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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License 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 org.apache.flink.runtime.rpc.messages;

import static org.apache.flink.util.Preconditions.checkNotNull;
import static org.apache.flink.util.Preconditions.checkArgument;

/**
 * Message for asynchronous runnable invocations
 */
public final class RunAsync {

	/** The runnable to be executed. Transient, so it gets lost upon serialization */
	private final Runnable runnable;

	/** The delay after which the runnable should be called */
	private final long atTimeNanos;

	/**
	 * Creates a new {@code RunAsync} message.
	 * 
	 * @param runnable    The Runnable to run.
	 * @param atTimeNanos The time (as for System.nanoTime()) when to execute the runnable.
	 */
	public RunAsync(Runnable runnable, long atTimeNanos) {
		checkArgument(atTimeNanos >= 0);
		this.runnable = checkNotNull(runnable);
		this.atTimeNanos = atTimeNanos;
	}

	public Runnable getRunnable() {
		return runnable;
	}

	public long getTimeNanos() {
		return atTimeNanos;
	}
}