org.eclipse.linuxtools.lttng.ui/src/org/eclipse/linuxtools/lttng/ui/views/control/handlers/CreateChannelOnSessionHandler.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.lttng.ui.views.control.handlers;
  13
  14 import java.util.ArrayList;
  15 import java.util.Iterator;
  16 import java.util.List;
  17
  18 import org.eclipse.core.commands.AbstractHandler;
  19 import org.eclipse.core.commands.ExecutionEvent;
  20 import org.eclipse.core.commands.ExecutionException;
  21 import org.eclipse.core.runtime.IProgressMonitor;
  22 import org.eclipse.core.runtime.IStatus;
  23 import org.eclipse.core.runtime.Status;
  24 import org.eclipse.core.runtime.jobs.Job;
  25 import org.eclipse.jface.viewers.ISelection;
  26 import org.eclipse.jface.viewers.StructuredSelection;
  27 import org.eclipse.jface.window.Window;
  28 import org.eclipse.linuxtools.lttng.ui.LTTngUiPlugin;
  29 import org.eclipse.linuxtools.lttng.ui.views.control.ControlView;
  30 import org.eclipse.linuxtools.lttng.ui.views.control.Messages;
  31 import org.eclipse.linuxtools.lttng.ui.views.control.dialogs.CreateChannelDialog;
  32 import org.eclipse.linuxtools.lttng.ui.views.control.dialogs.ICreateChannelOnSessionDialog;
  33 import org.eclipse.linuxtools.lttng.ui.views.control.model.TraceSessionState;
  34 import org.eclipse.linuxtools.lttng.ui.views.control.model.impl.TraceDomainComponent;
  35 import org.eclipse.linuxtools.lttng.ui.views.control.model.impl.TraceSessionComponent;
  36 import org.eclipse.ui.IWorkbenchPage;
  37 import org.eclipse.ui.IWorkbenchPart;
  38 import org.eclipse.ui.IWorkbenchWindow;
  39 import org.eclipse.ui.PlatformUI;
  40
  41 /**
  42  * <b><u>CreateChannelOnSessionHandler</u></b>
  43  * <p>
  44  * Command handler implementation to create a trace channel for unknown domain
  45  * (on session level).
  46  * </p>
  47  */
  48 public class CreateChannelOnSessionHandler extends AbstractHandler {
  49
  50     // ------------------------------------------------------------------------
  51     // Attributes
  52     // ------------------------------------------------------------------------
  53     /**
  54      * The session component the command is to be executed on.
  55      */
  56     private TraceSessionComponent fSession = null;
  57
  58     // ------------------------------------------------------------------------
  59     // Operations
  60     // ------------------------------------------------------------------------
  61     /*
  62      * (non-Javadoc)
  63      * @see org.eclipse.core.commands.AbstractHandler#execute(org.eclipse.core.commands.ExecutionEvent)
  64      */
  65     @Override
  66     public Object execute(ExecutionEvent event) throws ExecutionException {
  67
  68         final IWorkbenchWindow window = PlatformUI.getWorkbench().getActiveWorkbenchWindow();
  69
  70         if (window == null) {
  71             return false;
  72         }
  73
  74         final ICreateChannelOnSessionDialog dialog = new CreateChannelDialog(window.getShell());
  75
  76         if (dialog.open() != Window.OK) {
  77             return null;
  78         }
  79
  80         Job job = new Job(Messages.TraceControl_ChangeChannelStateJob) {
  81             @Override
  82             protected IStatus run(IProgressMonitor monitor) {
  83                 String errorString = null;
  84
  85                 List<String> channelNames = new ArrayList<String>();
  86                 TraceDomainComponent newDomain = new TraceDomainComponent("dummy", fSession); //$NON-NLS-1$
  87                 channelNames.add(dialog.getChannelInfo().getName());
  88                 newDomain.setIsKernel(dialog.isKernel());
  89
  90                 try {
  91                     newDomain.enableChannels(channelNames, dialog.getChannelInfo(), monitor);
  92                 } catch (ExecutionException e) {
  93                     if (errorString == null) {
  94                         errorString = new String();
  95                     }
  96                     errorString += e.toString() + "\n"; //$NON-NLS-1$
  97                 }
  98
  99                 // get session configuration in all cases
 100                 try {
 101                     fSession.getConfigurationFromNode(monitor);
 102                 } catch (ExecutionException e) {
 103                     if (errorString == null) {
 104                         errorString = new String();
 105                     }
 106                     errorString += Messages.TraceControl_ListSessionFailure + ": " + e.toString();  //$NON-NLS-1$
 107                 }
 108
 109                 if (errorString != null) {
 110                     return new Status(Status.ERROR, LTTngUiPlugin.PLUGIN_ID, errorString);
 111                 }
 112                 return Status.OK_STATUS;
 113             }
 114         };
 115         job.setUser(true);
 116         job.schedule();
 117
 118         return null;
 119     }
 120
 121     /*
 122      * (non-Javadoc)
 123      * @see org.eclipse.core.commands.AbstractHandler#isEnabled()
 124      */
 125     @Override
 126     public boolean isEnabled() {
 127         fSession = null;
 128
 129         // Check if we are closing down
 130         IWorkbenchWindow window = PlatformUI.getWorkbench().getActiveWorkbenchWindow();
 131         if (window == null) {
 132             return false;
 133         }
 134
 135         // Check if we are in the Project View
 136         IWorkbenchPage page = window.getActivePage();
 137         if (page == null) {
 138             return false;
 139         }
 140
 141         IWorkbenchPart part = page.getActivePart();
 142         if (!(part instanceof ControlView)) {
 143             return false;
 144         }
 145
 146         // Check if one session is selected
 147         ISelection selection = page.getSelection(ControlView.ID);
 148         if (selection instanceof StructuredSelection) {
 149             StructuredSelection structered = ((StructuredSelection) selection);
 150             for (Iterator<?> iterator = structered.iterator(); iterator.hasNext();) {
 151                 Object element = (Object) iterator.next();
 152                 if (element instanceof TraceSessionComponent) {
 153                     // Add only TraceSessionComponents that are inactive and not destroyed
 154                     TraceSessionComponent session = (TraceSessionComponent) element;
 155                     if ((session.getSessionState() == TraceSessionState.INACTIVE) && (!session.isDestroyed())) {
 156                         fSession = session;
 157                     }
 158                 }
 159             }
 160         }
 161         return fSession != null;
 162     }
 163 }