Hi everyone, I'm trying to develop my new topologies using a proper design pattern, to achieve :
- Reusability of class - Unit testing / at least functional o Be able to mock database interaction through interfaces I worked a lot with PHP & Symfony which is a great framework to achieve those goals using dependency injection pattern I want to apply it to Storm topology development, but here is my problem : How can I pass dependency in constructor (e.g Cassandra provider, or id resolver, or even object hydrator), the bolt are instantiated when calling "prepare" method If I'm using a DI framework (like google Guice), how can I Mixed it with storm topology builder ? One idea : I think I can pass factories to my constructor and instantiate object in prepare method of my bolt But I'm not sure if it a good way to do it.. Did anybody ever experience it ? Does anyone have some best practices to develop topologies ? (regarding code engineering and organization) Thanks in advance, Regards Bastien
