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    • com.netease.cloud.services.nos.transfer.internal.MultipleFileTransferMonitor Maven / Gradle / Ivy

    The newest version!
    package com.netease.cloud.services.nos.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.netease.cloud.services.nos.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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