ServiceContextThreadLocal.java

/**
 * Copyright (c) 2000-present Liferay, Inc. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation; either version 2.1 of the License, or (at your option)
 * any later version.
 *
 * This library is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
 * details.
 */

package com.liferay.portal.kernel.service;

import com.liferay.portal.kernel.util.AutoResetThreadLocal;

import java.util.LinkedList;

/**
 * @author Michael C. Han
 */
public class ServiceContextThreadLocal {

	public static ServiceContext getServiceContext() {
		LinkedList<ServiceContext> serviceContextStack =
			_serviceContextThreadLocal.get();

		return serviceContextStack.peek();
	}

	public static ServiceContext popServiceContext() {
		LinkedList<ServiceContext> serviceContextStack =
			_serviceContextThreadLocal.get();

		if (serviceContextStack.isEmpty()) {
			return null;
		}

		return serviceContextStack.pop();
	}

	public static void pushServiceContext(ServiceContext serviceContext) {
		LinkedList<ServiceContext> serviceContextStack =
			_serviceContextThreadLocal.get();

		serviceContextStack.push(serviceContext);
	}

	private static final ThreadLocal<LinkedList<ServiceContext>>
		_serviceContextThreadLocal =
			new AutoResetThreadLocal<LinkedList<ServiceContext>>(
				ServiceContextThreadLocal.class + "._serviceContextThreadLocal",
				LinkedList::new) {

				@Override
				protected LinkedList<ServiceContext> copy(
					LinkedList<ServiceContext> serviceContexts) {

					LinkedList<ServiceContext> cloneServiceContexts =
						new LinkedList<>();

					for (ServiceContext serviceContext : serviceContexts) {
						ServiceContext cloneServiceContext =
							(ServiceContext)serviceContext.clone();

						cloneServiceContexts.add(cloneServiceContext);
					}

					return cloneServiceContexts;
				}

			};

}