org.eclipse.linuxtools.lttng.ui/src/org/eclipse/linuxtools/lttng/ui/views/control/handlers/EnableEventOnChannelHandler.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.impl.TraceChannelComponent;
  23 import org.eclipse.ui.IWorkbenchPage;
  24
  25 /**
  26  * <b><u>EnableEventOnChannelHandler</u></b>
  27  * <p>
  28  * Command handler implementation to enable events for a known channel.
  29  * </p>
  30  */
  31 public class EnableEventOnChannelHandler extends BaseEnableEventHandler {
  32
  33     // ------------------------------------------------------------------------
  34     // Attributes
  35     // ------------------------------------------------------------------------
  36     /**
  37      * The channel component the command is to be executed on.
  38      */
  39     private TraceChannelComponent fChannel = null;
  40
  41     // ------------------------------------------------------------------------
  42     // Operations
  43     // ------------------------------------------------------------------------
  44     /*
  45      * (non-Javadoc)
  46      * @see org.eclipse.linuxtools.lttng.ui.views.control.handlers.BaseEnableEventHandler#enableEvents(java.util.List, org.eclipse.core.runtime.IProgressMonitor)
  47      */
  48     @Override
  49     void enableEvents(List<String> eventNames, IProgressMonitor monitor) throws ExecutionException {
  50         fChannel.enableEvents(eventNames, monitor);
  51     }
  52
  53     /*
  54      * (non-Javadoc)
  55      * @see org.eclipse.linuxtools.lttng.ui.views.control.handlers.BaseEnableEventHandler#enableSyscalls(org.eclipse.core.runtime.IProgressMonitor)
  56      */
  57     @Override
  58     void enableSyscalls(IProgressMonitor monitor) throws ExecutionException {
  59         fChannel.enableSyscalls(monitor);
  60     }
  61
  62     /*
  63      * (non-Javadoc)
  64      * @see org.eclipse.linuxtools.lttng.ui.views.control.handlers.BaseEnableEventHandler#enableProbe(java.lang.String, java.lang.String, org.eclipse.core.runtime.IProgressMonitor)
  65      */
  66     @Override
  67     void enableProbe(String eventName, String probe, IProgressMonitor monitor) throws ExecutionException {
  68         fChannel.enableProbe(eventName, probe, monitor);
  69     }
  70
  71     /*
  72      * (non-Javadoc)
  73      * @see org.eclipse.linuxtools.lttng.ui.views.control.handlers.BaseEnableEventHandler#enableFunctionProbe(java.lang.String, java.lang.String, org.eclipse.core.runtime.IProgressMonitor)
  74      */
  75     @Override
  76     void enableFunctionProbe(String eventName, String probe, IProgressMonitor monitor) throws ExecutionException {
  77         fChannel.enableFunctionProbe(eventName, probe, monitor);
  78     }
  79
  80     /*
  81      * (non-Javadoc)
  82      * @see org.eclipse.core.commands.AbstractHandler#isEnabled()
  83      */
  84     @Override
  85     public boolean isEnabled() {
  86         // Get workbench page for the Control View
  87         IWorkbenchPage page = getWorkbenchPage();
  88         if (page == null) {
  89             return false;
  90         }
  91
  92         fChannel = null;
  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 TraceChannelComponent) {
  99                     fChannel = (TraceChannelComponent) element;
 100                     fSession = fChannel.getSession();
 101                 }
 102             }
 103         }
 104         return fChannel != null;
 105     }
 106
 107 }