org.eclipse.linuxtools.lttng2.ui/src/org/eclipse/linuxtools/internal/lttng2/ui/views/control/handlers/ConnectHandler.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.internal.lttng2.ui.views.control.handlers;
  13
  14 import org.eclipse.core.commands.ExecutionEvent;
  15 import org.eclipse.core.commands.ExecutionException;
  16 import org.eclipse.linuxtools.internal.lttng2.core.control.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     /*
  32      * (non-Javadoc)
  33      * @see org.eclipse.linuxtools.internal.lttng2.ui.views.control.handlers.BaseNodeHandler#execute(org.eclipse.core.commands.ExecutionEvent)
  34      */
  35     @Override
  36     public Object execute(ExecutionEvent event) throws ExecutionException {
  37         fLock.lock();
  38         try {
  39             fTargetNode.connect();
  40         } finally {
  41             fLock.unlock();
  42         }
  43         return null;
  44     }
  45
  46     /*
  47      * (non-Javadoc)
  48      * @see org.eclipse.linuxtools.internal.lttng2.ui.views.control.handlers.BaseNodeHandler#isEnabled()
  49      */
  50     @Override
  51     public boolean isEnabled() {
  52         boolean isEnabled = false;
  53         fLock.lock();
  54         try {
  55            isEnabled = (super.isEnabled() && (fTargetNode.getTargetNodeState() == TargetNodeState.DISCONNECTED));
  56         } finally {
  57             fLock.unlock();
  58         }
  59         return isEnabled;
  60      }
  61 }