hadoop TokenRenewer 源码
haddop TokenRenewer 代码
文件路径：/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/security/token/TokenRenewer.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.security.token;
import java.io.IOException;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.io.Text;
/**
* This is the interface for plugins that handle tokens.
*/
@InterfaceAudience.Public
@InterfaceStability.Evolving
public abstract class TokenRenewer {
/**
* Does this renewer handle this kind of token?
* @param kind the kind of the token
* @return true if this renewer can renew it
*/
public abstract boolean handleKind(Text kind);
/**
* Is the given token managed? Only managed tokens may be renewed or
* cancelled.
* @param token the token being checked
* @return true if the token may be renewed or cancelled
* @throws IOException raised on errors performing I/O.
*/
public abstract boolean isManaged(Token<?> token) throws IOException;
/**
* Renew the given token.
*
* @param token the token being checked.
* @param conf configuration.
*
* @return the new expiration time.
* @throws IOException raised on errors performing I/O.
* @throws InterruptedException thrown when a thread is waiting, sleeping,
* or otherwise occupied, and the thread is interrupted,
* either before or during the activity.
*/
public abstract long renew(Token<?> token,
Configuration conf
) throws IOException, InterruptedException;
/**
* Cancel the given token.
*
* @param token the token being checked.
* @param conf configuration.
*
* @throws IOException raised on errors performing I/O.
* @throws InterruptedException thrown when a thread is waiting, sleeping,
* or otherwise occupied, and the thread is interrupted,
* either before or during the activity.
*/
public abstract void cancel(Token<?> token,
Configuration conf
) throws IOException, InterruptedException;
}
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