Hands-On Microservices with Rust

Actors

Our actor has to keep an instance of Client. We don't use a connection pool, because we will use multiple actors for handing parallel requests to a database. Look at the following struct:

pub struct CacheActor {    client: Client,    expiration: usize,}

The struct also contains an expiration field that holds the time-to-live (TTL) period. This defines how long Redis will hold the value.

Add a new method to the implementation that uses a provided address string to create a Client instance, and adds both the client and expiration values to the CacheActor struct, as follows:

impl CacheActor {    pub fn new(addr: &str, expiration: usize) -> Self {        let client = Client::open(addr).unwrap();        Self { client, expiration }    }}

Also, we have to implement ...