org.eclipse.linuxtools.lttng2.ui/src/org/eclipse/linuxtools/internal/lttng2/ui/views/control/handlers/BaseControlViewHandler.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.concurrent.locks.ReentrantLock;
  15
  16 import org.eclipse.core.commands.AbstractHandler;
  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.linuxtools.internal.lttng2.ui.Activator;
  23 import org.eclipse.linuxtools.internal.lttng2.ui.views.control.ControlView;
  24 import org.eclipse.linuxtools.internal.lttng2.ui.views.control.messages.Messages;
  25 import org.eclipse.ui.IWorkbenchPage;
  26 import org.eclipse.ui.IWorkbenchPart;
  27 import org.eclipse.ui.IWorkbenchWindow;
  28 import org.eclipse.ui.PlatformUI;
  29
  30 /**
  31  * <p>
  32  * Abstract Command handler implementation for all control view handlers.
  33  * </p>
  34  *
  35  * @author Bernd Hufmann
  36  */
  37 abstract public class BaseControlViewHandler extends AbstractHandler {
  38
  39     // ------------------------------------------------------------------------
  40     // Attributes
  41     // ------------------------------------------------------------------------
  42     /**
  43      * The synchronization lock.
  44      */
  45     final protected ReentrantLock fLock = new ReentrantLock();
  46
  47     // ------------------------------------------------------------------------
  48     // Operations
  49     // ------------------------------------------------------------------------
  50     /**
  51      * @return returns the workbench page for the Control View
  52      */
  53     protected IWorkbenchPage getWorkbenchPage() {
  54         // Check if we are closing down
  55         IWorkbenchWindow window = PlatformUI.getWorkbench().getActiveWorkbenchWindow();
  56         if (window == null) {
  57             return null;
  58         }
  59
  60         // Check if we are in the Project View
  61         IWorkbenchPage page = window.getActivePage();
  62         if (page == null) {
  63             return null;
  64         }
  65
  66         IWorkbenchPart part = page.getActivePart();
  67         if (!(part instanceof ControlView)) {
  68             return null;
  69         }
  70         return page;
  71     }
  72
  73     /**
  74      * Refreshes the session information based on given session (in CommandParameter)
  75      * @param param - command parameter containing the session to refresh
  76      */
  77     protected void refresh(final CommandParameter param) {
  78         Job job = new Job(Messages.TraceControl_RetrieveNodeConfigurationJob) {
  79
  80             @Override
  81             protected IStatus run(IProgressMonitor monitor) {
  82                 try {
  83                     param.getSession().getConfigurationFromNode(monitor);
  84                 } catch (ExecutionException e) {
  85                     return new Status(Status.ERROR, Activator.PLUGIN_ID, Messages.TraceControl_ListSessionFailure, e);
  86                 }
  87                 return Status.OK_STATUS;
  88             }
  89         };
  90         job.setUser(true);
  91         job.schedule();
  92     }
  93
  94 }