Introduction
Netty and Jersey are a great combination for providing RESTful web services based on JAX-RS. Netty is designed for high-throughput, and Jersey is designed for ease of use. The example application below is an attempt to make demonstrate how to use these powerful technologies in short order.
Code
The following class can be re-used in your personal projects in in a simple manner.
package com.bluelotussoftware;
import io.netty.channel.Channel;
import java.net.URI;
import org.glassfish.jersey.netty.connector.NettyConnectorProvider;
import org.glassfish.jersey.netty.httpserver.NettyHttpContainerProvider;
import org.glassfish.jersey.server.ResourceConfig;
/**
* A basic implementation of {@link NettyConnectorProvider} providing HTTP and HTTP/2 servers for the {@link URI} and
* resource classes provided.
*
* @author John Yeary <jyeary@bluelotussoftware.com>
* @version 1.0.0
*/
public final class NettyServerProviders {
/**
* Initializes a {@link NettyHttpContainerProvider} using the provided {@link URI} and resource classes with HTTP
* 1.1.
*
* @param baseURI The base URI to connect to the server.
* @param classes The resource classes to provide serve using this provider.
* @return A initialized Netty {@link Channel}.
*/
public static Channel initializeNettyHttpServer(final String baseURI, final Class<?>... classes) {
final ResourceConfig rc = new ResourceConfig(classes);
return NettyHttpContainerProvider.createServer(URI.create(baseURI), rc, false);
}
/**
* Initializes a {@link NettyHttpContainerProvider} using the provided {@link URI} and resource classes with HTTP/2.
*
* @param baseURI The base URI to connect to the server.
* @param classes The resource classes to provide serve using this provider.
* @return A initialized Netty {@link Channel}.
*/
public static Channel initializeNettyHttp2Server(final String baseURI, final Class<?>... classes) {
final ResourceConfig rc = new ResourceConfig(classes);
return NettyHttpContainerProvider.createHttp2Server(URI.create(baseURI), rc, null);
}
}
The implementation is just as easy.
final Channel httpServer = NettyServerProviders.initializeNettyHttpServer(BASE_URI_HTTP, HelloResource.class);
As you can see, we are providing it with a single resource class called HelloResource.class. However, the NettyServerProviders.class accepts an array of resource classses, so you can simply just add them as necessary,e.g.,final Channel httpServer = NettyServerProviders.initializeNettyHttpServer(BASE_URI_HTTP, HelloResource.class, Resource2.class, Resource3.class, Resource4.class);
Project
The application can be downloaded from Github here: jersey-netty-service.