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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.slf4j;
import java.util.Map;
import java.util.concurrent.Callable;
/**
* Carries MDC values over to a Callable from the instantiating thread to the moment the callable will run.
*
* @author evitaliy
* @since 08 Jan 18
*/
class MDCCallableWrapper<V> implements Callable<V> {
private final Context context = new Context();
private final Callable<V> task;
MDCCallableWrapper(Callable<V> task) {
this.task = task;
}
@Override
public V call() throws Exception {
Map<ContextField, String> oldContext = context.replace();
try {
return task.call();
} finally {
context.revert(oldContext);
}
}
}
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