spark ShuffleChecksumSupport 源码
spark ShuffleChecksumSupport 代码
文件路径：/core/src/main/java/org/apache/spark/shuffle/checksum/ShuffleChecksumSupport.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.shuffle.checksum;
import java.util.zip.Checksum;
import org.apache.spark.SparkConf;
import org.apache.spark.internal.config.package$;
import org.apache.spark.network.shuffle.checksum.ShuffleChecksumHelper;
public interface ShuffleChecksumSupport {
default Checksum[] createPartitionChecksums(int numPartitions, SparkConf conf) {
if ((boolean) conf.get(package$.MODULE$.SHUFFLE_CHECKSUM_ENABLED())) {
String checksumAlgorithm = conf.get(package$.MODULE$.SHUFFLE_CHECKSUM_ALGORITHM());
return ShuffleChecksumHelper.createPartitionChecksums(numPartitions, checksumAlgorithm);
} else {
return ShuffleChecksumHelper.EMPTY_CHECKSUM;
}
}
default long[] getChecksumValues(Checksum[] partitionChecksums) {
int numPartitions = partitionChecksums.length;
long[] checksumValues = new long[numPartitions];
for (int i = 0; i < numPartitions; i++) {
checksumValues[i] = partitionChecksums[i].getValue();
}
return checksumValues;
}
}
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