVENT);
 875             command.append(eventName);
 876         }
 877
 878         if (isKernel) {
 879             command.append(LTTngControlServiceConstants.OPTION_KERNEL);
 880         } else {
 881             command.append(LTTngControlServiceConstants.OPTION_UST);
 882         }
 883
 884         for (Iterator<String> iterator = contextNames.iterator(); iterator.hasNext();) {
 885             String context = iterator.next();
 886             command.append(LTTngControlServiceConstants.OPTION_CONTEXT_TYPE);
 887             command.append(context);
 888         }
 889
 890         executeCommand(command.toString(), monitor);
 891
 892     }
 893
 894     @Override
 895     public void calibrate(boolean isKernel, IProgressMonitor monitor) throws ExecutionException {
 896         StringBuffer command = createCommand(LTTngControlServiceConstants.COMMAND_CALIBRATE);
 897
 898         if (isKernel) {
 899             command.append(LTTngControlServiceConstants.OPTION_KERNEL);
 900         } else {
 901             command.append(LTTngControlServiceConstants.OPTION_UST);
 902         }
 903
 904         command.append(LTTngControlServiceConstants.OPTION_FUNCTION_PROBE);
 905
 906         executeCommand(command.toString(), monitor);
 907     }
 908
 909     // ------------------------------------------------------------------------
 910     // Helper methods
 911     // ------------------------------------------------------------------------
 912
 913     /**
 914      * Checks if command result is an error result.
 915      *
 916      * @param result
 917      *            - the command result to check
 918      * @return true if error else false
 919      */
 920     protected boolean isError(ICommandResult result) {
 921         // Check return code and length of returned strings
 922         if ((result.getResult()) != 0 || (result.getOutput().length < 1)) {
 923             return true;
 924         }
 925
 926         // Look for error pattern
 927         int index = 0;
 928         while (index < result.getOutput().length) {
 929             String line = result.getOutput()[index];
 930             Matcher matcher = LTTngControlServiceConstants.ERROR_PATTERN.matcher(line);
 931             if (matcher.matches()) {
 932                 return true;
 933             }
 934             index++;
 935         }
 936
 937         return false;
 938     }
 939
 940     /**
 941      * Formats the output string as single string.
 942      *
 943      * @param result
 944      *            - output array
 945      * @return - the formatted output
 946      */
 947     public static String formatOutput(ICommandResult result) {
 948         if ((result == null) || result.getOutput() == null || result.getOutput().length == 0) {
 949             return ""; //$NON-NLS-1$
 950         }
 951         String[] output = result.getOutput();
 952         StringBuffer ret = new StringBuffer();
 953         ret.append("Return Value: "); //$NON-NLS-1$
 954         ret.append(result.getResult());
 955         ret.append("\n"); //$NON-NLS-1$
 956         for (int i = 0; i < output.length; i++) {
 957             ret.append(output[i]).append("\n"); //$NON-NLS-1$
 958         }
 959         return ret.toString();
 960     }
 961
 962     /**
 963      * Parses the domain information.
 964      *
 965      * @param output
 966      *            - a command output array
 967      * @param currentIndex
 968      *            - current index in command output array
 969      * @param channels
 970      *            - list for returning channel information
 971      * @param domainInfo
 972      *            - The domain information
 973      * @return the new current index in command output array
 974      */
 975     protected int parseDomain(String[] output, int currentIndex, List<IChannelInfo> channels, IDomainInfo domainInfo) {
 976         int index = currentIndex;
 977
 978         // Channels:
 979         // -------------
 980         // - channnel1: [enabled]
 981         //
 982         // Attributes:
 983         // overwrite mode: 0
 984         // subbufers size: 262144
 985         // number of subbufers: 4
 986         // switch timer interval: 0
 987         // read timer interval: 200
 988         // output: splice()
 989
 990         while (index < output.length) {
 991             String line = output[index];
 992
 993             if (isVersionSupported("2.2.0")) { //$NON-NLS-1$
 994                 Matcher bufferTypeMatcher = LTTngControlServiceConstants.BUFFER_TYPE_PATTERN.matcher(line);
 995                 if (bufferTypeMatcher.matches()) {
 996                     domainInfo.setBufferType(getAttributeValue(line));
 997                 }
