org.apache.hadoop.hdfs.server.datanode.DataNodeMXBean Maven / Gradle / Ivy
/**
* 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.datanode;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;
/**
*
* This is the JMX management interface for data node information
*/
@InterfaceAudience.Public
@InterfaceStability.Stable
public interface DataNodeMXBean {
/**
* Gets the version of Hadoop.
*
* @return the version of Hadoop
*/
public String getVersion();
/**
* Gets the rpc port.
*
* @return the rpc port
*/
public String getRpcPort();
/**
* Gets the http port.
*
* @return the http port
*/
public String getHttpPort();
/**
* Gets the namenode IP addresses
*
* @return the namenode IP addresses that the datanode is talking to
*/
public String getNamenodeAddresses();
/**
* Gets the information of each volume on the Datanode. Please
* see the implementation for the format of returned information.
*
* @return the volume info
*/
public String getVolumeInfo();
/**
* Gets the cluster id.
*
* @return the cluster id
*/
public String getClusterId();
/**
* Returns an estimate of the number of Datanode threads
* actively transferring blocks.
*/
public int getXceiverCount();
}