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package com.netease.cloud.services.nos.transfer.internal;

import java.util.concurrent.Future;

/**
 * Monitors long-running transfers.
 */
public interface TransferMonitor {

	/**
	 * Returns a Future to wait on. Calling get() on this future will block
	 * while the transfer progress is checked, but its return does not guarantee
	 * the transfer is complete. Call isDone() to check for completion. Repeated
	 * calls to getFuture() can return different objects.
	 */
	public Future getFuture();

	/**
	 * Returns whether the transfer is completed. A failure or cancellation
	 * counts as completion as well; to gather any exceptions thrown, call
	 * getFuture().get()
	 */
	public boolean isDone();

}