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

   1 /**********************************************************************
   2  * Copyright (c) 2012, 2014 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.tracecompass.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.tracecompass.internal.lttng2.control.core.model.TargetNodeState;
  17 import org.eclipse.tracecompass.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             root.removeChild(fTargetNode);
  39         } finally {
  40             fLock.unlock();
  41         }
  42         return null;
  43     }
  44
  45     @Override
  46     public boolean isEnabled() {
  47         boolean isEnabled = false;
  48         fLock.lock();
  49         try {
  50            isEnabled = (super.isEnabled() && (fTargetNode.getTargetNodeState() == TargetNodeState.DISCONNECTED));
  51         } finally {
  52             fLock.unlock();
  53         }
  54         return isEnabled;
  55      }
  56 }