Today, we will learn caching technology in Xamarin.Forms as Monkey Cache.
Sometimes we need to store data in the application that we develop. For example, HTTP requests, configurations, settings, databases etc.
I need to store HTTP requests for a while during work on a project. I found Xamarin monkey cache while I search about caching strategies in that way.
What is monkey cache?
Monkey cache is a simple way to store any type of data. It supports SQLite-net, LiteDB, and a simple File Store. Monkey Cache is built against .NET Standard 2.0 and that means it is not just using with the mobile applications; it can use in any .NET projects.
How to use?
First of all, let’ s install Monkey Cache in our project from NuGet packages. You can use any file storage type in your project.
I prefer FileStore for this project. I install MonkeyCache 0.1.0.10-beta, MonkeyCache.FileStore 0.1.1.10-beta.
Data is stored in a “Barrel” or IBarrel. Don’t forget to give an application id on the barrel before storing data.
Barrel.ApplicationId = "your_unique_name_here";
If you want to do user-based cache, you can use some code like this:
Barrel.ApplicationId = "your-app-name" + UserId + DateTime.Now;
Caching a Web Request
Http request caching is very easy with Monkey Cache. We can set the expire time easily in this way:
Think like this scenario; I want to store the results of HTTP requests while if the user connected to the internet. I want to take these data from this cache if the user didn’t connect the internet and cached data didn’t expire. Now let’s take a look at the example:
|public async Task<CurrencyModel> GetCurrencyAsync()|
|var url = "https://lookup.binlist.net/45717360";|
|var client = new HttpClient();|
|if (!CrossConnectivity.Current.IsConnected && !Barrel.Current.IsExpired(key: url))|
|return Barrel.Current.Get<CurrencyModel>(key: url);|
|CurrencyModel result = null;|
|var response = await client.GetAsync(url);|
|result = JsonConvert.DeserializeObject<CurrencyModel>(response.Content.ReadAsStringAsync().Result);|
|Barrel.Current.Add(key: url, data: result, expireIn: TimeSpan.FromDays(1));|
We have seen together how to use Monkey cache today. Easy, right? You can use it over any caching scenario. Follow sample project here.
Happy Coding 🙂
You can find Monkey Cache Github source here.
You can find my previous article on Xamarin here.