org.apache.flink.runtime.io.network.partition.NoOpResultSubpartitionView Maven / Gradle / Ivy

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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.io.network.partition;

import javax.annotation.Nullable;

/**
 * A dummy implementation of the {@link ResultSubpartitionView}.
 */
public class NoOpResultSubpartitionView implements ResultSubpartitionView {

	@Nullable
	public ResultSubpartition.BufferAndBacklog getNextBuffer() {
		return null;
	}

	@Override
	public void notifyDataAvailable() {
	}

	@Override
	public void releaseAllResources() {
	}

	@Override
	public boolean isReleased() {
		return true;
	}

	@Override
	public Throwable getFailureCause() {
		return null;
	}

	@Override
	public boolean nextBufferIsEvent() {
		return false;
	}

	@Override
	public boolean isAvailable() {
		return false;
	}

	@Override
	public int unsynchronizedGetNumberOfQueuedBuffers() {
		return 0;
	}
}