async-retry vs promise-poller vs promise-retry vs retry vs wait-for-expect
JavaScript Retry Mechanisms
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JavaScript Retry Mechanisms

These npm packages provide various strategies for retrying asynchronous operations in JavaScript, particularly useful in scenarios where operations may fail due to transient errors, such as network requests or database queries. They help ensure that applications can gracefully handle failures and improve reliability by automatically retrying failed operations based on defined rules and conditions.

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async-retry01,915-305 years agoMIT
promise-poller0119-87 years agoMIT
promise-retry0318-116 years agoMIT
retry01,259-205 years agoMIT
wait-for-expect029838.3 kB109 months agoMIT

Feature Comparison: async-retry vs promise-poller vs promise-retry vs retry vs wait-for-expect

Retry Logic

  • async-retry:

    async-retry offers a flexible retry logic that allows you to specify the number of attempts, delay between retries, and custom error handling. It supports exponential backoff strategies, making it suitable for handling transient errors in network requests or database operations.

  • promise-poller:

    promise-poller implements a polling mechanism that repeatedly invokes a promise-returning function until a specified condition is met. It allows you to define the polling interval and timeout, making it ideal for scenarios where you need to wait for a resource to become available.

  • promise-retry:

    promise-retry provides a simple way to retry promise-returning functions with customizable retry logic. You can specify the number of retries, delay between attempts, and handle specific error cases, making it effective for handling failures in asynchronous operations.

  • retry:

    retry is a versatile package that can handle both synchronous and asynchronous functions. It allows you to define retry strategies, including maximum attempts and delays, and provides a straightforward API for implementing retries across various use cases.

  • wait-for-expect:

    wait-for-expect is tailored for testing scenarios, allowing you to wait for specific expectations to be met in asynchronous tests. It simplifies the process of writing tests that involve asynchronous operations, ensuring that your assertions are only checked when the expected conditions are satisfied.

Use Cases

  • async-retry:

    Best suited for applications that make frequent network requests or interact with unreliable services, where transient failures are common and need to be handled gracefully with retries.

  • promise-poller:

    Ideal for scenarios where you need to check the status of an operation or resource repeatedly until it becomes available, such as waiting for a file to be uploaded or a service to be ready.

  • promise-retry:

    Great for retrying operations that may fail due to temporary issues, such as API calls, where you want to implement a simple retry mechanism without complex configurations.

  • retry:

    Useful for a wide range of applications that require retries for both synchronous and asynchronous operations, including database queries and external service calls.

  • wait-for-expect:

    Specifically designed for testing frameworks, making it essential for writing tests that involve asynchronous operations and ensuring that your tests are reliable and accurate.

Configuration Flexibility

  • async-retry:

    Highly configurable, allowing developers to customize retry attempts, delays, and error handling strategies to fit specific application needs. It supports both linear and exponential backoff strategies.

  • promise-poller:

    Provides options for customizing polling intervals and timeouts, giving developers control over how often to check for conditions and how long to wait before giving up.

  • promise-retry:

    Offers straightforward configuration options for retries, including the number of attempts and delay, making it easy to implement without extensive setup.

  • retry:

    Flexible in defining retry strategies, allowing for detailed configurations that can adapt to various use cases, whether for synchronous or asynchronous functions.

  • wait-for-expect:

    Simplifies configuration for test scenarios, allowing developers to specify the conditions and timeouts for expectations in a clear and concise manner.

Error Handling

  • async-retry:

    Includes built-in support for handling specific errors, allowing developers to define which errors should trigger a retry and which should not, enhancing control over the retry process.

  • promise-poller:

    Handles errors gracefully by allowing the polling to continue until the condition is met or the timeout is reached, ensuring that transient errors do not halt the polling process.

  • promise-retry:

    Provides mechanisms to handle errors during retries, allowing developers to specify which errors should trigger a retry and how to manage them effectively.

  • retry:

    Offers robust error handling capabilities, enabling developers to specify retry conditions based on error types, making it suitable for complex error scenarios.

  • wait-for-expect:

    Focuses on ensuring that expectations are met before proceeding, providing clear error messages when expectations fail, which is crucial for debugging tests.

Learning Curve

  • async-retry:

    Relatively easy to learn, especially for developers familiar with promises and async/await syntax. Its API is straightforward and intuitive, making it accessible for quick implementation.

  • promise-poller:

    Simple to understand and use, especially for those familiar with polling concepts. The API is designed to be user-friendly, allowing for quick integration into projects.

  • promise-retry:

    Very easy to grasp, with a minimalistic API that allows developers to implement retries with just a few lines of code, making it suitable for quick solutions.

  • retry:

    Moderate learning curve due to its versatility and broader use cases. However, once understood, it can be applied to various scenarios effectively.

  • wait-for-expect:

    Designed for developers familiar with testing frameworks, it has a straightforward API that integrates seamlessly into test cases, making it easy to adopt.

How to Choose: async-retry vs promise-poller vs promise-retry vs retry vs wait-for-expect

  • async-retry:

    Choose async-retry if you need a simple and flexible way to retry asynchronous functions with customizable retry strategies, including delays and maximum attempts. It is particularly useful for handling promises and async/await syntax.

