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n8n-nodes-bullmq

v0.5.9

Published

N8n nodes for BullMQ

Downloads

119

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Links

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Maintainers

minhlucvanminhlucvan

Keywords

n8n-community-node-package

Readme

Banner image

n8n-nodes-bullmq

This package provides nodes to interact with BullMQ in n8n.

BullMQ

BullMQ is a Node.js queue library that is built on top of Redis. It is a rewrite of the original Bull Library, which is no longer maintained. BullMQ is a simple, fast, and reliable queue library suitable for a wide range of use cases.

While working with N8N I found that we need some way to to queue the jobs and work on them asynchronously. Since Redis and BullMQ are the most lightweight and reliable solutions for this, I decided to create a set of nodes to work with BullMQ.

Installation

There are two ways to install community nodes:

Features

Trying to cover all functionalities that BullMQ provides

  • [x] Queueing Jobs: Queue jobs to be processed asynchronously without blocking the main thread.

  • [x] Workflow Monitoring: Monitor the progress of jobs in the workflow using BullMQ and tools like bullmq-board.

  • [x] Rate Limiting: Rate-limit the number of jobs processed simultaneously to avoid overloading the system.

  • [x] Job Retries: Automatically retry jobs that fail, until they succeed.

  • [x] Flow Control: Control the flow of jobs in a workflow, ensuring specific job processing order, or pausing/resuming jobs.

  • [x] Job Prioritization: Set priority levels for jobs to ensure critical tasks are processed first.

  • [x] Concurrency Management: Control the number of concurrent jobs per worker to optimize resource utilization.

  • [x] Delayed Jobs: Schedule jobs to run after a certain delay, enabling future task execution like reminders.

  • [x] Job Throttling & Debouncing: Prevent overloads and reduce redundant processing by throttling or debouncing jobs.

  • [x] Event-Driven Execution: Trigger actions based on job events such as completion, failure, or progress updates.

  • [x] Scalable Processing: Scale jobs across multiple servers for high-throughput and fault-tolerant workflows.

  • [x] Job Lifecycle Hooks: Use before/after job processing hooks for logging, metrics, or job modification.

  • [x] Atomic and Reliable Processing: Ensure jobs are processed exactly once through Redis transactions for atomic, reliable workflows.

Nodes

BullMQ Trigger

image

Starts a workflow when a new job is added to the specified queue.

there are two modes for the trigger:

  • respond immediately: the trigger will respond immediately with the job data, and mark the job as completed.
  • wait for completion: the trigger will wait for the job to be completed before responding with the job data.

Notes: In order to wait for the job to be completed, we must use the BullMQ Respond node to mark the job as completed.

BullMQ

image

BullMQ node to add a job to the specified queue, wih the ability to pass data to the job and options.

BullMQ Respond

BullMQ node to mark a job as completed, failed, or delayed.

Notes: The respond node requires the jobId and a lockToken to mark the job as completed, failed, or delayed. you could get those values from the BullMQ Trigger node.

BullMQ Wait (WIP)

Similar to the Wait node but wait for Queue events instead of webhook

Roadmap

  • [ ] Flow managerment
  • [ ] Better error handle
  • [ ] Bugs fixes

Contribution

I would love to see more features and nodes added to this package. If you have any ideas or suggestions, feel free to open an issue or a pull request.

License

LICENSE