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/*
* Copyright (c) 1999, Oracle and/or its affiliates. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of Oracle nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*
* This source code is provided to illustrate the usage of a given feature
* or technique and has been deliberately simplified. Additional steps
* required for a production-quality application, such as security checks,
* input validation and proper error handling, might not be present in
* this sample code.
*/
import java.io.*;
import java.net.*;
import java.lang.Byte;
/**
* Simple Java "server" using a single thread to handle each connection.
*/
public class SimpleServer
{
private final static int BYTESPEROP= PollingServer.BYTESPEROP;
private final static int PORTNUM = PollingServer.PORTNUM;
private final static int MAXCONN = PollingServer.MAXCONN;
/*
* This synchronization object protects access to certain
* data (bytesRead,eventsToProcess) by concurrent Consumer threads.
*/
private final static Object eventSync = new Object();
private static InputStream[] instr = new InputStream[MAXCONN];
private static int bytesRead;
private static int bytesToRead;
public SimpleServer() {
Socket[] sockArr = new Socket[MAXCONN];
long timestart, timestop;
int bytes;
int totalConn=0;
System.out.println ("Serv: Initializing port " + PORTNUM);
try {
ServerSocket skMain = new ServerSocket (PORTNUM);
bytesRead = 0;
Socket ctrlSock = skMain.accept();
BufferedReader ctrlReader =
new BufferedReader(new InputStreamReader(ctrlSock.getInputStream()));
String ctrlString = ctrlReader.readLine();
bytesToRead = Integer.valueOf(ctrlString).intValue();
ctrlString = ctrlReader.readLine();
totalConn = Integer.valueOf(ctrlString).intValue();
System.out.println("Receiving " + bytesToRead + " bytes from " +
totalConn + " client connections");
timestart = System.currentTimeMillis();
/*
* Take connections, spawn off connection handling threads
*/
ConnHandler[] connHA = new ConnHandler[MAXCONN];
int conn = 0;
while ( conn < totalConn ) {
Socket sock = skMain.accept();
connHA[conn] = new ConnHandler(sock.getInputStream());
connHA[conn].start();
conn++;
}
while ( bytesRead < bytesToRead ) {
java.lang.Thread.sleep(500);
}
timestop = System.currentTimeMillis();
System.out.println("Time for all reads (" + totalConn +
" sockets) : " + (timestop-timestart));
// Tell the client it can now go away
byte[] buff = new byte[BYTESPEROP];
ctrlSock.getOutputStream().write(buff,0,BYTESPEROP);
} catch (Exception exc) { exc.printStackTrace(); }
}
/*
* main ... just create invoke the SimpleServer constructor.
*/
public static void main (String args[])
{
SimpleServer server = new SimpleServer();
}
/*
* Connection Handler inner class...one of these per client connection.
*/
class ConnHandler extends Thread {
private InputStream instr;
public ConnHandler(InputStream inputStr) { instr = inputStr; }
public void run() {
try {
int bytes;
byte[] buff = new byte[BYTESPEROP];
while ( bytesRead < bytesToRead ) {
bytes = instr.read (buff, 0, BYTESPEROP);
if (bytes > 0 ) {
synchronized(eventSync) {
bytesRead += bytes;
}
/*
* Any real server would do some synchronized and some
* unsynchronized work on behalf of the client, and
* most likely send some data back...but this is a
* gross oversimplification.
*/
}
else {
if (bytesRead < bytesToRead)
System.out.println("instr.read returned : " + bytes);
}
}
}
catch (Exception e) {e.printStackTrace();}
}
}
}
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