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