Nrthugu

I am new in Play Framework (Scala) and need some advise.

I use Scala 2.12 and Play Framework 2.6.20. I need to use several databases in my project. Right now I connected MySQL database as it says in documentation. How correctly connect project to remote Oracle 12g database?

application.conf:

db {

  mysql.driver = com.mysql.cj.jdbc.Driver

  mysql.url = "jdbc:mysql://host:port/database?characterEncoding=UTF-8"

  mysql.username = "username"

  mysql.password = "password"

}

First of all to lib folder I put ojdbc8.jar file from oracle website.

Then add libraryDependencies += "com.oracle" % "ojdbc8" % "12.1.0.1" code to sbt.build file. Finally I wrote settings to aplication.conf file.

After that step I notice error in terminal:

[error] (*:update) sbt.ResolveException: unresolved dependency: com.oracle#ojdbc8;12.1.0.1: not found

[error] Total time: 6 s, completed 10.11.2018 16:48:30

Java HotSpot(TM) 64-Bit Server VM warning: ignoring option MaxPermSize=256M; support was removed in 8.0

EDIT:

application.conf:

db {

  mysql.driver = com.mysql.cj.jdbc.Driver

  mysql.url = "jdbc:mysql://@host:@port/@database?characterEncoding=UTF-8"

  mysql.username = "@username"

  mysql.password = "@password"



  oracle.driver = oracle.jdbc.driver.OracleDriver

  oracle.url = "jdbc:oracle:thin:@host:@port/@sid"

  oracle.username = "@username"

  oracle.password = "@password"

}

ERROR:

play.api.UnexpectedException: Unexpected exception[CreationException: Unable to create injector, see the following errors:



1) No implementation for play.api.db.Database was bound.

  while locating play.api.db.Database

    for the 1st parameter of controllers.GetMarkersController.<init>(GetMarkersController.scala:14)

  while locating controllers.GetMarkersController

    for the 7th parameter of router.Routes.<init>(Routes.scala:45)

  at play.api.inject.RoutesProvider$.bindingsFromConfiguration(BuiltinModule.scala:121):

Binding(class router.Routes to self) (via modules: com.google.inject.util.Modules$OverrideModule -> play.api.inject.guice.GuiceableModuleConversions$$anon$1)

GetMarkersController.scala:

package controllers



import javax.inject._



import akka.actor.ActorSystem

import play.api.Configuration

import play.api.mvc.{AbstractController, ControllerComponents}

import play.api.libs.ws._

import scala.concurrent.duration._

import scala.concurrent.{ExecutionContext, Future, Promise}

import services._

import play.api.db.Database



class GetMarkersController @Inject()(db: Database, conf: Configuration, ws: WSClient, cc: ControllerComponents, actorSystem: ActorSystem)(implicit exec: ExecutionContext) extends AbstractController(cc) {

    def getMarkersValues(start_date: String, end_date: String) = Action.async {

        getValues(1.second, start_date: String, end_date: String).map {

            message => Ok(message)

        }

    }



    private def getValues(delayTime: FiniteDuration, start_date: String, end_date: String): Future[String] = {

        val promise: Promise[String] = Promise[String]()

        val service: GetMarkersService = new GetMarkersService(db)

        actorSystem.scheduler.scheduleOnce(delayTime) {

            promise.success(service.get_markers(start_date, end_date))

        }(actorSystem.dispatcher)

        promise.future

    }

}

You cannot access Oracle without credentials. You need to have an account with Oracle. Then add something like the following to your build.sbt file

resolvers += "Oracle" at "https://maven.oracle.com"



credentials += Credentials("Oracle", "maven.oracle.com", "username", "password")

More information about accessing the OTN: https://docs.oracle.com/middleware/1213/core/MAVEN/config_maven_repo.htm#MAVEN9012

If you have the hard coded jar, you don't need to include as a dependency. See unmanagedDependencies https://www.scala-sbt.org/1.x/docs/Library-Dependencies.html