AppConfig.java

package com.example.config;

import javax.annotation.PostConstruct;
import javax.inject.Inject;
import javax.websocket.DeploymentException;
import javax.websocket.server.ServerContainer;
import javax.websocket.server.ServerEndpoint;
import javax.websocket.server.ServerEndpointConfig;

import org.eclipse.jetty.websocket.jsr356.server.AnnotatedServerEndpointConfig;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.context.WebApplicationContext;

import com.example.services.BroadcastServerEndpoint;

@Configuration
public class AppConfig  {
	@Inject private WebApplicationContext context;
	private ServerContainer container;
	
	public class SpringServerEndpointConfigurator extends ServerEndpointConfig.Configurator {
		@Override
		public < T > T getEndpointInstance( Class< T > endpointClass ) throws InstantiationException {
			return context.getAutowireCapableBeanFactory().createBean( endpointClass );			
		}
	}
	
	@Bean
	public ServerEndpointConfig.Configurator configurator() {
		return new SpringServerEndpointConfigurator();
	}
	
	@PostConstruct
	public void init() throws DeploymentException {
		container = ( ServerContainer )context.getServletContext().getAttribute( javax.websocket.server.ServerContainer.class.getName() );
		
		container.addEndpoint( 
			new AnnotatedServerEndpointConfig( BroadcastServerEndpoint.class, BroadcastServerEndpoint.class.getAnnotation( ServerEndpoint.class )  ) {
				@Override
				public Configurator getConfigurator() {
					return configurator();
				}
			}
		);
	}		
}