Lagom Scala HelloWorld project

Get started with Lagom using Scala
https://www.lagomframework.com/get-started-scala.html

Create project and add it to GitHub
https://developer.lightbend.com/start/?group=lagom&project=lagom-scala-sbt

Lagom Scala project

[dave@localhost github]$ cp ~/Downloads/lagom-scala-sbt.zip .
[dave@localhost github]$ unzip -l lagom-scala-sbt.zip 
Archive:  lagom-scala-sbt.zip
  Length      Date    Time    Name
---------  ---------- -----   ----
        0  02-16-2018 22:19   lagom-scala-sbt/
        0  02-16-2018 22:19   lagom-scala-sbt/dave-scala-lagom-api/
        0  02-16-2018 22:19   lagom-scala-sbt/dave-scala-lagom-api/src/
        0  02-16-2018 22:19   lagom-scala-sbt/dave-scala-lagom-api/src/main/
        0  02-16-2018 22:19   lagom-scala-sbt/dave-scala-lagom-api/src/main/scala/
        0  02-16-2018 22:19   lagom-scala-sbt/dave-scala-lagom-api/src/main/scala/com/
        0  02-16-2018 22:19   lagom-scala-sbt/dave-scala-lagom-api/src/main/scala/com/example/
        0  02-16-2018 22:19   lagom-scala-sbt/dave-scala-lagom-api/src/main/scala/com/example/hello/
        0  02-16-2018 22:19   lagom-scala-sbt/dave-scala-lagom-api/src/main/scala/com/example/hello/api/
     2864  02-16-2018 22:19   lagom-scala-sbt/dave-scala-lagom-api/src/main/scala/com/example/hello/api/DavescalalagomService.scala
        0  02-16-2018 22:19   lagom-scala-sbt/dave-scala-lagom-stream-impl/
        0  02-16-2018 22:19   lagom-scala-sbt/dave-scala-lagom-stream-impl/src/
        0  02-16-2018 22:19   lagom-scala-sbt/dave-scala-lagom-stream-impl/src/main/
        0  02-16-2018 22:19   lagom-scala-sbt/dave-scala-lagom-stream-impl/src/main/scala/
        0  02-16-2018 22:19   lagom-scala-sbt/dave-scala-lagom-stream-impl/src/main/scala/com/
        0  02-16-2018 22:19   lagom-scala-sbt/dave-scala-lagom-stream-impl/src/main/scala/com/example/
        0  02-16-2018 22:19   lagom-scala-sbt/dave-scala-lagom-stream-impl/src/main/scala/com/example/hellostream/
        0  02-16-2018 22:19   lagom-scala-sbt/dave-scala-lagom-stream-impl/src/main/scala/com/example/hellostream/impl/
     1345  02-16-2018 22:19   lagom-scala-sbt/dave-scala-lagom-stream-impl/src/main/scala/com/example/hellostream/impl/DavescalalagomStreamLoader.scala
      551  02-16-2018 22:19   lagom-scala-sbt/dave-scala-lagom-stream-impl/src/main/scala/com/example/hellostream/impl/DavescalalagomStreamServiceImpl.scala
        0  02-16-2018 22:19   lagom-scala-sbt/dave-scala-lagom-stream-impl/src/main/resources/
      685  02-16-2018 22:19   lagom-scala-sbt/dave-scala-lagom-stream-impl/src/main/resources/application.conf
        0  02-16-2018 22:19   lagom-scala-sbt/dave-scala-lagom-stream-api/
        0  02-16-2018 22:19   lagom-scala-sbt/dave-scala-lagom-stream-api/src/
        0  02-16-2018 22:19   lagom-scala-sbt/dave-scala-lagom-stream-api/src/main/
        0  02-16-2018 22:19   lagom-scala-sbt/dave-scala-lagom-stream-api/src/main/scala/
        0  02-16-2018 22:19   lagom-scala-sbt/dave-scala-lagom-stream-api/src/main/scala/com/
        0  02-16-2018 22:19   lagom-scala-sbt/dave-scala-lagom-stream-api/src/main/scala/com/example/
        0  02-16-2018 22:19   lagom-scala-sbt/dave-scala-lagom-stream-api/src/main/scala/com/example/hellostream/
        0  02-16-2018 22:19   lagom-scala-sbt/dave-scala-lagom-stream-api/src/main/scala/com/example/hellostream/api/
      648  02-16-2018 22:19   lagom-scala-sbt/dave-scala-lagom-stream-api/src/main/scala/com/example/hellostream/api/DavescalalagomStreamService.scala
       61  02-16-2018 22:19   lagom-scala-sbt/.sbtopts
        0  02-16-2018 22:19   lagom-scala-sbt/dave-scala-lagom-impl/
        0  02-16-2018 22:19   lagom-scala-sbt/dave-scala-lagom-impl/src/
