hadoop ReplicationParam 源码
haddop ReplicationParam 代码
文件路径：/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/web/resources/ReplicationParam.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.hadoop.hdfs.web.resources;
import static org.apache.hadoop.hdfs.client.HdfsClientConfigKeys.DFS_REPLICATION_DEFAULT;
import static org.apache.hadoop.hdfs.client.HdfsClientConfigKeys.DFS_REPLICATION_KEY;
import org.apache.hadoop.conf.Configuration;
/** Replication parameter. */
public class ReplicationParam extends ShortParam {
/** Parameter name. */
public static final String NAME = "replication";
/** Default parameter value. */
public static final String DEFAULT = NULL;
private static final Domain DOMAIN = new Domain(NAME);
/**
* Constructor.
* @param value the parameter value.
*/
public ReplicationParam(final Short value) {
super(DOMAIN, value, (short)1, null);
}
/**
* Constructor.
* @param str a string representation of the parameter value.
*/
public ReplicationParam(final String str) {
this(DOMAIN.parse(str));
}
@Override
public String getName() {
return NAME;
}
/** @return the value or, if it is null, return the default from conf. */
public short getValue(final Configuration conf) {
return getValue() != null? getValue()
: (short)conf.getInt(DFS_REPLICATION_KEY, DFS_REPLICATION_DEFAULT);
}
}
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