I am using play-scala-starter-example as the base for my application. I want to use 'slick' for accessing mysql DB. After following https://playframework.com/documentation/2.5.x/PlaySlick I added following lines in application.conf
slick.dbs.default.driver="slick.driver.MySQLDriver$"
slick.dbs.default.db.driver=com.mysql.jdbc.Driver
slick.dbs.default.db.url="jdbc:mysql://localhost/playexamplemysql?characterEncoding=UTF-8"
slick.dbs.default.db.username="user"
slick.dbs.default.db.password="password"
The import is used in DbController.scala as follows:
import play.api.mvc._
import play.api.db._
import play.api.libs.json._
import play.api.libs.functional.syntax._
import slick.DatabaseConfigProvider
import slick.jdbc.JdbcProfile
import slick.driver.MySQLDriver.api._
When i run this app, i get following error:
[error] /play-scala-starter-example/app/controllers/DbController.scala:11: object jdbc is not a member of package play.api.db.slick
[error] import slick.jdbc.JdbcProfile
[error] ^
[error] /play-scala-starter-example/app/controllers/DbController.scala:12: object driver is not a member of package play.api.db.slick
[error] import slick.driver.MySQLDriver.api._
Looking at slick APIs these are valid package path names.
build.sbt:
name := """play-scala"""
version := "1.0-SNAPSHOT"
lazy val root = (project in file(".")).enablePlugins(PlayScala)
scalaVersion := "2.11.11"
libraryDependencies += jdbc
libraryDependencies += cache
libraryDependencies += ws
libraryDependencies += "org.scalatestplus.play" %% "scalatestplus-play" % "2.0.0" % Test
libraryDependencies += "com.typesafe.play" %% "play-slick" % "2.0.0"
libraryDependencies += "mysql" % "mysql-connector-java" % "5.1.36"
Related
Im really new to this microservice world and was trying to learn from scratch. But for some reason not able to call a simple dependency.
Getting the error
object twitter is not a member of package com import
com.twitter.finagle._
SBT file, Ive tried three ways
Trial 1
name := "microservicestest"
version := "0.1"
scalaVersion := "2.12.15"
libraryDependencies ++= Seq(
"com.github.finagle" %% "finch-core" % "0.31.0",
"com.github.finagle" %% "finch-circe" % "0.31.0",
"io.circe" %% "circe-generic" % "0.9.0"
)
Trial 2 (puttting just the dependency line in here)
libraryDependencies += "com.twitter" %% "finagle-http" % "21.8.0"
Trial 3
libraryDependencies ++= Seq(
"com.github.finagle" %% "finch-core" % "0.15.1"
)
Scala file
import io.finch._
import com.twitter.finagle.Http
import com.twitter.util.Await
object HelloWorld extends App {
val api: Endpoint[String] = get("hello") { Ok("Hello, World!") }
Await.ready(Http.server.serve(":8080", api.toServiceAs[Text.Plain]))
}
SBT file
libraryDependencies += "com.twitter" %% "finagle-http" % "21.8.0"
Working simple code
import com.twitter.finagle.{Http, Service}
import com.twitter.finagle.http
import com.twitter.util.{Await, Future}
object HelloWorld extends App {
val service = new Service[http.Request, http.Response] {
def apply(req: http.Request): Future[http.Response] =
Future.value(http.Response(req.version, http.Status.Ok))
}
val server = Http.serve(":8080", service)
Await.ready(server)
}
I am trying to comile and run simple h2o scala code. But when I do sbt package I get errors.
Am I missing something in the sbt file
This is my h2o scala code
import org.apache.spark.SparkContext
import org.apache.spark.SparkContext._
import org.apache.spark.SparkConf
import org.apache.spark.sql._
import ai.h2o.automl.AutoML
import ai.h2o.automl.AutoMLBuildSpec
import org.apache.spark.h2o._
object H2oScalaEg1 {
def main(args: Array[String]): Unit = {
val sparkConf1 = new SparkConf().setMaster("local[2]").setAppName("H2oScalaEg1App")
val sparkSession1 = SparkSession.builder.config(conf = sparkConf1).getOrCreate()
val h2oContext = H2OContext.getOrCreate(sparkSession1.sparkContext)
import h2oContext._
import java.io.File
import h2oContext.implicits._
import water.Key
}
}
And this is my sbt file.
