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Nginx + Java = Nginj

FastCGI implemention in Java with at runtime .java file compilation.

What, Why and How?

Nginx is one the most used web servers and as a Java developer you are not able to use it. If you want to provide a web service in Java you have to use 3rd party libraries like Jetty, Tomcat, Vert.x or Akka. This project's goal is to use Nginx and Java as easy as Nginx and PHP (PHP-FPM). Nginj uses FastCGI to communicate with nginx on the same or dedicated server. Nginj compiles Java file on first sight and on any file changes in the configured root directory.

Dependencies

  • openjdk-8-jdk

Install

sudo dpkg -i nginj.deb

Configuration

NGINX

location ~ \.java$ {
	include /etc/nginx/fastcgi_params;
	fastcgi_pass   127.0.0.1:9000;
}

NGINJ

/etc/nginj/config.properties

#
# rootDirectory: directory to look for .java files
#
rootDirectory=/var/www

#
# tmpDir: temporary directory for .class files
#
tmpDirectory=/tmp/nginj

#
# host: address to listen
#
host=127.0.0.1

#
# port: port to listen
#
port=9000

#
# treads: number of threads accepting and handing requests
#
threads=10

Example

// /var/www/Example.java => http://localhost/exmpale.java
import io.github.puddingspudding.nginj.HttpResponse;
import io.github.puddingspudding.nginj.Request;
import io.github.puddingspudding.nginj.Response;
import io.github.puddingspudding.nginj.http.GET;

import java.nio.ByteBuffer;
import java.util.HashMap;

public class Example {

    @GET
    public static Response get(final Request req) {
        Response res = new HttpResponse();
        res.setBody(ByteBuffer.wrap("GET Hello World".getBytes()));
        res.setHeader(new HashMap<>());
        res.setStatus(200);
        return res;
    }

}

Build .deb

mvn clean package \
&& mv target/nginj-jar-with-dependencies.jar src/main/deb/usr/lib/nginj/nginj.jar \
&& cd src/main/deb \
&& tar -czf data.tar.gz  usr/ var/ etc/ \
&& tar -czf control.tar.gz prerm postinst postrm control conffiles \
&& ar r nginj.deb debian-binary control.tar.gz data.tar.gz \
&& rm data.tar.gz control.tar.gz \
&& cd -