RequestHolder.java

/*
 * Copyright 2013 Martin Kouba
 *
 * 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.trimou.servlet;

import javax.servlet.http.HttpServletRequest;

/**
 * Simple {@link ThreadLocal} based request holder.
 *
 * This holder might not be working correctly in case of the request is not
 * processed in one thread only (e.g. async servlets processing).
 *
 * @author Martin Kouba
 */
public final class RequestHolder {

    private static final ThreadLocal<HttpServletRequest> CURRENT_REQUEST = new ThreadLocal<>();

    static void requestInitialized(HttpServletRequest request) {
        CURRENT_REQUEST.set(request);
    }

    public static HttpServletRequest getCurrentRequest() {
        return CURRENT_REQUEST.get();
    }

    static void requestDestroyed() {
        CURRENT_REQUEST.remove();
    }

}