spark OneWayMessage 源码
spark OneWayMessage 代码
文件路径：/common/network-common/src/main/java/org/apache/spark/network/protocol/OneWayMessage.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.protocol;
import java.util.Objects;
import io.netty.buffer.ByteBuf;
import org.apache.commons.lang3.builder.ToStringBuilder;
import org.apache.commons.lang3.builder.ToStringStyle;
import org.apache.spark.network.buffer.ManagedBuffer;
import org.apache.spark.network.buffer.NettyManagedBuffer;
/**
* A RPC that does not expect a reply, which is handled by a remote
* {@link org.apache.spark.network.server.RpcHandler}.
*/
public final class OneWayMessage extends AbstractMessage implements RequestMessage {
public OneWayMessage(ManagedBuffer body) {
super(body, true);
}
@Override
public Message.Type type() { return Type.OneWayMessage; }
@Override
public int encodedLength() {
// The integer (a.k.a. the body size) is not really used, since that information is already
// encoded in the frame length. But this maintains backwards compatibility with versions of
// RpcRequest that use Encoders.ByteArrays.
return 4;
}
@Override
public void encode(ByteBuf buf) {
// See comment in encodedLength().
buf.writeInt((int) body().size());
}
public static OneWayMessage decode(ByteBuf buf) {
// See comment in encodedLength().
buf.readInt();
return new OneWayMessage(new NettyManagedBuffer(buf.retain()));
}
@Override
public int hashCode() {
return Objects.hashCode(body());
}
@Override
public boolean equals(Object other) {
if (other instanceof OneWayMessage) {
OneWayMessage o = (OneWayMessage) other;
return super.equals(o);
}
return false;
}
@Override
public String toString() {
return new ToStringBuilder(this, ToStringStyle.SHORT_PREFIX_STYLE)
.append("body", body())
.toString();
}
}
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