/**
 * ============LICENSE_START=======================================================
 * org.onap.aai
 * ================================================================================
 * Copyright © 2017-2018 AT&T Intellectual Property. All rights reserved.
 * ================================================================================
 * 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.
 * ============LICENSE_END=========================================================
 */
package org.onap.aai.concurrent;
import java.util.concurrent.Callable;
import java.util.Map;
import org.slf4j.MDC;

/**
 * The Class AaiCallable ensures that the Callable gets a copy of the MDC, so that any logging related fields are preserved
 */
public abstract class AaiCallable<T> implements Callable<T> {
	private Map<String,String> mdcCopy;
	/**
	 * The constructor.
	 */
	@SuppressWarnings("unchecked")
	public AaiCallable() {
        mdcCopy = MDC.getCopyOfContextMap();
    }
	/**
	 * The call method
	 */
    public T call() throws Exception {
    	MDC.setContextMap(mdcCopy);
        return process();
    }
    /**
	 * The process method
	 */
    public abstract T process() throws Exception;
}