        0  02-16-2018 22:19   lagom-scala-sbt/dave-scala-lagom-impl/src/main/
        0  02-16-2018 22:19   lagom-scala-sbt/dave-scala-lagom-impl/src/main/scala/
        0  02-16-2018 22:19   lagom-scala-sbt/dave-scala-lagom-impl/src/main/scala/com/
        0  02-16-2018 22:19   lagom-scala-sbt/dave-scala-lagom-impl/src/main/scala/com/example/
        0  02-16-2018 22:19   lagom-scala-sbt/dave-scala-lagom-impl/src/main/scala/com/example/hello/
        0  02-16-2018 22:19   lagom-scala-sbt/dave-scala-lagom-impl/src/main/scala/com/example/hello/impl/
     1642  02-16-2018 22:19   lagom-scala-sbt/dave-scala-lagom-impl/src/main/scala/com/example/hello/impl/DavescalalagomServiceImpl.scala
     1648  02-16-2018 22:19   lagom-scala-sbt/dave-scala-lagom-impl/src/main/scala/com/example/hello/impl/DavescalalagomLoader.scala
     7007  02-16-2018 22:19   lagom-scala-sbt/dave-scala-lagom-impl/src/main/scala/com/example/hello/impl/DavescalalagomEntity.scala
        0  02-16-2018 22:19   lagom-scala-sbt/dave-scala-lagom-impl/src/main/resources/
      965  02-16-2018 22:19   lagom-scala-sbt/dave-scala-lagom-impl/src/main/resources/application.conf
        0  02-16-2018 22:19   lagom-scala-sbt/dave-scala-lagom-impl/src/test/
        0  02-16-2018 22:19   lagom-scala-sbt/dave-scala-lagom-impl/src/test/scala/
        0  02-16-2018 22:19   lagom-scala-sbt/dave-scala-lagom-impl/src/test/scala/com/
        0  02-16-2018 22:19   lagom-scala-sbt/dave-scala-lagom-impl/src/test/scala/com/example/
        0  02-16-2018 22:19   lagom-scala-sbt/dave-scala-lagom-impl/src/test/scala/com/example/hello/
        0  02-16-2018 22:19   lagom-scala-sbt/dave-scala-lagom-impl/src/test/scala/com/example/hello/impl/
     1461  02-16-2018 22:19   lagom-scala-sbt/dave-scala-lagom-impl/src/test/scala/com/example/hello/impl/DavescalalagomEntitySpec.scala
     1071  02-16-2018 22:19   lagom-scala-sbt/dave-scala-lagom-impl/src/test/scala/com/example/hello/impl/DavescalalagomServiceSpec.scala
        0  02-16-2018 22:19   lagom-scala-sbt/dave-scala-lagom-impl/src/test/resources/
      501  02-16-2018 22:19   lagom-scala-sbt/dave-scala-lagom-impl/src/test/resources/logback.xml
        0  02-16-2018 22:19   lagom-scala-sbt/project/
       20  02-16-2018 22:19   lagom-scala-sbt/project/build.properties
      208  02-16-2018 22:19   lagom-scala-sbt/project/plugins.sbt
      118  02-16-2018 22:19   lagom-scala-sbt/.gitignore
      595  02-16-2018 22:19   lagom-scala-sbt/LICENSE
     1514  02-16-2018 22:19   lagom-scala-sbt/build.sbt
      204  02-16-2018 22:19   lagom-scala-sbt/README.md
        0  02-16-2018 22:19   lagom-scala-sbt//
       55  01-15-2018 18:59   lagom-scala-sbt/sbt.bat
       44  01-15-2018 18:59   lagom-scala-sbt/sbt
        0  02-16-2018 22:19   lagom-scala-sbt/sbt-dist/
        0  02-16-2018 22:19   lagom-scala-sbt/sbt-dist/bin/
     6751  01-15-2018 18:59   lagom-scala-sbt/sbt-dist/bin/sbt-launch-lib.bash
     1321  01-15-2018 18:59   lagom-scala-sbt/sbt-dist/bin/sbt.bat
     5062  01-15-2018 18:59   lagom-scala-sbt/sbt-dist/bin/sbt
  1210231  01-15-2018 18:59   lagom-scala-sbt/sbt-dist/bin/sbt-launch.jar
        0  02-16-2018 22:19   lagom-scala-sbt/sbt-dist/conf/
      147  01-15-2018 18:59   lagom-scala-sbt/sbt-dist/conf/sbtconfig.txt
      939  01-15-2018 18:59   lagom-scala-sbt/sbt-dist/conf/sbtopts
---------                     -------
  1247658                     74 files

Add into GitHub
https://help.github.com/articles/adding-an-existing-project-to-github-using-the-command-line/

 Generated project
https://github.com/dveselka/lagom-scala-sbt


Build project

[dave@localhost lagom-scala-sbt]$ ./sbt runAll
Getting org.scala-sbt sbt 0.13.16 ...

