hadoop MetricsCollector 源码
haddop MetricsCollector 代码
文件路径：/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/metrics2/MetricsCollector.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;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;
/**
* The metrics collector interface
*/
@InterfaceAudience.Public
@InterfaceStability.Evolving
public interface MetricsCollector {
/**
* Add a metrics record
* @param name of the record
* @return a {@link MetricsRecordBuilder} for the record {@code name}
*/
public MetricsRecordBuilder addRecord(String name);
/**
* Add a metrics record
* @param info of the record
* @return a {@link MetricsRecordBuilder} for metrics {@code info}
*/
public MetricsRecordBuilder addRecord(MetricsInfo info);
}
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