hadoop DisabledNameserviceStoreImpl 源码
haddop DisabledNameserviceStoreImpl 代码
文件路径：/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/store/impl/DisabledNameserviceStoreImpl.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.impl;
import java.io.IOException;
import java.util.Set;
import java.util.TreeSet;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;
import org.apache.hadoop.hdfs.server.federation.store.DisabledNameserviceStore;
import org.apache.hadoop.hdfs.server.federation.store.driver.StateStoreDriver;
import org.apache.hadoop.hdfs.server.federation.store.records.DisabledNameservice;
/**
* Implementation of {@link DisabledNameserviceStore}.
*/
@InterfaceAudience.Private
@InterfaceStability.Evolving
public class DisabledNameserviceStoreImpl extends DisabledNameserviceStore {
public DisabledNameserviceStoreImpl(StateStoreDriver driver) {
super(driver);
}
@Override
public boolean disableNameservice(String nsId)
throws IOException {
DisabledNameservice record =
DisabledNameservice.newInstance(nsId);
return getDriver().put(record, false, false);
}
@Override
public boolean enableNameservice(String nsId)
throws IOException {
DisabledNameservice record =
DisabledNameservice.newInstance(nsId);
return getDriver().remove(record);
}
@Override
public Set<String> getDisabledNameservices() throws IOException {
Set<String> disabledNameservices = new TreeSet<>();
for (DisabledNameservice record : getCachedRecords()) {
String nsId = record.getNameserviceId();
disabledNameservices.add(nsId);
}
return disabledNameservices;
}
}
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