RedisSession

Redis-based session implementation supporting multiple Redis clients.

This implementation provides a unified interface for Redis-based session storage, supporting multiple Redis client implementations:

• Jedis - Standalone, Cluster, Sentinel

• Lettuce - Standalone, Cluster, Sentinel

• Redisson - Standalone, Cluster, Sentinel, Master/Slave

The session state is stored in Redis with following key structure:

• Single state: {prefix}{sessionId}:{stateKey} - Redis String containing JSON

• List state: {prefix}{sessionId}:{stateKey}:list - Redis List containing JSON items

• List hash: {prefix}{sessionId}:{stateKey}:list:_hash - Hash for change detection

• Session marker: {prefix}{sessionId}:_keys - Redis Set tracking all state keys

Jedis Usage Examples:

Jedis Standalone (using RedisClient):

`// Create Jedis RedisClient (new API)
RedisClient redisClient = RedisClient.create("redis://localhost:6379");

// Build RedisSession
Session session = RedisSession.builder()
.jedisClient(redisClient)
.build();
`

Jedis Cluster (using RedisClusterClient):

`// Create Jedis RedisClusterClient
Set<HostAndPort> nodes = new HashSet<>();
nodes.add(new HostAndPort("localhost", 7000));
nodes.add(new HostAndPort("localhost", 7001));
nodes.add(new HostAndPort("localhost", 7002));
RedisClusterClient redisClusterClient = RedisClusterClient.create(nodes);

// Build RedisSession
Session session = RedisSession.builder()
.jedisClient(redisClusterClient)
.build();
`

Jedis Sentinel (using RedisSentinelClient):

`// Create Jedis RedisSentinelClient
Set<String> sentinelNodes = new HashSet<>();
sentinelNodes.add("localhost:26379");
sentinelNodes.add("localhost:26380");
RedisSentinelClient redisSentinelClient = RedisSentinelClient.create("mymaster", sentinelNodes);

// Build RedisSession
Session session = RedisSession.builder()
.jedisClient(redisSentinelClient)
.build();
`

Lettuce Usage Examples:

Lettuce Standalone:

`// Create Lettuce RedisClient
RedisClient redisClient = RedisClient.create("redis://localhost:6379");

// Build RedisSession
Session session = RedisSession.builder()
.lettuceClient(redisClient)
.build();
`

Lettuce Cluster:

`// Create Lettuce RedisClusterClient for cluster mode
RedisClusterClient clusterClient = RedisClusterClient.create(
RedisURI.create("localhost", 7000));

// Build RedisSession
Session session = RedisSession.builder()
.lettuceClusterClient(clusterClient)
.build();
`

Lettuce Sentinel:

`// Create Lettuce RedisClient for sentinel
RedisURI sentinelUri = RedisURI.builder()
.withSentinelMasterId("mymaster")
.withSentinel("localhost", 26379)
.withSentinel("localhost", 26380)
.build();
RedisClient redisClient = RedisClient.create(sentinelUri);

// Build RedisSession
Session session = RedisSession.builder()
.lettuceClient(redisClient)
.build();
`

Redisson Usage Example:

`// Create RedissonClient (configure as needed for your deployment mode)
Config config = new Config();
config.useSingleServer().setAddress("redis://localhost:6379");
// or for cluster: config.useClusterServers().addNodeAddress("redis://localhost:7000");
// or for sentinel: config.useSentinelServers().setMasterName("mymaster").addSentinelAddress("redis://localhost:26379");

RedissonClient redissonClient = Redisson.create(config);

// Build RedisSession
Session session = RedisSession.builder()
.redissonClient(redissonClient)
.build();
`

Custom Key Prefix Example:

`// Create Redis client
RedisClient redisClient = RedisClient.create("redis://localhost:6379");

// Build RedisSession with custom key prefix
Session session = RedisSession.builder()
.jedisClient(redisClient)
.keyPrefix("myapp:session:")
.build();
`