Class MemcachedLock

The current implementation does not support authentication.

Configuration parameters

• connection(s):
  • discovery_key: (optional) a key to retrieve the connection from IDiscovery
  • host: host name or IP address
  • port: port number
  • uri: resource URI or connection string with all parameters in it
• options:
  • retry_timeout: timeout in milliseconds to retry lock acquisition. (Default: 100)
  • max_size: maximum number of values stored in this cache (default: 1000)
  • max_key_size: maximum key length (default: 250)
  • max_expiration: maximum expiration duration in milliseconds (default: 2592000)
  • max_value: maximum value length (default: 1048576)
  • pool_size: pool size (default: 5)
  • reconnect: reconnection timeout in milliseconds (default: 10 sec)
  • retries: number of retries (default: 3)
  • timeout: default caching timeout in milliseconds (default: 1 minute)
  • failures: number of failures before stop retrying (default: 5)
  • retry: retry timeout in milliseconds (default: 30 sec)
  • idle: idle timeout before disconnect in milliseconds (default: 5 sec)

References

• *:discovery:*:*:1.0 (optional) IDiscovery services to resolve connection

Example

let lock = new MemcachedLock();
lock.configure(ConfigParams.fromTuples(
  "host", "localhost",
  "port", 11211
));

lock.open("123", (err) => {
  ...
});

lock.acquire("123", "key1", (err) => {
     if (err == null) {
         try {
           // Processing...
         } finally {
            lock.releaseLock("123", "key1", (err) => {
               // Continue...
            });
         }
     }
});