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# Asynq <img src="https://user-images.githubusercontent.com/11155743/114697792-ffbfa580-9d26-11eb-8e5b-33bef69476dc.png" alt="Asynq logo" width="360px" />
# Simple, reliable & efficient distributed task queue in Go
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## Overview Asynq is a Go library for queueing tasks and processing them asynchronously with workers. It's backed by [Redis](https://redis.io/) and is designed to be scalable yet easy to get started.
Asynq is a Go library for queueing tasks and processing them asynchronously with workers. It's backed by Redis and is designed to be scalable yet easy to get started.
Highlevel overview of how Asynq works: Highlevel overview of how Asynq works:
@ -16,16 +16,11 @@ Highlevel overview of how Asynq works:
- Server pulls task off queues and starts a worker goroutine for each task - Server pulls task off queues and starts a worker goroutine for each task
- Tasks are processed concurrently by multiple workers - Tasks are processed concurrently by multiple workers
Task queues are used as a mechanism to distribute work across multiple machines. Task queues are used as a mechanism to distribute work across multiple machines. A system can consist of multiple worker servers and brokers, giving way to high availability and horizontal scaling.
A system can consist of multiple worker servers and brokers, giving way to high availability and horizontal scaling.
![Task Queue Diagram](/docs/assets/overview.png) **Example use case**
## Stability and Compatibility ![Task Queue Diagram](https://user-images.githubusercontent.com/11155743/114697318-727c5100-9d26-11eb-98d3-0e0cc38b613d.jpg)
**Important Note**: Current major version is zero (v0.x.x) to accomodate rapid development and fast iteration while getting early feedback from users (Feedback on APIs are appreciated!). The public API could change without a major version update before v1.0.0 release.
**Status**: The library is currently undergoing heavy development with frequent, breaking API changes.
## Features ## Features
@ -47,14 +42,24 @@ A system can consist of multiple worker servers and brokers, giving way to high
- [Web UI](#web-ui) to inspect and remote-control queues and tasks - [Web UI](#web-ui) to inspect and remote-control queues and tasks
- [CLI](#command-line-tool) to inspect and remote-control queues and tasks - [CLI](#command-line-tool) to inspect and remote-control queues and tasks
## Stability and Compatibility
**Status**: The library is currently undergoing **heavy development** with frequent, breaking API changes.
> ☝️ **Important Note**: Current major version is zero (`v0.x.x`) to accomodate rapid development and fast iteration while getting early feedback from users (_feedback on APIs are appreciated!_). The public API could change without a major version update before `v1.0.0` release.
## Quickstart ## Quickstart
First, make sure you are running a Redis server locally. Make sure you have Go installed ([download](https://golang.org/dl/)). Version `1.13` or higher is required.
Initialize your project by creating a folder and then running `go mod init github.com/your/repo` ([learn more](https://blog.golang.org/using-go-modules)) inside the folder. Then install Asynq library with the [`go get`](https://golang.org/cmd/go/#hdr-Add_dependencies_to_current_module_and_install_them) command:
```sh ```sh
$ redis-server go get -u github.com/hibiken/asynq
``` ```
Make sure you're running a Redis server locally or from a [Docker](https://hub.docker.com/_/redis) container. Version `3.0` or higher is required.
Next, write a package that encapsulates task creation and task handling. Next, write a package that encapsulates task creation and task handling.
```go ```go
@ -204,10 +209,9 @@ func main() {
} }
``` ```
Next, start a worker server to process these tasks in the background. Next, start a worker server to process these tasks in the background. To start the background workers, use [`Server`](https://pkg.go.dev/github.com/hibiken/asynq?tab=doc#Server) and provide your [`Handler`](https://pkg.go.dev/github.com/hibiken/asynq?tab=doc#Handler) to process the tasks.
To start the background workers, use [`Server`](https://pkg.go.dev/github.com/hibiken/asynq?tab=doc#Server) and provide your [`Handler`](https://pkg.go.dev/github.com/hibiken/asynq?tab=doc#Handler) to process the tasks.
You can optionally use [`ServeMux`](https://pkg.go.dev/github.com/hibiken/asynq?tab=doc#ServeMux) to create a handler, just as you would with [`"net/http"`](https://golang.org/pkg/net/http/) Handler. You can optionally use [`ServeMux`](https://pkg.go.dev/github.com/hibiken/asynq?tab=doc#ServeMux) to create a handler, just as you would with [`net/http`](https://golang.org/pkg/net/http/) Handler.
