spark StreamChunkId 源码
spark StreamChunkId 代码
文件路径：/common/network-common/src/main/java/org/apache/spark/network/protocol/StreamChunkId.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;
/**
* Encapsulates a request for a particular chunk of a stream.
*/
public final class StreamChunkId implements Encodable {
public final long streamId;
public final int chunkIndex;
public StreamChunkId(long streamId, int chunkIndex) {
this.streamId = streamId;
this.chunkIndex = chunkIndex;
}
@Override
public int encodedLength() {
return 8 + 4;
}
@Override
public void encode(ByteBuf buffer) {
buffer.writeLong(streamId);
buffer.writeInt(chunkIndex);
}
public static StreamChunkId decode(ByteBuf buffer) {
assert buffer.readableBytes() >= 8 + 4;
long streamId = buffer.readLong();
int chunkIndex = buffer.readInt();
return new StreamChunkId(streamId, chunkIndex);
}
@Override
public int hashCode() {
return Objects.hash(streamId, chunkIndex);
}
@Override
public boolean equals(Object other) {
if (other instanceof StreamChunkId) {
StreamChunkId o = (StreamChunkId) other;
return streamId == o.streamId && chunkIndex == o.chunkIndex;
}
return false;
}
@Override
public String toString() {
return new ToStringBuilder(this, ToStringStyle.SHORT_PREFIX_STYLE)
.append("streamId", streamId)
.append("chunkIndex", chunkIndex)
.toString();
}
}
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