Back Sync

Module responsible for syncing data from Facebook. It's built to be very modular and to offer a CLI tool for testing each sync method.

Roles

• Library to fetch data from Facebook. Be short and to the point: you've to pick which ID you want to sync, so you can sync a single object or many.
• CLI tool to consume this library from command line commands.
• Background service to consume this library from received messages.

Plugins Modularity

Plugins are placed in lib folder and CLI commands are placed in bin folder.

The plugins are used for communication with the Facebook API and will perform the requests in their platform.

The commands will barely call these plugins to print data in the console.

Types of Plugins

The existing types of plugins are:

• lib/auth: Plugins used for authorisation.
• lib/data: Plugins used for creating requests which will eventually be sent to the API.
• lib/request: Plugins for making data requests to the API.

Separation of Concerns

Data plugins shouldn't make any call to the Facebook API. Instead, they'll just return the request method, endpoint and arguments.

Making the API call is a task for request plugins. There are two request plugins:

• Single request: It's used only in CLI and will perform a single request to the Facebook API.
• Batched request: It's used in the Back Sync service and will perform batches with up to 50 commands to the Facebook API in order to save API calls.

This separation of concerns will make it easy to develop additional data plugins and plug and play into both request plugins whenever desired.

License

Apache 2.0.