tiny-db 0.1.0

A "tiny database" and accompanying protocol

This example shows the usage of shared state amongst all connected clients, namely a database of key/value pairs. Each connected client can send a series of GET/SET commands to query the current value of a key or set the value of a key.

This example has a simple protocol you can use to interact with the server. To run, first run this in one terminal window:

cargo run

and next in another windows run:

nc 127.0.0.1 6142

In the connect window you can type in commands where when you hit enter you'll get a response from the server for that command. An example session is:

$ nc 127.0.0.1 6142 GET foo foo = bar GET FOOBAR error: no key FOOBAR SET FOOBAR my awesome string set FOOBAR = my awesome string, previous: None SET foo tokio set foo = tokio, previous: Some("bar") GET foo foo = tokio

Namely you can issue two forms of commands:

• GET $key - this will fetch the value of $key from the database and return it. The server's database is initially populated with the key foo set to the value bar
• SET $key $value - this will set the value of $key to $value, returning the previous value, if any.