org.eclipse.linuxtools.lttng.ui/src/org/eclipse/linuxtools/lttng/ui/views/control/handlers/AssignEventHandler.java

   1 /**********************************************************************
   2  * Copyright (c) 2012 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  **********************************************************************/
  12 package org.eclipse.linuxtools.lttng.ui.views.control.handlers;
  13
  14 import java.util.ArrayList;
  15 import java.util.Iterator;
  16 import java.util.List;
  17
  18 import org.eclipse.core.commands.ExecutionEvent;
  19 import org.eclipse.core.commands.ExecutionException;
  20 import org.eclipse.core.runtime.IProgressMonitor;
  21 import org.eclipse.core.runtime.IStatus;
  22 import org.eclipse.core.runtime.Status;
  23 import org.eclipse.core.runtime.jobs.Job;
  24 import org.eclipse.jface.viewers.ISelection;
  25 import org.eclipse.jface.viewers.StructuredSelection;
  26 import org.eclipse.jface.window.Window;
  27 import org.eclipse.linuxtools.lttng.ui.LTTngUiPlugin;
  28 import org.eclipse.linuxtools.lttng.ui.views.control.ControlView;
  29 import org.eclipse.linuxtools.lttng.ui.views.control.Messages;
  30 import org.eclipse.linuxtools.lttng.ui.views.control.dialogs.IGetEventInfoDialog;
  31 import org.eclipse.linuxtools.lttng.ui.views.control.dialogs.TraceControlDialogFactory;
  32 import org.eclipse.linuxtools.lttng.ui.views.control.model.ITraceControlComponent;
  33 import org.eclipse.linuxtools.lttng.ui.views.control.model.impl.BaseEventComponent;
  34 import org.eclipse.linuxtools.lttng.ui.views.control.model.impl.KernelProviderComponent;
  35 import org.eclipse.linuxtools.lttng.ui.views.control.model.impl.TargetNodeComponent;
  36 import org.eclipse.linuxtools.lttng.ui.views.control.model.impl.TraceChannelComponent;
  37 import org.eclipse.linuxtools.lttng.ui.views.control.model.impl.TraceSessionComponent;
  38 import org.eclipse.linuxtools.lttng.ui.views.control.model.impl.UstProviderComponent;
  39 import org.eclipse.ui.IWorkbenchPage;
  40
  41 /**
  42  * <b><u>EnableEventHandler</u></b>
  43  * <p>
  44  * Command handler implementation to assign events to a session and channel and enable/configure them.
  45  * This is done on the trace provider level.
  46  * </p>
  47  */
  48 public class AssignEventHandler extends BaseControlViewHandler {
  49
  50     // ------------------------------------------------------------------------
  51     // Attributes
  52     // ------------------------------------------------------------------------
  53     /**
  54      * The list of event components the command is to be executed on.
  55      */
  56     private List<BaseEventComponent> fEvents = new ArrayList<BaseEventComponent>();
  57
  58     /**
  59      * The list of available sessions.
  60      */
  61     private TraceSessionComponent[] fSessions;
  62
  63     /**
  64      * Flag for indicating Kernel or UST.
  65      */
  66     Boolean fIsKernel = null;
  67
  68     // ------------------------------------------------------------------------
  69     // Operations
  70     // ------------------------------------------------------------------------
  71
  72     /*
  73      * (non-Javadoc)
  74      * @see org.eclipse.core.commands.AbstractHandler#execute(org.eclipse.core.commands.ExecutionEvent)
  75      */
  76     @Override
  77     public Object execute(ExecutionEvent event) throws ExecutionException {
  78
  79         // Open dialog box to retrieve the session and channel where the events should be enabled in.
