spark ShuffleServiceHeartbeat 源码
spark ShuffleServiceHeartbeat 代码
文件路径：/common/network-shuffle/src/main/java/org/apache/spark/network/shuffle/protocol/mesos/ShuffleServiceHeartbeat.java
/*
* 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.spark.network.shuffle.protocol.mesos;
import io.netty.buffer.ByteBuf;
import org.apache.spark.network.protocol.Encoders;
import org.apache.spark.network.shuffle.protocol.BlockTransferMessage;
// Needed by ScalaDoc. See SPARK-7726
import static org.apache.spark.network.shuffle.protocol.BlockTransferMessage.Type;
/**
* A heartbeat sent from the driver to the MesosExternalShuffleService.
*/
public class ShuffleServiceHeartbeat extends BlockTransferMessage {
private final String appId;
public ShuffleServiceHeartbeat(String appId) {
this.appId = appId;
}
public String getAppId() { return appId; }
@Override
protected Type type() { return Type.HEARTBEAT; }
@Override
public int encodedLength() { return Encoders.Strings.encodedLength(appId); }
@Override
public void encode(ByteBuf buf) {
Encoders.Strings.encode(buf, appId);
}
public static ShuffleServiceHeartbeat decode(ByteBuf buf) {
return new ShuffleServiceHeartbeat(Encoders.Strings.decode(buf));
}
}
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