hadoop MetricsFilter 源码
haddop MetricsFilter 代码
文件路径：/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/metrics2/MetricsFilter.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 filter interface. The MetricsFilter objects can be used either to
* filter the metrics from {@link MetricsSource}s or to filter metrics per
* {@link MetricsSink}.
*/
@InterfaceAudience.Public
@InterfaceStability.Evolving
public abstract class MetricsFilter implements MetricsPlugin {
/**
* Whether to accept the name
* @param name to filter on
* @return true to accept; false otherwise.
*/
public abstract boolean accepts(String name);
/**
* Whether to accept the tag
* @param tag to filter on
* @return true to accept; false otherwise
*/
public abstract boolean accepts(MetricsTag tag);
/**
* Whether to accept the tags
* @param tags to filter on
* @return true to accept; false otherwise
*/
public abstract boolean accepts(Iterable<MetricsTag> tags);
/**
* Whether to accept the record
* @param record to filter on
* @return true to accept; false otherwise.
*/
public boolean accepts(MetricsRecord record) {
return accepts(record.name()) && accepts(record.tags());
}
}
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