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r2d2 v0.8.0 Release Notes

Release Date: 2017-11-26 // over 6 years ago

  • 🔄 Changed

    • 🔧 Pool configuration has changed. Rather than constructing a Config and passing it to the Pool constructor, you now configure a Builder which then directly constructs the pool:

      // In 0.7.x
let config = Config::builder()
    .min_idle(3)
    .build();
let pool = Pool::new(config, manager)?;

// In 0.8.x
let pool = Pool::builder()
    .min_idle(3)
    .build(manager)?;

    • 0️⃣ The Pool::new method can be used to construct a Pool with default settings:

      // In 0.7.x
let config = Config::default();
let pool = Pool::new(config, manager)?;

// In 0.8.x
let pool = Pool::new(manager)?;

    • The initialization_fail_fast configuration option has been replaced with separate Builder::build and Builder::build_unchecked methods. The second returns a Pool directly without wrapping it in a Result, and does not check that connections are being successfully opened:

      // In 0.7.x
let config = Config::builder()
    .initialization_fail_fast(false)
    .build();
let pool = Pool::new(config, manager).unwrap();

// In 0.8.x
let pool = Pool::builder().build_unchecked(manager);

    • 🔀 The InitializationError and GetTimeout error types have been merged into a unified Error type.

    • The Pool::config method has been replaced with accessor methods on Pool to directly access configuration, such as Pool::min_idle.

    • The scheduled_thread_pool crate has been upgraded from 0.1 to 0.2.

    ✂ Removed

    • ⏱ The deprecated Builder::num_threads method has been removed. Construct a ScheduledThreadPool and set it via Builder::thread_pool instead.