Check the running service using

http://localhost:9000/api/hello/World

Scala - setup environment - sbt, Scala IDE

Download sbt http://www.scala-sbt.org/download.html


Configure https proxy

 export JAVA_OPTS="$JAVA_OPTS -Dhttp.proxyHost=webproxy -Dhttp.proxyPort=8080"  

Change sbt repository root

 export _JAVA_OPTIONS='-Duser.home=/d/vesedan/sbt-repository'  

Start sbt

 $ sbt  
 Getting org.scala-sbt sbt 0.13.11 ...  
 downloading https://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/sbt/0.13.11/jars/sbt.jar ...  
     [SUCCESSFUL ] org.scala-sbt#sbt;0.13.11!sbt.jar (2209ms)  
 downloading https://repo1.maven.org/maven2/org/scala-lang/scala-library/2.10.6/scala-library-2.10.6.jar ...  
     [SUCCESSFUL ] org.scala-lang#scala-library;2.10.6!scala-library.jar (36565ms)  
 downloading https://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/main/0.13.11/jars/main.jar ...  
     [SUCCESSFUL ] org.scala-sbt#main;0.13.11!main.jar (14438ms)  
 downloading https://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/compiler-interface/0.13.11/jars/compiler-interface.jar ...  
     [SUCCESSFUL ] org.scala-sbt#compiler-interface;0.13.11!compiler-interface.jar (3732ms)  
 downloading https://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/actions/0.13.11/jars/actions.jar ...  
     [SUCCESSFUL ] org.scala-sbt#actions;0.13.11!actions.jar (4983ms)  
 downloading https://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/main-settings/0.13.11/jars/main-settings.jar ...  
     [SUCCESSFUL ] org.scala-sbt#main-settings;0.13.11!main-settings.jar (189535ms)  
 downloading https://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/interface/0.13.11/jars/interface.jar ...  
     [SUCCESSFUL ] org.scala-sbt#interface;0.13.11!interface.jar (2385ms)  
 downloading https://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/io/0.13.11/jars/io.jar ...  
     [SUCCESSFUL ] org.scala-sbt#io;0.13.11!io.jar (3836ms)  
 downloading https://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/ivy/0.13.11/jars/ivy.jar ...  
     [SUCCESSFUL ] org.scala-sbt#ivy;0.13.11!ivy.jar (10631ms)  
 downloading https://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/logging/0.13.11/jars/logging.jar ...  
     [SUCCESSFUL ] org.scala-sbt#logging;0.13.11!logging.jar (2493ms)  
 downloading https://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/logic/0.13.11/jars/logic.jar ...  
     [SUCCESSFUL ] org.scala-sbt#logic;0.13.11!logic.jar (2893ms)  
 downloading https://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/process/0.13.11/jars/process.jar ...  
     [SUCCESSFUL ] org.scala-sbt#process;0.13.11!process.jar (3226ms)  
 downloading https://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/run/0.13.11/jars/run.jar ...  
     [SUCCESSFUL ] org.scala-sbt#run;0.13.11!run.jar (4793ms)  
 downloading https://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/command/0.13.11/jars/command.jar ...  
     [SUCCESSFUL ] org.scala-sbt#command;0.13.11!command.jar (3569ms)  
 downloading https://repo1.maven.org/maven2/org/scala-sbt/launcher-interface/1.0.0-M1/launcher-interface-1.0.0-M1.jar ...  
     [SUCCESSFUL ] org.scala-sbt#launcher-interface;1.0.0-M1!launcher-interface.jar (265ms)  
 downloading https://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/classpath/0.13.11/jars/classpath.jar ...  
     [SUCCESSFUL ] org.scala-sbt#classpath;0.13.11!classpath.jar (2508ms)  
 downloading https://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/completion/0.13.11/jars/completion.jar ...  
     [SUCCESSFUL ] org.scala-sbt#completion;0.13.11!completion.jar (4228ms)  
 downloading https://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/api/0.13.11/jars/api.jar ...  
