I am new to the Scala env and trying to build a test project using play with 'scalikejdbc' for SQL integration. Here is my build.sbt following the documents at http://scalikejdbc.org/documentation/playframework-support.html
name := """run"""
organization := "com.example"
version := "1.0-SNAPSHOT"
lazy val root = (project in file(".")).enablePlugins(PlayScala)
scalaVersion := "2.13.10"
libraryDependencies ++= Seq(
guice,
"org.scalatestplus.play" %% "scalatestplus-play" % "5.0.0" % Test,
"com.h2database" % "h2" % "1.4.200", // your jdbc driver here
"org.scalikejdbc" %% "scalikejdbc" % "4.0.0",
"org.scalikejdbc" %% "scalikejdbc-config" % "4.0.0",
"org.scalikejdbc" %% "scalikejdbc-play-initializer" % "2.8.0-scalikejdbc-3.5",
"com.typesafe.play" %% "play-ws" % "2.3.1"
)
dependencyOverrides += "org.fluentlenium" % "fluentlenium-core" % "0.10.3"
// Adds additional packages into Twirl
//TwirlKeys.templateImports += "com.example.controllers._"
// Adds additional packages into conf/routes
// play.sbt.routes.RoutesKeys.routesImport += "com.example.binders._"
I have also aded the below on plugins.sbt
resolvers += Resolver.url("SBT Plugins", url("https://repo.scala-sbt.org/scalasbt/sbt-plugin-releases/"))(Resolver.ivyStylePatterns)
However while trying to update the application before running i am getting the below issue
[error] (update) found version conflict(s) in library dependencies; some are suspected to be binary incompatible:
[error]
[error] * org.scala-lang.modules:scala-parser-combinators_2.13:2.1.0 (early-semver) is selected over {1.1.2}
[error] +- org.scalikejdbc:scalikejdbc-core_2.13:4.0.0 (depends on 2.1.0)
[error] +- com.typesafe.play:play_2.13:2.8.18 (depends on 1.1.2)
[error] +- com.typesafe:ssl-config-core_2.13:0.4.3 (depends on 1.1.2)
[error]
following are relevant versions :
sbt script version: 1.8.0
play version :2.8.18
Scala code runner version 3.2.1 but using as scalaVersion := "2.13.10" in sbt.
version conflict(s) in library dependencies; some are suspected to be binary incompatible
This means that you have at least two dependencies that are needing a 3rd one but they need 2 different versions which are supposed to be incompatible.
As only one can be included and used for your code, SBT is telling you: "I am going to pick one version but there are risks that this version won't work as you might have code that rely on the other version and this might be incompatible".
You have 2 options:
force a version (for scala-parser-combinators) with dependencyOverrides for instance if you know that actually there's no incompatibility, or at least on the way you use the libraries
upgrade or downgrade the libraries (scalikejdbc or play) so that all libraries depend on the same version of the conflicting one (scala-parser-combinators).
In this case, I would downgrade scalikejdbc because there's no newer play version (as of today)
Related
I have an HTTP Backend with Scala Play. Works fine.
Now I want to set up a gRPC-API on top of it (theoretical this should work).
To set gRPC up I basically followed the akka-quickstart
I can run sbt compile and get my generated Scala classes in the target/../ dic.
But if I try to run sbt run I get
--- (Running the application, auto-reloading is enabled) ---
[warn] a.u.ManifestInfo - You are using version 2.6.5 of Akka, but it appears you (perhaps indirectly) also depend on older versions of related artifacts. You can solve this by adding an explicit dependency on version 2.6.5 of the [akka-discovery] artifacts to your project. See also: https://doc.akka.io/docs/akka/current/common/binary-compatibility-rules.html#mixed-versioning-is-not-allowed
[error] java.lang.IllegalStateException: You are using version 2.6.5 of Akka, but it appears you (perhaps indirectly) also depend on older versions of related artifacts. You can solve this by adding an explicit dependency on version 2.6.5 of the [akka-discovery] artifacts to your project. See also: https://doc.akka.io/docs/akka/current/common/binary-compatibility-rules.html#mixed-versioning-is-not-allowed
So I understand that some libs I use, are too old for Akka 2.6.5 but i don't understand how to set my service on a lower Akka version.
