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Programming language: Rust
License: MIT License
Tags: Database     Caching     Client     Driver     Cache     Memcache     Memcached    
Latest version: v0.14.0

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README

rust-memcache

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rust-memcache is a memcached client written in pure rust.

logo

Install

The crate is called memcache and you can depend on it via cargo:

[dependencies]
memcache = "*"

Features

  • [x] All memcached supported protocols
    • [x] Binary protocol
    • [x] ASCII protocol
  • [x] All memcached supported connections
    • [x] TCP connection
    • [x] UDP connection
    • [x] UNIX Domain socket connection
    • [x] TLS connection
  • [ ] Encodings
    • [x] Typed interface
    • [ ] Automatically compress
    • [ ] Automatically serialize to JSON / msgpack etc
  • [x] Memcached cluster support with custom key hash algorithm
  • [x] Authority
    • [x] Binary protocol (plain SASL authority plain)
    • [x] ASCII protocol

Basic usage

// create connection with to memcached server node:
let client = memcache::connect("memcache://127.0.0.1:12345?timeout=10&tcp_nodelay=true").unwrap();

// flush the database
client.flush().unwrap();

// set a string value
client.set("foo", "bar", 0).unwrap();

// retrieve from memcached:
let value: Option<String> = client.get("foo").unwrap();
assert_eq!(value, Some(String::from("bar")));
assert_eq!(value.unwrap(), "bar");

// prepend, append:
client.prepend("foo", "foo").unwrap();
client.append("foo", "baz").unwrap();
let value: String = client.get("foo").unwrap().unwrap();
assert_eq!(value, "foobarbaz");

// delete value:
client.delete("foo").unwrap();

// using counter:
client.set("counter", 40, 0).unwrap();
client.increment("counter", 2).unwrap();
let answer: i32 = client.get("counter").unwrap().unwrap();
assert_eq!(answer, 42);

Custom key hash function

If you have multiple memcached server, you can create the memcache::Client struct with a vector of urls of them. Which server will be used to store and retrive is based on what the key is.

This library have a basic rule to do this with rust's builtin hash function, and also you can use your custom function to do this, for something like you can using a have more data on one server which have more memory quota, or cluster keys with their prefix, or using consitent hash for large memcached cluster.

let mut client = memcache::connect(vec!["memcache://127.0.0.1:12345", "memcache:///tmp/memcached.sock"]).unwrap();
client.hash_function = |key: &str| -> u64 {
    // your custom hashing function here
    return 1;
};

Contributing

Before sending pull request, please ensure:

  • cargo fmt is being run;
  • Commit message is using gitmoji with first character is lower cased, for example: :sparkles: rust-memcache can print money now.

Contributors

License

MIT


*Note that all licence references and agreements mentioned in the rust-memcache README section above are relevant to that project's source code only.