     [SUCCESSFUL ] org.scala-sbt#api;0.13.11!api.jar (6932ms)  
 downloading https://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/compiler-integration/0.13.11/jars/compiler-integration.jar ...  
     [SUCCESSFUL ] org.scala-sbt#compiler-integration;0.13.11!compiler-integration.jar (2715ms)  
 downloading https://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/compiler-ivy-integration/0.13.11/jars/compiler-ivy-integration.jar ...  
     [SUCCESSFUL ] org.scala-sbt#compiler-ivy-integration;0.13.11!compiler-ivy-integration.jar (2659ms)  
 downloading https://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/relation/0.13.11/jars/relation.jar ...  
     [SUCCESSFUL ] org.scala-sbt#relation;0.13.11!relation.jar (2618ms)  
 downloading https://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/task-system/0.13.11/jars/task-system.jar ...  
     [SUCCESSFUL ] org.scala-sbt#task-system;0.13.11!task-system.jar (2604ms)  
 downloading https://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/tasks/0.13.11/jars/tasks.jar ...  
     [SUCCESSFUL ] org.scala-sbt#tasks;0.13.11!tasks.jar (3010ms)  
 downloading https://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/tracking/0.13.11/jars/tracking.jar ...  
     [SUCCESSFUL ] org.scala-sbt#tracking;0.13.11!tracking.jar (2193ms)  
 downloading https://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/testing/0.13.11/jars/testing.jar ...  
     [SUCCESSFUL ] org.scala-sbt#testing;0.13.11!testing.jar (3076ms)  
 downloading https://repo1.maven.org/maven2/org/scala-lang/scala-compiler/2.10.6/scala-compiler-2.10.6.jar ...  
     [SUCCESSFUL ] org.scala-lang#scala-compiler;2.10.6!scala-compiler.jar (100258ms)  
 downloading https://repo1.maven.org/maven2/org/scala-lang/scala-reflect/2.10.6/scala-reflect-2.10.6.jar ...  
     [SUCCESSFUL ] org.scala-lang#scala-reflect;2.10.6!scala-reflect.jar (10966ms)  
 downloading https://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/control/0.13.11/jars/control.jar ...  
     [SUCCESSFUL ] org.scala-sbt#control;0.13.11!control.jar (2203ms)  
 downloading https://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/collections/0.13.11/jars/collections.jar ...  
     [SUCCESSFUL ] org.scala-sbt#collections;0.13.11!collections.jar (4384ms)  
 downloading https://repo1.maven.org/maven2/jline/jline/2.13/jline-2.13.jar ...  
     [SUCCESSFUL ] jline#jline;2.13!jline.jar (1690ms)  
 downloading https://repo1.maven.org/maven2/org/fusesource/jansi/jansi/1.11/jansi-1.11.jar ...  
     [SUCCESSFUL ] org.fusesource.jansi#jansi;1.11!jansi.jar (1058ms)  
 downloading https://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/classfile/0.13.11/jars/classfile.jar ...  
     [SUCCESSFUL ] org.scala-sbt#classfile;0.13.11!classfile.jar (2419ms)  
 downloading https://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/incremental-compiler/0.13.11/jars/incremental-compiler.jar ...  
     [SUCCESSFUL ] org.scala-sbt#incremental-compiler;0.13.11!incremental-compiler.jar (4280ms)  
 downloading https://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/compile/0.13.11/jars/compile.jar ...  
     [SUCCESSFUL ] org.scala-sbt#compile;0.13.11!compile.jar (3685ms)  
 downloading https://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/persist/0.13.11/jars/persist.jar ...  
     [SUCCESSFUL ] org.scala-sbt#persist;0.13.11!persist.jar (2781ms)  
 downloading https://repo.typesafe.com/typesafe/ivy-releases/org.scala-tools.sbinary/sbinary_2.10/0.4.2/jars/sbinary_2.10.jar ...  
     [SUCCESSFUL ] org.scala-tools.sbinary#sbinary_2.10;0.4.2!sbinary_2.10.jar (2939ms)  
