org.eclipse.linuxtools.lttng.ui/src/org/eclipse/linuxtools/lttng/ui/views/control/handlers/EnableEventOnSessionHandler.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.Iterator;
  15 import java.util.List;
  16
  17 import org.eclipse.core.commands.ExecutionException;
  18 import org.eclipse.core.runtime.IProgressMonitor;
  19 import org.eclipse.jface.viewers.ISelection;
  20 import org.eclipse.jface.viewers.StructuredSelection;
  21 import org.eclipse.linuxtools.lttng.ui.views.control.ControlView;
  22 import org.eclipse.linuxtools.lttng.ui.views.control.model.TraceSessionState;
  23 import org.eclipse.linuxtools.lttng.ui.views.control.model.impl.TraceSessionComponent;
  24 import org.eclipse.ui.IWorkbenchPage;
  25
  26 /**
  27  * <b><u>EnableEventOnSessionHandler</u></b>
  28  * <p>
  29  * Command handler implementation to enable events for a known session and default channel 'channel0'
  30  * (which will be created if doesn't exist).
  31  * </p>
  32  */
  33 public class EnableEventOnSessionHandler extends BaseEnableEventHandler {
  34
  35     // ------------------------------------------------------------------------
  36     // Attributes
  37     // ------------------------------------------------------------------------
  38
  39     //-------------------------------------------------------------------------
  40     // Operations
  41     // ------------------------------------------------------------------------
  42     /*
  43      * (non-Javadoc)
  44      * @see org.eclipse.linuxtools.lttng.ui.views.control.handlers.BaseEnableEventHandler#enableEvents(java.util.List, org.eclipse.core.runtime.IProgressMonitor)
  45      */
  46     @Override
  47     void enableEvents(List<String> eventNames, IProgressMonitor monitor) throws ExecutionException {
  48         fSession.enableEvents(eventNames, true, monitor);
  49     }
  50
  51     /*
  52      * (non-Javadoc)
  53      * @see org.eclipse.linuxtools.lttng.ui.views.control.handlers.BaseEnableEventHandler#enableSyscalls(org.eclipse.core.runtime.IProgressMonitor)
  54      */
  55     @Override
  56     void enableSyscalls(IProgressMonitor monitor) throws ExecutionException {
  57         fSession.enableSyscalls(monitor);
  58     }
  59
  60     /*
  61      * (non-Javadoc)
  62      * @see org.eclipse.linuxtools.lttng.ui.views.control.handlers.BaseEnableEventHandler#enableProbe(java.lang.String, java.lang.String, org.eclipse.core.runtime.IProgressMonitor)
  63      */
  64     @Override
  65     void enableProbe(String eventName, String probe, IProgressMonitor monitor) throws ExecutionException {
  66         fSession.enableProbe(eventName, probe, monitor);
  67     }
  68
  69     /*
  70      * (non-Javadoc)
  71      * @see org.eclipse.linuxtools.lttng.ui.views.control.handlers.BaseEnableEventHandler#enableFunctionProbe(java.lang.String, java.lang.String, org.eclipse.core.runtime.IProgressMonitor)
  72      */
  73     @Override
  74     void enableFunctionProbe(String eventName, String probe, IProgressMonitor monitor) throws ExecutionException {
  75         fSession.enableFunctionProbe(eventName, probe, monitor);
  76     }
  77
  78     /*
  79      * (non-Javadoc)
  80      * @see org.eclipse.core.commands.AbstractHandler#isEnabled()
  81      */
  82     @Override
  83     public boolean isEnabled() {
  84         // Get workbench page for the Control View
  85         IWorkbenchPage page = getWorkbenchPage();
  86         if (page == null) {
  87             return false;
  88         }
  89
  90         fSession = null;
  91
  92         // Check if one session is selected
  93         ISelection selection = page.getSelection(ControlView.ID);
  94         if (selection instanceof StructuredSelection) {
  95             StructuredSelection structered = ((StructuredSelection) selection);
  96             for (Iterator<?> iterator = structered.iterator(); iterator.hasNext();) {
  97                 Object element = (Object) iterator.next();
  98                 if (element instanceof TraceSessionComponent) {
  99                     // Add only TraceSessionComponents is inactive and not destroyed
 100                     TraceSessionComponent session = (TraceSessionComponent) element;
 101                     if(session.getSessionState() == TraceSessionState.INACTIVE && !session.isDestroyed()) {
 102                         fSession = session;
 103                     }
 104                 }
 105             }
 106         }
 107         return fSession != null;
 108     }
 109 }