My plugins.sbt
addSbtPlugin("com.typesafe.play" % "sbt-plugin" % "2.8.2")
addSbtPlugin("org.foundweekends.giter8" % "sbt-giter8-scaffold" % "0.11.0")
addSbtPlugin("com.lightbend.akka.grpc" % "sbt-akka-grpc" % "1.0.0-M1")
resolvers += Resolver.bintrayRepo("playframework", "maven")
libraryDependencies += "com.lightbend.play" %% "play-grpc-generators" % "0.8.2"
my build.sbt
name := "smartmarkt"
version := "1.0-SNAPSHOT"
scalaVersion := "2.13.2"
lazy val root = (project in file("."))
.enablePlugins(PlayScala, PlayAkkaHttp2Support, AkkaGrpcPlugin)
import play.grpc.gen.scaladsl.PlayScalaServerCodeGenerator
akkaGrpcExtraGenerators += PlayScalaServerCodeGenerator
libraryDependencies += "com.lightbend.play" %% "play-grpc-runtime" % "0.8.2"
libraryDependencies += guice
libraryDependencies += "org.scalatestplus.play" %% "scalatestplus-play" % "5.0.0" % Test
Looking at your direct dependencies:
"com.lightbend.play" %% "play-grpc-runtime" % "0.8.2" depends on akka-discovery 2.6.4.
You are using Play 2.8.2 which depends on Akka version 2.6.5.
Just add the depencency on akka-discovery 2.6.5 to your dependencies:
libraryDependencies += "com.typesafe.akka" %% "akka-discovery" % "2.6.5"
I have installed Flink, Scala and sbt
Flink Version: 1.9.1
Scala Version: 2.10.6
Sbt Version: 1.3.7
I made relevant changes in build.sbt.
Compile command is failing
Here is the relevant information.
Any information is greatly appreciated
**Versions Information
[osboxes#osboxes local]$ scala -version
Scala code runner version 2.10.6 -- Copyright 2002-2013, LAMP/EPFL
[osboxes#osboxes local]$ flink --version
Version: 1.9.1, Commit ID: 4d56de8
[osboxes#osboxes readcsvfile]$ sbt -version
sbt version in this project: 1.3.7
sbt script version: 1.3.7
** build.sbt changes
val flinkVersion = "1.9.1"
val flinkDependencies = Seq(
"org.apache.flink" %% "flink-scala" % flinkVersion % "provided",
"org.apache.flink" %% "flink-streaming-scala" % flinkVersion % "provided")
** Compile Errors
sbt:readCsvfile> compile
[info] Updating
[info] Resolved dependencies
[warn]
[warn] Note: Unresolved dependencies path:
[error] stack trace is suppressed; run last update for the full output
[error] (update) sbt.librarymanagement.ResolveException: Error downloading org.apache.flink:flink-streaming-scala_2.13:1.9.1
[error] Not found
[error] Not found
[error] not found: /home/osboxes/.ivy2/local/org.apache.flink/flink-streaming-scala_2.13/1.9.1/ivys/ivy.xml
[error] not found: https://repo1.maven.org/maven2/org/apache/flink/flink-streaming-scala_2.13/1.9.1/flink-streaming-scala_2.13-1.9.1.pom
[error] Error downloading org.apache.flink:flink-scala_2.13:1.9.1
[error] Not found
[error] Not found
[error] not found: /home/osboxes/.ivy2/local/org.apache.flink/flink-scala_2.13/1.9.1/ivys/ivy.xml
[error] not found: https://repo1.maven.org/maven2/org/apache/flink/flink-scala_2.13/1.9.1/flink-scala_2.13-1.9.1.pom
[error] Total time: 4 s, completed Jan 30, 2020 3:59:12 PM
sbt:readCsvfile>
Few points I want to mention here regarding the SBT dependencies issues are:
Please add scalaVersion := "2.12.11" in build.sbt file like this, which includes the Scala version in your SBT dependencies automatically due to this%%.
