PG Mutex Lock
Description
This is mutex lock implementation using postgres advisory lock feature.
Feature
- Support multi-process mutex lock
- Support single-process mutex lock
- Support retry, timeout configuration
- Full typescript support
API
class PGMutexLock
This class is entry point of features. All functions are located under this class instance.
Options
| Name | Type | Required | Default | Description |
|---|---|---|---|---|
| database.host | string | no | undefined | postgres database hostname |
| database.port | number | no | undefined | postgres database port |
| database.database | string | no | undefined | postgres database database name |
| database.user | string | no | undefined | postgres database user |
| database.password | string | no | undefined | postgres database password |
| timeout | number | no | 10 * 1000 | acquire lock timeout |
| retryCount | number | no | 3 | acquire lock retry count |
Method acquireLock (key: string) : Promise
Try to acquire lock for given key. If success, will be resolved with true. If failed, will be rejected.
Method releaseLock (key: string) : Promise
Try to release lock for given key. It directly return results of pg_advisory_unlock.