  • promise-poller:

    Select promise-poller when you need to repeatedly execute a promise-returning function until a certain condition is met, providing a polling mechanism that can be customized with intervals and timeouts. It's ideal for scenarios where you want to wait for a resource to become available.

  • promise-retry:

    Use promise-retry if you want a straightforward way to retry promise-returning functions with a focus on handling errors and customizing the retry logic. It allows for a simple configuration of retries and delays, making it suitable for straightforward retry needs.

  • retry:

    Opt for retry when you want a more general-purpose retry mechanism that can handle both synchronous and asynchronous functions. It provides a robust API for defining retry strategies and is useful for retrying operations that may not return promises.

  • wait-for-expect:

    Choose wait-for-expect if you are writing tests and need a way to wait for asynchronous expectations to be met. This package is specifically designed for testing frameworks and helps ensure that your tests only proceed once certain conditions are satisfied.

Similar Npm Packages to async-retry

async-retry is a utility library for retrying asynchronous functions in JavaScript. It provides a simple and flexible way to handle retries for operations that may fail intermittently, such as network requests or database operations. With async-retry, developers can easily specify the number of retries, delay between attempts, and conditions under which to retry, making it a powerful tool for improving the resilience of applications. However, there are several alternatives available that offer similar functionality. Here are a few noteworthy options:

  • p-retry is a promise-based retry utility that allows you to retry asynchronous functions with customizable options. It is designed to work seamlessly with promises, making it a great choice for modern JavaScript applications. p-retry provides a straightforward API for defining retry logic, including the number of retries, delay between attempts, and error handling. If you are looking for a lightweight and promise-centric solution for retrying asynchronous operations, p-retry is an excellent option.

  • promise-retry is another library that focuses on retrying promise-returning functions. It offers a simple API for defining retry logic, including options for maximum retries, delay, and exponential backoff. promise-retry is particularly useful for scenarios where you need to handle transient errors in asynchronous operations, such as API calls or database queries. If you prefer a library that emphasizes simplicity and ease of use, promise-retry is worth considering.

  • retry is a more general-purpose retry utility that can be used with both synchronous and asynchronous functions. It provides a flexible API for configuring retries, including options for maximum attempts, delay, and backoff strategies. retry is suitable for a wide range of use cases, making it a versatile choice for developers who need a robust retry mechanism. If you require a library that can handle both sync and async operations with customizable retry logic, retry is a solid option.

  • retry-axios is a specialized library designed to work with Axios, the popular HTTP client for JavaScript. It provides automatic retry functionality for failed HTTP requests, making it easy to handle transient errors in network communication. With retry-axios, you can configure retry options such as the number of attempts and delay between retries, all while leveraging the familiar Axios API. If you are using Axios for your HTTP requests and want to add retry capabilities, retry-axios is a great choice.

For a comprehensive comparison of these libraries, check out the link: Comparing async-retry vs p-retry vs promise-retry vs retry vs retry-axios.

Similar Npm Packages to promise-poller

promise-poller is a utility library designed to simplify the process of polling asynchronous operations in JavaScript. It allows developers to repeatedly execute a promise-based function until a specified condition is met or a maximum number of attempts is reached. This can be particularly useful in scenarios where you need to wait for a resource to become available or for an operation to complete successfully. By providing a straightforward API for polling, promise-poller helps streamline the implementation of retry logic in applications.

While promise-poller is a great option for polling, there are several alternatives that offer similar functionality:

  • async-retry is a library that provides a simple way to retry asynchronous functions with customizable retry strategies. It allows developers to specify the number of retries, delay between attempts, and conditions for retrying. If you need a more flexible and configurable approach to retrying asynchronous operations, async-retry is an excellent choice.
  • promise-retry is another library focused on retrying promise-based functions. It offers a straightforward API for retrying promises with customizable options such as retries, delay, and error handling. If you are looking for a lightweight solution to handle retries for promise-based functions, promise-retry is a solid option.
  • retry is a general-purpose retry library that can be used for both synchronous and asynchronous operations. It provides a flexible API that allows developers to define retry strategies, including the number of attempts, delay between retries, and error handling. If you need a versatile solution that can handle retries for various types of functions, retry is a great choice.
  • wait-for-expect is a utility primarily designed for testing environments, allowing developers to wait for certain conditions to be met before proceeding. While it is not specifically a polling library, it can be used to wait for asynchronous operations to complete in a testing context. If your focus is on testing and you need to wait for specific conditions, wait-for-expect might be the right tool for you.

To see how promise-poller compares with async-retry, promise-retry, retry, and wait-for-expect, check out the comparison: Comparing async-retry vs promise-poller vs promise-retry vs retry vs wait-for-expect.

Similar Npm Packages to promise-retry

promise-retry is a utility library that allows developers to retry asynchronous operations that return promises. This can be particularly useful for handling transient errors in network requests or other operations that may fail intermittently. By providing a simple API to specify the number of retries and the delay between attempts, promise-retry helps ensure that applications can gracefully handle failures and improve their resilience.