 998             } else {
 999                 domainInfo.setBufferType(BufferTypeConstants.BUFFER_TYPE_UNKNOWN);
1000             }
1001             Matcher outerMatcher = LTTngControlServiceConstants.CHANNELS_SECTION_PATTERN.matcher(line);
1002             Matcher noKernelChannelMatcher = LTTngControlServiceConstants.DOMAIN_NO_KERNEL_CHANNEL_PATTERN.matcher(line);
1003             Matcher noUstChannelMatcher = LTTngControlServiceConstants.DOMAIN_NO_UST_CHANNEL_PATTERN.matcher(line);
1004             if (outerMatcher.matches()) {
1005                 IChannelInfo channelInfo = null;
1006                 while (index < output.length) {
1007                     String subLine = output[index];
1008
1009                     Matcher innerMatcher = LTTngControlServiceConstants.CHANNEL_PATTERN.matcher(subLine);
1010                     if (innerMatcher.matches()) {
1011                         channelInfo = new ChannelInfo(""); //$NON-NLS-1$
1012                         // get channel name
1013                         channelInfo.setName(innerMatcher.group(1));
1014
1015                         // get channel enablement
1016                         channelInfo.setState(innerMatcher.group(2));
1017
1018                         // add channel
1019                         channels.add(channelInfo);
1020
1021                     } else if (LTTngControlServiceConstants.OVERWRITE_MODE_ATTRIBUTE.matcher(subLine).matches()) {
1022                         String value = getAttributeValue(subLine);
1023                         if (channelInfo != null) {
1024                             channelInfo.setOverwriteMode(!LTTngControlServiceConstants.OVERWRITE_MODE_ATTRIBUTE_FALSE.equals(value));
1025                         }
1026                     } else if (LTTngControlServiceConstants.SUBBUFFER_SIZE_ATTRIBUTE.matcher(subLine).matches()) {
1027                         if (channelInfo != null) {
1028                             channelInfo.setSubBufferSize(Long.valueOf(getAttributeValue(subLine)));
1029                         }
1030
1031                     } else if (LTTngControlServiceConstants.NUM_SUBBUFFERS_ATTRIBUTE.matcher(subLine).matches()) {
1032                         if (channelInfo != null) {
1033                             channelInfo.setNumberOfSubBuffers(Integer.valueOf(getAttributeValue(subLine)));
1034                         }
1035
1036                     } else if (LTTngControlServiceConstants.SWITCH_TIMER_ATTRIBUTE.matcher(subLine).matches()) {
1037                         if (channelInfo != null) {
1038                             channelInfo.setSwitchTimer(Long.valueOf(getAttributeValue(subLine)));
1039                         }
1040
1041                     } else if (LTTngControlServiceConstants.READ_TIMER_ATTRIBUTE.matcher(subLine).matches()) {
1042                         if (channelInfo != null) {
1043                             channelInfo.setReadTimer(Long.valueOf(getAttributeValue(subLine)));
1044                         }
1045
1046                     } else if (LTTngControlServiceConstants.OUTPUT_ATTRIBUTE.matcher(subLine).matches()) {
1047                         if (channelInfo != null) {
1048                             channelInfo.setOutputType(getAttributeValue(subLine));
1049                         }
1050
1051                     } else if (LTTngControlServiceConstants.EVENT_SECTION_PATTERN.matcher(subLine).matches()) {
1052                         List<IEventInfo> events = new ArrayList<IEventInfo>();
1053                         index = parseEvents(output, index, events);
1054                         if (channelInfo != null) {
1055                             channelInfo.setEvents(events);
1056                         }
1057                         // we want to stay at the current index to be able to
1058                         // exit the domain
1059                         continue;
1060                     } else if (LTTngControlServiceConstants.DOMAIN_KERNEL_PATTERN.matcher(subLine).matches()) {
1061                         return index;
1062
1063                     } else if (LTTngControlServiceConstants.DOMAIN_UST_GLOBAL_PATTERN.matcher(subLine).matches()) {
1064                         return index;
1065                     }
1066                     index++;
1067                 }
1068             } else if (noKernelChannelMatcher.matches() || noUstChannelMatcher.matches()) {
1069                 // domain indicates that no channels were found -> return
1070                 index++;
1071                 return index;
1072             }
1073             index++;
1074         }
1075         return index;
1076     }
1077
1078     /**
1079      * Parses the event information within a domain.
