1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/samples/deadlock/src/org/apidesign/deadlock/startuplock/CLIHandlerBlocking.java	Sat Jun 14 09:54:31 2008 +0200
     1.3 @@ -0,0 +1,47 @@
     1.4 +package org.apidesign.deadlock.startuplock;
     1.5 +
     1.6 +import java.io.DataOutputStream;
     1.7 +import java.io.File;
     1.8 +import java.io.FileOutputStream;
     1.9 +import java.io.IOException;
    1.10 +import java.net.ServerSocket;
    1.11 +import java.util.logging.Level;
    1.12 +import java.util.logging.Logger;
    1.13 +
    1.14 +public final class CLIHandlerBlocking {
    1.15 +    // BEGIN: cli.real
    1.16 +    public static int start(File lockFile) throws IOException {
    1.17 +        enterState(10);
    1.18 +        if (lockFile.exists ()) {
    1.19 +            // read the port number and connect to it
    1.20 +            enterState(11);
    1.21 +            int alive = readPortNumber(lockFile);
    1.22 +            if (alive != -1) {
    1.23 +                // exit
    1.24 +                return alive;
    1.25 +            }
    1.26 +        }
    1.27 +        // otherwise try to create the file yourself
    1.28 +        enterState(20);
    1.29 +        lockFile.createNewFile();
    1.30 +        DataOutputStream os = new DataOutputStream(new FileOutputStream(lockFile));
    1.31 +        ServerSocket server = new ServerSocket();
    1.32 +        enterState(21);
    1.33 +        int p = server.getLocalPort();
    1.34 +        enterState(22);
    1.35 +        os.writeInt(p);
    1.36 +        enterState(23);
    1.37 +        
    1.38 +        return p;
    1.39 +    }
    1.40 +    // END: cli.real
    1.41 +
    1.42 +    private static Logger LOG = Logger.getLogger(CLIHandlerBlocking.class.getName());
    1.43 +    private static void enterState(int state) {
    1.44 +        LOG.log(Level.FINEST, "enterState {0}", state);
    1.45 +    }
    1.46 +
    1.47 +    private static int readPortNumber(File lockFile) throws IOException {
    1.48 +        return -1;
    1.49 +    }
    1.50 +}