Polly - Polly is a

•    CSharp

---

Polly is a .NET resilience and transient-fault-handling library that allows developers to express policies such as Retry, Circuit Breaker, Timeout, Bulkhead Isolation, and Fallback in a fluent and thread-safe manner.Polly targets .NET 4.0, .NET 4.5 and .NET Standard 1.1 (coverage: .NET Core, Mono, Xamarin.iOS, Xamarin.Android, UWP, WP8.1+).

circuit-breaker circuit-breaker-pattern resilience resiliency-patterns retry-strategies fault-handler transient-fault-handling

tenacity - Retrying library for Python

•    Python

---

Tenacity is an Apache 2.0 licensed general-purpose retrying library, written in Python, to simplify the task of adding retry behavior to just about anything. It originates from a fork of retrying. The simplest use case is retrying a flaky function whenever an Exception occurs until a value is returned.

failure retry retry-library

rspec-retry - retry randomly failing rspec example

•    Ruby

---

RSpec::Retry adds a :retry option for intermittently failing rspec examples. If an example has the :retry option, rspec will retry the example the specified number of times until the example succeeds. You can call ex.run_with_retry(opts) on an individual example.

guava-retrying - This is a small extension to Google's Guava library to allow for the creation of configurable retrying strategies for an arbitrary function call, such as something that talks to a remote service with flaky uptime

•    Java

---

##What is this? The guava-retrying module provides a general purpose method for retrying arbitrary Java code with specific stop, retry, and exception handling capabilities that are enhanced by Guava's predicate matching. This is a fork of the excellent RetryerBuilder code posted here by Jean-Baptiste Nizet (JB). I've added a Gradle build for pushing it up to my little corner of Maven Central so that others can easily pull it into their existing projects with minimal effort. It also includes exponential and Fibonacci backoff WaitStrategies that might be useful for situations where more well-behaved service polling is preferred.

retry retry-library

bottleneck - Task scheduler and rate limiter

•    Javascript

---

Bottleneck is a lightweight and efficient Task Scheduler and Rate Limiter for Node.js and the browser. When dealing with services with limited resources, it's important to ensure that they don't become overloaded.Bottleneck is an easy solution as it does not add much complexity to your code.

rate-limits rate-limiting rate-limiter scheduler limiter clustering async-rate-limiter async rate limiting throttle throttling load ddos

node-rate-limiter - A generic rate limiter for node

•    Javascript

---

Provides a generic rate limiter for node.js. Useful for API clients, web crawling, or other tasks that need to be throttled. Two classes are exposed, RateLimiter and TokenBucket. TokenBucket provides a lower level interface to rate limiting with a configurable burst rate and drip rate. RateLimiter sits on top of the token bucket and adds a restriction on the maximum number of tokens that can be removed each interval to comply with common API restrictions like "150 requests per hour maximum". A synchronous method, tryRemoveTokens(), is available in both RateLimiter and TokenBucket. This will return immediately with a boolean value indicating if the token removal was successful.

rate limiting throttling

gorush - A push notification server written in Go (Golang).

•    Go

---

A push notification micro server using Gin framework written in Go (Golang).

push-notification ios-notification notification-server android gcm gorush-server apns ios-alert-payload ios messaging pub-sub message-queue

retry - A tiny library for retrying failing operations.

•    PHP

---

A tiny library for retrying failing operations. Since the network is reliable, things should always work. Am I right? For those cases when they don't, there is retry.

spring-retry

•    Java

---

Spring Retry provides an abstraction around retrying failed operations, with an emphasis on declarative control of the process and policy-based bahaviour that is easy to extend and customize. For instance, you can configure a plain POJO operation to retry if it fails, based on the type of exception, and with a fixed or exponential backoff.

resque-retry - A resque plugin; provides retry, delay and exponential backoff support for resque jobs

•    Ruby

---

A Resque plugin. Requires Resque ~> 1.25 & resque-scheduler ~> 4.0. This gem provides retry, delay and exponential backoff support for resque jobs.

node-retry - Abstraction for exponential and custom retry strategies for failed operations.

•    Javascript

---

Abstraction for exponential and custom retry strategies for failed operations. This module has been tested and is ready to be used.

golimit - Golimit is Uber ringpop based distributed and decentralized rate limiter

•    Go

---

Golimit is Uber ringpop based distributed and decentralized rate limiter. It is horizontally scalable and is based on shared nothing architecture. Every node in system is capable of handling read and writes of counters. It is designed to offer sub milliseconds latency to caller application. Recommended deployment topology is sidecar model. Every golimit node keeps local and global counter for api counter and local value is synchronized with other nodes on configurable periodic interval or at defined threshold. Http server provides http interface to increment counter against any arbitrary Key string. It also exposes admin api to manage global configurations.

rate-limiter ringpop distributed-systems rate-configs

node-ratelimiter - Abstract rate limiter for nodejs

•    Javascript

---

Rate limiter for Node.js backed by Redis.v3.0.2 - #33 by @promag - Use sorted set to limit with moving window.

rate ratelimit limiter limit

flask-limiter - rate limiting extension for flask applications

•    Python

---

Flask-Limiter provides rate limiting features to flask routes. It has support for a configurable backend for storage with current implementations for in-memory, redis and memcache. Add the rate limiter to your flask app. The following example uses the default in memory implementation for storage.

ratelimit - Rate limiter middleware

•    Javascript

---

Rate limiter middleware for koa.

koa middleware ratelimiter ratelimit rate

SQL Fault Retry Provider

•    

---

The Fault Retry sample demonstrates recommended practices for creating high availability database applications using SQL Server mirroring technology in the back end.

sql-server

async-retry - Retrying made simple, easy and async

•    Javascript

---

Retrying made simple, easy and async

async retry await

retry - A simple, stateless, functional mechanism to perform actions repetitively until successful.

•    Go

---

A simple, stateless, functional mechanism to perform actions repetitively until successful. This project is currently in "pre-release". While the code is heavily tested, the API may change. Vendor (commit or lock) this dependency if you plan on using it.

retry backoff functional stateless jitter delay limit wait linear incremental exponential fibonacci

axios-retry - Axios plugin that intercepts failed requests and retries them whenever possible

•    Javascript

---

Axios plugin that intercepts failed requests and retries them whenever possible. Note: Unless shouldResetTimeout is set, the plugin interprets the request timeout as a global value, so it is not used for each retry but for the whole request lifecycle.

retriable - Retriable is an simple DSL to retry failed code blocks with randomized exponential backoff

•    Ruby

---

Retriable is a simple DSL to retry failed code blocks with randomized exponential backoff time intervals. This is especially useful when interacting external APIs, remote services, or file system calls. If you need ruby 1.9.3 support, use the 2.x branch by specifying ~2.1 in your Gemfile.