hadoop MsInfo 源码
haddop MsInfo 代码
文件路径：/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/metrics2/impl/MsInfo.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.metrics2.impl;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.metrics2.MetricsInfo;
import java.util.StringJoiner;
/**
* Metrics system related metrics info instances
*/
@InterfaceAudience.Private
public enum MsInfo implements MetricsInfo {
NumActiveSources("Number of active metrics sources"),
NumAllSources("Number of all registered metrics sources"),
NumActiveSinks("Number of active metrics sinks"),
NumAllSinks("Number of all registered metrics sinks"),
Context("Metrics context"),
Hostname("Local hostname"),
SessionId("Session ID"),
ProcessName("Process name");
private final String desc;
MsInfo(String desc) {
this.desc = desc;
}
@Override public String description() {
return desc;
}
@Override public String toString() {
return new StringJoiner(", ", this.getClass().getSimpleName() + "{", "}")
.add("name=" + name())
.add("description=" + desc)
.toString();
}
}
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