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.AbstractHandler;
  19 import org.eclipse.core.commands.ExecutionEvent;
  20 import org.eclipse.core.commands.ExecutionException;
  21 import org.eclipse.core.runtime.IProgressMonitor;
  22 import org.eclipse.core.runtime.IStatus;
  23 import org.eclipse.core.runtime.Status;
  24 import org.eclipse.core.runtime.jobs.Job;
  25 import org.eclipse.jface.viewers.ISelection;
  26 import org.eclipse.jface.viewers.StructuredSelection;
  27 import org.eclipse.jface.window.Window;
  28 import org.eclipse.linuxtools.lttng.ui.LTTngUiPlugin;
  29 import org.eclipse.linuxtools.lttng.ui.views.control.ControlView;
  30 import org.eclipse.linuxtools.lttng.ui.views.control.Messages;
  31 import org.eclipse.linuxtools.lttng.ui.views.control.dialogs.GetEventInfoDialog;
  32 import org.eclipse.linuxtools.lttng.ui.views.control.dialogs.IGetEventInfoDialog;
  33 import org.eclipse.linuxtools.lttng.ui.views.control.model.ITraceControlComponent;
  34 import org.eclipse.linuxtools.lttng.ui.views.control.model.impl.BaseEventComponent;
  35 import org.eclipse.linuxtools.lttng.ui.views.control.model.impl.KernelProviderComponent;
  36 import org.eclipse.linuxtools.lttng.ui.views.control.model.impl.TargetNodeComponent;
  37 import org.eclipse.linuxtools.lttng.ui.views.control.model.impl.TraceChannelComponent;
  38 import org.eclipse.linuxtools.lttng.ui.views.control.model.impl.TraceSessionComponent;
  39 import org.eclipse.linuxtools.lttng.ui.views.control.model.impl.UstProviderComponent;
  40 import org.eclipse.ui.IWorkbenchPage;
  41 import org.eclipse.ui.IWorkbenchPart;
  42 import org.eclipse.ui.IWorkbenchWindow;
  43 import org.eclipse.ui.PlatformUI;
  44
  45 /**
  46  * <b><u>EnableEventHandler</u></b>
  47  * <p>
  48  * Command handler implementation to assign events to a session and channel and enable/configure them.
  49  * This is done on the trace provider level.
  50  * </p>
  51  */
  52 public class AssignEventHandler extends AbstractHandler {
  53
  54     // ------------------------------------------------------------------------
  55     // Attributes
  56     // ------------------------------------------------------------------------
  57     /**
  58      * The list of event components the command is to be executed on.
  59      */
  60     private List<BaseEventComponent> fEvents = new ArrayList<BaseEventComponent>();
  61
  62     /**
  63      * The list of available sessions.
  64      */
  65     private TraceSessionComponent[] fSessions;
  66
  67     /**
  68      * Flag for indicating Kernel or UST.
  69      */
  70     Boolean fIsKernel = null;
  71
  72     // ------------------------------------------------------------------------
  73     // Operations
  74     // ------------------------------------------------------------------------
  75
  76     /*
  77      * (non-Javadoc)
  78      * @see org.eclipse.core.commands.AbstractHandler#execute(org.eclipse.core.commands.ExecutionEvent)
  79      */
  80     @Override
  81     public Object execute(ExecutionEvent event) throws ExecutionException {
  82
  83         IWorkbenchWindow window = PlatformUI.getWorkbench().getActiveWorkbenchWindow();
  84
  85         if (window == null) {
  86             return false;
  87         }
  88
  89         // Open dialog box to retrieve the session and channel where the events should be enabled in.
