org.eclipse.linuxtools.lttng2.control.ui/src/org/eclipse/linuxtools/internal/lttng2/control/ui/views/handlers/CalibrateHandler.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.control.ui.views.handlers;
  13
  14 import java.util.Iterator;
  15
  16 import org.eclipse.core.commands.ExecutionEvent;
  17 import org.eclipse.core.commands.ExecutionException;
  18 import org.eclipse.core.runtime.IProgressMonitor;
  19 import org.eclipse.core.runtime.IStatus;
  20 import org.eclipse.core.runtime.Status;
  21 import org.eclipse.core.runtime.jobs.Job;
  22 import org.eclipse.jface.viewers.ISelection;
  23 import org.eclipse.jface.viewers.StructuredSelection;
  24 import org.eclipse.linuxtools.internal.lttng2.control.ui.Activator;
  25 import org.eclipse.linuxtools.internal.lttng2.control.ui.views.ControlView;
  26 import org.eclipse.linuxtools.internal.lttng2.control.ui.views.messages.Messages;
  27 import org.eclipse.linuxtools.internal.lttng2.control.ui.views.model.impl.TraceDomainComponent;
  28 import org.eclipse.linuxtools.internal.lttng2.control.ui.views.model.impl.TraceSessionComponent;
  29 import org.eclipse.ui.IWorkbenchPage;
  30 import org.eclipse.ui.IWorkbenchWindow;
  31 import org.eclipse.ui.PlatformUI;
  32
  33 /**
  34  * <p>
  35  * Command handler implementation to execute command calibrate to quantify LTTng overhead.
  36  * </p>
  37  *
  38  * @author Bernd Hufmann
  39  */
  40 public class CalibrateHandler extends BaseControlViewHandler {
  41
  42     // ------------------------------------------------------------------------
  43     // Attributes
  44     // ------------------------------------------------------------------------
  45     /**
  46      * The command execution parameter.
  47      */
  48     protected DomainCommandParameter fParam = null;
  49
  50     // ------------------------------------------------------------------------
  51     // Operations
  52     // ------------------------------------------------------------------------
  53
  54     @Override
  55     public Object execute(ExecutionEvent event) throws ExecutionException {
  56
  57         final IWorkbenchWindow window = PlatformUI.getWorkbench().getActiveWorkbenchWindow();
  58
  59         if (window == null) {
  60             return false;
  61         }
  62         fLock.lock();
  63         try {
  64             // Make a copy for thread safety
  65             final DomainCommandParameter param = fParam.clone();
  66
  67             Job addJob = new Job(Messages.TraceControl_AddCalibrateJob) {
  68                 @Override
  69                 protected IStatus run(IProgressMonitor monitor) {
  70                     try {
  71                         param.getDomain().calibrate(monitor);
  72                     } catch (ExecutionException e) {
  73                         return new Status(IStatus.ERROR, Activator.PLUGIN_ID, Messages.TraceControl_AddCalibrateFailure, e);
  74                     }
  75
  76                     return Status.OK_STATUS;
  77                 }
  78             };
  79             addJob.setUser(true);
  80             addJob.schedule();
  81
  82         } finally {
  83             fLock.unlock();
  84         }
  85         return Status.OK_STATUS;
  86     }
  87
  88     @Override
  89     public boolean isEnabled() {
  90
  91         // Get workbench page for the Control View
  92         IWorkbenchPage page = getWorkbenchPage();
  93         if (page == null) {
  94             return false;
  95         }
  96
  97         TraceDomainComponent domain = null;
  98         TraceSessionComponent session = null;
  99
 100         // Check if one domain is selected
 101         ISelection selection = page.getSelection(ControlView.ID);
 102         if (selection instanceof StructuredSelection) {
 103             StructuredSelection structered = ((StructuredSelection) selection);
 104             for (Iterator<?> iterator = structered.iterator(); iterator.hasNext();) {
 105                 Object element = iterator.next();
 106                 if (element instanceof TraceDomainComponent) {
 107                     TraceDomainComponent tmpDomain = (TraceDomainComponent) element;
 108                     session = (TraceSessionComponent) tmpDomain.getParent();
 109
 110                     // Add only TraceDomainComponent whose TraceSessionComponent parent is not destroyed
 111                     if ((!session.isDestroyed())) {
 112                         domain = tmpDomain;
 113                     }
 114                 }
 115             }
 116         }
 117
 118         boolean isEnabled = domain != null;
 119
 120         fLock.lock();
 121         try {
 122             fParam = null;
 123             if (isEnabled) {
 124                 fParam = new DomainCommandParameter(session, domain);
 125             }
 126         } finally {
 127             fLock.unlock();
 128         }
 129
 130         return isEnabled;
 131     }
 132 }