```go ```go
package main package main
@ -248,65 +252,52 @@ func main() {
} }
``` ```
For a more detailed walk-through of the library, see our [Getting Started Guide](https://github.com/hibiken/asynq/wiki/Getting-Started). For a more detailed walk-through of the library, see our [Getting Started](https://github.com/hibiken/asynq/wiki/Getting-Started) guide.
To Learn more about `asynq` features and APIs, see our [Wiki](https://github.com/hibiken/asynq/wiki) and [godoc](https://godoc.org/github.com/hibiken/asynq). To learn more about `asynq` features and APIs, see the package [godoc](https://godoc.org/github.com/hibiken/asynq).
## Web UI ## Web UI
[Asynqmon](https://github.com/hibiken/asynqmon) is a web based tool for monitoring and administrating Asynq queues and tasks. [Asynqmon](https://github.com/hibiken/asynqmon) is a web based tool for monitoring and administrating Asynq queues and tasks.
Please see the tool's [README](https://github.com/hibiken/asynqmon) for details.
Here's a few screenshots of the web UI. Here's a few screenshots of the Web UI:
**Queues view** **Queues view**
![Web UI QueuesView](/docs/assets/asynqmon-queues-view.png)
![Web UI Queues View](https://user-images.githubusercontent.com/11155743/114697016-07327f00-9d26-11eb-808c-0ac841dc888e.png)
**Tasks view** **Tasks view**
![Web UI TasksView](/docs/assets/asynqmon-task-view.png)
![Web UI TasksView](https://user-images.githubusercontent.com/11155743/114697070-1f0a0300-9d26-11eb-855c-d3ec263865b7.png)
**Settings and adaptive dark mode**
![Web UI Settings and adaptive dark mode](https://user-images.githubusercontent.com/11155743/114697149-3517c380-9d26-11eb-9f7a-ae2dd00aad5b.png)
For details on how to use the tool, refer to the tool's [README](https://github.com/hibiken/asynqmon#readme).
## Command Line Tool ## Command Line Tool
Asynq ships with a command line tool to inspect the state of queues and tasks. Asynq ships with a command line tool to inspect the state of queues and tasks.
Here's an example of running the `stats` command.
![Gif](/docs/assets/demo.gif)
For details on how to use the tool, refer to the tool's [README](/tools/asynq/README.md).
## Installation
To install `asynq` library, run the following command:
```sh
go get -u github.com/hibiken/asynq
```
To install the CLI tool, run the following command: To install the CLI tool, run the following command:
```sh ```sh
go get -u github.com/hibiken/asynq/tools/asynq go get -u github.com/hibiken/asynq/tools/asynq
``` ```
## Requirements Here's an example of running the `asynq stats` command:
| Dependency | Version | ![Gif](/docs/assets/demo.gif)
| -------------------------- | ------- |
| [Redis](https://redis.io/) | v3.0+ | For details on how to use the tool, refer to the tool's [README](/tools/asynq/README.md).
| [Go](https://golang.org/) | v1.13+ |
## Contributing ## Contributing
We are open to, and grateful for, any contributions (Github issues/pull-requests, feedback on Gitter channel, etc) made by the community. We are open to, and grateful for, any contributions (GitHub issues/PRs, feedback on [Gitter channel](https://gitter.im/go-asynq/community), etc) made by the community.
Please see the [Contribution Guide](/CONTRIBUTING.md) before contributing. Please see the [Contribution Guide](/CONTRIBUTING.md) before contributing.
## Acknowledgements
- [Sidekiq](https://github.com/mperham/sidekiq) : Many of the design ideas are taken from sidekiq and its Web UI
- [RQ](https://github.com/rq/rq) : Client APIs are inspired by rq library.
- [Cobra](https://github.com/spf13/cobra) : Asynq CLI is built with cobra
## License ## License
Asynq is released under the MIT license. See [LICENSE](https://github.com/hibiken/asynq/blob/master/LICENSE). Copyright (c) 2019-present [Ken Hibino](https://github.com/hibiken) and [Contributors](https://github.com/hibiken/asynq/graphs/contributors). `Asynq` is free and open-source software licensed under the [MIT License](https://github.com/hibiken/asynq/blob/master/LICENSE). Official logo was created by [Vic Shóstak](https://github.com/koddr) and distributed under [Creative Commons](https://creativecommons.org/publicdomain/zero/1.0/) license (CC0 1.0 Universal).