Add command control via named pipe

[kaka/cakelight.git] / src / kaka / cakelight / PipeController.java

package kaka.cakelight;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;

public class PipeController extends Thread {
    private static final String PIPE = "cakectrl";
    private Console console;

    public static void start(Console console) {
	new PipeController(console).start();
    }

    private PipeController(Console console) {
        this.console = console;
    }

    @Override
    public void run() {
        while (true) {
            createPipe();
            try (BufferedReader reader = new BufferedReader(new FileReader(new File(PIPE)))) {
                String input;
                while ((input = reader.readLine()) != null) {
                    console.handleInput(input);
                }
            } catch (IOException e) {
                System.out.println("Error reading from pipe '" + PIPE + "'");
            }
        }
    }

    private void createPipe() {
        try {
            Runtime.getRuntime().exec("mkfifo " + PIPE);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}