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