spark DBBackend 源码
spark DBBackend 代码
文件路径：/common/network-common/src/main/java/org/apache/spark/network/shuffledb/DBBackend.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.shuffledb;
import java.util.Locale;
/**
* The enum `DBBackend` use to specify a disk-based store used in shuffle service local db.
* Support the use of LevelDB and RocksDB.
*/
public enum DBBackend {
LEVELDB(".ldb"), ROCKSDB(".rdb");
private final String fileSuffix;
DBBackend(String fileSuffix) {
this.fileSuffix = fileSuffix;
}
public String fileName(String prefix) {
return prefix + fileSuffix;
}
public static DBBackend byName(String value) {
return DBBackend.valueOf(value.toUpperCase(Locale.ROOT));
}
}
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