1080      *
1081      * @param output
1082      *            - a command output array
1083      * @param currentIndex
1084      *            - current index in command output array
1085      * @param events
1086      *            - list for returning event information
1087      * @return the new current index in command output array
1088      */
1089     protected int parseEvents(String[] output, int currentIndex, List<IEventInfo> events) {
1090         int index = currentIndex;
1091
1092         while (index < output.length) {
1093             String line = output[index];
1094             if (LTTngControlServiceConstants.CHANNEL_PATTERN.matcher(line).matches()) {
1095                 // end of channel
1096                 return index;
1097             } else if (LTTngControlServiceConstants.DOMAIN_KERNEL_PATTERN.matcher(line).matches()) {
1098                 // end of domain
1099                 return index;
1100             } else if (LTTngControlServiceConstants.DOMAIN_UST_GLOBAL_PATTERN.matcher(line).matches()) {
1101                 // end of domain
1102                 return index;
1103             }
1104
1105             Matcher matcher = LTTngControlServiceConstants.EVENT_PATTERN.matcher(line);
1106             Matcher matcher2 = LTTngControlServiceConstants.WILDCARD_EVENT_PATTERN.matcher(line);
1107
1108             if (matcher.matches()) {
1109                 IEventInfo eventInfo = new EventInfo(matcher.group(1).trim());
1110                 eventInfo.setLogLevel(matcher.group(2).trim());
1111                 eventInfo.setEventType(matcher.group(3).trim());
1112                 eventInfo.setState(matcher.group(4));
1113                 String filter = matcher.group(5);
1114                 if (filter != null) {
1115                     filter = filter.substring(1, filter.length() - 1); // remove '[' and ']'
1116                     eventInfo.setFilterExpression(filter);
1117                 }
1118                 events.add(eventInfo);
1119                 index++;
1120             } else if (matcher2.matches()) {
1121                 IEventInfo eventInfo = new EventInfo(matcher2.group(1).trim());
1122                 eventInfo.setLogLevel(TraceLogLevel.LEVEL_UNKNOWN);
1123                 eventInfo.setEventType(matcher2.group(2).trim());
1124                 eventInfo.setState(matcher2.group(3));
1125                 String filter = matcher2.group(4);
1126                 if (filter != null) {
1127                     filter = filter.substring(1, filter.length() - 1); // remove '[' and ']'
1128                     eventInfo.setFilterExpression(filter);
1129                 }
1130
1131                 if (eventInfo.getEventType() == TraceEventType.PROBE) {
1132                     IProbeEventInfo probeEvent = new ProbeEventInfo(eventInfo.getName());
1133                     probeEvent.setLogLevel(eventInfo.getLogLevel());
1134                     probeEvent.setEventType(eventInfo.getEventType());
1135                     probeEvent.setState(eventInfo.getState());
1136
1137                     // Overwrite eventinfo
1138                     eventInfo = probeEvent;
1139
1140                     // myevent2 (type: probe) [enabled]
1141                     // addr: 0xc0101340
1142                     // myevent0 (type: probe) [enabled]
1143                     // offset: 0x0
1144                     // symbol: init_post
1145                     index++;
1146                     while (index < output.length) {
1147                         String probeLine = output[index];
1148                         // parse probe
1149                         Matcher addrMatcher = LTTngControlServiceConstants.PROBE_ADDRESS_PATTERN.matcher(probeLine);
1150                         Matcher offsetMatcher = LTTngControlServiceConstants.PROBE_OFFSET_PATTERN.matcher(probeLine);
1151                         Matcher symbolMatcher = LTTngControlServiceConstants.PROBE_SYMBOL_PATTERN.matcher(probeLine);
1152                         if (addrMatcher.matches()) {
1153                             String addr = addrMatcher.group(2).trim();
1154                             probeEvent.setAddress(addr);
1155                         } else if (offsetMatcher.matches()) {
1156                             String offset = offsetMatcher.group(2).trim();
1157                             probeEvent.setOffset(offset);
1158                         } else if (symbolMatcher.matches()) {
1159                             String symbol = symbolMatcher.group(2).trim();
1160                             probeEvent.setSymbol(symbol);
1161                         } else if ((LTTngControlServiceConstants.EVENT_PATTERN.matcher(probeLine).matches()) || (LTTngControlServiceConstants.WILDCARD_EVENT_PATTERN.matcher(probeLine).matches())) {
1162                             break;
1163                         } else if (LTTngControlServiceConstants.CHANNEL_PATTERN.matcher(probeLine).matches()) {
1164                             break;
1165                         } else if (LTTngControlServiceConstants.DOMAIN_KERNEL_PATTERN.matcher(probeLine).matches()) {
1166                             // end of domain
1167                             break;
1168                         } else if (LTTngControlServiceConstants.DOMAIN_UST_GLOBAL_PATTERN.matcher(probeLine).matches()) {
1169                             // end of domain
1170                             break;
1171                         }
1172                         index++;
1173                     }
1174                     events.add(eventInfo);
1175                 } else {
1176                     events.add(eventInfo);
1177                     index++;
1178                     continue;
1179                 }
1180             } else {
1181                 index++;
1182             }
1183         }
1184
1185         return index;
1186     }
1187
1188     /**
1189      * Parses a line with attributes: <attribute Name>: <attribute value>
1190      *
1191      * @param line
1192      *            - attribute line to parse
1193      * @return the attribute value as string
1194      */
1195     protected String getAttributeValue(String line) {
1196         String[] temp = line.split("\\: "); //$NON-NLS-1$
1197         return temp[1];
1198     }
1199
1200     /**
1201      * Parses the event information within a provider.
