com.boylesoftware.web.impl.view.DispatchViewSender.java Source code

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Here is the source code for com.boylesoftware.web.impl.view.DispatchViewSender.java

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/*
 * Copyright 2013 Boyle Software, Inc.
 *
 * 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 com.boylesoftware.web.impl.view;

import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import com.boylesoftware.web.spi.ViewSender;

/**
 * View sender implementation that dispatches the request to another resource to
 * send the view. This sender implementation can be typically used for JSP-based
 * views. The sender interprets the view id as a context-relative URI, to which
 * it forwards the request.
 *
 * @author Lev Himmelfarb
 */
public class DispatchViewSender implements ViewSender {

    /**
     * The log.
     */
    private final Log log = LogFactory.getLog(this.getClass());

    /* (non-Javadoc)
     * @see com.boylesoftware.web.spi.ViewSender#send(java.lang.String, javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
     */
    @Override
    public void send(final String viewId, final HttpServletRequest request, final HttpServletResponse response)
            throws IOException, ServletException {

        if (request.isAsyncStarted()) {
            if (this.log.isDebugEnabled())
                this.log.debug("dispatching to " + viewId + " using async context");
            request.getAsyncContext().dispatch(viewId);
        } else {
            if (this.log.isDebugEnabled())
                this.log.debug("dispatching to " + viewId + " using request dispatcher");
            request.getRequestDispatcher(viewId).forward(request, response);
        }
    }
}