A Haskell library that simplifies access to remote data, such as databases or web-based services.
Haskell
Latest commit 60f1c6b Feb 27, 2017 Simon Marlow committed with facebook-github-bot Add pOr and pAnd
Summary:
These two operators are subtly non-deterministic, but can potentially
improve performance significantly in cases where

* We don't want to use .|| because it's too sequential
* We don't want to use || because it forces us to do wasted work

(and equivalently for &&).

The implementation is a bit subtle, see Note [tricky pOr/pAnd]

Reviewed By: xich

Differential Revision: D4611809

fbshipit-source-id: 832ace29dfc44e48c14cc5d4f52a0114ee326c92

readme.md

Haxl Logo

Haxl

Haxl is a Haskell library that simplifies access to remote data, such as databases or web-based services. Haxl can automatically

  • batch multiple requests to the same data source,
  • request data from multiple data sources concurrently,
  • cache previous requests.

Having all this handled for you behind the scenes means that your data-fetching code can be much cleaner and clearer than it would otherwise be if it had to worry about optimizing data-fetching. We'll give some examples of how this works in the pages linked below.

There are two Haskell packages here:

  • haxl: The core Haxl framework
  • haxl-facebook (in example/facebook): An (incomplete) example data source for accessing the Facebook Graph API

To use Haxl in your own application, you will likely need to build one or more data sources: the thin layer between Haxl and the data that you want to fetch, be it a database, a web API, a cloud service, or whatever. The haxl-facebook package shows how we might build a Haxl data source based on the existing fb package for talking to the Facebook Graph API.

Where to go next?

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