Question: Does Redis Lettuce Client Connect to ElastiCache?

Answer

Yes, the Redis Lettuce client can connect to an Amazon ElastiCache cluster. The Lettuce client is a Java-based library and it supports advanced features like SSL/TLS encryption, which is required for connecting to certain ElastiCache configurations.

To connect to an ElastiCache instance using the Lettuce client, follow these steps:

1. First, add the Lettuce dependency to your pom.xml file (if using Maven):

<dependency>
  <groupId>io.lettuce.core</groupId>
  <artifactId>lettuce-core</artifactId>
  <version>6.1.5.RELEASE</version> <!-- Check for the latest version -->
</dependency>

2. Next, in your Java code, create a Redis client with the necessary configuration options:

import io.lettuce.core.RedisClient;
import io.lettuce.core.RedisURI;
import io.lettuce.core.api.StatefulRedisConnection;
import io.lettuce.core.api.sync.RedisCommands;

public class LettuceElastiCache {

    public static void main(String[] args) {
        // Replace with your ElastiCache endpoint and port
        String host = "<your-elasticache-endpoint>";
        int port = 6379; // or your custom port

        RedisURI uri = RedisURI.Builder.redis(host, port)
                .withSsl(true)             // Enable SSL if needed
                .withVerifyPeer(false)     // Disable peer verification if required
                .build();

        RedisClient client = RedisClient.create(uri);
        StatefulRedisConnection<String, String> connection = client.connect();
        RedisCommands<String, String> commands = connection.sync();

        // Test the connection
        commands.set("hello", "world");
        String value = commands.get("hello");
        System.out.println("Value: " + value);

        connection.close();
        client.shutdown();
    }
}

Replace <your-elasticache-endpoint> with your ElastiCache instance's endpoint and update the port if necessary.

Remember to enable SSL/TLS encryption and disable peer verification only if it's required by your ElastiCache configuration.