name := "flink-streaming-demo"
scalaVersion := "2.12.11"
val flinkVersion = "1.10.0"
libraryDependencies += "org.apache.flink" %% "flink-scala" % flinkVersion % "provided"
libraryDependencies += "org.apache.flink" %% "flink-streaming-scala" % flinkVersion % "provided"
If you want Scala version specific SBT dependencies then use % like this:
libraryDependencies += "org.apache.flink" % "flink-scala_2.12" % flinkVersion % "provided"
libraryDependencies += "org.apache.flink" % "flink-streaming-scala_2.12" % flinkVersion % "provided"
In worst case if all these does not work then simply delete or rename these existing .sbt and .ivy2 hidden folder in your system home directory, where your all dependecies and plugins get sotred after downloading from maven central and then refresh/build the SBT project.
SBT dependency format
libraryDependencies += groupID % artifactID % revision % configuration
Meaning of % and %%
%: A method used to construct an Ivy Module ID from the strings you supply.
%%: When used after the groupID, it automatically adds your project’s Scala version (such as _2.12) to the end of the artifact name.
NOTE: To get more details click here.
summing up the comments since perhaps it is a bit hard to know what you should do
In general, if you get an "Unresolved dependencies" error, look at mvnrepository.com, search for your artifact:
https://mvnrepository.com/artifact/org.apache.flink/flink-scala
This tells you (second column) which Scala versions are supported by it. In this case, the library is available for 2.11.x and 2.12.x.
Thus, you have to use a Scala version compatible with that in your build, in build.sbt:
ThisBuild / scalaVersion := "2.12.10"
I'm trying to use log4j2 in scala.
Below is my build.sbt
name := "trial"
version := "0.1"
scalaVersion := "2.13.1"
libraryDependencies += "org.apache.logging.log4j" %% "log4j-api" % "2.12.1"
libraryDependencies += "org.apache.logging.log4j" %% "log4j-core" % "2.12.1"
libraryDependencies += "org.apache.logging.log4j" %% "log4j-api-scala" % "2.12.1"
How to resolve these errors:
[warn] Note: Unresolved dependencies path:
[error] sbt.librarymanagement.ResolveException: Error downloading org.apache.logging.log4j:log4j-api_2.13:2.12.1
sbt.librarymanagement.ResolveException: Error downloading org.apache.logging.log4j:log4j-api_2.13:2.12.1
not found: /Users/username/.ivy2/local/org.apache.logging.log4j/log4j-api_2.13/2.12.1/ivys/ivy.xml
Note :
There is no directory /Users/username/.ivy2/local/
but I can see there is /Users/username/.ivy2/cache/
and plugins log4j-api,core,api-scala are present in cache.
The IDE i'm using is IntelliJ IDEA.
There are multiple problems
You are using Scala 2.13 however the latest build of log4j-api-scala is for Scala 2.12.
The latest version of log4j-api-scala is 11.0 not 2.12.1
log4j-api and log4j-core are Java libraries so we should use single % instead of double%%
Disclaimer: new sbt/Scala user
So I have the following build.sbt file (sbt.version=1.1.1):
val managedLibs : Setting[_] = libraryDependencies ++= Seq(
"org.scala-lang" % "scala-compiler" % "2.11.10" withSources(),
"org.scala-lang" % "scala-library" % "2.11.10" withSources(),
"org.scala-lang" % "scala-reflect" % "2.11.10" withSources()
)
lazy val root = (project in file("."))
.settings(
name := "foo",
organization := "bar",
scalaVersion := "2.12.4",
sourcesInBase := false,
version := "0.1",
managedLibs
)
What I want to do is to use a different compiler version to build my project and a different compiler version from within my project (i.e., as a library). Sbt does not seem to like this and I am getting the following warnings:
[warn] Binary version (2.11) for dependency org.scala-lang#scala-compiler;2.11.10
[warn] in bar#foo_2.12;0.1 differs from Scala binary version in project (2.12).
