org.eclipse.linuxtools.lttng2.ui/src/org/eclipse/linuxtools/internal/lttng2/ui/views/control/handlers/EnableChannelOnDomainHandler.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.ui.views.control.ControlView;
  22 import org.eclipse.linuxtools.internal.lttng2.ui.views.control.model.IChannelInfo;
  23 import org.eclipse.linuxtools.internal.lttng2.ui.views.control.model.TraceSessionState;
  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>EnableChannelOnDomainHandler</u></b>
  30  * <p>
  31  * Command handler implementation to enable a trace channel for known domain.
  32  * </p>
  33  */
  34 public class EnableChannelOnDomainHandler extends BaseEnableChannelHandler {
  35
  36     // ------------------------------------------------------------------------
  37     // Attributes
  38     // ------------------------------------------------------------------------
  39
  40     // ------------------------------------------------------------------------
  41     // Operations
  42     // ------------------------------------------------------------------------
  43     /*
  44      * (non-Javadoc)
  45      * @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)
  46      */
  47     @Override
  48     public void enableChannel(CommandParameter param, List<String> channelNames, IChannelInfo info, boolean isKernel, IProgressMonitor monitor) throws ExecutionException {
  49         if (param instanceof DomainCommandParameter) {
  50             ((DomainCommandParameter)param).getDomain().enableChannels(channelNames, info, monitor);
  51         }
  52     }
  53
  54     /*
  55      * (non-Javadoc)
  56      * @see org.eclipse.linuxtools.internal.lttng2.ui.views.control.handlers.BaseCreateChannelHandler#getDomain(org.eclipse.linuxtools.internal.lttng2.ui.views.control.handlers.CommandParameter)
  57      */
  58     @Override
  59     public TraceDomainComponent getDomain(CommandParameter param) {
  60         if (param instanceof DomainCommandParameter) {
  61             return ((DomainCommandParameter)param).getDomain();
  62         }
  63         return null;
  64     }
  65
  66     /*
  67      * (non-Javadoc)
  68      * @see org.eclipse.core.commands.AbstractHandler#isEnabled()
  69      */
  70     @Override
  71     public boolean isEnabled() {
  72
  73         // Get workbench page for the Control View
  74         IWorkbenchPage page = getWorkbenchPage();
  75         if (page == null) {
  76             return false;
  77         }
  78
  79         TraceDomainComponent domain = null;
  80         TraceSessionComponent session = null;
  81
  82         // Check if one domain is selected
  83         ISelection selection = page.getSelection(ControlView.ID);
  84         if (selection instanceof StructuredSelection) {
  85             StructuredSelection structered = ((StructuredSelection) selection);
  86             for (Iterator<?> iterator = structered.iterator(); iterator.hasNext();) {
  87                 Object element = (Object) iterator.next();
  88                 if (element instanceof TraceDomainComponent) {
  89                     TraceDomainComponent tmpDomain = (TraceDomainComponent) element;
  90                     session = (TraceSessionComponent) tmpDomain.getParent();
  91
  92                     // Add only TraceDomainComponent whose TraceSessionComponent parent is inactive and not destroyed
  93                     if ((session.getSessionState() == TraceSessionState.INACTIVE) && (!session.isDestroyed())) {
  94                         domain = tmpDomain;
  95                     }
  96                 }
  97             }
  98         }
  99
 100         boolean isEnabled = domain != null;
 101
 102         fLock.lock();
 103         try {
 104             fParam = null;
 105             if (isEnabled) {
 106                 fParam = new DomainCommandParameter(session, domain);
 107             }
 108         } finally {
 109             fLock.unlock();
 110         }
 111
 112         return isEnabled;
 113     }
 114
 115 }