  80         final IGetEventInfoDialog dialog = TraceControlDialogFactory.getInstance().getGetEventInfoDialog();
  81         dialog.setIsKernel(fIsKernel);
  82         dialog.setSessions(fSessions);
  83
  84         if (dialog.open() != Window.OK) {
  85             return null;
  86         }
  87
  88         Job job = new Job(Messages.TraceControl_EnableEventsJob) {
  89             @Override
  90             protected IStatus run(IProgressMonitor monitor) {
  91
  92                 String errorString = null;
  93                 try {
  94                     List<String> eventNames = new ArrayList<String>();
  95                     // Create list of event names
  96                     for (Iterator<BaseEventComponent> iterator = fEvents.iterator(); iterator.hasNext();) {
  97                         BaseEventComponent event = (BaseEventComponent) iterator.next();
  98                         eventNames.add(event.getName());
  99                     }
 100
 101                     TraceChannelComponent channel = dialog.getChannel();
 102                     if (channel == null) {
 103                         // enable events on default channel (which will be created by lttng-tools)
 104                         dialog.getSession().enableEvents(eventNames, fIsKernel, monitor);
 105                     } else {
 106                         channel.enableEvents(eventNames, monitor);
 107                     }
 108
 109                 } catch (ExecutionException e) {
 110                     errorString = e.toString() + "\n"; //$NON-NLS-1$
 111                 }
 112
 113                 // get session configuration in all cases
 114                 try {
 115                     dialog.getSession().getConfigurationFromNode(monitor);
 116                 } catch (ExecutionException e) {
 117                     if (errorString == null) {
 118                         errorString = new String();
 119                     }
 120                     errorString += Messages.TraceControl_ListSessionFailure + ": " + e.toString();  //$NON-NLS-1$
 121                 }
 122
 123                 if (errorString != null) {
 124                     return new Status(Status.ERROR, LTTngUiPlugin.PLUGIN_ID, errorString);
 125                 }
 126                 return Status.OK_STATUS;
 127             }
 128         };
 129         job.setUser(true);
 130         job.schedule();
 131         return null;
 132     }
 133
 134     /*
 135      * (non-Javadoc)
 136      * @see org.eclipse.core.commands.AbstractHandler#isEnabled()
 137      */
 138     @Override
 139     public boolean isEnabled() {
 140         fEvents.clear();
 141         fSessions = null;
 142         fIsKernel = null;
 143
 144      // Get workbench page for the Control View
 145         IWorkbenchPage page = getWorkbenchPage();
 146         if (page == null) {
 147             return false;
 148         }
 149
 150         // Check if one or more session are selected
 151         ISelection selection = page.getSelection(ControlView.ID);
 152         if (selection instanceof StructuredSelection) {
 153
 154             StructuredSelection structered = ((StructuredSelection) selection);
 155             for (Iterator<?> iterator = structered.iterator(); iterator.hasNext();) {
 156                 Object element = (Object) iterator.next();
 157                 if (element instanceof BaseEventComponent) {
 158                     BaseEventComponent event = (BaseEventComponent) element;
 159                     ITraceControlComponent provider = event.getParent();
 160
 161                     // check for kernel or UST provider
 162                     boolean temp = false;
 163                     if (provider instanceof KernelProviderComponent) {
 164                         temp = true;
 165                     } else if (provider instanceof UstProviderComponent) {
 166                         temp = false;
 167                     } else {
 168                         return false;
 169                     }
 170                     if (fIsKernel == null) {
 171                         fIsKernel = Boolean.valueOf(temp);
 172                     } else {
 173                         // don't mix events from Kernel and UST provider
 174                         if (fIsKernel.booleanValue() != temp) {
 175                             return false;
 176                         }
 177                     }
 178
 179                     // Add BaseEventComponents
 180                     fEvents.add(event);
 181
 182                     if (fSessions == null) {
 183                         TargetNodeComponent  root = (TargetNodeComponent)event.getParent().getParent().getParent();
 184                         fSessions = root.getSessions();
 185                     }
 186                 }
 187             }
 188         }
 189         return ((fEvents.size() > 0) && (fSessions != null) && (fSessions.length > 0));
 190     }
 191 }