"Framework Principal" pattern
- 1. “Framework Principal" pattern Philippe Rabier - twitter.com/prabier Sophiacom
- 4. •What is a Framework Principal? • Starter class automatically instantiated, very early • Used to initialize your stuffs • Independent from the Application • @see ERXFrameworkPrincipal
- 5. What is the goal? Resource optimization!
- 6. Feedback fromYou ’N Push
- 7. Sandbox environment 1 application Back Office FTP Server Web Services Job Scheduler In-App Purchase Service Push Notification Service
- 8. Production environment Back Office FTP Server Web Services Job Scheduler In-App Purchase Service Push Notification Service 4 applications
- 9. How to do that? Not rocket science!
- 10. • Make your FP runnable. Change the build.properties like this: principalClass=ca.wowodc.pascal.util.MyFrameworkPrincipal • Create an empty Wonder application • Add the frameworks to the classpath • Choose a rule for your properties file names like Properties.staging or Properties.production • Set your properties • Set the appropriate user name in the WOMonitor configuration • …et voilà! The Recipe
- 11. Skeleton of a FP public static boolean serviceMustRun() { return ERXProperties.booleanForKeyWithDefault("myServiceToLaunch", false); } public void finishInitialization() { if (serviceMustRun() ) { // your code ... } } public boolean isServiceRunning() { return a condition; }
- 12. Skeleton of a Properties file #Launch first service firstServiceToLaunch=true #second service is not running secondServiceToLaunch=false
- 13. WOMonitor configs The application will look for Properties.production file The application will look for Properties.sandbox file
- 14. 2 Strategies • Only one application • user name is different for each application • ex: Properties.scheduler, Properties.backoffice, … • Several specialized applications • user name is the same for every app like Properties.production • applications are different: scheduler.woa, backoffice.woa, …
- 15. Do you know? • ERRest can be configured in a FP (set up the request handler, the routes, …) • D2W applications could be defined in a FP (the ERXNavigationManager loads all navigationMenu.plist in any frameworks, the rules can be anywhere, …).