Singleton EJB - Initiates the connection to a web socket server

StockServiceBootstrapBean.java

package blog.abhirockzz.wordpress.com;

import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.annotation.PostConstruct;
import javax.annotation.PreDestroy;
import javax.ejb.Singleton;
import javax.ejb.Startup;
import javax.inject.Inject;
import javax.websocket.ContainerProvider;
import javax.websocket.DeploymentException;
import javax.websocket.MessageHandler;
import javax.websocket.Session;
import javax.websocket.WebSocketContainer;

@Singleton
@Startup
public class StockServiceBootstrapBean {

    private final String WS_SERVER_URL = "ws://api.stocks/ticker"; //fictitious
    private Session session = null;

    @Inject
    StockInfoPersistenceService tickRepo;

    @PostConstruct
    public void bootstrap() {
        WebSocketContainer webSocketContainer = null;
        try {
            webSocketContainer = ContainerProvider.getWebSocketContainer();
            session = webSocketContainer.connectToServer(StockTickerClient.class, new URI(WS_SERVER_URL));

            System.out.println("Connected to WS endpoint " + WS_SERVER_URL);
            session.addMessageHandler(new MessageHandler.Whole<String>() {

                @Override
                public void onMessage(String msg) {
                    tickRepo.save(msg.split(":")[0], msg.split(":")[1]);
                }
            });
        } catch (DeploymentException | IOException | URISyntaxException ex) {
            Logger.getLogger(StockServiceBootstrapBean.class.getName()).log(Level.SEVERE, null, ex);
        }
    }

    @PreDestroy
    public void destroy() {
        close();
    }

    private void close() {
        try {
            session.close();
            System.out.println("CLOSED Connection to WS endpoint " + WS_SERVER_URL);
        } catch (IOException ex) {
            Logger.getLogger(StockServiceBootstrapBean.class.getName()).log(Level.SEVERE, null, ex);
        }
    }
}