hadoop ClientToAMTokenSecretManager 源码
haddop ClientToAMTokenSecretManager 代码
文件路径：/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/security/client/ClientToAMTokenSecretManager.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.yarn.security.client;
import javax.crypto.SecretKey;
import org.apache.hadoop.classification.InterfaceAudience.Public;
import org.apache.hadoop.classification.InterfaceStability.Evolving;
import org.apache.hadoop.security.token.SecretManager;
import org.apache.hadoop.yarn.api.records.ApplicationAttemptId;
/**
* A simple {@link SecretManager} for AMs to validate Client-RM tokens issued to
* clients by the RM using the underlying master-key shared by RM to the AMs on
* their launch. All the methods are called by either Hadoop RPC or YARN, so
* this class is strictly for the purpose of inherit/extend and register with
* Hadoop RPC.
*/
@Public
@Evolving
public class ClientToAMTokenSecretManager extends
BaseClientToAMTokenSecretManager {
private static final int MASTER_KEY_WAIT_MSEC = 10 * 1000;
// Only one master-key for AM
private volatile SecretKey masterKey;
public ClientToAMTokenSecretManager(
ApplicationAttemptId applicationAttemptID, byte[] key) {
super();
if (key != null) {
this.masterKey = SecretManager.createSecretKey(key);
} else {
this.masterKey = null;
}
}
@Override
public byte[] retrievePassword(ClientToAMTokenIdentifier identifier)
throws InvalidToken {
if (this.masterKey == null) {
synchronized (this) {
while (masterKey == null) {
try {
wait(MASTER_KEY_WAIT_MSEC);
break;
} catch (InterruptedException e) {
}
}
}
}
return super.retrievePassword(identifier);
}
@Override
public SecretKey getMasterKey(ApplicationAttemptId applicationAttemptID) {
// Only one master-key for AM, just return that.
return this.masterKey;
}
public void setMasterKey(byte[] key) {
synchronized (this) {
this.masterKey = SecretManager.createSecretKey(key);
notifyAll();
}
}
}
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