Façade design pattern implementation on Android

Description:

On this example, I'm using this pattern to abstract object persistence operations through a single interface (thanks to Gson) using the following strategies: memory cache (with Guava), database (with ActiveAndroid) and network cache (with OkHttp). This is great for performance and user experience on mobile applications.

Building:

In order to build the application, clone this repo recursively:

$ git clone git@github.com:Ruenzuo/android-facade-example.git --recursive

Then set up the dependencies and you're ready to go:

$ cd android-facade-example && gradle clean build

   

Design notes:

• Here's an UML diagram describing the pattern:

• The SyncService is not part of the façade. Therefore the code there it's a little messy.
• There are a lot of performance and test hooks and methods that you don't need to have on production.
• This has been tested on very large data sources it has 250 countries, 100 cities for each country and 10 stations for each city.
• Currently I'm not using any synchronization pattern, just checking if the data exists on database to make new requests.

To-Do:

• [✓] Make it public.
• [✓] Write the blog post. It's here.
• [ ] Add tests.
• [ ] Decide which strategy use depending on system resources like available memory, network state and others.
• [ ] Add synchronization pattern.

License

The MIT License (MIT)

Copyright (c) 2014 Renzo Crisóstomo

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