Sockets for Servers - Java Network Programming - page 320

private static final int NUM_THREADS = 50 ;
private static final String INDEX_FILE = "index.html" ;
private final File rootDirectory ;
private final int port ;
public JHTTP ( File rootDirectory , int port ) throws IOException {
if (! rootDirectory . isDirectory ()) {
throw new IOException ( rootDirectory
+ " does not exist as a directory" );
}
this . rootDirectory = rootDirectory ;
this . port = port ;
}
public void start () throws IOException {
ExecutorService pool = Executors . newFixedThreadPool ( NUM_THREADS );
try ( ServerSocket server = new ServerSocket ( port )) {
logger . info ( "Accepting connections on port " + server . getLocalPort ());
logger . info ( "Document Root: " + rootDirectory );
while ( true ) {
try {
Socket request = server . accept ();
Runnable r = new RequestProcessor (
rootDirectory , INDEX_FILE , request );
pool . submit ( r );
} catch ( IOException ex ) {
logger . log ( Level . WARNING , "Error accepting connection" , ex );
}
}
}
}
public static void main ( String [] args ) {
// get the Document root
File docroot ;
try {
docroot = new File ( args [ 0 ]);
} catch ( ArrayIndexOutOfBoundsException ex ) {
System . out . println ( "Usage: java JHTTP docroot port" );
return ;
}
// set the port to listen on
int port ;
try {
port = Integer . parseInt ( args [ 1 ]);
if ( port < 0 || port > 65535 ) port = 80 ;
} catch ( RuntimeException ex ) {