name := "H2oScalaEg1Name"
version := "1.0"
scalaVersion := "2.11.12"
scalaSource in Compile := baseDirectory.value / ""
libraryDependencies += "org.apache.spark" %% "spark-core" % "2.2.3"
libraryDependencies += "org.apache.spark" %% "spark-sql" % "2.2.0"
libraryDependencies += "org.apache.spark" %% "spark-hive" % "2.2.0"
libraryDependencies += "ai.h2o" % "h2o-core" % "3.22.1.3" % "runtime" pomOnly()
When I do sbt package I get these errors
[error] /home/myuser1/h2oScalaEg1/H2oScalaEg1.scala:7:8: not found: object ai
[error] import ai.h2o.automl.AutoML
[error] ^
[error] /home/myuser1/h2oScalaEg1/H2oScalaEg1.scala:8:8: not found: object ai
[error] import ai.h2o.automl.AutoMLBuildSpec
[error] ^
[error] /home/myuser1/h2oScalaEg1/H2oScalaEg1.scala:10:25: object h2o is not a member of package org.apache.spark
[error] import org.apache.spark.h2o._
[error] ^
[error] /home/myuser1/h2oScalaEg1/H2oScalaEg1.scala:20:20: not found: value H2OContext
[error] val h2oContext = H2OContext.getOrCreate(sparkSession1.sparkContext)
[error] ^
[error] /home/myuser1/h2oScalaEg1/H2oScalaEg1.scala:28:10: not found: value water
[error] import water.Key
[error] ^
[error] 5 errors found
How can I fix this problem.
My spark version in spark-2.2.3-bin-hadoop2.7
Thanks,
marrel
pomOnly() in build.sbt indicates to the dependency management handlers that jar libs/artifacts for this dependency should not be loaded and to only look for the metadata.
Try to use libraryDependencies += "ai.h2o" % "h2o-core" % "3.22.1.3" instead.
Edit 1: Additionally I think you are missing (at least) one library dependency:
libraryDependencies += "ai.h2o" % "h2o-automl" % "3.22.1.3"
see: https://search.maven.org/artifact/ai.h2o/h2o-automl/3.22.1.5/pom
Edit 2:
The last dependency you are missing is sparkling-water-core:
libraryDependencies += "ai.h2o" % "sparkling-water-core_2.11" % "2.4.6" should do the trick.
Here is the github of sparkling-water/core/src/main/scala/org/apache/spark/h2o
.
I'm attempting to create a filter to collect metrics related to request fulfillment time in a Scala Play 2.5 app. I am following this documentation.
It instructs me to create a class that extends DefaultHttpFilters. However, I am unable to import this class! import play.api.http.DefaultHttpFilters is unrecognized. It occurred to me that I may need to make an addition to build.sbt, so I added filters to libraryDependencies in that file, but still no luck. The truly strange thing is that import play.api.http.HttpFilters is recognized. DefaultHttpFilters lives in the same package, and in fact implements the HttpFilters trait, so I'm rather bamboozled by the fact that the import is unrecognized.
Any advice would be greatly appreciated, and please let me know if I can provide any further information to help in diagnosing the issue.
Here is my build.sbt:
name := """REDACTED"""
version := "1.0.0"
lazy val root = (project in file(".")).enablePlugins(PlayScala)
scalaVersion := "2.11.7"
routesGenerator := InjectedRoutesGenerator
resolvers += "scalaz-bintray" at "https://dl.bintray.com/scalaz/releases"
libraryDependencies ++= Seq(
ws,
filters,
"com.typesafe.play" %% "play-slick" % "2.0.0",
"com.h2database" % "h2" % "1.4.187",
"org.scalatestplus.play" %% "scalatestplus-play" % "1.5.0" % "test",
"mysql" % "mysql-connector-java" % "5.1.39",
specs2 % Test
)
unmanagedJars in Compile += file(Path.userHome+"/lib/*.jar")
resolvers += "Sonatype snapshots" at "http://oss.sonatype.org/content/repositories/snapshots/"
fork in run := true
Here is plugins.sbt:
resolvers += "Typesafe repository" at "http://repo.typesafe.com/typesafe/releases/"
addSbtPlugin("com.typesafe.play" % "sbt-plugin" % "2.5.0")
addSbtPlugin("com.jamesward" %% "play-auto-refresh" % "0.0.14")
addSbtPlugin("org.scoverage" % "sbt-scoverage" % "1.3.5")
Filters are defined in the following way
app/filters/AccessLoggingFilter.scala:
import javax.inject.Inject
import akka.stream.Materializer
import play.api.Logger
import play.api.mvc.{Filter, RequestHeader, Result}
import play.api.routing.Router.Tags
import scala.concurrent.Future
class AccessLoggingFilter #Inject() (implicit val mat: Materializer) extends Filter {
def apply(nextFilter: RequestHeader => Future[Result])(requestHeader: RequestHeader): Future[Result] = {
val requestStartTime = System.nanoTime
nextFilter(requestHeader).map { result =>
val requestedAction = requestHeader.tags(Tags.RouteController) + "." + requestHeader.tags(Tags.RouteActionMethod)
val requestFulfillmentTime = System.nanoTime - requestStartTime
Logger.info("Request for " + requestedAction + " resulted in status code " + result.header.status +
" and had request fulfillment time " + requestFulfillmentTime + " nanoseconds")
result.withHeaders("Request-Time" -> requestFulfillmentTime.toString)
}
}
}
And then app/filters/Filters.scala:
package filters
import javax.inject.Inject
class Filters #Inject() (accessLoggingFilter: AccessLoggingFilter) { }
DefaultHttpFilters was only introduced in Play 2.5.4, and you are using Play 2.5.0.
