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[Utility & Helpers](/categories/utility) 4. / 5. graze/transient-fault-handler ActiveLibrary[Utility & Helpers](/categories/utility) graze/transient-fault-handler ============================= Retry tasks that fail due to transient faults 0.3.1(5y ago)424.7k↓50%[1 issues](https://github.com/graze/transient-fault-handler/issues)1MITPHPPHP >=5.5.0 Since Mar 2Pushed 5y ago12 watchersCompare [ Source](https://github.com/graze/transient-fault-handler)[ Packagist](https://packagist.org/packages/graze/transient-fault-handler)[ Docs](https://github.com/graze/transient-fault-handler)[ RSS](/packages/graze-transient-fault-handler/feed)WikiDiscussions master Synced 1mo ago READMEChangelog (2)Dependencies (5)Versions (6)Used By (1) Transient Fault Handler ======================= [](#transient-fault-handler) [![Latest Version on Packagist](https://camo.githubusercontent.com/09dd9d48c32f44c0fab805703a688b0d5590806994cdf4f0384049636248aba0/68747470733a2f2f696d672e736869656c64732e696f2f7061636b61676973742f762f6772617a652f7472616e7369656e742d6661756c742d68616e646c65722e7376673f7374796c653d666c61742d737175617265)](https://packagist.org/packages/graze/transient-fault-handler)[![Software License](https://camo.githubusercontent.com/55c0218c8f8009f06ad4ddae837ddd05301481fcf0dff8e0ed9dadda8780713e/68747470733a2f2f696d672e736869656c64732e696f2f62616467652f6c6963656e73652d4d49542d627269676874677265656e2e7376673f7374796c653d666c61742d737175617265)](LICENSE.md)[![Build Status](https://camo.githubusercontent.com/e5b5b47b075633e78297db3d493d0f79f6331b52d72f55178c61a338c73d48fe/68747470733a2f2f696d672e736869656c64732e696f2f7472617669732f6772617a652f7472616e7369656e742d6661756c742d68616e646c65722f6d61737465722e7376673f7374796c653d666c61742d737175617265)](https://travis-ci.org/graze/transient-fault-handler)[![Coverage Status](https://camo.githubusercontent.com/269ff26c12095a43dfe9f9622c05218f30caae071f65537c3cf2b844d626e32f/68747470733a2f2f696d672e736869656c64732e696f2f7363727574696e697a65722f636f7665726167652f672f6772617a652f7472616e7369656e742d6661756c742d68616e646c65722e7376673f7374796c653d666c61742d737175617265)](https://scrutinizer-ci.com/g/graze/transient-fault-handler/code-structure)[![Quality Score](https://camo.githubusercontent.com/2943612c724379489a6b0d3c2027e81b1b5fcf7e90ed08e9828b69ac904b3a37/68747470733a2f2f696d672e736869656c64732e696f2f7363727574696e697a65722f672f6772617a652f7472616e7369656e742d6661756c742d68616e646c65722e7376673f7374796c653d666c61742d737175617265)](https://scrutinizer-ci.com/g/graze/transient-fault-handler)[![Total Downloads](https://camo.githubusercontent.com/3ea7bc34f40f00bc7583e2154147664f5a3c8d06e8b03cffe58ba7ddf618a991/68747470733a2f2f696d672e736869656c64732e696f2f7061636b61676973742f64742f6772617a652f7472616e7369656e742d6661756c742d68616e646c65722e7376673f7374796c653d666c61742d737175617265)](https://packagist.org/packages/graze/transient-fault-handler) Retries tasks that fail due to transient errors. Well suited to network requests but can retry any callable. Install ------- [](#install) Via Composer ``` composer require graze/transient-fault-handler ``` Usage ----- [](#usage) The transient fault handler takes two detection strategies and a retry strategy. The builder can be used to quickly create a handler. ``` $task = function () { // Task that is prone to transient errors }; $builder = new TransientFaultHandlerBuilder(); $transientFaultHandler = $builder->build(); $result = $transientFaultHandler->execute($task); ``` ### Detection Strategy [](#detection-strategy) When a task is tried, it will either return some value or throw an exception. The detection strategies will decide if that value/exception indicates a transient error or not. If it does, then the fault handler will be told to retry the task. if it does not, then the value/exception either indicates a success or a