org.ualerts.fixed.integration.ApplicationContextUtil.java Source code

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/*
 * File created on May 8, 2013
 *
 * Copyright 2008-2013 Virginia Polytechnic Institute and State University
 *
 * 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.ualerts.fixed.integration;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

/**
 * A utility for loading an {@code ApplicationContext}
 *
 * @author Brian Early
 */
public final class ApplicationContextUtil {

    private static ClassPathXmlApplicationContext context;

    private ApplicationContextUtil() {
    }

    /**
     * Gets the application context.
     * @return the application context.
     */
    public static synchronized ApplicationContext getContext() {
        try {
            if (context == null) {
                // TODO - Decide whether these XML files should be called
                // "fixed-*" or something else.
                context = new ClassPathXmlApplicationContext("spring/fixed-data.xml", "spring/fixed-service.xml");
            }
            return context;
        } catch (RuntimeException ex) {
            ex.getCause().printStackTrace();
            throw ex;
        }
    }

    /**
     * Closes the application context.
     */
    public static synchronized void close() {
        if (context == null)
            return;
        context.close();
        context = null;
    }

}