Example for loading/storing a string-based HttpSession from/to Redis using CDI

RedisExample.java

package biz.paluch.redis.example;

import java.util.Enumeration;
import java.util.Map;

import javax.annotation.PostConstruct;
import javax.annotation.PreDestroy;
import javax.inject.Inject;
import javax.servlet.http.HttpSession;

import com.lambdaworks.redis.RedisClient;
import com.lambdaworks.redis.RedisConnection;

/**
 * @author <a href="mailto:mpaluch@paluch.biz">Mark Paluch</a>
 */
public class RedisExample {

    @Inject
    private RedisClient redisClient;

    private RedisConnection<String, String> connection;

    public void storeSessionInRedis(HttpSession session) {
        Enumeration<String> names = session.getAttributeNames();
        while (names.hasMoreElements()) {
            String attributeName = names.nextElement();
            connection.hset(session.getId(), attributeName, session.getAttribute(attributeName).toString());
        }
    }

    public void loadSessionFromRedis(HttpSession session) {
        Map<String, String> sessionAttributes = connection.hgetall(session.getId());
        for (Map.Entry<String, String> entry : sessionAttributes.entrySet()) {
            session.setAttribute(entry.getKey(), entry.getValue());
        }
    }

    @PostConstruct
    public void postConstruct() {
        connection = redisClient.connect();
    }

    @PreDestroy
    public void preDestroy() {
        connection.close();
    }
}

RedisURIProducer.java

package biz.paluch.redis.example;

import javax.enterprise.inject.Produces;

import com.lambdaworks.redis.RedisURI;

/**
 * @author <a href="mailto:mpaluch@paluch.biz">Mark Paluch</a>
 */
public class RedisURIProducer {

    @Produces
    public RedisURI getRedisURI() {
        return RedisURI.create("redis://password@localhost:6379/0");
    }
}