org.eclipse.linuxtools.lttng2.ui/src/org/eclipse/linuxtools/internal/lttng2/ui/views/control/handlers/EnableChannelOnSessionHandler.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.internal.lttng2.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.internal.lttng2.core.control.model.IChannelInfo;
  22 import org.eclipse.linuxtools.internal.lttng2.core.control.model.TraceSessionState;
  23 import org.eclipse.linuxtools.internal.lttng2.ui.views.control.ControlView;
  24 import org.eclipse.linuxtools.internal.lttng2.ui.views.control.model.impl.TraceDomainComponent;
  25 import org.eclipse.linuxtools.internal.lttng2.ui.views.control.model.impl.TraceSessionComponent;
  26 import org.eclipse.ui.IWorkbenchPage;
  27
  28 /**
  29  * <p>
  30  * Command handler implementation to enable a trace channel for unknown domain
  31  * (on session level).
  32  * </p>
  33  *
  34  * @author Bernd Hufmann
  35  */
  36 public class EnableChannelOnSessionHandler extends BaseEnableChannelHandler {
  37
  38     // ------------------------------------------------------------------------
  39     // Attributes
  40     // ------------------------------------------------------------------------
  41     /*
  42      * (non-Javadoc)
  43      * @see org.eclipse.linuxtools.internal.lttng2.ui.views.control.handlers.BaseCreateChannelHandler#enableChannel(org.eclipse.linuxtools.internal.lttng2.ui.views.control.handlers.CommandParameter, java.util.List, org.eclipse.linuxtools.internal.lttng2.ui.views.control.model.IChannelInfo, boolean, org.eclipse.core.runtime.IProgressMonitor)
  44      */
  45     @Override
  46     public void enableChannel(CommandParameter param, List<String> channelNames, IChannelInfo info, boolean isKernel, IProgressMonitor monitor) throws ExecutionException {
  47         param.getSession().enableChannels(channelNames, info, isKernel, monitor);
  48     }
  49
  50     /*
  51      * (non-Javadoc)
  52      * @see org.eclipse.linuxtools.internal.lttng2.ui.views.control.handlers.BaseCreateChannelHandler#getDomain(org.eclipse.linuxtools.internal.lttng2.ui.views.control.handlers.CommandParameter)
  53      */
  54     @Override
  55     public TraceDomainComponent getDomain(CommandParameter param) {
  56         return null;
  57     }
  58
  59     // ------------------------------------------------------------------------
  60     // Operations
  61     // ------------------------------------------------------------------------
  62
  63     /*
  64      * (non-Javadoc)
  65      * @see org.eclipse.core.commands.AbstractHandler#isEnabled()
  66      */
  67     @Override
  68     public boolean isEnabled() {
  69         // Get workbench page for the Control View
  70         IWorkbenchPage page = getWorkbenchPage();
  71         if (page == null) {
  72             return false;
  73         }
  74
  75         TraceSessionComponent session = null;
  76         // Check if one session is selected
  77         ISelection selection = page.getSelection(ControlView.ID);
  78         if (selection instanceof StructuredSelection) {
  79             StructuredSelection structered = ((StructuredSelection) selection);
  80             for (Iterator<?> iterator = structered.iterator(); iterator.hasNext();) {
  81                 Object element = iterator.next();
  82                 if (element instanceof TraceSessionComponent) {
  83                     // Add only TraceSessionComponents that are inactive and not destroyed
  84                     TraceSessionComponent tmpSession = (TraceSessionComponent) element;
  85                     if ((tmpSession.getSessionState() == TraceSessionState.INACTIVE) && (!tmpSession.isDestroyed())) {
  86                         session = tmpSession;
  87                     }
  88                 }
  89             }
  90         }
  91         boolean isEnabled = session != null;
  92
  93         fLock.lock();
  94         try {
  95             fParam = null;
  96             if (isEnabled) {
  97                 fParam = new CommandParameter(session);
  98             }
  99         } finally {
 100             fLock.unlock();
 101         }
 102
 103         return isEnabled;
 104     }
 105 }