(1) service locator option: names of impl classes are stored in META- INF/services/ as resource files.�
PROS: I believe this is what generally recommended by Sun CONS: The resource files are supposed to be read by class loader and class loaders in non-trivial environments tend to create non-trivial problems (think commons-logging)
Please, please, please don't do this! :)� Going off searching for resources that may or may not exist is very very bad in applets as it causes the ClassLoader to send a request back to the server which then returns a 404 and logs it.� This seriously reduces performance and really annoys web administrators.� I've not come across a lookup scheme that didn't cause huge problems for applets yet. (2) dependency injection option: dependent interface or a class factory is introduced though a setter or a contractor parameter
PROS: No need to retrieve any data from a file; Compatibility with popular DI/IoC containers CONS: Somewhat uglier API
Big fan of this - simple, effective and easily understood. Oleg
Adrian Sutton.
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