failsafe-rs
所属分类：硬件设计
开发工具：Rust
文件大小：0KB
下载次数：0
上传日期：2022-12-12 20:14:41
上 传 者：
sh-1993
说明： 生锈的断路器实施，
(A circuit breaker implementation for rust,)
文件列表:
.appveyor.yml (956, 2022-08-22)
.circleci/ (0, 2022-08-22)
.circleci/cache-key (346, 2022-08-22)
.circleci/cargo-lint (467, 2022-08-22)
.circleci/config.yml (1765, 2022-08-22)
CHANGELOG.md (1983, 2022-08-22)
Cargo.lock (23104, 2022-08-22)
Cargo.toml (914, 2022-08-22)
benches/ (0, 2022-08-22)
benches/circuit_breaker.rs (1668, 2022-08-22)
benches/futures.rs (1510, 2022-08-22)
benches/state_machine.rs (1484, 2022-08-22)
benches/windowed_adder.rs (582, 2022-08-22)
src/ (0, 2022-08-22)
src/backoff.rs (7681, 2022-08-22)
src/circuit_breaker.rs (3969, 2022-08-22)
src/clock.rs (1340, 2022-08-22)
src/config.rs (1779, 2022-08-22)
src/ema.rs (4119, 2022-08-22)
src/error.rs (747, 2022-08-22)
src/failure_policy.rs (14784, 2022-08-22)
src/failure_predicate.rs (847, 2022-08-22)
src/futures/ (0, 2022-08-22)
src/futures/mod.rs (7068, 2022-08-22)
src/instrument.rs (728, 2022-08-22)
src/lib.rs (2903, 2022-08-22)
src/state_machine.rs (12911, 2022-08-22)
src/windowed_adder.rs (6778, 2022-08-22)
# Failsafe
[](https://crates.io/crates/failsafe)
[](https://docs.rs/failsafe)
[](https://circleci.com/gh/dmexe/failsafe-rs)
[](https://ci.appveyor.com/project/dmexe/failsafe-rs/branch/master)
A circuit breaker implementation which used to detect failures and encapsulates the logic of preventing a
failure from constantly recurring, during maintenance, temporary external system failure or unexpected
system difficulties.
* [https://martinfowler.com/bliki/CircuitBreaker.html](https://martinfowler.com/bliki/CircuitBreaker.html)
* [Read documentation](https://docs.rs/failsafe/1.2.0/failsafe)
# Features
* Working with both `Fn() -> Result` and `Future` (optional via default
`futures-support` feature).
* Backoff strategies: `constant`, `exponential`, `equal_jittered`, `full_jittered`
* Failure detection policies: `consecutive_failures`, `success_rate_over_time_window`
* Minimum rust version: 1.49
# Usage
Add this to your Cargo.toml:
```toml
failsafe = "1.2.0"
```
# Example
Using default backoff strategy and failure accrual policy.
```rust
use failsafe::{Config, CircuitBreaker, Error};
// A function that sometimes failed.
fn dangerous_call() -> Result<(), ()> {
if thread_rng().gen_range(0, 2) == 0 {
return Err(())
}
Ok(())
}
// Create a circuit breaker which configured by reasonable default backoff and
// failure accrual policy.
let circuit_breaker = Config::new().build();
// Call the function in a loop, after some iterations the circuit breaker will
// be in a open state and reject next calls.
for n in 0..100 {
match circuit_breaker.call(|| dangerous_call()) {
Err(Error::Inner(_)) => {
eprintln!("{}: fail", n);
},
Err(Error::Rejected) => {
eprintln!("{}: rejected", n);
break;
},
_ => {}
}
}
```
Or configure custom backoff and policy:
```rust
use std::time::Duration;
use failsafe::{backoff, failure_policy, CircuitBreaker};
// Create an exponential growth backoff which starts from 10s and ends with 60s.
let backoff = backoff::exponential(Duration::from_secs(10), Duration::from_secs(60));
// Create a policy which failed when three consecutive failures were made.
let policy = failure_policy::consecutive_failures(3, backoff);
// Creates a circuit breaker with given policy.
let circuit_breaker = Config::new()
.failure_policy(policy)
.build();
```
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