2 * Copyright © 2016-2017 European Support Limited
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 package org.openecomp.sdc.logging.spi;
19 import java.util.concurrent.Callable;
22 * Should be used to implement a framework-specific mechanism of managing a per-thread diagnostic context
23 * (for instance <a href="http://www.slf4j.org/manual.html#mdc">MDC</a>), and propagating it to child threads if needed.
24 * Context propagation should be used when creating a child thread directly, or submitting tasks for potentially
25 * postponed execution via an
26 * <a href="http://docs.oracle.com/javase/8/docs/api/java/util/concurrent/Executor.html">Executor</a> (including any of
28 * <a href="http://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ExecutorService.html">executor services</a>
29 * and <a href="http://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ForkJoinPool.html">ForkJoinPool</a>).
35 public interface LoggingContextService {
38 * Allows to store a key-value pair on thread context
40 void put(String key, String value);
43 * Returns the value associated with a key stored on thread context
45 * @return value or <code>null</code> if the key does not exits
47 String get(String key);
50 * Removes a particular key from thread context
52 void remove(String key);
55 * Clear logging thread context
60 * Copies logging context of current thread onto a {@link Runnable}, so that the context is available
61 * when this {@link Runnable} runs in another thread.
63 Runnable copyToRunnable(Runnable runnable);
66 * Copies logging context of current thread onto a {@link Callable}, so that the context is available
67 * when this {@link Callable} runs in another thread
69 <V> Callable<V> copyToCallable(Callable<V> callable);