Bhandar : Simple network/local source repository

Bhandar (ভান্ডার) is a simple repository implementation that can fetch data from a fetching source and (if configured) a store for cached access.

The repository using only one model for simplicity, so the implementation on the sources would need to convert to the shared model definition.

Gradle setup

Kotlin DSL

implementation("com.bidyut.tech.bhandar:bhandar:<version>")

Version Catalogue

[versions]
bhandar = "version"

[libraries]
bhandar = { group = "com.bidyut.tech.bhandar", name = "bhandar", version.ref = "bhandar" }

Configuring a repository

To create a new repository, we need to configure a fetcher and a storage. Let us assume a simple data model and request.

data class Request(
    val id: String,
)

data class DataModel(
    val id: String,
    val value: String,
)

So we need a fetcher like

val fetcher = DataFetcher.of<Request, DataModel> {
    // return Result.success() or Result.failure() based on the response
}

and a storage like

val storage = Storage.of<Request, DataModel>(
    read = { request -> 
        // return flow with the data or null
    },
    write = { request, newValue ->
        // write the data to the storage
    },
)

Optionally both the fetcher and storage can have a different validation check; by default it is just non-null.