Jedis.setnx metodu - Distributed Lock

Örnek

Açıklaması şöyle

For high-performance and low-contention scenarios, Redis distributed locks shine. Redis offers a powerful SETNX (SET if Not eXists) command to implement robust distributed locks.

Use Case: Recommended for high-throughput systems with a large number of concurrent processes accessing shared resources. For instance, in a real-time multiplayer game, players’ in-game inventory may be accessed simultaneously by multiple game servers. By employing Redis distributed locks, each server can efficiently acquire a lock on a player’s inventory and perform exclusive operations to ensure data consistency and avoid conflicts.

Şöyle yaparız

import redis.clients.jedis.Jedis;

String host = "localhost";
int port = 6379;

try (Jedis jedis = new Jedis(host, port)) {
  String lockKey = "resource_key";
  String lockValue = "locked";
  int timeout = 300; // Lock expiration time in seconds

  // Acquire the lock
  long acquired = jedis.setnx(lockKey, lockValue);
  if (acquired == 1) {
    // Lock acquired successfully, perform exclusive operations
    // ...

    // Release the lock
    jedis.del(lockKey);
    } else {
      // Failed to acquire the lock, wait and retry or handle accordingly
    }
  }
}