Hands-On Microservices with Rust

Dependencies

Create a new binary crate and add all of the necessary dependencies to the Cargo.toml file of that crate:

[dependencies]clap = "2.32"failure = "0.1"r2d2 = "0.8"r2d2_redis = "0.8"redis = "0.9"

We added the dependencies that we used in the previous examples of this chapter—clap, failure, and r2d2. Also, we need the redis and r2d2_redis crates, which contain a connection manager for Redis so that we can use it with Pool from the r2d2 crate.

Next, let's import the types we need to create a tool:

use clap::{    crate_authors, crate_description, crate_name, crate_version,    App, AppSettings, Arg, SubCommand,};use redis::{Commands, Connection, RedisError};use r2d2_redis::RedisConnectionManager;use std::collections::HashMap;

Note the usage ...