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    • com.amazonaws.services.s3.transfer.internal.MultipleFileTransferMonitor Maven / Gradle / Ivy

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    The Amazon Web Services SDK for Java provides Java APIs for building software on AWS' cost-effective, scalable, and reliable infrastructure products. The AWS Java SDK allows developers to code against APIs for all of Amazon's infrastructure web services (Amazon S3, Amazon EC2, Amazon SQS, Amazon Relational Database Service, Amazon AutoScaling, etc).

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    /*
 * Copyright 2012-2014 Amazon Technologies, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at:
 *
 *    http://aws.amazon.com/apache2.0
 *
 * This file is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES
 * OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and
 * limitations under the License.
 */
package com.amazonaws.services.s3.transfer.internal;

import java.util.Collection;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;

import com.amazonaws.services.s3.transfer.Transfer;

public class MultipleFileTransferMonitor implements TransferMonitor {

    private final Collection subTransfers;
    private final AbstractTransfer transfer;
    private final Future future;

    public MultipleFileTransferMonitor(AbstractTransfer transfer, Collection subTransfers) {
        this.subTransfers = subTransfers;
        this.transfer = transfer;

        /*
         * The future object is not publicly exposed, so we only need to worry
         * about implementing get(). The other methods are implemented badly,
         * just to meet the interface contract.
         */
        this.future = new Future() {

            @Override
            public boolean cancel(boolean mayInterruptIfRunning) {
                return true;
            }

            @Override
            public Object get() throws InterruptedException, ExecutionException {
                Object result = null;
                for ( AbstractTransfer download : MultipleFileTransferMonitor.this.subTransfers ) {
                    result = download.getMonitor().getFuture().get();
                }
                return result;
            }

            @Override
            public Object get(long timeout, TimeUnit unit) throws InterruptedException, ExecutionException,
                    TimeoutException {
                Object result = null;
                for ( AbstractTransfer subTransfer : MultipleFileTransferMonitor.this.subTransfers ) {
                    result = subTransfer.getMonitor().getFuture().get(timeout, unit);
                }
                return result;
            }

            @Override
            public boolean isCancelled() {
                return MultipleFileTransferMonitor.this.transfer.getState() == Transfer.TransferState.Canceled;
            }

            @Override
            public boolean isDone() {
                return MultipleFileTransferMonitor.this.isDone();
            }            
        };
    }

    @Override
    public Future getFuture() {
        return future;
    }

    @Override
    public synchronized boolean isDone() {
        for ( Transfer subTransfer : subTransfers ) {
            if ( !subTransfer.isDone() )
                return false;
        }
        return true;
    }

    
}
    
    
    
    

    




    
    
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