org.eclipse.linuxtools.lttng2.control.ui/src/org/eclipse/linuxtools/internal/lttng2/control/ui/views/handlers/DeleteHandler.java

   1 /**********************************************************************
   2  * Copyright (c) 2012, 2013 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.control.ui.views.handlers;
  13
  14 import org.eclipse.core.commands.ExecutionEvent;
  15 import org.eclipse.core.commands.ExecutionException;
  16 import org.eclipse.linuxtools.internal.lttng2.control.core.model.TargetNodeState;
  17 import org.eclipse.linuxtools.internal.lttng2.control.ui.views.model.ITraceControlComponent;
  18
  19 /**
  20  * <p>
  21  * Command handler implementation to delete a target host.
  22  * </p>
  23  *
  24  * @author Bernd Hufmann
  25  */
  26 public class DeleteHandler extends BaseNodeHandler {
  27
  28     // ------------------------------------------------------------------------
  29     // Operations
  30     // ------------------------------------------------------------------------
  31
  32     @Override
  33     public Object execute(ExecutionEvent event) throws ExecutionException {
  34         fLock.lock();
  35         try {
  36             ITraceControlComponent root = fTargetNode.getParent();
  37             fTargetNode.removeAllChildren();
  38             fTargetNode.deregister();
  39             root.removeChild(fTargetNode);
  40         } finally {
  41             fLock.unlock();
  42         }
  43         return null;
  44     }
  45
  46     @Override
  47     public boolean isEnabled() {
  48         boolean isEnabled = false;
  49         fLock.lock();
  50         try {
  51            isEnabled = (super.isEnabled() && (fTargetNode.getTargetNodeState() == TargetNodeState.DISCONNECTED));
  52         } finally {
  53             fLock.unlock();
  54         }
  55         return isEnabled;
  56      }
  57 }