org.eclipse.linuxtools.lttng.ui/src/org/eclipse/linuxtools/lttng/ui/views/control/handlers/CreateChannelOnDomainHandler.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.ICreateChannelDialog;
  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>CreateChannelOnDomainHandler</u></b>
  43  * <p>
  44  * Command handler implementation to create a trace channel for known domain.
  45  * </p>
  46  */
  47 public class CreateChannelOnDomainHandler extends AbstractHandler {
  48
  49     // ------------------------------------------------------------------------
  50     // Attributes
  51     // ------------------------------------------------------------------------
  52     /**
  53      * The the domain component the command is to be executed on.
  54      */
  55     private TraceDomainComponent fDomain;
  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         // Get channel information from user
  74         final ICreateChannelDialog dialog = new CreateChannelDialog(window.getShell(), fDomain);
  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                 channelNames.add(dialog.getChannelInfo().getName());
  87
  88                 try {
  89                     fDomain.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                     fDomain.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
 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         fDomain = null;
 127
 128         // Check if we are closing down
 129         IWorkbenchWindow window = PlatformUI.getWorkbench().getActiveWorkbenchWindow();
 130         if (window == null) {
 131             return false;
 132         }
 133
 134         // Check if we are in the Project View
 135         IWorkbenchPage page = window.getActivePage();
 136         if (page == null) {
 137             return false;
 138         }
 139
 140         IWorkbenchPart part = page.getActivePart();
 141         if (!(part instanceof ControlView)) {
 142             return false;
 143         }
 144
 145         // Check if one domain is selected
 146         ISelection selection = page.getSelection(ControlView.ID);
 147         if (selection instanceof StructuredSelection) {
 148             StructuredSelection structered = ((StructuredSelection) selection);
 149             for (Iterator<?> iterator = structered.iterator(); iterator.hasNext();) {
 150                 Object element = (Object) iterator.next();
 151                 if (element instanceof TraceDomainComponent) {
 152                     TraceDomainComponent domain = (TraceDomainComponent) element;
 153                     TraceSessionComponent session = (TraceSessionComponent) domain.getParent();
 154                     // Add only TraceDomainComponent whose TraceSessionComponent parent is inactive and not destroyed
 155                     if ((session.getSessionState() == TraceSessionState.INACTIVE) && (!session.isDestroyed())) {
 156                         fDomain = domain;
 157                     }
 158                 }
 159             }
 160         }
 161         return fDomain != null;
 162     }
 163 }