Java example source code file (checkError.java)

This example Java source code file (checkError.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

bufferedreader, exception, httpserver, httpurlconnection, interruptedexception, ioexception, net, network, object, outofmemoryerror, post, serversocket, string, stringtokenizer, test_failed, test_passed, util

The checkError.java Java example source code

/*
 * Copyright (c) 2004, 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.
 */

/**
 * @test
 * @bug 5054016
 * @run main/othervm/timeout=300 checkError
 * @summary get the failure immediately when writing individual chunks over socket fail
 */

import java.io.*;
import java.net.*;
import java.util.StringTokenizer;


public class checkError {
    static final int TEST_PASSED = 95;
    static final int TEST_FAILED = 97;

    static int testStatus = TEST_PASSED;

    static String serverName = "localhost";
    static int bufferSize = 8192; // 8k
    static int totalBytes = 1048576; // 1M

    static int j = 0;

    static public Object threadStarting = new Object();
    static public Object threadWaiting = new Object();


    public static void main(String[] args) throws Exception {
        HttpURLConnection conn = null;
        OutputStream toServer = null;
        byte[] buffer = null;
        HTTPServer server = null;
        synchronized(threadWaiting) {
            System.out.println("HTTP-client>Starting default Http-server");
            synchronized(threadStarting) {
                server = new HTTPServer();
                server.start();
                try {
                    System.out.println("waiting server to be start");
                    threadStarting.wait();
                } catch (InterruptedException e) {
                }
            }
            int port = server.getPort();
            URL url = new URL("http://" + serverName + ":" + port);
            conn = (HttpURLConnection )url.openConnection();
            conn.setRequestMethod("POST");
            conn.setDoOutput(true);

            System.out.println("assigning 1024 to the chunk length");
            conn.setChunkedStreamingMode(1024);
            conn.connect();

            toServer = conn.getOutputStream();
            buffer = getThickBuffer(bufferSize);
            System.out.println("sending " + totalBytes + " bytes");
        }

        int byteAtOnce = 0;
        int sendingBytes = totalBytes;
        try {
            while (sendingBytes > 0) {
                if (sendingBytes > bufferSize) {
                    byteAtOnce = bufferSize;
                } else {
                    byteAtOnce = sendingBytes;
                }
                toServer.write(buffer, 0, byteAtOnce);
                sendingBytes -= byteAtOnce;
                // System.out.println((totalBytes - sendingBytes) + " was sent");
                toServer.flush();
            }
        } catch (OutOfMemoryError e) {
            e.printStackTrace();
            System.out.println("***ERR***> UNEXPECTED error: " + e);
            testStatus = TEST_FAILED;
            testExit();
        } catch (IOException e) {
            // e.printStackTrace();
            // this is the expected IOException
            // due to server.close()
            testStatus = TEST_PASSED;
            testExit();
        } finally {
            toServer.close();
        }

        // we have not received the expected IOException
        // test fail
        testStatus = TEST_FAILED;
        testExit();

    }

    static void testExit() {
        if (testStatus == TEST_FAILED) {
            throw new RuntimeException("Test Failed: haven't received the expected IOException");
        } else {
            System.out.println("TEST PASSED");
        }
        System.exit(testStatus);
    }

    static byte[] getThickBuffer(int size) {

        byte[] buffer = new byte[size];

        for (int i = 0; i < size; i++) {
            if (j > 9)
                j = 0;
            String s = Integer.toString(j);
            buffer[i] = (byte )s.charAt(0);
            j++;
        }

        return buffer;
    }
}


class HTTPServer extends Thread {

    static volatile boolean isCompleted;

    Socket client;
    ServerSocket serverSocket;

    int getPort() {
        return serverSocket.getLocalPort();
    }

    public void run() {

        synchronized(checkError.threadStarting) {

            try {
                serverSocket = new ServerSocket(0, 100);
            } catch (Exception e) {
                e.printStackTrace();
                checkError.testStatus = checkError.TEST_FAILED;
                return;
            }
            checkError.threadStarting.notify();
        }

        try {
            client = serverSocket.accept();
        } catch (Exception e) {
            e.printStackTrace();
            checkError.testStatus = checkError.TEST_FAILED;
            return;
        }

        System.out.println("Server started");

        BufferedReader in = null;
        PrintStream out = null;
        InputStreamReader reader = null;
        String version = null;
        String line;
        String method;

        synchronized(checkError.threadWaiting) {
            try {
                reader = new InputStreamReader(client.getInputStream());
                in = new BufferedReader(reader);
                line = in.readLine();

            } catch (Exception e) {
                e.printStackTrace();
                checkError.testStatus = checkError.TEST_FAILED;
                return;
            }
            StringTokenizer st = new StringTokenizer(line);
            method = st.nextToken();
            String fileName = st.nextToken();

            // save version for replies
            if (st.hasMoreTokens()) version = st.nextToken();

            System.out.println("HTTP version: " + version);

        }

        try {

            while (line != null && line.length() > 0) {
                line = in.readLine();
                System.out.println(line);
            }
        } catch (IOException e) {
            e.printStackTrace();
            checkError.testStatus = checkError.TEST_FAILED;
            return;
        }

        if (method.equals("POST")) {
            System.out.println("receiving data");
            byte[] buf = new byte[1024];
            try {
                //reading bytes until chunk whose size is zero,
                // see 19.4.6 Introduction of Transfer-Encoding in RFC2616
                int count = 0;
                while (count <=5) {
                    count++;
                    in.readLine();
                }

                System.out.println("Server socket is closed");
                in.close();
                client.close();
                serverSocket.close();

            } catch (IOException e) {
                e.printStackTrace();
                checkError.testStatus = checkError.TEST_FAILED;
                return;
            } catch (OutOfMemoryError e) {
                e.printStackTrace();
                checkError.testStatus = checkError.TEST_FAILED;
                return;
            }

        }
    }

}