non-transient error that retrying wouldn't solve. In these cases, the value is returned to the caller or the exception is rethrown. - `FalseyReturnValueDetectionStrategy`: treats return values that [evaluate to false](http://php.net/manual/en/types.comparisons.php) as transient. - `StaticDetectionStrategy`: returns a static value set when constructing the strategy, regardless of the return value or exception. ### Retry Strategy [](#retry-strategy) If the detection strategy decides that the task should be retried, the retry strategy will decide how long to wait before doing so (the backoff period), and optionally impose a maximum number of retries on the task. - `ExponentialBackoffStrategy`: the backoff period is chosen randomly between zero and an exponentially increasing maximum. ### Builder [](#builder) The builder makes it easier to create a fault handler by automatically injecting dependencies. The default strategies that the builder uses can be overridden by using the setters. ``` $builder = new TransientFaultHandlerBuilder(); $transientFaultHandler = $builder ->setExceptionDetectionStrategy(new StaticDetectionStrategy()) ->setReturnValueDetectionStrategy(new FalseyReturnValueDetectionStrategy()) ->setRetryStrategy(new ExponentialBackoffStrategy()) ->setLogger(new Logger()) ->build(); ``` Change log ---------- [](#change-log) Please see [CHANGELOG](CHANGELOG.md) for more information what has changed recently. Testing ------- [](#testing) ``` make test ``` Contributing ------------ [](#contributing) Please see [CONTRIBUTING](CONTRIBUTING.md) for details. Security -------- [](#security) If you discover any security related issues, please email instead of using the issue tracker. Credits ------- [](#credits) - [Jake Wright](https://github.com/jakewright) - [All Contributors](../../contributors) License ------- [](#license) The MIT License (MIT). Please see [License File](LICENSE.md) for more information. ### Health Score 30 — LowBetter than 64% of packages Maintenance15 Infrequent updates — may be unmaintained Popularity29 Limited adoption so far Community15 Small or concentrated contributor base Maturity52 Maturing project, gaining track record Bus Factor1 Top contributor holds 54.5% of commits — single point of failure How is this calculated?**Maintenance (25%)** — Last commit recency, latest release date, and issue-to-star ratio. Uses a 2-year decay window. **Popularity (30%)** — Total and monthly downloads, GitHub stars, and forks. Logarithmic scaling prevents top-heavy scores. **Community (15%)** — Contributors, dependents, forks, watchers, and maintainers. Measures real ecosystem engagement. **Maturity (30%)** — Project age, version count, PHP version support, and release stability. ### Release Activity Cadence Every ~406 days Total 4 Last Release 2144d ago ### Community Maintainers ![](https://avatars.githubusercontent.com/u/637788?v=4)[graze.com](/maintainers/graze)[@graze](https://github.com/graze) --- Top Contributors [![biggianteye](https://avatars.githubusercontent.com/u/1482649?v=4)](https://github.com/biggianteye "biggianteye (6 commits)")[![jakewright](https://avatars.githubusercontent.com/u/5333300?v=4)](https://github.com/jakewright "jakewright (5 commits)") --- Tags retrynetworkinggrazetransient fault ### Code Quality TestsPHPUnit Code StylePHP\_CodeSniffer ### Embed Badge ![Health badge](/badges/graze-transient-fault-handler/health.svg) ``` [![Health](https://phpackages.com/badges/graze-transient-fault-handler/health.svg)](https://phpackages.com/packages/graze-transient-fault-handler) ``` ### Alternatives [graze/telnet-client Telnet client written in PHP 50233.9k4](/packages/graze-telnet-client)[vkartaviy/retry The library for repeatable and retryable operations 29227.2k2](/packages/vkartaviy-retry)[tobion/retry A generic library to retry an operation in case of an error. 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