 downloading https://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/cross/0.13.11/jars/cross.jar ...  
     [SUCCESSFUL ] org.scala-sbt#cross;0.13.11!cross.jar (2050ms)  
 downloading https://repo1.maven.org/maven2/org/scala-sbt/ivy/ivy/2.3.0-sbt-2cc8d2761242b072cedb0a04cb39435c4fa24f9a/ivy-2.3.0-sbt-2cc8d2761242b072cedb0a04cb39435c4fa24f9a.jar ...  
     [SUCCESSFUL ] org.scala-sbt.ivy#ivy;2.3.0-sbt-2cc8d2761242b072cedb0a04cb39435c4fa24f9a!ivy.jar (5077ms)  
 downloading https://repo1.maven.org/maven2/com/jcraft/jsch/0.1.46/jsch-0.1.46.jar ...  
     [SUCCESSFUL ] com.jcraft#jsch;0.1.46!jsch.jar (1399ms)  
 downloading https://repo1.maven.org/maven2/org/scala-sbt/serialization_2.10/0.1.2/serialization_2.10-0.1.2.jar ...  
     [SUCCESSFUL ] org.scala-sbt#serialization_2.10;0.1.2!serialization_2.10.jar (2002ms)  
 downloading https://repo1.maven.org/maven2/org/scala-lang/modules/scala-pickling_2.10/0.10.1/scala-pickling_2.10-0.10.1.jar ...  
     [SUCCESSFUL ] org.scala-lang.modules#scala-pickling_2.10;0.10.1!scala-pickling_2.10.jar (2997ms)  
 downloading https://repo1.maven.org/maven2/org/json4s/json4s-core_2.10/3.2.10/json4s-core_2.10-3.2.10.jar ...  
     [SUCCESSFUL ] org.json4s#json4s-core_2.10;3.2.10!json4s-core_2.10.jar (2953ms)  
 downloading https://repo1.maven.org/maven2/org/spire-math/jawn-parser_2.10/0.6.0/jawn-parser_2.10-0.6.0.jar ...  
     [SUCCESSFUL ] org.spire-math#jawn-parser_2.10;0.6.0!jawn-parser_2.10.jar (699ms)  
 downloading https://repo1.maven.org/maven2/org/spire-math/json4s-support_2.10/0.6.0/json4s-support_2.10-0.6.0.jar ...  
     [SUCCESSFUL ] org.spire-math#json4s-support_2.10;0.6.0!json4s-support_2.10.jar (122ms)  
 downloading https://repo1.maven.org/maven2/org/scalamacros/quasiquotes_2.10/2.0.1/quasiquotes_2.10-2.0.1.jar ...  
     [SUCCESSFUL ] org.scalamacros#quasiquotes_2.10;2.0.1!quasiquotes_2.10.jar (2490ms)  
 downloading https://repo1.maven.org/maven2/org/json4s/json4s-ast_2.10/3.2.10/json4s-ast_2.10-3.2.10.jar ...  
     [SUCCESSFUL ] org.json4s#json4s-ast_2.10;3.2.10!json4s-ast_2.10.jar (774ms)  
 downloading https://repo1.maven.org/maven2/com/thoughtworks/paranamer/paranamer/2.6/paranamer-2.6.jar ...  
     [SUCCESSFUL ] com.thoughtworks.paranamer#paranamer;2.6!paranamer.jar (764ms)  
 downloading https://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/cache/0.13.11/jars/cache.jar ...  
     [SUCCESSFUL ] org.scala-sbt#cache;0.13.11!cache.jar (2837ms)  
 downloading https://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/test-agent/0.13.11/jars/test-agent.jar ...  
     [SUCCESSFUL ] org.scala-sbt#test-agent;0.13.11!test-agent.jar (2668ms)  
 downloading https://repo1.maven.org/maven2/org/scala-sbt/test-interface/1.0/test-interface-1.0.jar ...  
     [SUCCESSFUL ] org.scala-sbt#test-interface;1.0!test-interface.jar (634ms)  
 downloading https://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/apply-macro/0.13.11/jars/apply-macro.jar ...  
     [SUCCESSFUL ] org.scala-sbt#apply-macro;0.13.11!apply-macro.jar (2501ms)  
 :: retrieving :: org.scala-sbt#boot-app  
     confs: [default]  
     49 artifacts copied, 0 already retrieved (17330kB/137ms)  
 Getting Scala 2.10.6 (for sbt)...  
 downloading https://repo1.maven.org/maven2/org/scala-lang/jline/2.10.6/jline-2.10.6.jar ...  
     [SUCCESSFUL ] org.scala-lang#jline;2.10.6!jline.jar (1016ms)  
 downloading https://repo1.maven.org/maven2/org/fusesource/jansi/jansi/1.4/jansi-1.4.jar ...  
     [SUCCESSFUL ] org.fusesource.jansi#jansi;1.4!jansi.jar (1034ms)  
 :: retrieving :: org.scala-sbt#boot-scala  
     confs: [default]  
     5 artifacts copied, 0 already retrieved (24494kB/62ms)  
 [info] Set current project to sbt (in build file:/D:/vesedan/sbt/)  

