CentOS/6 - Upstart - Java

README.md

make deps
make
make install
make run
make test

hello.conf

# Upstart 0.6.5 - set of features is limited

description "Hello Java Service"
author "Evan"

#setuid helloapp
#setgid helloapp

respawn

#console log
exec java -classpath /etc/hello Service

Makefile

JFLAGS = -g
JC = javac

.SUFFIXES: .java .class

.java.class:
        $(JC) $(JFLAGS) $*.java

CLASSES = Service.java

default: classes

classes: $(CLASSES:.java=.class)

clean:
        $(RM) *.class

.PHONY: deps
deps:
        yum -y install java-1.8.0-openjdk-devel

.PHONY: install
install:
        cp hello.conf /etc/init/; mkdir -p /etc/hello; cp *.class /etc/hello/

.PHONY: run
run:
        initctl start hello

.PHONY: test
test:
        curl http://localhost:8000/test

Service.java

import java.util.Date;

import java.io.IOException;
import java.io.OutputStream;
import java.net.InetSocketAddress;

import com.sun.net.httpserver.HttpExchange;
import com.sun.net.httpserver.HttpHandler;
import com.sun.net.httpserver.HttpServer;

public class Service {

    public static void main(String[] args) throws Exception {
        System.out.println("Started");
        HttpServer server = HttpServer.create(new InetSocketAddress(8000), 0);
        server.createContext("/test", new Handler());
        server.setExecutor(null); // creates a default executor
        server.start();
    }

    public static class Handler implements HttpHandler {
        @Override
        public void handle(HttpExchange t) throws IOException {
            String response = "this is the response " + new Date() + "\n";
            t.sendResponseHeaders(200, response.length());
            OutputStream os = t.getResponseBody();
            os.write(response.getBytes());
            os.close();
        }
    }
}