  90         final IGetEventInfoDialog dialog = new GetEventInfoDialog(window.getShell(), fIsKernel, fSessions);
  91
  92         if (dialog.open() != Window.OK) {
  93             return null;
  94         }
  95
  96         Job job = new Job(Messages.TraceControl_EnableEventsJob) {
  97             @Override
  98             protected IStatus run(IProgressMonitor monitor) {
  99
 100                 String errorString = null;
 101                 try {
 102                     List<String> eventNames = new ArrayList<String>();
 103                     // Create list of event names
 104                     for (Iterator<BaseEventComponent> iterator = fEvents.iterator(); iterator.hasNext();) {
 105                         BaseEventComponent event = (BaseEventComponent) iterator.next();
 106                         eventNames.add(event.getName());
 107                     }
 108
 109                     TraceChannelComponent channel = dialog.getChannel();
 110                     if (channel == null) {
 111                         // enable events on default channel (which will be created by lttng-tools)
 112                         dialog.getSession().enableEvents(eventNames, fIsKernel, monitor);
 113                     } else {
 114                         channel.enableEvents(eventNames, monitor);
 115                     }
 116
 117                 } catch (ExecutionException e) {
 118                     errorString = e.toString() + "\n"; //$NON-NLS-1$
 119                 }
 120
 121                 // get session configuration in all cases
 122                 try {
 123                     dialog.getSession().getConfigurationFromNode(monitor);
 124                 } catch (ExecutionException e) {
 125                     if (errorString == null) {
 126                         errorString = new String();
 127                     }
 128                     errorString += Messages.TraceControl_ListSessionFailure + ": " + e.toString();  //$NON-NLS-1$
 129                 }
 130
 131                 if (errorString != null) {
 132                     return new Status(Status.ERROR, LTTngUiPlugin.PLUGIN_ID, errorString);
 133                 }
 134                 return Status.OK_STATUS;
 135             }
 136         };
 137         job.setUser(true);
 138         job.schedule();
 139         return null;
 140     }
 141
 142     /*
 143      * (non-Javadoc)
 144      * @see org.eclipse.core.commands.AbstractHandler#isEnabled()
 145      */
 146     @Override
 147     public boolean isEnabled() {
 148         fEvents.clear();
 149         fSessions = null;
 150         fIsKernel = null;
 151
 152         // Check if we are closing down
 153         IWorkbenchWindow window = PlatformUI.getWorkbench().getActiveWorkbenchWindow();
 154         if (window == null) {
 155             return false;
 156         }
 157
 158         // Check if we are in the Project View
 159         IWorkbenchPage page = window.getActivePage();
 160         if (page == null) {
 161             return false;
 162         }
 163
 164         IWorkbenchPart part = page.getActivePart();
 165         if (!(part instanceof ControlView)) {
 166             return false;
 167         }
 168
 169         // Check if one or more session are selected
 170         ISelection selection = page.getSelection(ControlView.ID);
 171         if (selection instanceof StructuredSelection) {
 172
 173             StructuredSelection structered = ((StructuredSelection) selection);
 174             for (Iterator<?> iterator = structered.iterator(); iterator.hasNext();) {
 175                 Object element = (Object) iterator.next();
 176                 if (element instanceof BaseEventComponent) {
 177                     BaseEventComponent event = (BaseEventComponent) element;
 178                     ITraceControlComponent provider = event.getParent();
 179
 180                     // check for kernel or UST provider
 181                     boolean temp = false;
 182                     if (provider instanceof KernelProviderComponent) {
 183                         temp = true;
 184                     } else if (provider instanceof UstProviderComponent) {
 185                         temp = false;
 186                     } else {
 187                         return false;
 188                     }
 189                     if (fIsKernel == null) {
 190                         fIsKernel = Boolean.valueOf(temp);
 191                     } else {
 192                         // don't mix events from Kernel and UST provider
 193                         if (fIsKernel.booleanValue() != temp) {
 194                             return false;
 195                         }
 196                     }
 197
 198                     // Add BaseEventComponents
 199                     fEvents.add(event);
 200
 201                     if (fSessions == null) {
 202                         TargetNodeComponent  root = (TargetNodeComponent)event.getParent().getParent().getParent();
 203                         fSessions = root.getSessions();
 204                     }
 205                 }
 206             }
 207         }
 208         return ((fEvents.size() > 0) && (fSessions != null) && (fSessions.length > 0));
 209     }
 210 }