Start Scala console

 > console  
 [info] Updating {file:/D:/vesedan/sbt/}sbt...  
 [info] Resolving org.fusesource.jansi#jansi;1.4 ...  
 [info] Done updating.  
 [info] 'compiler-interface' not yet compiled for Scala 2.10.6. Compiling...  
 [info]  Compilation completed in 16.541 s  
 [info] Starting scala interpreter...  
 [info]  
 Welcome to Scala version 2.10.6 (Java HotSpot(TM) 64-Bit Server VM, Java 1.8.0_74).  
 Type in expressions to have them evaluated.  
 Type :help for more information.  
 scala>  
 scala>  
 scala> println("Hi!")  
 Hi!
 scala>  

Download  Scala IDE
 http://scala-ide.org/download/sdk.html

Create new Scala Maven project for Eclipse

Scala with Maven tutorial
http://docs.scala-lang.org/tutorials/scala-with-maven.html

Download latest version of Scala http://www.scala-lang.org/download/2.11.7.html

Upgrade Scala version

[root@localhost Downloads]# dnf  upgrade  scala-2.11.7.rpm

Create Scala Maven project from archetype using

   mvn archetype:generate

Choose a number or apply filter (format: [groupId:]artifactId, case sensitive contains): 686: scala
Choose archetype:
1: remote -> co.cask.cdap:cdap-spark-scala-archetype (-)
2: remote -> com.github.igor-petruk.archetypes:maven-archetype-scala-executable (Creates executable Scala Project that is ready to run with 'java -jar')
3: remote -> de.schlichtherle:javafx-scala-demo (An archetype for a standalone JavaFX 2.0 application written in Scala.
The generated application is translated from the Colorful Circles demo from the
JavaFX 2.0 SDK.)
4: remote -> eu.stratosphere:quickstart-scala (-)
5: remote -> net.alchim31.maven:scala-archetype-simple (The maven-scala-plugin is used for compiling/testing/running/documenting scala code in maven.)
6: remote -> net.ladstatt:scala-javafx-archetype (The Scala JavaFX Archetype provides a simple template for a scala based 
    JavaFX project)
7: remote -> org.apache.camel.archetypes:camel-archetype-component-scala (Creates a new Camel component with Scala.)
8: remote -> org.apache.camel.archetypes:camel-archetype-scala (Creates a new Camel project using Scala DSL.)
9: remote -> org.apache.flink:flink-quickstart-scala (-)
10: remote -> org.fusesource.scalate.tooling:scalate-archetype-empty (An archetype which creates an empty Scalate web application)
11: remote -> org.fusesource.scalate.tooling:scalate-archetype-guice (An archetype which creates an empty Scalate Guice web application)
12: remote -> org.fusesource.scalate.tooling:scalate-archetype-guice_2.10 (An archetype which creates an empty Scalate Guice web application)
13: remote -> org.fusesource.scalate.tooling:scalate-archetype-guice_2.9 (An archetype which creates an empty Scalate Guice web application)
14: remote -> org.fusesource.scalate.tooling:scalate-archetype-jersey (An archetype which creates an empty Scalate web application)
15: remote -> org.fusesource.scalate.tooling:scalate-archetype-jersey_2.10 (An archetype which creates an empty Scalate web application)
16: remote -> org.fusesource.scalate.tooling:scalate-archetype-jersey_2.9 (An archetype which creates an empty Scalate web application)
17: remote -> org.fusesource.scalate.tooling:scalate-archetype-sitegen (An archetype which creates an empty Scalate static website generation project)
18: remote -> org.fusesource.scalate.tooling:scalate-archetype-sitegen_2.10 (An archetype which creates an empty Scalate static website generation project)
19: remote -> org.fusesource.scalate.tooling:scalate-archetype-sitegen_2.9 (An archetype which creates an empty Scalate static website generation project)
20: remote -> org.openjdk.jmh:jmh-scala-benchmark-archetype (Generates Scala benchmarking project, uses JMH bytecode processors)
21: remote -> org.scala-tools.archetypes:scala-archetype-simple (The maven-scala-plugin is used for compiling/testing/running/documenting scala code in maven.)
22: remote -> org.scalatra.scalate.tooling:scalate-archetype-guice_2.10 (An archetype which creates an empty Scalate Guice web application)
23: remote -> org.scalatra.scalate.tooling:scalate-archetype-guice_2.11 (An archetype which creates an empty Scalate Guice web application)
24: remote -> org.scalatra.scalate.tooling:scalate-archetype-jersey_2.10 (An archetype which creates an empty Scalate web application)
25: remote -> org.scalatra.scalate.tooling:scalate-archetype-jersey_2.11 (An archetype which creates an empty Scalate web application)
26: remote -> org.scalatra.scalate.tooling:scalate-archetype-sitegen_2.10 (An archetype which creates an empty Scalate static website generation project)
27: remote -> org.scalatra.scalate.tooling:scalate-archetype-sitegen_2.11 (An archetype which creates an empty Scalate static website generation project)
28: remote -> org.wicketstuff.scala:wicket-scala-archetype (Basic setup for a project that combines Scala and Wicket, 
        depending on the Wicket-Scala project. Includes an example Specs 
        test.)
29: remote -> org.wicketstuff.scala:wicketstuff-scala-archetype (Basic setup for a project that combines Scala and Wicket, 
        depending on the Wicket-Scala project. Includes an example Specs 
        test.)
30: remote -> pl.org.miki:scala-quickstart-archetype (Customizable cruft-free Scala archetype. Options:
-sourceFolders: [all-in-src-java, scala-only, both-split-src]. DEFAULT: all-in-src-java.
--all-in-src-java: Scala and Java code are both in src/main/java (same for test). Plays nicely with IDEs.
--scala-only: only src/main/scala set up, and set as source folder.
--both-split-src: both src/main/java and src/main/scala. Can play merry havock with IDEs, so not the default.
-testLibrary: [scalatest, specs2, scalacheck-only, junit-only]. DEFAULT: scalatest.
--scalatest: adds Scalatest AND Scalacheck AND JUnit for most of your testing needs.
--specs2: adds specs2 AND Scalacheck AND JUnit.
--scalacheck-junit: adds Scalacheck AND JUnit.
--junit-only: adds JUnit ONLY.
-scalaVersion: 2.10.x+. DEFAULT: 2.11.2.
*The Scala tool version is generated automatically.
*Some Scala versions may not be compatible with selected test library versions. Adjust as necessary.)
Choose a number or apply filter (format: [groupId:]artifactId, case sensitive contains): : 

