org.eclipse.linuxtools.lttng2.ui/src/org/eclipse/linuxtools/internal/lttng2/ui/views/control/handlers/CalibrateHandler.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
  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.ui.Activator;
  25 import org.eclipse.linuxtools.internal.lttng2.ui.views.control.ControlView;
  26 import org.eclipse.linuxtools.internal.lttng2.ui.views.control.Messages;
  27 import org.eclipse.linuxtools.internal.lttng2.ui.views.control.model.impl.TraceDomainComponent;
  28 import org.eclipse.linuxtools.internal.lttng2.ui.views.control.model.impl.TraceSessionComponent;
  29 import org.eclipse.ui.IWorkbenchPage;
  30 import org.eclipse.ui.IWorkbenchWindow;
  31 import org.eclipse.ui.PlatformUI;
  32
  33 /**
  34  * <b><u>CalibrateHandler</u></b>
  35  * <p>
  36  * Command handler implementation to execute command calibrate to quantify LTTng overhead.
  37  * </p>
  38  */
  39 public class CalibrateHandler extends BaseControlViewHandler {
  40
  41     // ------------------------------------------------------------------------
  42     // Attributes
  43     // ------------------------------------------------------------------------
  44     /**
  45      * The command execution parameter.
  46      */
  47     protected DomainCommandParameter fParam = null;
  48
  49     // ------------------------------------------------------------------------
  50     // Operations
  51     // ------------------------------------------------------------------------
  52
  53     /*
  54      * (non-Javadoc)
  55      * @see org.eclipse.core.commands.AbstractHandler#execute(org.eclipse.core.commands.ExecutionEvent)
  56      */
  57     @Override
  58     public Object execute(ExecutionEvent event) throws ExecutionException {
  59
  60         final IWorkbenchWindow window = PlatformUI.getWorkbench().getActiveWorkbenchWindow();
  61
  62         if (window == null) {
  63             return false;
  64         }
  65         fLock.lock();
  66         try {
  67             // Make a copy for thread safety
  68             final DomainCommandParameter param = fParam.clone();
  69
  70             Job addJob = new Job(Messages.TraceControl_AddCalibrateJob) {
  71                 @Override
  72                 protected IStatus run(IProgressMonitor monitor) {
  73                     try {
  74                         param.getDomain().calibrate(monitor);
  75                     } catch (ExecutionException e) {
  76                         return new Status(Status.ERROR, Activator.PLUGIN_ID, Messages.TraceControl_AddCalibrateFailure, e);
  77                     }
  78
  79                     return Status.OK_STATUS;
  80                 }
  81             };
  82             addJob.setUser(true);
  83             addJob.schedule();
  84
  85         } finally {
  86             fLock.unlock();
  87         }
  88         return Status.OK_STATUS;
  89     }
  90
  91     /*
  92      * (non-Javadoc)
  93      * @see org.eclipse.core.commands.AbstractHandler#isEnabled()
  94      */
  95     @Override
  96     public boolean isEnabled() {
  97
  98         // Get workbench page for the Control View
  99         IWorkbenchPage page = getWorkbenchPage();
 100         if (page == null) {
 101             return false;
 102         }
 103
 104         TraceDomainComponent domain = null;
 105         TraceSessionComponent session = null;
 106
 107         // Check if one domain is selected
 108         ISelection selection = page.getSelection(ControlView.ID);
 109         if (selection instanceof StructuredSelection) {
 110             StructuredSelection structered = ((StructuredSelection) selection);
 111             for (Iterator<?> iterator = structered.iterator(); iterator.hasNext();) {
 112                 Object element = (Object) iterator.next();
 113                 if (element instanceof TraceDomainComponent) {
 114                     TraceDomainComponent tmpDomain = (TraceDomainComponent) element;
 115                     session = (TraceSessionComponent) tmpDomain.getParent();
 116
 117                     // Add only TraceDomainComponent whose TraceSessionComponent parent is not destroyed
 118                     if ((!session.isDestroyed())) {
 119                         domain = tmpDomain;
 120                     }
 121                 }
 122             }
 123         }
 124
 125         boolean isEnabled = domain != null;
 126
 127         fLock.lock();
 128         try {
 129             fParam = null;
 130             if (isEnabled) {
 131                 fParam = new DomainCommandParameter(session, domain);
 132             }
 133         } finally {
 134             fLock.unlock();
 135         }
 136
 137         return isEnabled;
 138     }
 139 }