hadoop HistoryServerNullStateStoreService 源码
haddop HistoryServerNullStateStoreService 代码
文件路径：/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-hs/src/main/java/org/apache/hadoop/mapreduce/v2/hs/HistoryServerNullStateStoreService.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.mapreduce.v2.hs;
import java.io.IOException;
import org.apache.hadoop.classification.InterfaceAudience.Private;
import org.apache.hadoop.classification.InterfaceStability.Unstable;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.mapreduce.v2.api.MRDelegationTokenIdentifier;
import org.apache.hadoop.security.token.delegation.DelegationKey;
@Private
@Unstable
public class HistoryServerNullStateStoreService
extends HistoryServerStateStoreService {
@Override
protected void initStorage(Configuration conf) throws IOException {
// Do nothing
}
@Override
protected void startStorage() throws IOException {
// Do nothing
}
@Override
protected void closeStorage() throws IOException {
// Do nothing
}
@Override
public HistoryServerState loadState() throws IOException {
throw new UnsupportedOperationException(
"Cannot load state from null store");
}
@Override
public void storeToken(MRDelegationTokenIdentifier tokenId, Long renewDate)
throws IOException {
// Do nothing
}
@Override
public void updateToken(MRDelegationTokenIdentifier tokenId, Long renewDate)
throws IOException {
// Do nothing
}
@Override
public void removeToken(MRDelegationTokenIdentifier tokenId)
throws IOException {
// Do nothing
}
@Override
public void storeTokenMasterKey(DelegationKey key) throws IOException {
// Do nothing
}
@Override
public void removeTokenMasterKey(DelegationKey key) throws IOException {
// Do nothing
}
}
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