django-action-triggers 0.5.1

A Django library for asynchronously triggering actions in response to database changes. It supports integration with webhooks, message brokers (e.g., Kafka, RabbitMQ), and can trigger other processes, including AWS Lambda functions.

Django Action Triggers

Table of Contents

• Django Action Triggers
  • Table of Contents
  • Description
  • Why Use Django Action Triggers Over Django Signals?
    • How Django Action Triggers Helps
    • Built-in Integrations
    • Key Benefits:
  • Key Features
  • Documentation
  • Supported Message Brokers
  • Supported Actions
  • Installation
  • Usage
  • Example Scenarios
    • Example 1: Webhook Trigger on User Creation/Update/Deletion
    • Example 2: Webhooks and Message Queues on Product and Sale Creation/Update
  • Don't See What You're Looking For?
  • License

Description

In Django, signals are a powerful tool for responding to changes in your models or other parts of the application. Typically, you define signals in a signals.py file, specifying actions to take when certain events occur, like saving or deleting an object. While this approach works well in many cases, it can have some limitations:

This application is highly flexible and can be configured via code or through the Django admin interface.

Why Use Django Action Triggers Over Django Signals?

In Django, signals are typically hardcoded in a signals.py file, where you define logic like "if this happens, do that." While this works well for many cases, it introduces a few limitations:

• Changes require code updates: Adding or modifying signals requires changes to your codebase and redeployment.
• Static and inflexible: Anytime you need to modify, add, or remove signals, you have to manually edit the code and redeploy the application.
• Maintenance overhead: As your application grows, managing signals this way can make the code harder to maintain and scale.

How Django Action Triggers Helps

Django Action Triggers builds on Django’s signals by offering more flexibility at runtime. It allows you to create, modify, or remove signals and actions dynamically—without needing to change your code. This can all be done through the UI or API, making it easier to manage triggers and actions as your application evolves.

With Django Action Triggers, you can:

• Manage signals dynamically without redeployment, using the admin interface or API.
• Adjust workflows at runtime to respond to new requirements or integrations.
• Reduce the need for manual code changes when setting up new signals or actions.

Built-in Integrations

Django Action Triggers also includes out-of-the-box support for popular services such as AWS SNS, RabbitMQ, Kafka, and more. This allows you to easily send messages to these services, streamlining integrations without needing custom code.

Key Benefits:

• No code changes or redeploys needed: Manage signals and actions entirely through the UI or API.
• Flexibility at runtime: Easily add, modify, or remove actions and triggers on the fly.
• Built-in integrations: Connect seamlessly with external services like AWS SNS, Kafka, Redis, and more, saving time on implementation.

In summary, Django Action Triggers provides a dynamic, maintainable and scalable way to manage actions triggered by signals. It reduces the need for constant code changes while offering simple integration with popular external services.

Key Features

• Database-Driven Triggers: Automatically trigger actions based on model events (e.g., save, delete).
• Webhook Integration: Send HTTP requests to external services when triggers are activated.
• Message Broker Integration: Send messages to messaging brokers like Kafka and RabbitMQ.
• Actions Integration: Trigger actions like AWS Lambda functions based on model events.
• Extensible: Easily extend to support custom triggers and actions.
• Secure Dynamic Configuration: Dynamically set values at runtime for secure and flexible configuration.

Documentation

For detailed documentation, including setup, configuration options, API specifications, and more examples, please refer to the official documentation.

Supported Message Brokers

• Kafka
• RabbitMQ
• Redis
• AWS SQS (Amazon Simple Queue Service)
• AWS SNS (Amazon Simple Notification Service)
• GCP Pub/Sub (Google Cloud Pub/Sub)

Supported Actions

• AWS Lambda

Need support for another message broker or action? Please submit a feature request on the GitHub repository.

Installation

To install the package, run the following command:

pip install django-action-triggers

This command above will only install the base library, in order to support specific integrations, you can install the following extras:

Integration	Installation Command
RabbitMQ	pip install django-action-triggers[rabbitmq]
Kafka	pip install django-action-triggers[kafka]
Redis	pip install django-action-triggers[redis]
AWS SQS	pip install django-action-triggers[aws]
AWS SNS	pip install django-action-triggers[aws]
GCP Pub/Sub	pip install django-action-triggers[gcp]
AWS Lambda	pip install django-action-triggers[aws]
Webhooks	pip install django-action-triggers[webhooks]

Then, add the following to your INSTALLED_APPS in your Django settings:

INSTALLED_APPS = [
    ...
    'action_triggers',
    ...
]

If you plan on using the API, add the following to your urls.py:

from django.urls import path, include

urlpatterns = [
    ...
    path('api/action-triggers/', include('action_triggers.urls')),
    ...
]

Usage

Once installed, you can create triggers and actions using the Django admin interface or programmatically through the API.

For detailed usage instructions, configuration options, and examples, please refer to the official documentation.

Example Scenarios

Example 1: Webhook Trigger on User Creation/Update/Deletion

Trigger a webhook whenever a User model is created, updated, or deleted:

{
  "config_signals": [
    {"signal": "post_save"},
    {"signal": "post_delete"}
  ],
  "content_types": [
    {
      "app_label": "auth",
      "model_name": "User"
    }
  ],
  "webhooks": [
    {
      "url": "https://my-webhook.com",
      "http_method": "POST",
      "headers": {
        "Authorization": "Bearer {{ myapp.utils.get_token }}"
      },
      "timeout_secs": 22.5
    }
  ],
  "active": true
}

Example 2: Webhooks and Message Queues on Product and Sale Creation/Update

Trigger multiple webhooks and add messages to queues when Product or Sale models are created or updated:

{
  "config_signals": [
    {"signal": "post_save"}
  ],
  "content_types": [
    {
      "app_label": "myapp",
      "model_name": "Product"
    },
    {
      "app_label": "myapp",
      "model_name": "Sale"
    }
  ],
  "webhooks": [
    {
      "url": "https://my-webhook.com",
      "http_method": "POST",
      "headers": {
        "Authorization": "Bearer {{ myapp.utils.get_token }}"
      },
      "timeout_secs": 10.5
    },
    {
      "url": "https://my-other-webhook.com",
      "http_method": "POST",
      "headers": {
        "Authorization": "Bearer {{ myapp.utils.get_token }}"
      }
    }
  ],
  "msg_broker_queues": [
    {
      "name": "my-msg-broker-config",
      "parameters": {
        "product_id": "{{ myapp.utils.get_product_id }}"
      },
      "timeout_secs": 2.5
    },
    {
      "name": "my-other-msg-broker-config",
      "parameters": {
        "sale_id": "{{ myapp.utils.get_sale_id }}"
      }
    }
  ],
  "active": true
}

Don't See What You're Looking For?

If you have any feature requests or issues, please submit them to the GitHub repository. This also helps us prioritise new features and bug fixes.

License

This project is licensed under the MIT License - see LICENSE file for details.