Queues implementation using Bull JS & Redis

redis-keys-for-bull-js-queues.md

Queues implementation using Bull JS & Redis

Introduction

Here are some of the identified suffixes for the keys you will find in Redis and the values they hold:

• :id - this key references the progression of the job ID. It is used to generate the next job ID
• :stalled-check - the time (probably of insertion) of the last stalled job
• :completed - the ids of completed jobs
• :failed - the ids of failed jobs

Some examples of the (full) keys you will find in Redis:

• "SyfqZ5J89Kxw4eOX:transfer:stalled-check"
• "tgURfiHK6N:notification:id"
• "tgURfiHK6N:notification:2"
• "tgURfiHK6N:funding:id"
• "tgURfiHK6N:transfer:stalled-check"
• "tgURfiHK6N:notification:failed"
• "SyfqZ5J89Kxw4eOX:webhook:stalled-check"
• "SyfqZ5J89Kxw4eOX:funding:stalled-check"
• "tgURfiHK6N:webhook:stalled-check"

From the above, you can tell that the keys are in this format: <QUEUE_PREFIX>:<QUEUE_NAME>:<SUFFIX>

Using Redis

Redis CLI

To know the type of a key, use the TYPE command:

redis-cli

TYPE tgURfiHK6N:notification:failed

If the key exists, it will return the type of the key, otherwise it will return none.

Here are some of the types you will find:

• string - the value is a string
• zset - the value is a sorted set of strings
• hash - the value is a hash map of strings to strings

1. To get the contents of a string key, use the GET command:

GET tgURfiHK6N:notification:failed

2. To get the contents of a zset key, use the ZRANGE command:

ZRANGE tgURfiHK6N:notification:failed 0 -1

3. To get the contents of a hash key, use the HGETALL command:

HGETALL tgURfiHK6N:notification:failed