/*
* 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.streaming.api.operators.async.queue;
import org.apache.flink.annotation.Internal;
import org.apache.flink.runtime.concurrent.Future;
import org.apache.flink.runtime.concurrent.impl.FlinkCompletableFuture;
import org.apache.flink.streaming.api.watermark.Watermark;
/**
* {@link StreamElementQueueEntry} implementation for the {@link Watermark}.
*/
@Internal
public class WatermarkQueueEntry extends StreamElementQueueEntry<Watermark> implements AsyncWatermarkResult {
private final Future<Watermark> future;
public WatermarkQueueEntry(Watermark watermark) {
super(watermark);
this.future = FlinkCompletableFuture.completed(watermark);
}
@Override
public Watermark getWatermark() {
return (Watermark) getStreamElement();
}
@Override
protected Future<Watermark> getFuture() {
return future;
}
}