hadoop MetricsSink 源码
haddop MetricsSink 代码
文件路径：/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/metrics2/MetricsSink.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 java.io.Closeable;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;
/**
* The metrics sink interface. <p>
* Implementations of this interface consume the {@link MetricsRecord} generated
* from {@link MetricsSource}. It registers with {@link MetricsSystem} which
* periodically pushes the {@link MetricsRecord} to the sink using
* {@link #putMetrics(MetricsRecord)} method. If the implementing class also
* implements {@link Closeable}, then the MetricsSystem will close the sink when
* it is stopped.
*/
@InterfaceAudience.Public
@InterfaceStability.Evolving
public interface MetricsSink extends MetricsPlugin {
/**
* Put a metrics record in the sink
* @param record the record to put
*/
void putMetrics(MetricsRecord record);
/**
* Flush any buffered metrics
*/
void flush();
}
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