org.eclipse.linuxtools.lttng2.ui/src/org/eclipse/linuxtools/internal/lttng2/ui/views/control/handlers/EnableChannelOnDomainHandler.java

   1 /**********************************************************************
   2  * Copyright (c) 2012, 2013 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 known domain.
  31  * </p>
  32  *
  33  * @author Bernd Hufmann
  34  */
  35 public class EnableChannelOnDomainHandler extends BaseEnableChannelHandler {
  36
  37     // ------------------------------------------------------------------------
  38     // Attributes
  39     // ------------------------------------------------------------------------
  40
  41     // ------------------------------------------------------------------------
  42     // Operations
  43     // ------------------------------------------------------------------------
  44
  45     @Override
  46     public void enableChannel(CommandParameter param, List<String> channelNames, IChannelInfo info, boolean isKernel, IProgressMonitor monitor) throws ExecutionException {
  47         if (param instanceof DomainCommandParameter) {
  48             ((DomainCommandParameter)param).getDomain().enableChannels(channelNames, info, monitor);
  49         }
  50     }
  51
  52     @Override
  53     public TraceDomainComponent getDomain(CommandParameter param) {
  54         if (param instanceof DomainCommandParameter) {
  55             return ((DomainCommandParameter)param).getDomain();
  56         }
  57         return null;
  58     }
  59
  60     @Override
  61     public boolean isEnabled() {
  62
  63         // Get workbench page for the Control View
  64         IWorkbenchPage page = getWorkbenchPage();
  65         if (page == null) {
  66             return false;
  67         }
  68
  69         TraceDomainComponent domain = null;
  70         TraceSessionComponent session = null;
  71
  72         // Check if one domain is selected
  73         ISelection selection = page.getSelection(ControlView.ID);
  74         if (selection instanceof StructuredSelection) {
  75             StructuredSelection structered = ((StructuredSelection) selection);
  76             for (Iterator<?> iterator = structered.iterator(); iterator.hasNext();) {
  77                 Object element = iterator.next();
  78                 if (element instanceof TraceDomainComponent) {
  79                     TraceDomainComponent tmpDomain = (TraceDomainComponent) element;
  80                     session = (TraceSessionComponent) tmpDomain.getParent();
  81
  82                     // Add only TraceDomainComponent whose TraceSessionComponent parent is inactive and not destroyed
  83                     if ((session.getSessionState() == TraceSessionState.INACTIVE) && (!session.isDestroyed())) {
  84                         domain = tmpDomain;
  85                     }
  86                 }
  87             }
  88         }
  89
  90         boolean isEnabled = domain != null;
  91
  92         fLock.lock();
  93         try {
  94             fParam = null;
  95             if (isEnabled) {
  96                 fParam = new DomainCommandParameter(session, domain);
  97             }
  98         } finally {
  99             fLock.unlock();
 100         }
 101
 102         return isEnabled;
 103     }
 104
 105 }