lttng/org.eclipse.tracecompass.lttng2.control.ui/src/org/eclipse/tracecompass/internal/lttng2/control/ui/views/handlers/DestroySessionHandler.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 java.util.ArrayList;
  15 import java.util.Iterator;
  16 import java.util.List;
  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.jdt.annotation.NonNull;
  25 import org.eclipse.jface.viewers.ISelection;
  26 import org.eclipse.jface.viewers.StructuredSelection;
  27 import org.eclipse.tracecompass.internal.lttng2.control.core.model.TraceSessionState;
  28 import org.eclipse.tracecompass.internal.lttng2.control.ui.Activator;
  29 import org.eclipse.tracecompass.internal.lttng2.control.ui.views.ControlView;
  30 import org.eclipse.tracecompass.internal.lttng2.control.ui.views.dialogs.IConfirmDialog;
  31 import org.eclipse.tracecompass.internal.lttng2.control.ui.views.dialogs.TraceControlDialogFactory;
  32 import org.eclipse.tracecompass.internal.lttng2.control.ui.views.messages.Messages;
  33 import org.eclipse.tracecompass.internal.lttng2.control.ui.views.model.impl.TraceSessionComponent;
  34 import org.eclipse.tracecompass.internal.lttng2.control.ui.views.model.impl.TraceSessionGroup;
  35 import org.eclipse.ui.IWorkbenchPage;
  36 import org.eclipse.ui.IWorkbenchWindow;
  37 import org.eclipse.ui.PlatformUI;
  38
  39 /**
  40  * <p>
  41  * Command handler implementation to destroy one or more trace sessions.
  42  * </p>
  43  *
  44  * @author Bernd Hufmann
  45  */
  46 public class DestroySessionHandler extends BaseControlViewHandler {
  47
  48     // ------------------------------------------------------------------------
  49     // Attributes
  50     // ------------------------------------------------------------------------
  51     /**
  52      * The list of session components the command is to be executed on.
  53      */
  54     @NonNull private final List<TraceSessionComponent> fSessions = new ArrayList<>();
  55
  56     // ------------------------------------------------------------------------
  57     // Operations
  58     // ------------------------------------------------------------------------
  59
  60     @Override
  61     public Object execute(ExecutionEvent event) throws ExecutionException {
  62
  63         IWorkbenchWindow window = PlatformUI.getWorkbench().getActiveWorkbenchWindow();
  64
  65         if (window == null) {
  66             return false;
  67         }
  68
  69         List<TraceSessionComponent> tmpSessions = new ArrayList<>();
  70
  71         // Make a copy of the session list to avoid concurrent modification
  72         // of the list of sessions
  73         fLock.lock();
  74         try {
  75             tmpSessions.addAll(fSessions);
  76         } finally {
  77             fLock.unlock();
  78         }
  79         final List<TraceSessionComponent> sessions = tmpSessions;
  80
  81         // Get user confirmation
  82         IConfirmDialog dialog = TraceControlDialogFactory.getInstance().getConfirmDialog();
  83         if (!dialog.openConfirm(window.getShell(),
  84                 Messages.TraceControl_DestroyConfirmationTitle,
  85                 Messages.TraceControl_DestroyConfirmationMessage)) {
  86
  87             return null;
  88         }
  89
  90         Job job = new Job(Messages.TraceControl_DestroySessionJob) {
  91             @Override
  92             protected IStatus run(IProgressMonitor monitor) {
  93                 try {
  94                     for (TraceSessionComponent session : sessions) {
  95                         // Destroy all selected sessions
  96                         TraceSessionGroup sessionGroup = (TraceSessionGroup)session.getParent();
  97                         sessionGroup.destroySession(session, monitor);
  98                     }
  99                 } catch (ExecutionException e) {
 100                     return new Status(IStatus.ERROR, Activator.PLUGIN_ID, Messages.TraceControl_DestroySessionFailure, e);
 101                 }
 102                 return Status.OK_STATUS;
 103             }
 104         };
 105         job.setUser(true);
 106         job.schedule();
 107
 108         return null;
 109     }
 110
 111     @Override
 112     public boolean isEnabled() {
 113         // Get workbench page for the Control View
 114         IWorkbenchPage page = getWorkbenchPage();
 115         if (page == null) {
 116             return false;
 117         }
 118
 119         List<TraceSessionComponent> sessions = new ArrayList<>(0);
 120
 121         // Check if one or more session are selected
 122         ISelection selection = page.getSelection(ControlView.ID);
 123         if (selection instanceof StructuredSelection) {
 124             StructuredSelection structered = ((StructuredSelection) selection);
 125             for (Iterator<?> iterator = structered.iterator(); iterator.hasNext();) {
 126                 Object element = iterator.next();
 127                 if (element instanceof TraceSessionComponent) {
 128                     // Add only TraceSessionComponents that are inactive and not destroyed
 129                     TraceSessionComponent session = (TraceSessionComponent) element;
 130                     if ((session.getSessionState() == TraceSessionState.INACTIVE) && (!session.isDestroyed())) {
 131                         sessions.add((TraceSessionComponent)element);
 132                     }
 133                 }
 134             }
 135         }
 136         boolean isEnabled = !sessions.isEmpty();
 137         fLock.lock();
 138         try {
 139             fSessions.clear();
 140             if (isEnabled) {
 141                 fSessions.addAll(sessions);
 142             }
 143         } finally {
 144             fLock.unlock();
 145         }
 146         return isEnabled;
 147     }
 148 }