Choose simple archetype ( number 5 or 30 )

https://github.com/mikolak-net/scala-quickstart-archetype 

Choose a number or apply filter (format: [groupId:]artifactId, case sensitive contains): : 5
Choose net.alchim31.maven:scala-archetype-simple version: 
1: 1.4
2: 1.5
3: 1.6
Choose a number: 3: 3
Downloading: http://maven.repository.redhat.com/earlyaccess/all/net/alchim31/maven/scala-archetype-simple/1.6/scala-archetype-simple-1.6.jar
Downloading: http://maven.repository.redhat.com/techpreview/all/net/alchim31/maven/scala-archetype-simple/1.6/scala-archetype-simple-1.6.jar
Downloading: https://repo.maven.apache.org/maven2/net/alchim31/maven/scala-archetype-simple/1.6/scala-archetype-simple-1.6.jar
Downloaded: https://repo.maven.apache.org/maven2/net/alchim31/maven/scala-archetype-simple/1.6/scala-archetype-simple-1.6.jar (5 KB at 16.5 KB/sec)
Downloading: http://maven.repository.redhat.com/earlyaccess/all/net/alchim31/maven/scala-archetype-simple/1.6/scala-archetype-simple-1.6.pom
Downloading: http://maven.repository.redhat.com/techpreview/all/net/alchim31/maven/scala-archetype-simple/1.6/scala-archetype-simple-1.6.pom
Downloading: https://repo.maven.apache.org/maven2/net/alchim31/maven/scala-archetype-simple/1.6/scala-archetype-simple-1.6.pom
Downloaded: https://repo.maven.apache.org/maven2/net/alchim31/maven/scala-archetype-simple/1.6/scala-archetype-simple-1.6.pom (4 KB at 33.7 KB/sec)
Define value for property 'groupId': : scala
Define value for property 'artifactId': : class-finder
Define value for property 'version':  1.0-SNAPSHOT: : 
Define value for property 'package':  scala: : dave
Confirm properties configuration:
groupId: scala
artifactId: class-finder
version: 1.0-SNAPSHOT
package: dave
 Y: : 

Created project

[dave@localhost scala]$ find 
.
./class-finder
./class-finder/pom.xml
./class-finder/.gitignore
./class-finder/src
./class-finder/src/main
./class-finder/src/main/scala
./class-finder/src/main/scala/dave
./class-finder/src/main/scala/dave/App.scala
./class-finder/src/test
./class-finder/src/test/scala
./class-finder/src/test/scala/samples
./class-finder/src/test/scala/samples/junit.scala
./class-finder/src/test/scala/samples/specs.scala
./class-finder/src/test/scala/samples/scalatest.scala

Add into pom.xml  the build-helper-maven-plugin to add new source folders as described here http://docs.scala-lang.org/tutorials/scala-with-maven.html

Import existing  Maven  project into Eclipse

Edit .project and .classpath files to include Scala

Optionally
  -- Run mvn eclipse:eclipse in project dir
  --- Configure Eclipse workspace

dave@localhost class-finder]$ mvn -Declipse.workspace="/home/dave/workspace/scala"  eclipse:configure-workspace

.project

[dave@localhost class-finder]$ more .project 
<?xml version="1.0" encoding="UTF-8"?>
<projectDescription>
    <name>class-finder</name>
    <comment></comment>
    <projects>
    </projects>
    <buildSpec>
        <buildCommand>
            <name>org.eclipse.jdt.core.javabuilder</name>
            <arguments>
            </arguments>
        </buildCommand>
        <buildCommand>
            <name>org.scala-ide.sdt.core.scalabuilder</name>
            <arguments>
            </arguments>
        </buildCommand>
        <buildCommand>
            <name>org.eclipse.m2e.core.maven2Builder</name>
            <arguments>
            </arguments>
        </buildCommand>
    </buildSpec>
    <natures>
        <nature>org.scala-ide.sdt.core.scalanature</nature>
        <nature>org.eclipse.jdt.core.javanature</nature>
        <nature>org.eclipse.m2e.core.maven2Nature</nature>
    </natures>
</projectDescription>

