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.IWorkbenchPart;
  37 import org.eclipse.ui.IWorkbenchWindow;
  38 import org.eclipse.ui.PlatformUI;
  39
  40 /**
  41  * <b><u>CreateChannelOnSessionHandler</u></b>
  42  * <p>
  43  * Command handler implementation to create a trace channel for unknown domain
  44  * (on session level).
  45  * </p>
  46  */
  47 public class CreateChannelOnSessionHandler extends BaseControlViewHandler {
  48
  49     // ------------------------------------------------------------------------
  50     // Attributes
  51     // ------------------------------------------------------------------------
  52     /**
  53      * The session component the command is to be executed on.
  54      */
  55     private TraceSessionComponent fSession = null;
  56
  57     // ------------------------------------------------------------------------
  58     // Operations
  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
  73         final ICreateChannelOnSessionDialog dialog = new CreateChannelDialog(window.getShell());
  74
  75         if (dialog.open() != Window.OK) {
  76             return null;
  77         }
  78
  79         Job job = new Job(Messages.TraceControl_ChangeChannelStateJob) {
  80             @Override
  81             protected IStatus run(IProgressMonitor monitor) {
  82                 String errorString = null;
  83
  84                 List<String> channelNames = new ArrayList<String>();
  85                 TraceDomainComponent newDomain = new TraceDomainComponent("dummy", fSession); //$NON-NLS-1$
  86                 channelNames.add(dialog.getChannelInfo().getName());
  87                 newDomain.setIsKernel(dialog.isKernel());
  88
  89                 try {
  90                     newDomain.enableChannels(channelNames, dialog.getChannelInfo(), monitor);
  91                 } catch (ExecutionException e) {
  92                     if (errorString == null) {
  93                         errorString = new String();
  94                     }
  95                     errorString += e.toString() + "\n"; //$NON-NLS-1$
  96                 }
  97
  98                 // get session configuration in all cases
  99                 try {
 100                     fSession.getConfigurationFromNode(monitor);
 101                 } catch (ExecutionException e) {
 102                     if (errorString == null) {
 103                         errorString = new String();
 104                     }
 105                     errorString += Messages.TraceControl_ListSessionFailure + ": " + e.toString();  //$NON-NLS-1$
 106                 }
 107
 108                 if (errorString != null) {
 109                     return new Status(Status.ERROR, LTTngUiPlugin.PLUGIN_ID, errorString);
 110                 }
 111                 return Status.OK_STATUS;
 112             }
 113         };
 114         job.setUser(true);
 115         job.schedule();
 116
 117         return null;
 118     }
 119
 120     /*
 121      * (non-Javadoc)
 122      * @see org.eclipse.core.commands.AbstractHandler#isEnabled()
 123      */
 124     @Override
 125     public boolean isEnabled() {
 126         // Get workbench page for the Control View
 127         IWorkbenchPage page = getWorkbenchPage();
 128         if (page == null) {
 129             return false;
 130         }
 131
 132         fSession = null;
 133
 134         // Check if one session is selected
 135         ISelection selection = page.getSelection(ControlView.ID);
 136         if (selection instanceof StructuredSelection) {
 137             StructuredSelection structered = ((StructuredSelection) selection);
 138             for (Iterator<?> iterator = structered.iterator(); iterator.hasNext();) {
 139                 Object element = (Object) iterator.next();
 140                 if (element instanceof TraceSessionComponent) {
 141                     // Add only TraceSessionComponents that are inactive and not destroyed
 142                     TraceSessionComponent session = (TraceSessionComponent) element;
 143                     if ((session.getSessionState() == TraceSessionState.INACTIVE) && (!session.isDestroyed())) {
 144                         fSession = session;
 145                     }
 146                 }
 147             }
 148         }
 149         return fSession != null;
 150     }
 151 }