/*

 * Copyright (c) 2006, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

import java.net.*;

import java.util.*;

import java.io.*;

import com.sun.net.httpserver.*;

import java.util.concurrent.Executors;

import java.util.concurrent.ExecutorService;

public class RetryPost

{

    static boolean shouldRetry = true;

    com.sun.net.httpserver.HttpServer httpServer;

    MyHandler httpHandler;

    ExecutorService executorService;

    public static void main(String[] args) {

        if (args.length == 1 && args[0].equals("noRetry"))

            shouldRetry = false;

        new RetryPost();

    }

    public RetryPost() {

        try {

            startHttpServer(shouldRetry);

            doClient();

        } catch (IOException ioe) {

            System.err.println(ioe);

        }

    }

    void doClient() {

        try {

            InetSocketAddress address = httpServer.getAddress();

            uc.setDoOutput(true);

            uc.setRequestMethod("POST");

            uc.getResponseCode();

            // if we reach here then we have failed

            throw new RuntimeException("Failed: POST request being retried");

        } catch (SocketException se) {

            // this is what we expect to happen and is OK.

            if (shouldRetry && httpHandler.getCallCount() != 2)

                throw new RuntimeException("Failed: Handler should have been called twice. " +

                                           "It was called "+ httpHandler.getCallCount() + " times");

            else if (!shouldRetry && httpHandler.getCallCount() != 1)

                throw new RuntimeException("Failed: Handler should have only been called once" +

                                           "It was called "+ httpHandler.getCallCount() + " times");

        } catch (IOException e) {

            e.printStackTrace();

        } finally {

            httpServer.stop(1);

            executorService.shutdown();

        }

    }

    /**

     * Http Server

     */

    public void startHttpServer(boolean shouldRetry) throws IOException {

        httpServer = com.sun.net.httpserver.HttpServer.create(new InetSocketAddress(0), 0);

        httpHandler = new MyHandler(shouldRetry);

        HttpContext ctx = httpServer.createContext("/test/", httpHandler);

        executorService = Executors.newCachedThreadPool();

        httpServer.setExecutor(executorService);

        httpServer.start();

    }

    class MyHandler implements HttpHandler {

        int callCount = 0;

        boolean shouldRetry;

        public MyHandler(boolean shouldRetry) {

            this.shouldRetry = shouldRetry;

        }

        public void handle(HttpExchange t) throws IOException {

            callCount++;

            if (callCount > 1 && !shouldRetry) {

                // if this bug has been fixed then this method will not be called twice

                // when -Dhttp.retryPost=false

                t.sendResponseHeaders(400, -1);  // indicate failure by returning 400

            } else {

                // simply close out the stream without sending any data.

                OutputStream os = t.getResponseBody();

                os.close();

            }

        }

        public int getCallCount() {

            return callCount;

        }

    }

}