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/*
* Copyright © 2016-2017 European Support Limited
*
* 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 org.openecomp.sdc.logging.provider;
import java.util.concurrent.Callable;
/**
* Should be used to implement a framework-specific mechanism of managing a per-thread diagnostic context
* (for instance <a href="http://www.slf4j.org/manual.html#mdc">MDC</a>), and propagating it to child threads if needed.
* Context propagation should be used when creating a child thread directly, or submitting tasks for potentially
* postponed execution via an
* <a href="http://docs.oracle.com/javase/8/docs/api/java/util/concurrent/Executor.html">Executor</a> (including any of
* the
* <a href="http://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ExecutorService.html">executor services</a>
* and <a href="http://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ForkJoinPool.html">ForkJoinPool</a>).
*
* @author evitaliy
* @since 07/01/2018.
*/
public interface LoggingContextService {
/**
* Allows to store a key-value pair on thread context
*/
void put(String key, String value);
/**
* Returns the value associated with a key stored on thread context
*
* @return value or <code>null</code> if the key does not exits
*/
String get(String key);
/**
* Removes a particular key from thread context
*/
void remove(String key);
/**
* Clear logging thread context
*/
void clear();
/**
* Copies logging context of current thread onto a {@link Runnable}, so that the context is available
* when this {@link Runnable} runs in another thread.
*/
Runnable toRunnable(Runnable runnable);
/**
* Copies logging context of current thread onto a {@link Callable}, so that the context is available
* when this {@link Callable} runs in another thread
*/
<V> Callable<V> toCallable(Callable<V> callable);
}
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