spark BlockFetchingListener 源码
spark BlockFetchingListener 代码
文件路径：/common/network-shuffle/src/main/java/org/apache/spark/network/shuffle/BlockFetchingListener.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;
import org.apache.spark.network.buffer.ManagedBuffer;
public interface BlockFetchingListener extends BlockTransferListener {
/**
* Called once per successfully fetched block. After this call returns, data will be released
* automatically. If the data will be passed to another thread, the receiver should retain()
* and release() the buffer on their own, or copy the data to a new buffer.
*/
void onBlockFetchSuccess(String blockId, ManagedBuffer data);
/**
* Called at least once per block upon failures.
*/
void onBlockFetchFailure(String blockId, Throwable exception);
@Override
default void onBlockTransferSuccess(String blockId, ManagedBuffer data) {
onBlockFetchSuccess(blockId, data);
}
@Override
default void onBlockTransferFailure(String blockId, Throwable exception) {
onBlockFetchFailure(blockId, exception);
}
@Override
default String getTransferType() {
return "fetch";
}
}
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