Dependancy Injection of Google guice doesnt work in Scala - scala

Question

I want to use DI google guice which works perfectly fine in Java but doesnt work in case of scala. Here is my code:
Module:
class ConfigModule extends AbstractModule{
override def configure(): Unit = {
}
#Provides
#Named("config")
def getConfig(): Config = {
new Config
}
}
Config
class Config {
val config1: String = "Sample"
}
Service
class Service(#Named("config") config:Config) {
def read(): Unit = {
println("Reading")
}
}
Main Class
object SampleJob {
def main(args: Array[String]): Unit = {
val injector = Guice.createInjector(new ConfigModule)
val service = injector.getInstance(classOf[Service])
service.read()
}
}
Error:
1) Could not find a suitable constructor in com.job.Service. Classes must have either one (and only one) constructor annotated with #Inject or a zero-argument constructor that is not private.
at com.job.Service.class(Service.scala:7)
while locating com.job.Service
Where am I mistaken?
UPDATE:
class Service(#Inject #Named("config") config:Config) {
def read(): Unit = {
println("Reading")
}
}
This also returns the same error
Could not find a suitable constructor in com.job.Service. Classes must have either one (and only one) constructor annotated with #Inject or a zero-argument constructor that is not private.
at com.job.Service.class(Service.scala:8)
while locating com.job.Service

Answer 1

The error tells you what happened:
Classes must have either one (and only one) constructor annotated with #Inject or a zero-argument constructor that is not private
So you need to add #Inject annotation... on your constructor like in tutorial.
Instead of
class Service(#Inject #Named("config") config:Config) {
def read(): Unit = {
println("Reading")
}
}
it should be
class Service #Inject() (#Named("config") config:Config) {
def read(): Unit = {
println("Reading")
}
}