001    /*
002      GRANITE DATA SERVICES
003      Copyright (C) 2012 GRANITE DATA SERVICES S.A.S.
004    
005      This file is part of Granite Data Services.
006    
007      Granite Data Services is free software; you can redistribute it and/or modify
008      it under the terms of the GNU Library General Public License as published by
009      the Free Software Foundation; either version 2 of the License, or (at your
010      option) any later version.
011    
012      Granite Data Services is distributed in the hope that it will be useful, but
013      WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
014      FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License
015      for more details.
016    
017      You should have received a copy of the GNU Library General Public License
018      along with this library; if not, see <http://www.gnu.org/licenses/>.
019    */
020    
021    package org.granite.client.tide.impl;
022    
023    import java.util.concurrent.ExecutionException;
024    import java.util.concurrent.Future;
025    import java.util.concurrent.TimeUnit;
026    import java.util.concurrent.TimeoutException;
027    
028    import org.granite.client.messaging.channel.ResponseMessageFuture;
029    import org.granite.client.tide.server.ComponentListener;
030    
031    /**
032     * @author William DRAI
033     */
034    public class FutureResult<T> implements Future<T> {
035        
036            private ResponseMessageFuture responseMessageFuture;
037        private ComponentListener<T> componentListener;
038        
039        public FutureResult(ResponseMessageFuture responseMessageFuture, ComponentListener<T> componentListener) {
040            this.responseMessageFuture = responseMessageFuture;
041            this.componentListener = componentListener;
042        }
043    
044        @Override
045        public boolean cancel(boolean mayInterruptIfRunning) {
046            return responseMessageFuture.cancel();
047        }
048    
049        @Override
050        public boolean isCancelled() {
051            return responseMessageFuture.isCancelled();
052        }
053    
054        @Override
055        public boolean isDone() {
056            return responseMessageFuture.isDone();
057        }
058    
059            @Override
060        public T get() throws InterruptedException, ExecutionException {
061                    try {
062                            responseMessageFuture.get();
063                    }
064                    catch (TimeoutException e) {
065                            throw new InterruptedException("Request timeout: " + e.getMessage());
066                    }
067                    return componentListener.getResult();
068        }
069            
070        @Override
071        public T get(long timeout, TimeUnit unit) throws InterruptedException, ExecutionException, TimeoutException {
072                    throw new UnsupportedOperationException("Cannot use timeout on get(), set timeout on request");
073        }
074    
075    }