I am struggling with how to implement configuration contribution. By
configuration contribution I simply mean
having a service being created *after* all modules have contributed their
share to a certain configuration.
For example having a database module generating a configuration object and
two other modules providing additional
information by taking the Configuration object and manipulate it. When the
final Database instance is created all those
modules have contributed their configuration changes to the Configuration
instance used by the Database instance to
initialize itself.
DatabaseModule {
1. configuration = new Configuration()
2. configuration.setDefaults();
3. new Database(configuration)
}
ModuleA requires DatabaseModule {
configuration.setDatabaseUrl("....");
}
ModuleB requires DatabaseModule {
configuration.setUsernameAndPassword("user", "password");
}
Thats just a made up example but I need such pattern very often where you
have to configure a kind of builder
or build receipt that is turned into the actual singleton or per thread
scoped object.
Any idea how to achieve this? I need to use custom objects as build receipt.
Cheers,
Martin (Kersten),
Germany
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