1202      *
1203      * @param output
1204      *            - a command output array
1205      * @param currentIndex
1206      *            - current index in command output array
1207      * @param events
1208      *            - list for returning event information
1209      * @return the new current index in command output array
1210      */
1211     protected int getProviderEventInfo(String[] output, int currentIndex, List<IBaseEventInfo> events) {
1212         int index = currentIndex;
1213         IBaseEventInfo eventInfo = null;
1214         while (index < output.length) {
1215             String line = output[index];
1216             Matcher matcher = LTTngControlServiceConstants.PROVIDER_EVENT_PATTERN.matcher(line);
1217             if (matcher.matches()) {
1218                 // sched_kthread_stop (loglevel: TRACE_EMERG0) (type: tracepoint)
1219                 eventInfo = new BaseEventInfo(matcher.group(1).trim());
1220                 eventInfo.setLogLevel(matcher.group(2).trim());
1221                 eventInfo.setEventType(matcher.group(3).trim());
1222                 events.add(eventInfo);
1223                 index++;
1224             } else if (LTTngControlServiceConstants.EVENT_FIELD_PATTERN.matcher(line).matches()) {
1225                 if (eventInfo != null) {
1226                     List<IFieldInfo> fields = new ArrayList<IFieldInfo>();
1227                     index = getFieldInfo(output, index, fields);
1228                     eventInfo.setFields(fields);
1229                 } else {
1230                     index++;
1231                 }
1232             }
1233             else if (LTTngControlServiceConstants.UST_PROVIDER_PATTERN.matcher(line).matches()) {
1234                 return index;
1235             } else {
1236                 index++;
1237             }
1238         }
1239         return index;
1240     }
1241
1242
1243     /**
1244      * Parse a field's information.
1245      *
1246      * @param output
1247      *            A command output array
1248      * @param currentIndex
1249      *            The current index in the command output array
1250      * @param fields
1251      *            List for returning the field information
1252      * @return The new current index in the command output array
1253      */
1254     protected int getFieldInfo(String[] output, int currentIndex, List<IFieldInfo> fields) {
1255         int index = currentIndex;
1256         IFieldInfo fieldInfo = null;
1257         while (index < output.length) {
1258             String line = output[index];
1259             Matcher matcher = LTTngControlServiceConstants.EVENT_FIELD_PATTERN.matcher(line);
1260             if (matcher.matches()) {
1261                 // field: content (string)
1262                 fieldInfo = new FieldInfo(matcher.group(2).trim());
1263                 fieldInfo.setFieldType(matcher.group(3).trim());
1264                 fields.add(fieldInfo);
1265             } else if (LTTngControlServiceConstants.PROVIDER_EVENT_PATTERN.matcher(line).matches()) {
1266                 return index;
1267             } else if (LTTngControlServiceConstants.UST_PROVIDER_PATTERN.matcher(line).matches()) {
1268                 return index;
1269             }
1270             index++;
1271         }
1272         return index;
1273     }
1274
1275     /**
1276      * Formats a command parameter for the command execution i.e. adds quotes
1277      * at the beginning and end if necessary.
