hadoop SecondaryNameNodeInfoMXBean 源码
haddop SecondaryNameNodeInfoMXBean 代码
文件路径：/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/SecondaryNameNodeInfoMXBean.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.namenode;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;
/**
* JMX information of the secondary NameNode
*/
@InterfaceAudience.Private
@InterfaceStability.Evolving
public interface SecondaryNameNodeInfoMXBean extends VersionInfoMXBean {
/**
* Gets the host and port colon separated.
*/
public String getHostAndPort();
/**
* Gets if security is enabled.
*
* @return true, if security is enabled.
*/
boolean isSecurityEnabled();
/**
* @return the timestamp of when the SNN starts
*/
public long getStartTime();
/**
* @return the timestamp of the last checkpoint
*/
public long getLastCheckpointTime();
/**
* @return the number of msec since the last checkpoint, or -1 if no
* checkpoint has been done yet.
*/
public long getLastCheckpointDeltaMs();
/**
* @return the directories that store the checkpoint images
*/
public String[] getCheckpointDirectories();
/**
* @return the directories that store the edit logs
*/
public String[] getCheckpointEditlogDirectories();
}
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