hadoop StepType 源码
haddop StepType 代码
文件路径：/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/startupprogress/StepType.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.startupprogress;
import org.apache.hadoop.classification.InterfaceAudience;
/**
* Indicates a particular type of {@link Step}.
*/
@InterfaceAudience.Private
public enum StepType {
/**
* The namenode has entered safemode and is awaiting block reports from
* datanodes.
*/
AWAITING_REPORTED_BLOCKS("AwaitingReportedBlocks", "awaiting reported blocks"),
/**
* The namenode is performing an operation related to delegation keys.
*/
DELEGATION_KEYS("DelegationKeys", "delegation keys"),
/**
* The namenode is performing an operation related to delegation tokens.
*/
DELEGATION_TOKENS("DelegationTokens", "delegation tokens"),
/**
* The namenode is performing an operation related to inodes.
*/
INODES("Inodes", "inodes"),
/**
* The namenode is performing an operation related to cache pools.
*/
CACHE_POOLS("CachePools", "cache pools"),
/**
* The namenode is performing an operation related to cache entries.
*/
CACHE_ENTRIES("CacheEntries", "cache entries"),
/**
* The namenode is performing an operation related to erasure coding policies.
*/
ERASURE_CODING_POLICIES("ErasureCodingPolicies", "erasure coding policies");
private final String name, description;
/**
* Private constructor of enum.
*
* @param name String step type name
* @param description String step type description
*/
private StepType(String name, String description) {
this.name = name;
this.description = description;
}
/**
* Returns step type description.
*
* @return String step type description
*/
public String getDescription() {
return description;
}
/**
* Returns step type name.
*
* @return String step type name
*/
public String getName() {
return name;
}
}
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