1278      * @param parameter - parameter to format
1279      * @return formated parameter
1280      */
1281     protected String formatParameter(String parameter) {
1282         if (parameter != null) {
1283             StringBuffer newString = new StringBuffer();
1284             newString.append(parameter);
1285
1286             if (parameter.contains(" ") || parameter.contains("*")) { //$NON-NLS-1$ //$NON-NLS-2$
1287                 newString.insert(0, "\""); //$NON-NLS-1$
1288                 newString.append("\""); //$NON-NLS-1$
1289             }
1290             return newString.toString();
1291         }
1292         return null;
1293     }
1294
1295     /**
1296      * @param strings array of string that makes up a command line
1297      * @return string buffer with created command line
1298      */
1299     protected StringBuffer createCommand(String... strings) {
1300         StringBuffer command = new StringBuffer();
1301         command.append(LTTngControlServiceConstants.CONTROL_COMMAND);
1302         command.append(getTracingGroupOption());
1303         command.append(getVerboseOption());
1304         for (String string : strings) {
1305             command.append(string);
1306         }
1307         return command;
1308     }
1309
1310     /**
1311      * @return the tracing group option if configured in the preferences
1312      */
1313     protected String getTracingGroupOption() {
1314         if (!ControlPreferences.getInstance().isDefaultTracingGroup() && !ControlPreferences.getInstance().getTracingGroup().equals("")) { //$NON-NLS-1$
1315             return LTTngControlServiceConstants.OPTION_TRACING_GROUP + ControlPreferences.getInstance().getTracingGroup();
1316         }
1317         return ""; //$NON-NLS-1$
1318     }
1319
1320     /**
1321      * @return the verbose option as configured in the preferences
1322      */
1323     protected String getVerboseOption() {
1324         if (ControlPreferences.getInstance().isLoggingEnabled()) {
1325             String level = ControlPreferences.getInstance().getVerboseLevel();
1326             if (ControlPreferences.TRACE_CONTROL_VERBOSE_LEVEL_VERBOSE.equals(level)) {
1327                 return LTTngControlServiceConstants.OPTION_VERBOSE;
1328             }
1329             if (ControlPreferences.TRACE_CONTROL_VERBOSE_LEVEL_V_VERBOSE.equals(level)) {
1330                 return LTTngControlServiceConstants.OPTION_VERY_VERBOSE;
1331             }
1332             if (ControlPreferences.TRACE_CONTROL_VERBOSE_LEVEL_V_V_VERBOSE.equals(level)) {
1333                 return LTTngControlServiceConstants.OPTION_VERY_VERY_VERBOSE;
1334             }
1335         }
1336         return ""; //$NON-NLS-1$
1337     }
1338
1339     /**
1340      * Method that logs the command and command result if logging is enabled as
1341      * well as forwards the command execution to the shell.
1342      *
1343      * @param command
1344      *            - the command to execute
1345      * @param monitor
1346      *            - a progress monitor
1347      * @return the command result
1348      * @throws ExecutionException
1349      *             If the command fails
1350      */
1351     protected ICommandResult executeCommand(String command,
1352             IProgressMonitor monitor) throws ExecutionException {
1353         return executeCommand(command, monitor, true);
1354     }
1355
1356     /**
1357      * Method that logs the command and command result if logging is enabled as
1358      * well as forwards the command execution to the shell.
1359      *
1360      * @param command
1361      *            - the command to execute
1362      * @param monitor
1363      *            - a progress monitor
1364      * @param checkForError
1365      *            - true to verify command result, else false
1366      * @return the command result
1367      * @throws ExecutionException
1368      *             in case of error result
1369      */
1370     protected ICommandResult executeCommand(String command,
1371             IProgressMonitor monitor, boolean checkForError)
1372             throws ExecutionException {
1373         if (ControlPreferences.getInstance().isLoggingEnabled()) {
1374             ControlCommandLogger.log(command);
1375         }
1376
1377         ICommandResult result = fCommandShell.executeCommand(
1378                 command.toString(), monitor);
1379
1380         if (ControlPreferences.getInstance().isLoggingEnabled()) {
1381             ControlCommandLogger.log(formatOutput(result));
1382         }
1383
1384         if (checkForError && isError(result)) {
1385             throw new ExecutionException(Messages.TraceControl_CommandError
1386                     + " " + command.toString() + "\n" + formatOutput(result)); //$NON-NLS-1$ //$NON-NLS-2$
1387         }
1388
1389         return result;
1390     }
1391 }