package ejava.examples.asyncmarket.ejb;
   
   import java.text.DateFormat;
   import java.text.SimpleDateFormat;
   import java.util.Date;
   import java.util.concurrent.Future;
   
   import javax.ejb.AsyncResult;
   import javax.ejb.Asynchronous;
  import javax.ejb.Stateless;
  
  import org.apache.commons.logging.Log;
  import org.apache.commons.logging.LogFactory;
  
  /**
   * This class contains some demo methods to perform example actions on 
   * behalf of the AuctionMgmtEJB.
   */
  @Stateless
  public class AuctionMgmtActionEJB {
  	private static Log log = LogFactory.getLog(AuctionMgmtActionEJB.class);
  	
      /**
       * Perform action synchronously while caller waits.
       */
  	public Date doWorkSync(long delay) {
  		DateFormat df = new SimpleDateFormat("HH:mm:ss.SSS");
  		log.debug(String.format("sync method %d starting %d delay at %s", Thread.currentThread().getId(), delay, df.format(new Date())));
  		try { Thread.sleep(delay); }
  		catch (Exception ex) {
  			log.error("unexpected error during sleep:", ex);
  		}
  		Date now = new Date();
  		log.debug(String.format("sync method %d completed %d delay at %s", Thread.currentThread().getId(), delay, df.format(now)));
  		
  		return now;
  	}    
  
  	/**
  	 * Perform action async from caller.
  	 */
  	@Asynchronous
  	public Future<Date> doWorkAsync(long delay) {
  		DateFormat df = new SimpleDateFormat("HH:mm:ss.SSS");
  		log.debug(String.format("async method %d starting %d delay at %s", Thread.currentThread().getId(), delay, df.format(new Date())));
  		try { Thread.sleep(delay); }
  		catch (Exception ex) {
  			log.error("unexpected error during sleep:", ex);
  		}
  		Date now = new Date();
  		log.debug(String.format("async method %d completed %d delay at %s", Thread.currentThread().getId(), delay, df.format(now)));
  		
  		return new AsyncResult<Date>(now);
  	}    
  
  }