So change your Play version to 2.5.4 at least (the current version at the time of writing is 2.5.6)
// In plugins.sbt
addSbtPlugin("com.typesafe.play" % "sbt-plugin" % "2.5.4")
Then, just reload the project and update your dependencies (activator update)
If you really need to use that version, use HttpFilters instead (same example from "Using filters")
import javax.inject.Inject
import play.api.http.HttpFilters
import play.filters.gzip.GzipFilter
class Filters #Inject() (
gzip: GzipFilter,
log: LoggingFilter
) extends HttpFilters {
val filters = Seq(gzip, log)
}
I'm getting the following error when compiling the following toy class:
package com.example
import scala.tools.reflect.ToolBox
import scala.reflect.runtime.{currentMirror => m}
object Hello {
def main(args: Array[String]): Unit = {
println("Hello, world!")
}
}
[info] Loading project definition from /Users/me/Temp/Bar/project
[info] Set current project to Bar (in build file:/Users/me/Temp/Bar/)
[info] Compiling 1 Scala source to /Users/me/Temp/Bar/target/scala-2.11/classes...
[error] /Users/me/Temp/Bar/src/main/scala/com/example/Hello.scala:3: object tools is not a member of package scala
[error] import scala.tools.reflect.ToolBox
[error] ^
[error] one error found
[error] (compile:compileIncremental) Compilation failed
This is my build.sbt file:
name := """Bar"""
version := "1.0"
scalaVersion := "2.11.8"
// Change this to another test framework if you prefer
libraryDependencies += "org.scalatest" %% "scalatest" % "2.2.4" % "test"
libraryDependencies += "org.scala-lang" % "scala-reflect" % "2.11.8"
// Uncomment to use Akka
//libraryDependencies += "com.typesafe.akka" %% "akka-actor" % "2.3.11"
The following dependency fixed the issue:
libraryDependencies += "org.scala-lang" % "scala-compiler" % "2.11.8"
Is this the best solution?
The ToolBox class is part of the compiler, not the public reflection API.
After run i getting this object mongodb is not a member of package com in Play
I cant resolve that problem. Im trying to do Play Scala MongoDB and from client side Scala.js
my build.sbt is >
lazy val server = (project in file("server")).settings(
scalaVersion := scalaV,
scalaJSProjects := clients,
pipelineStages := Seq(scalaJSProd, gzip),
resolvers += "scalaz-bintray" at "https://dl.bintray.com/scalaz/releases",
libraryDependencies ++= Seq(
"com.vmunier" %% "play-scalajs-scripts" % "0.3.0",
"org.mongodb" %% "casbah" % "3.1.0",
"org.webjars" % "jquery" % "1.11.1",
"com.novus" %% "salat" % "1.9.9",
"se.radley" %% "play-plugins-salat" % "1.5.0",
"commons-codec" % "commons-codec" % "1.6",
specs2 % Test
object code
package model
import com.mongodb.DBObject
import com.mongodb.casbah.MongoConnection
import com.mongodb.casbah.commons.MongoDBObject
/**
* Created by qqQQaAs on 2016-01-04.
*/
object AllBooks {
def toJson() {
val collection = MongoConnection()("books")("books")
val query = "Krakow"
// simply convert the result to a string, separating items with a comma
// this string goes inside an "array", and it's ready to hit the road
val json = "[%s]".format(
collection.find(query).toList.mkString(",")
)
}
Controller
package controllers
import com.mongodb.casbah._
import model.AllBooks
import play.api.mvc._
import shared.SharedMessages
object Application extends Controller {
def index = Action {
Ok(views.html.index(SharedMessages.itWorks))
}
def service() = Action {
val json = AllBooks.toJson()
Ok(json).as("application/json")
}
}
Thanks for help guys
You should import the following pages as per the official documentation:
import org.mongodb.scala._
import org.bson._