org.atmosphere.util.ServletContextFactory Maven / Gradle / Ivy

Go to download
/*
 * Copyright 2017 Async-IO.org
 *
 * 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.atmosphere.util;

import javax.servlet.ServletContext;

/**
 * A simple Factory to get access to the {@linl ServletContext}. This factory won't work if more than one Servlet is deployed inside the same war.
 *
 * @author Jeanfrancois Arcand
 */
public class ServletContextFactory {

    private ServletContext servletContext;
    private static ServletContextFactory servletContextFactory;

    private ServletContextFactory() {
    }

    /**
     * Set the ServletContext
     *
     * @param servletContext ServletContext
     */
    public void init(ServletContext servletContext) {
        this.servletContext = servletContext;
    }

    public ServletContext getServletContext() {
        if (servletContext != null) {
            return servletContext;
        }
        return null;
    }

    public final static ServletContextFactory getDefault() {
        if (servletContextFactory == null) servletContextFactory = new ServletContextFactory();
        return servletContextFactory;
    }
}