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