kafka MetricValueProvider 源码
kafka MetricValueProvider 代码
文件路径：/clients/src/main/java/org/apache/kafka/common/metrics/MetricValueProvider.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.kafka.common.metrics;
/**
* Super-interface for {@link Measurable} or {@link Gauge} that provides
* metric values.
* <p>
* In the future for Java8 and above, {@link Gauge#value(MetricConfig, long)} will be
* moved to this interface with a default implementation in {@link Measurable} that returns
* {@link Measurable#measure(MetricConfig, long)}.
* </p>
*/
public interface MetricValueProvider<T> { }
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