hadoop DisabledNameservice 源码
haddop DisabledNameservice 代码
文件路径：/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/records/DisabledNameservice.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.server.federation.store.records;
import java.io.IOException;
import java.util.SortedMap;
import java.util.TreeMap;
import org.apache.hadoop.hdfs.server.federation.store.driver.StateStoreSerializer;
/**
* Data record indicating a specific name service ID has been disabled and
* is no longer valid. Allows quick disabling of name services.
*/
public abstract class DisabledNameservice extends BaseRecord {
public DisabledNameservice() {
super();
}
public static DisabledNameservice newInstance() throws IOException {
DisabledNameservice record =
StateStoreSerializer.newRecord(DisabledNameservice.class);
record.init();
return record;
}
public static DisabledNameservice newInstance(String nsId)
throws IOException {
DisabledNameservice record = newInstance();
record.setNameserviceId(nsId);
return record;
}
/**
* Get the identifier of the name service to disable.
*
* @return Identifier of the name service to disable.
*/
public abstract String getNameserviceId();
/**
* Set the identifier of the name service to disable.
*
* @param nameServiceId Identifier of the name service to disable.
*/
public abstract void setNameserviceId(String nameServiceId);
@Override
public SortedMap<String, String> getPrimaryKeys() {
SortedMap<String, String> keyMap = new TreeMap<>();
keyMap.put("nameServiceId", this.getNameserviceId());
return keyMap;
}
@Override
public boolean hasOtherFields() {
// We don't have fields other than the primary keys
return false;
}
@Override
public long getExpirationMs() {
return -1;
}
}
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