org.reallysqs.server.views.QueueListView.java Source code

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Here is the source code for org.reallysqs.server.views.QueueListView.java

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/*
 * Copyright 2008-2009 the original author or authors.
 *
 * 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.reallysqs.server.views;

import java.util.Collection;
import java.util.Map;

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

import org.springframework.web.servlet.view.AbstractView;

import org.reallysqs.server.domain.Queue;

/**
 * Responsible for rendering the response to a request
 * to list all the current queues.
 * 
 * In this case a SQS standard XML document is rendered and returned.
 * 
 * See http://docs.amazonwebservices.com/AWSSimpleQueueService/2006-04-01/REST_RestOperations.html
 * 
 * @author Russ Miles (russ@russmiles.com)
 *
 */
public class QueueListView extends AbstractView {

    private static final String prelude = "<ListQueuesResponse "
            + "xmlns=\"http://queue.amazonaws.com/doc/2006-04-01/\" "
            + "xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" " + "xsi:type=\"ListQueuesResponse\" >"
            + "<Queues>";

    private static final String epilogue = "</Queues>" + "<ResponseStatus>" + "<StatusCode>Success</StatusCode>"
            + "<RequestId>cb919c0a-9bce-4afe-9b48-9bdf2412bb67</RequestId>" + "</ResponseStatus>"
            + "</ListQueuesResponse>";

    /* (non-Javadoc)
     * @see org.springframework.web.servlet.view.AbstractView#renderMergedOutputModel(java.util.Map, javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
     */
    @SuppressWarnings("unchecked")
    @Override
    protected void renderMergedOutputModel(Map<String, Object> model, HttpServletRequest request,
            HttpServletResponse response) throws Exception {

        response.setContentType("text/xml");

        Map<String, Queue> queues = (Map<String, Queue>) model.get("queues");

        Collection<Queue> queueList = queues.values();

        ServletOutputStream outputStream = response.getOutputStream();
        outputStream.print(prelude);

        for (Queue queue : queueList) {
            outputStream.print("<QueueUrl>");
            outputStream.print("http://" + request.getLocalName() + ":" + request.getLocalPort()
                    + request.getContextPath() + request.getServletPath() + "/queues/" + queue.getName());
            outputStream.print("</QueueUrl>");
        }

        outputStream.print(epilogue);

    }

}