content: /*
   * Copyright (c) 2017, Andreas Fagschlunger. All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   *   - Redistributions of source code must retain the above copyright
   *     notice, this list of conditions and the following disclaimer.
   *
   *   - Redistributions in binary form must reproduce the above copyright
   *     notice, this list of conditions and the following disclaimer in the
   *     documentation and/or other materials provided with the distribution.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
   * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
   * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
   * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
   * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
   * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
   * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
   * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
   * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
   * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  package at.o2xfs.xfs.service.cmd;
  
  import java.util.concurrent.Callable;
  
  import at.o2xfs.log.Logger;
  import at.o2xfs.log.LoggerFactory;
  import at.o2xfs.xfs.WFSResult;
  import at.o2xfs.xfs.XfsException;
  import at.o2xfs.xfs.service.XfsServiceManager;
  import at.o2xfs.xfs.service.events.XfsEventNotification;
  
  /**
   * @author Andreas Fagschlunger
   */
  public class XfsCallable implements Callable<WFSResult>, XfsEventNotification {
  
  	private final static Logger LOG = LoggerFactory
  			.getLogger(XfsCallable.class);
  
  	private final XfsCommand xfsCommand;
  
  	private WFSResult wfsResult = null;
  
  	public XfsCallable(final XfsCommand xfsCommand) {
  		this.xfsCommand = xfsCommand;
  	}
  
  	@Override
  	public WFSResult call() throws XfsException {
  		final String method = "call()";
  		try {
  			synchronized (this) {
  				xfsCommand.execute(this);
  				while (wfsResult == null) {
  					if (LOG.isDebugEnabled()) {
  						LOG.debug(method, "Waiting ...");
  					}
  					wait();
  				}
  			}
  			XfsException.throwFor(wfsResult.getResult());
  		} catch (final XfsException e) {
  			XfsServiceManager.getInstance().free(wfsResult);
  			throw e;
  		} catch (InterruptedException e) {
  			LOG.error(method, "Interrupted while waiting", e);
  			throw new RuntimeException(e);
  		}
  		return wfsResult;
  	}
  
  	@Override
  	public void fireIntermediateEvent(WFSResult wfsResult) {
  		final String method = "fireIntermediateEvent(WFSResult)";
  		if (LOG.isWarnEnabled()) {
  			LOG.warn(method, "Intermediate event occurred: " + wfsResult);
  		}
  		XfsServiceManager.getInstance().free(wfsResult);
  	}
  
  	/**
  	 * @see at.o2xfs.xfs.service.events.XfsEventNotification#fireOperationCompleteEvent
  	 *      (at.o2xfs.xfs.WFSResult)
  	 */
  	@Override
  	public void fireOperationCompleteEvent(final WFSResult wfsResult) {
  		final String method = "fireOperationCompleteEvent(WFSResult)";
  		if (LOG.isDebugEnabled()) {
  			LOG.debug(method, "wfsResult=" + wfsResult);
  		}
  		synchronized (this) {
  			this.wfsResult = wfsResult;
  			notifyAll();
  		}
  	}
  }