lttng/org.eclipse.tracecompass.lttng2.control.ui/src/org/eclipse/tracecompass/internal/lttng2/control/ui/views/handlers/CalibrateHandler.java

   1 /**********************************************************************
   2  * Copyright (c) 2012, 2015 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.tracecompass.internal.lttng2.control.ui.views.handlers;
  13
  14 import static org.eclipse.tracecompass.common.core.NonNullUtils.checkNotNull;
  15
  16 import java.util.Iterator;
  17
  18 import org.eclipse.core.commands.ExecutionEvent;
  19 import org.eclipse.core.commands.ExecutionException;
  20 import org.eclipse.core.runtime.IProgressMonitor;
  21 import org.eclipse.core.runtime.IStatus;
  22 import org.eclipse.core.runtime.Status;
  23 import org.eclipse.core.runtime.jobs.Job;
  24 import org.eclipse.jface.viewers.ISelection;
  25 import org.eclipse.jface.viewers.StructuredSelection;
  26 import org.eclipse.tracecompass.internal.lttng2.control.ui.Activator;
  27 import org.eclipse.tracecompass.internal.lttng2.control.ui.views.ControlView;
  28 import org.eclipse.tracecompass.internal.lttng2.control.ui.views.messages.Messages;
  29 import org.eclipse.tracecompass.internal.lttng2.control.ui.views.model.impl.TraceDomainComponent;
  30 import org.eclipse.tracecompass.internal.lttng2.control.ui.views.model.impl.TraceSessionComponent;
  31 import org.eclipse.ui.IWorkbenchPage;
  32 import org.eclipse.ui.IWorkbenchWindow;
  33 import org.eclipse.ui.PlatformUI;
  34
  35 /**
  36  * <p>
  37  * Command handler implementation to execute command calibrate to quantify LTTng overhead.
  38  * </p>
  39  *
  40  * @author Bernd Hufmann
  41  */
  42 public class CalibrateHandler extends BaseControlViewHandler {
  43
  44     // ------------------------------------------------------------------------
  45     // Attributes
  46     // ------------------------------------------------------------------------
  47     /**
  48      * The command execution parameter.
  49      */
  50     protected DomainCommandParameter fParam = null;
  51
  52     // ------------------------------------------------------------------------
  53     // Operations
  54     // ------------------------------------------------------------------------
  55
  56     @Override
  57     public Object execute(ExecutionEvent event) throws ExecutionException {
  58
  59         final IWorkbenchWindow window = PlatformUI.getWorkbench().getActiveWorkbenchWindow();
  60
  61         if (window == null) {
  62             return false;
  63         }
  64         fLock.lock();
  65         try {
  66
  67             DomainCommandParameter tmpParam = fParam;
  68             if (tmpParam == null) {
  69                 return null;
  70             }
  71
  72             // Make a copy for thread safety
  73             final DomainCommandParameter param = new DomainCommandParameter(tmpParam);
  74
  75             Job addJob = new Job(Messages.TraceControl_AddCalibrateJob) {
  76                 @Override
  77                 protected IStatus run(IProgressMonitor monitor) {
  78                     try {
  79                         param.getDomain().calibrate(monitor);
  80                     } catch (ExecutionException e) {
  81                         return new Status(IStatus.ERROR, Activator.PLUGIN_ID, Messages.TraceControl_AddCalibrateFailure, e);
  82                     }
  83
  84                     return Status.OK_STATUS;
  85                 }
  86             };
  87             addJob.setUser(true);
  88             addJob.schedule();
  89
  90         } finally {
  91             fLock.unlock();
  92         }
  93         return Status.OK_STATUS;
  94     }
  95
  96     @Override
  97     public boolean isEnabled() {
  98
  99         // Get workbench page for the Control View
 100         IWorkbenchPage page = getWorkbenchPage();
 101         if (page == null) {
 102             return false;
 103         }
 104
 105         TraceDomainComponent domain = null;
 106         TraceSessionComponent session = null;
 107
 108         // Check if one domain is selected
 109         ISelection selection = page.getSelection(ControlView.ID);
 110         if (selection instanceof StructuredSelection) {
 111             StructuredSelection structered = ((StructuredSelection) selection);
 112             for (Iterator<?> iterator = structered.iterator(); iterator.hasNext();) {
 113                 Object element = iterator.next();
 114                 if (element instanceof TraceDomainComponent) {
 115                     TraceDomainComponent tmpDomain = (TraceDomainComponent) element;
 116                     session = (TraceSessionComponent) tmpDomain.getParent();
 117
 118                     // Add only TraceDomainComponent whose TraceSessionComponent parent is not destroyed
 119                     if ((!session.isDestroyed())) {
 120                         domain = tmpDomain;
 121                     }
 122                 }
 123             }
 124         }
 125
 126         boolean isEnabled = domain != null;
 127
 128         fLock.lock();
 129         try {
 130             fParam = null;
 131             if (isEnabled) {
 132                 fParam = new DomainCommandParameter(checkNotNull(session), checkNotNull(domain));
 133             }
 134         } finally {
 135             fLock.unlock();
 136         }
 137
 138         return isEnabled;
 139     }
 140 }