Building a horizontally scalable API in php
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This document discusses building a horizontally scalable API in PHP. It covers using MySQL with binary hashes and separating data logically. It also discusses using CouchDB and features like stale views and document update handlers. It provides an example CouchDB update function. Additional topics include caching with Varnish and Membase, using the Zend Framework REST controller, and implementing API methods. The document also offers tips on PHP requests, exceptions, testing with JMeter, and links for further resources.
![Example update functionfunction (doc, req) { try { varobj = eval('(' + req.body + ')'); } catch (err) { return [null, { headers: { 'X-Status-Code': '400' }, body: 'Invalid JSON' }]; } if (!doc) { if (!obj.url) return [null, { headers: { 'X-Status-Code': '422' }, body: 'No URL' }]; doc = { _id: req.path[5], url: obj.url, statistics: [] }; } if (obj.url) delete obj.url; doc.statistics.push(obj); return [doc, 'OK'];}](https://image.slidesharecdn.com/buildingahorizontallyscalableapiinphp-110422044425-phpapp01/85/Building-a-horizontally-scalable-API-in-php-5-320.jpg)
![Example of implemented Methods public function implementedMethods() { if(!isset($this->_actionController)) return array(); $class = get_class($this->_actionController); $oReflector = new ReflectionClass($class); $methods = $oReflector->getMethods(ReflectionMethod::IS_PUBLIC); $implementedMethods = array();foreach($methods as $i => $method) /* @var $method ReflectionMethod */ { if($method->getDeclaringClass()->getName() == $class) $implementedMethods[] = str_replace('Action', '', $method->getName()); } return array_intersect($implementedMethods, array('get', 'put', 'post', 'delete', 'head', 'options', 'trace')); }](https://image.slidesharecdn.com/buildingahorizontallyscalableapiinphp-110422044425-phpapp01/85/Building-a-horizontally-scalable-API-in-php-8-320.jpg)
Building a horizontally scalable API in php
- 1. Building a horizontally scalable API in PHPyada...yada...title was really too long wasn’t it?
- 2. Presumptions
- 3. Working with MySQL5.1 + InnoDBPlugin or 5.5Binary hashesLearn the configuration optionsSeparation of data logically (e.g. user data vs. analytical data)
- 4. CouchDBCouchDB, Couchbase, BigCouch...Stale viewsNatural keysDocument update handlersDesign doc modification = rebuild
- 5. Example update functionfunction (doc, req) { try { varobj = eval('(' + req.body + ')'); } catch (err) { return [null, { headers: { 'X-Status-Code': '400' }, body: 'Invalid JSON' }]; } if (!doc) { if (!obj.url) return [null, { headers: { 'X-Status-Code': '422' }, body: 'No URL' }]; doc = { _id: req.path[5], url: obj.url, statistics: [] }; } if (obj.url) delete obj.url; doc.statistics.push(obj); return [doc, 'OK'];}
- 6. CachingVarnishMembase (distributed Memcache)Op code caching (disable file check)
- 7. Zend FrameworkDoes have a REST Controller (albeit pants, but it’s a starting point) – and we don’t call it Rest, we just call it an API Extend the controller as your baseGET/PUT/POST/DELETE/HEAD/OPTIONS on the extensionReflection allows automatic use of Allow headerOPTIONS can parse doc block for automation (@property)A global error controller is great for centralised management of errors.Re-use modules – you’ve got an API you can use.
- 8. Example of implemented Methods public function implementedMethods() { if(!isset($this->_actionController)) return array(); $class = get_class($this->_actionController); $oReflector = new ReflectionClass($class); $methods = $oReflector->getMethods(ReflectionMethod::IS_PUBLIC); $implementedMethods = array();foreach($methods as $i => $method) /* @var $method ReflectionMethod */ { if($method->getDeclaringClass()->getName() == $class) $implementedMethods[] = str_replace('Action', '', $method->getName()); } return array_intersect($implementedMethods, array('get', 'put', 'post', 'delete', 'head', 'options', 'trace')); }
- 9. PHPRequests using date ranges – break down using DateInterval then cachefopen(‘php://input’, ‘r’) for PUT data.Exception($message, $code, $previous)text/uri-list
- 10. BuildingSSH keysCI tool (Hudson/Jenkins) for testing and uploadingLots of boxes = distribution server
- 11. Testing (Stress)Apache JMeter is a great java GUI/CLI tool for both testing requests and stress testingAPI’s should inherently allow independent testing of minimal components at the user request level