NetBeans headless platform application: read from stdin

If anyone else gets hung up on this, I decided to go with a socket option on an OptionProcessor service provider implementation.  This allows us to define a runtime argument with a socket parameter and telnet in.  


Code:

@ServiceProvider(service = OptionProcessor.class)
public class MyOptionProcessor extends OptionProcessor {
    private Option defaultOption = Option.always();
    private Option scriptOption = Option.defaultArguments();
    private Option socketOption = Option.optionalArgument('s', "socket");

    @Override
    protected Set<Option> getOptions() {
        HashSet set = new HashSet();
        set.add(defaultOption);
        set.add(scriptOption);
        set.add(socketOption);
        return set;
    }

    @Override
    protected void process(Env env, Map<Option, String[]> optionValues) throws CommandException {
        String[] fileArgs = new String[0];
        if (optionValues.containsKey(scriptOption)) {
            fileArgs = optionValues.get(scriptOption);
        }

        int portNumber = 0;
        if (optionValues.containsKey(socketOption)) {
            String strSocket = optionValues.get(socketOption)[0];
            try {
                portNumber = Integer.parseInt(strSocket);
            } catch (NumberFormatException nfe) {
                System.out.println("Bad socket parameter: '" + strSocket + "'. Socket needs to be a decimal number between 1 and 65535.");
            }
        }

        Main main = new Main();
        
        // Read/write using socket instead of stdin/stdout
        if (portNumber > 0) { 
            System.out.println("Listening on port " + Integer.toString(portNumber));
            try (
                ServerSocket server = new ServerSocket(portNumber);
                Socket socket = server.accept();
                ) {

                System.setIn(socket.getInputStream());
                System.setOut(new PrintStream(socket.getOutputStream(), true));
                main.start(fileArgs);
            } catch (IOException ex) {
                Exceptions.printStackTrace(ex);
            }

        } else { // read from stdin
            main.start(fileArgs);
        }
    }
}


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