[warn] Binary version (2.11) for dependency org.scala-lang#scala-library;2.11.10
[warn] in bar#foo_2.12;0.1 differs from Scala binary version in project (2.12).
[warn] Binary version (2.11) for dependency org.scala-lang#scala-reflect;2.11.10
[warn] in bar#foo_2.12;0.1 differs from Scala binary version in project (2.12).
[warn] Multiple dependencies with the same organization/name but different versions. To avoid conflict, pick one version:
[warn] * org.scala-lang:scala-library:(2.12.4, 2.11.10)
My program compiles and runs without an issue using scala 2.12.4 (it looks like sbt ignored 2.11.10) but I am just curious: is it even possible to use different versions in that way ? Is this a hard restriction imposed by sbt ?
Thanks in advance for your help !
Because I had some dependency issues, I decided to upgrade the Scala installation on my computer to version 2.12.0-M3. I also ran sbt -v, after which many packages were downloaded.
However, when I try to refresh the following build.sbt file
name := """ScalaWeb"""
version := "1.0-SNAPSHOT"
lazy val root = (project in file(".")).enablePlugins(PlayScala)
scalaVersion := "2.12.0-M3"
libraryDependencies ++= Seq(
jdbc,
cache,
ws,
specs2 % Test,
"org.sorm-framework" % "sorm" % "0.3.18"
)
resolvers += "scalaz-bintray" at "http://dl.bintray.com/scalaz/releases"
// Play provides two styles of routers, one expects its actions to be injected, the
// other, legacy style, accesses its actions statically.
routesGenerator := InjectedRoutesGenerator
scalacOptions += "-Ylog-classpath"
I get the following errors:
Error:Unresolved dependencies:
com.typesafe.play#twirl-api_2.12.0-M3;1.1.1: not found
com.typesafe.play#play-server_2.12.0-M3;2.4.6: not found
com.typesafe.play#play-netty-server_2.12.0-M3;2.4.6: not found
com.typesafe.play#play-jdbc_2.12.0-M3;2.4.6: not found
com.typesafe.play#play-cache_2.12.0-M3;2.4.6: not found
com.typesafe.play#play-ws_2.12.0-M3;2.4.6: not found
com.typesafe.play#play-test_2.12.0-M3;2.4.6: not found
com.typesafe.play#play-specs2_2.12.0-M3;2.4.6: not found
com.typesafe.play#play-omnidoc_2.12.0-M3;2.4.6: not found
Version 2-12.0-M3 appeared in October 2015. It seems doubtful that all these packages are still incompatible.
How can I solve this issue?
PS
I was unable to use scala version 2.11.7 because I have the dependency
"org.sorm-framework" % "sorm" % "0.3.18"
Which, because of its dependencies, produces this issues:
[error] org.scala-lang.modules:scala-xml _2.11, _2.12.0-M3
[error] org.scala-lang.modules:scala-parser-combinators _2.11, _2.12.0-M3
It seems the SORMS author is defining Scala library dependencies wrongly. As a result you have horrible transitive Scala dependencies for versions like [2.10,2.12), so it will pick whatever latest Scala version was published, including in your case 2.12.0-M3 apparently.
Looking at the POM of 0.3.18 and the POM of 0.3.19, it seems that the later version uses (still wrong!!) [2.10,2.11.999).
So I think you can solve your issue using these settings:
scalaVersion := "2.11.7"
libraryDependencies += "org.sorm-framework" % "sorm" % "0.3.19"
If not, you will have to exclude the problematic transitive dependencies from SORM.
Update: The bug report also hints that the dependency you need to exclude is actually embrace. For example, using the sbt-dependency-graph plugin, running sbt dependency-dot and inspecting the result I find:
"com.github.nikita-volkov:embrace:0.1.4" -> "org.scala-lang:scala-compiler:2.12.0-M3"
which seems to be the origin of the evil.
Instead of excluding, I am now forcing a version of Scala:
scalaVersion := "2.11.7"
libraryDependencies ++= Seq(
"org.sorm-framework" % "sorm" % "0.3.19",
"org.scala-lang" % "scala-compiler" % scalaVersion.value force() // !!
)
This worked for me.