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 org.apache.commons.lang3.builder.ToStringBuilder;
  
  import at.o2xfs.common.Assert;
  import at.o2xfs.xfs.WFSResult;
  import at.o2xfs.xfs.XfsException;
  import at.o2xfs.xfs.service.XfsService;
  import at.o2xfs.xfs.service.XfsServiceManager;
  import at.o2xfs.xfs.service.events.XfsEventNotification;
  import at.o2xfs.xfs.type.RequestId;
  
  /**
   * @author Andreas Fagschlunger
   */
  public abstract class XfsCommand implements Callable<WFSResult> {
  
  	private final XfsService xfsService;
  
  	private final Long timeOut;
  
  	private RequestId requestId = null;
  
  	public XfsCommand(final XfsService xfsService, Long timeOut) {
  		Assert.notNull(xfsService);
  		this.xfsService = xfsService;
  		this.timeOut = timeOut;
  	}
  
  	public Long getTimeOut() {
  		return timeOut;
  	}
  
  	public void execute(final XfsEventNotification xfsEventNotification)
  			throws XfsException {
  		synchronized (this) {
  			if (requestId != null) {
  				throw new IllegalStateException("already executed");
  			}
  			requestId = XfsServiceManager.getInstance().execute(this,
  					xfsEventNotification);
  		}
  	}
  
  	public void cancel() throws XfsException {
  		synchronized (this) {
  			if (requestId != null) {
  				XfsServiceManager.getInstance().cancel(xfsService, requestId);
  			}
  		}
  	}
  
  	/**
  	 * @see java.util.concurrent.Callable#call()
  	 */
  	@Override
  	public WFSResult call() throws XfsException {
  		return new XfsCallable(this).call();
  	}
  
  	/**
  	 * @return the xfsDevice
  	 */
  	public XfsService getXFSService() {
  		return xfsService;
  	}
  
  	@Override
  	public String toString() {
  		return new ToStringBuilder(this).append("xfsService", xfsService)
  				.append("requestId", requestId).toString();
  	}
  }