While promise-retry is a solid choice for retrying promises, there are several alternatives in the JavaScript ecosystem that offer similar functionality. Here are a few noteworthy options:

  • async-retry is a library designed for retrying asynchronous functions with a simple and flexible API. It allows developers to specify the number of retries, delay between attempts, and even customize the retry logic based on the type of error encountered. async-retry is particularly useful for scenarios where you need more control over the retry behavior and want to handle different types of errors differently.

  • p-retry is another lightweight library that focuses on retrying promises. It provides a straightforward API that allows you to specify the number of retries, delay, and a predicate function to determine if the operation should be retried based on the error. p-retry is a great choice for developers looking for a simple and effective way to implement retry logic in their applications without additional overhead.

  • promise-poller is a utility for polling asynchronous operations until they succeed or a specified timeout is reached. While it is not strictly a retry library, it can be used to repeatedly check the status of an operation at specified intervals. This is especially useful for scenarios where you need to wait for a resource to become available or for a condition to be met.

  • retry is a more general-purpose library for retrying functions, not limited to promises. It provides a flexible way to specify retry strategies, including exponential backoff and custom error handling. This library is suitable for developers who want a more comprehensive solution for retrying both synchronous and asynchronous operations.

  • retry-axios is an Axios interceptor that automatically retries failed HTTP requests. It integrates seamlessly with Axios, allowing developers to specify retry logic directly in their HTTP client configuration. If you are using Axios for making HTTP requests and want built-in retry functionality, retry-axios is an excellent choice.

To see how promise-retry compares with async-retry, p-retry, promise-poller, retry, and retry-axios, check out the comparison: Comparing async-retry vs p-retry vs promise-poller vs promise-retry vs retry vs retry-axios.

Similar Npm Packages to retry

retry is a versatile npm package designed to provide a simple way to retry asynchronous operations in JavaScript. This can be particularly useful in scenarios where network requests or other operations may fail intermittently and need to be retried. The retry package allows developers to specify the number of attempts, delay between attempts, and other customizable options, making it a flexible solution for handling transient errors.

While retry is a solid choice, there are several alternatives in the ecosystem that offer similar functionality with different features and approaches. Here are a few noteworthy alternatives:

  • async-retry is a lightweight library that provides a simple way to retry asynchronous functions with customizable options. It supports exponential backoff and allows you to define the number of attempts and the delay between retries. async-retry is particularly useful for handling promises and works seamlessly with async/await syntax, making it a great choice for modern JavaScript applications.

  • backoff is a library that implements exponential backoff algorithms for retrying operations. It provides a more sophisticated approach to retries, allowing developers to define custom backoff strategies. This can be particularly useful in scenarios where you want to avoid overwhelming a server with repeated requests in a short period. backoff is suitable for applications that require fine-tuned control over retry behavior.

  • promise-retry is another library focused on retrying promise-based functions. It offers a straightforward API for retrying failed promises with customizable options for the number of retries and delay. promise-retry is a good choice for developers who want a simple and effective way to handle retries in promise-based workflows.

  • retry-axios is a specialized library that integrates the retry functionality directly with the Axios HTTP client. It allows you to automatically retry failed HTTP requests made with Axios, providing a seamless experience for handling transient network errors. If you are already using Axios in your application, retry-axios can be a great addition to enhance its resilience.

  • retry-request is a library that extends the functionality of the popular request library by adding retry capabilities. It allows you to specify retry options for HTTP requests, making it easier to handle transient errors when making network calls. If you are using the request library, retry-request can provide a straightforward way to add retry logic to your requests.

To compare these packages and see how they stack up against each other, check out the following link: Comparing async-retry vs backoff vs promise-retry vs retry vs retry-axios vs retry-request.

README for async-retry

async-retry

Retrying made simple, easy, and async.

Usage

// Packages
const retry = require('async-retry');
const fetch = require('node-fetch');

await retry(
  async (bail) => {
    // if anything throws, we retry
    const res = await fetch('https://google.com');

    if (403 === res.status) {
      // don't retry upon 403
      bail(new Error('Unauthorized'));
      return;
    }

    const data = await res.text();
    return data.substr(0, 500);
  },
  {
    retries: 5,
  }
);

API

retry(retrier : Function, opts : Object) => Promise
  • The supplied function can be async or not. In other words, it can be a function that returns a Promise or a value.
  • The supplied function receives two parameters
    1. A Function you can invoke to abort the retrying (bail)
    2. A Number identifying the attempt. The absolute first attempt (before any retries) is 1.
  • The opts are passed to node-retry. Read its docs
    • retries: The maximum amount of times to retry the operation. Default is 10.
    • factor: The exponential factor to use. Default is 2.
    • minTimeout: The number of milliseconds before starting the first retry. Default is 1000.
    • maxTimeout: The maximum number of milliseconds between two retries. Default is Infinity.
    • randomize: Randomizes the timeouts by multiplying with a factor between 1 to 2. Default is true.
    • onRetry: an optional Function that is invoked after a new retry is performed. It's passed the Error that triggered it as a parameter.

Authors

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