org.apache.flink.runtime.io.network.api.reader.BufferReader Maven / Gradle / Ivy

/*
 * 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.api.reader;

import org.apache.flink.runtime.io.network.buffer.Buffer;
import org.apache.flink.runtime.io.network.partition.consumer.BufferOrEvent;
import org.apache.flink.runtime.io.network.partition.consumer.InputGate;

import java.io.IOException;

/**
 * A buffer-oriented reader.
 */
public final class BufferReader extends AbstractReader {

	public BufferReader(InputGate gate) {
		super(gate);
	}

	public Buffer getNextBuffer() throws IOException, InterruptedException {
		while (true) {
			final BufferOrEvent bufferOrEvent = inputGate.getNextBufferOrEvent();

			if (bufferOrEvent.isBuffer()) {
				return bufferOrEvent.getBuffer();
			}
			else {
				if (handleEvent(bufferOrEvent.getEvent())) {
					return null;
				}
			}
		}
	}
}