com.liferay.portal.service.ServiceContextAdvice Maven / Gradle / Ivy

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/**
 * 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.service;

import com.liferay.portal.kernel.aop.AopMethodInvocation;
import com.liferay.portal.kernel.aop.ChainableMethodAdvice;
import com.liferay.portal.kernel.service.ServiceContext;
import com.liferay.portal.kernel.service.ServiceContextThreadLocal;

import java.lang.annotation.Annotation;
import java.lang.reflect.Method;

import java.util.Map;

/**
 * @author Preston Crary
 */
public class ServiceContextAdvice extends ChainableMethodAdvice {

	@Override
	public Object createMethodContext(
		Class targetClass, Method method,
		Map, Annotation> annotations) {

		int index = _getServiceContextParameterIndex(method);

		if (index == -1) {
			return null;
		}

		return index;
	}

	@Override
	public Object invoke(
			AopMethodInvocation aopMethodInvocation, Object[] arguments)
		throws Throwable {

		int index = aopMethodInvocation.getAdviceMethodContext();

		ServiceContext serviceContext = (ServiceContext)arguments[index];

		if (serviceContext != null) {
			ServiceContextThreadLocal.pushServiceContext(serviceContext);
		}

		try {
			return aopMethodInvocation.proceed(arguments);
		}
		finally {
			if (serviceContext != null) {
				ServiceContextThreadLocal.popServiceContext();
			}
		}
	}

	private int _getServiceContextParameterIndex(Method method) {
		Class[] parameterTypes = method.getParameterTypes();

		for (int i = parameterTypes.length - 1; i >= 0; i--) {
			if (ServiceContext.class.isAssignableFrom(parameterTypes[i])) {
				return i;
			}
		}

		return -1;
	}

}