I have a customer who's stuck in an EJB 3.0 environment. No @Singleton, no bean-managed concurrency :-(
Considering thread management and synchronization is forbidden by the ejb specification, how to implement a cache? In essence, I want an non-synchronized object cache for some costly operations.
And I use Redis with Jedis for temporary values in memory.
See the link below
https://redislabs.com/lp/redis-java/
Redis comes with installers for multiple operating systems.
Example:
import redis.clients.jedis.Jedis;
public class RedisStringJava {
public static void main(String[] args) {
//Connecting to Redis server on localhost
Jedis jedis = new Jedis("localhost");
System.out.println("Connected");
//set the data in redis string and expire in default time
jedis.set("param_name", "Param value");
// Get the stored data and print it
System.out.println("Stored string in redis:: "+ jedis.get("param_name"));
}
}