org.eclipse.linuxtools.lttng2.control.ui/src/org/eclipse/linuxtools/internal/lttng2/control/ui/views/handlers/BaseAddContextHandler.java

   1 /**********************************************************************
   2  * Copyright (c) 2012, 2013 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.control.ui.views.handlers;
  13
  14 import java.util.List;
  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.window.Window;
  23 import org.eclipse.linuxtools.internal.lttng2.control.ui.Activator;
  24 import org.eclipse.linuxtools.internal.lttng2.control.ui.views.dialogs.IAddContextDialog;
  25 import org.eclipse.linuxtools.internal.lttng2.control.ui.views.dialogs.TraceControlDialogFactory;
  26 import org.eclipse.linuxtools.internal.lttng2.control.ui.views.messages.Messages;
  27 import org.eclipse.ui.IWorkbenchWindow;
  28 import org.eclipse.ui.PlatformUI;
  29 import org.eclipse.ui.progress.UIJob;
  30
  31 /**
  32  * <p>
  33  * Base command handler implementation to add contexts.
  34  * </p>
  35  *
  36  * @author Bernd Hufmann
  37  */
  38 public abstract class BaseAddContextHandler extends BaseControlViewHandler {
  39
  40     // ------------------------------------------------------------------------
  41     // Attributes
  42     // ------------------------------------------------------------------------
  43
  44     /**
  45      * The command execution parameter.
  46      */
  47     protected CommandParameter fParam = null;
  48
  49     // ------------------------------------------------------------------------
  50     // Operations
  51     // ------------------------------------------------------------------------
  52
  53     /**
  54      * Adds contexts to channel(s) and/or event(s)
  55      *
  56      * @param param
  57      *            - a parameter instance with data for the command execution
  58      * @param contextNames
  59      *            - list contexts to add
  60      * @param monitor
  61      *            - a progress monitor
  62      * @throws ExecutionException
  63      *             If something goes wrong
  64      */
  65     public abstract void addContexts(CommandParameter param, List<String> contextNames, IProgressMonitor monitor) throws ExecutionException;
  66
  67     @Override
  68     public Object execute(ExecutionEvent event) throws ExecutionException {
  69
  70         final IWorkbenchWindow window = PlatformUI.getWorkbench().getActiveWorkbenchWindow();
  71
  72         if (window == null) {
  73             return false;
  74         }
  75         fLock.lock();
  76         try {
  77             // Make a copy for thread safety
  78             final CommandParameter param = fParam.clone();
  79
  80             UIJob getJob = new UIJob(Messages.TraceControl_GetContextJob) {
  81                 @Override
  82                 public IStatus runInUIThread(IProgressMonitor monitor) {
  83
  84                     try {
  85                         final List<String> availableContexts = param.getSession().getContextList(monitor);
  86                         final IAddContextDialog dialog = TraceControlDialogFactory.getInstance().getAddContextDialog();
  87                         dialog.setAvalibleContexts(availableContexts);
  88
  89                         if ((dialog.open() != Window.OK) || (dialog.getContexts().isEmpty())) {
  90                             return Status.OK_STATUS;
  91                         }
  92
  93                         Job addJob = new Job(Messages.TraceControl_AddContextJob) {
  94                             @Override
  95                             protected IStatus run(IProgressMonitor monitor2) {
  96                                 Exception error = null;
  97
  98                                 try {
  99                                     List<String> contextNames = dialog.getContexts();
 100                                     addContexts(param, contextNames, monitor2);
 101
 102                                 } catch (ExecutionException e) {
 103                                     error = e;
 104                                 }
 105
 106                                 // get session configuration in all cases
 107                                 refresh(param);
 108
 109                                 if (error != null) {
 110                                     return new Status(IStatus.ERROR, Activator.PLUGIN_ID, Messages.TraceControl_AddContextFailure, error);
 111                                 }
 112                                 return Status.OK_STATUS;
 113                             }
 114                         };
 115                         addJob.setUser(true);
 116                         addJob.schedule();
 117                     } catch (ExecutionException e) {
 118                         return new Status(IStatus.ERROR, Activator.PLUGIN_ID, Messages.TraceControl_GetContextFailure, e);
 119                     }
 120
 121                     return Status.OK_STATUS;
 122                 }
 123             };
 124             getJob.setUser(false);
 125             getJob.schedule();
 126
 127         } finally {
 128             fLock.unlock();
 129         }
 130         return null;
 131     }
 132 }