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.ui.views.control.model.TargetNodeState;
  17
  18 /**
  19  * <b><u>ConnectHandler</u></b>
  20  * <p>
  21  * Command handler implementation to connect to a target host.
  22  * </p>
  23  */
  24 public class ConnectHandler extends BaseNodeHandler {
  25
  26     // ------------------------------------------------------------------------
  27     // Operations
  28     // ------------------------------------------------------------------------
  29
  30     /*
  31      * (non-Javadoc)
  32      * @see org.eclipse.linuxtools.internal.lttng2.ui.views.control.handlers.BaseNodeHandler#execute(org.eclipse.core.commands.ExecutionEvent)
  33      */
  34     @Override
  35     public Object execute(ExecutionEvent event) throws ExecutionException {
  36         fLock.lock();
  37         try {
  38             fTargetNode.connect();
  39         } finally {
  40             fLock.unlock();
  41         }
  42         return null;
  43     }
  44
  45     /*
  46      * (non-Javadoc)
  47      * @see org.eclipse.linuxtools.internal.lttng2.ui.views.control.handlers.BaseNodeHandler#isEnabled()
  48      */
  49     @Override
  50     public boolean isEnabled() {
  51         boolean isEnabled = false;
  52         fLock.lock();
  53         try {
  54            isEnabled = (super.isEnabled() && (fTargetNode.getTargetNodeState() == TargetNodeState.DISCONNECTED));
  55         } finally {
  56             fLock.unlock();
  57         }
  58         return isEnabled;
  59      }
  60 }