Database

Overview

Kweb integrates nicely with Shoebox, a key-value store that supports the observer pattern, and a sister project to Kweb. Shoebox has both in-memory and persistent (filesystem) engines.

In the future Shoebox will support back-end cloud services like AWS Pub/Sub Messaging and Dynamo DB, which would enable unlimited scalability.

We’ll assume you’ve taken a minute or two to review Shoebox and get the general idea of how it’s used.

Shoebox and State

This example shows how toVar can be used to convert a value in a Shoebox to a KVar:

fun main() {
    data class User(val name : String, val email : String)
    val users = Shoebox<User>()
    users["aaa"] = User("Ian", "[email protected]")

    Kweb(port = 16097) {
        doc.body.new {
            val user = toVar(users, "aaa")
            ul().new {
                li().text(user.map {"Name: ${it.name}"})
                li().text(user.map {"Email: ${it.email}"})

            }
        }
    }
}

Other Databases

Kweb doesn’t require you to use Shoebox, you’re free to use any database, either directly, or via a database abstraction layer of your choosing.

Working Example

For a more complete example of using Shoebox for persistent storage see the to do demo.