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