I'm new to Play framework and all the Scala stack. I'm trying to implement dependency injection using macwire and ReactiveMongo to handle my MongoDB database.
I have this classes to define repositories.
trait BaseRepository extends ReactiveMongoComponents {
/**
* collection to retrieve documents from when accessing the database
*/
val collectionName: String
/**
*
* @return collection future instance
*/
def collection: Future[BSONCollection] = reactiveMongoApi.database.map{
_.collection(collectionName)
}(dbContext)
}
UserRepository Trait:
trait UserRepository extends BaseRepository {
def findUserByUsername(username: String): User
}
Repository Implementation:
class UserRepositoryImpl(val reactiveMongoApi: ReactiveMongoApi) extends UserRepository {
override val collectionName = "user"
override def findUserByUsername(username: String): User = User("user", "password")
}
I'm trying to wire the dependencies through 'wire' method like this:
trait RepositoryModule {
import com.softwaremill.macwire._
lazy val reactiveMongoApi = wire[ReactiveMongoApi]
lazy val userDAO = wire[UserRepositoryImpl]
}
And I have an application loader defined like this:
class MyApplicationLoader extends ApplicationLoader {
def load(context: Context): Application = new AppComponents(context).application
}
class AppComponents(context: Context) extends ReactiveMongoApiFromContext(context)
with AppModule
with AssetsComponents
with I18nComponents
with play.filters.HttpFiltersComponents {
// set up logger
LoggerConfigurator(context.environment.classLoader).foreach {
_.configure(context.environment, context.initialConfiguration, Map.empty)
}
lazy val router: Router = {
// add the prefix string in local scope for the Routes constructor
val prefix: String = "/"
wire[Routes]
}
}
But I get the error:
Cannot find a public constructor nor a companion object for [play.modules.reactivemongo.ReactiveMongoApi
Notice that I have extended ReactiveMongoApiFromContext
in my ApplicationLoader
.
I am also extending ReactiveMongoComponents
in my repository to be able to access the reactiveMongoApi
which gives me access to the database. Is that correct?
How can I wire the ReactiveMongoApi in my implementation of the repository so I can access the database and collections?