org.eclipse.linuxtools.lttng2.control.ui/src/org/eclipse/linuxtools/internal/lttng2/control/ui/views/handlers/ConnectHandler.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
  18 /**
  19  * <p>
  20  * Command handler implementation to connect to a target host.
  21  * </p>
  22  *
  23  * @author Bernd Hufmann
  24  */
  25 public class ConnectHandler extends BaseNodeHandler {
  26
  27     // ------------------------------------------------------------------------
  28     // Operations
  29     // ------------------------------------------------------------------------
  30
  31     @Override
  32     public Object execute(ExecutionEvent event) throws ExecutionException {
  33         fLock.lock();
  34         try {
  35             fTargetNode.connect();
  36         } finally {
  37             fLock.unlock();
  38         }
  39         return null;
  40     }
  41
  42     @Override
  43     public boolean isEnabled() {
  44         boolean isEnabled = false;
  45         fLock.lock();
  46         try {
  47            isEnabled = (super.isEnabled() && (fTargetNode.getTargetNodeState() == TargetNodeState.DISCONNECTED));
  48         } finally {
  49             fLock.unlock();
  50         }
  51         return isEnabled;
  52      }
  53 }