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/**
* Copyright 2012 Netflix, Inc.
*
* Licensed 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 com.netflix.hystrix.strategy.metrics;
import com.netflix.hystrix.HystrixThreadPool;
/**
* Metrics publisher for a {@link HystrixThreadPool} that will be constructed by an implementation of {@link HystrixMetricsPublisher}.
*
* Instantiation of implementations of this interface should NOT allocate resources that require shutdown, register listeners or other such global state changes.
*
* The initialize() method will be called once-and-only-once to indicate when this instance can register with external services, start publishing metrics etc.
*
* Doing this logic in the constructor could result in memory leaks, double-publishing and other such behavior because this can be optimistically constructed more than once and "extras" discarded with
* only one actually having initialize() called on it.
*/
public interface HystrixMetricsPublisherThreadPool {
// TODO should the arguments be given via initialize rather than constructor so people can't accidentally do it wrong?
public void initialize();
}