.classpath

[dave@localhost class-finder]$ more .classpath 
<?xml version="1.0" encoding="UTF-8"?>
<classpath>
    <classpathentry kind="src" output="target/classes" path="src/main/java">
        <attributes>
            <attribute name="optional" value="true"/>
            <attribute name="maven.pomderived" value="true"/>
        </attributes>
    </classpathentry>
    <classpathentry kind="src" output="target/test-classes" path="src/test/java">
        <attributes>
            <attribute name="optional" value="true"/>
            <attribute name="maven.pomderived" value="true"/>
        </attributes>
    </classpathentry>
    <classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMTyp
e/JavaSE-1.8">
        <attributes>
            <attribute name="maven.pomderived" value="true"/>
        </attributes>
    </classpathentry>
    <classpathentry kind="con" path="org.eclipse.m2e.MAVEN2_CLASSPATH_CONTAINER">
        <attributes>
            <attribute name="maven.pomderived" value="true"/>
        </attributes>
    </classpathentry>
    <classpathentry kind="src" output="target/classes" path="src/main/scala">
        <attributes>
            <attribute name="optional" value="true"/>
            <attribute name="maven.pomderived" value="true"/>
        </attributes>
    </classpathentry>
    <classpathentry kind="src" output="target/test-classes" path="src/test/scala">
        <attributes>
            <attribute name="optional" value="true"/>
            <attribute name="maven.pomderived" value="true"/>
        </attributes>
    </classpathentry>
    <classpathentry kind="output" path="target/classes"/>
</classpath>

pom.xml

[dave@localhost class-finder]$ more pom.xml 
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven
.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>scala</groupId>
    <artifactId>class-finder</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>jar</packaging>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <java.version>1.8</java.version>
        <scala.version>2.11.7</scala.version>
        <scala.version.tools>2.11</scala.version.tools>
    </properties>

    <build>
        <plugins>
            <plugin>
                <groupId>net.alchim31.maven</groupId>
                <artifactId>scala-maven-plugin</artifactId>
                <version>3.2.0</version>
                <executions>
                    <execution>
                        <!-- this is so we don't end with a compile error in maven-compiler-plugin -->        
                        <phase>process-sources</phase>                     
                        <goals>
                            <goal>compile</goal>
                            <goal>testCompile</goal>
                        </goals>
                        <configuration>
                            <mainSourceDir>${project.build.sourceDirectory}/../java</mainSourceDir>
                        </configuration>
                    </execution>
                </executions>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.1</version>
                <configuration>
                    <source>${java.version}</source>
                    <target>${java.version}</target>
                </configuration>
            </plugin>
        <plugin>
    <groupId>org.codehaus.mojo</groupId>
    <artifactId>build-helper-maven-plugin</artifactId>
    <executions>
        <execution>
            <id>add-source</id>
            <phase>generate-sources</phase>
            <goals>
                <goal>add-source</goal>
            </goals>
            <configuration>
                <sources>
                    <source>src/main/scala</source>
                </sources>
            </configuration>
        </execution>
        <execution>
            <id>add-test-source</id>
            <phase>generate-sources</phase>
            <goals>
                <goal>add-test-source</goal>
            </goals>
            <configuration>
                <sources>
                    <source>src/test/scala</source>
                </sources>
            </configuration>
        </execution>
    </executions>
</plugin>
 <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-assembly-plugin</artifactId>
                <version>2.4</version>
                <configuration>
                    <descriptorRefs>
                        <descriptorRef>jar-with-dependencies</descriptorRef>
                    </descriptorRefs>
                    <archive>
                        <manifest>
                            <mainClass>dave.MainClass</mainClass>
                        </manifest>
                    </archive>
                </configuration>
                <executions>
                    <execution>
                        <phase>package</phase>
                        <goals>
                            <goal>single</goal>
                        </goals>
                    </execution>
                </executions>
        </plugin>


        </plugins>
    </build>
    <dependencies>
        <dependency>
            <groupId>org.scala-lang</groupId>
            <artifactId>scala-library</artifactId>
            <version>${scala.version}</version>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.11</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.scalacheck</groupId>
            <artifactId>scalacheck_${scala.version.tools}</artifactId>
            <version>1.11.4</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.scalatest</groupId>
            <artifactId>scalatest_${scala.version.tools}</artifactId>
            <version>2.2.0</version>
            <scope>test</scope>
        </dependency>
    </dependencies>
</project>

Run mvn package 

Open project in Eclipse IDE

Add launcher for command line

<build>
        <plugins>
            <plugin>
                <groupId>net.alchim31.maven</groupId>
                <artifactId>scala-maven-plugin</artifactId>
                <version>3.2.0</version>
                <configuration>
      <launchers>
        <launcher>
          <id>foo</id>
          <mainClass>dave.App</mainClass>
          <!-- args are optional -->
          <args>
            <arg>arg1</arg>
          </args>
          <!-- jvmArgs are optional -->
          <jvmArgs>
            <jvmArg>-Xmx128m</jvmArg>
            <jvmArg>-Djava.library.path=...</jvmArg>
          </jvmArgs>
        </launcher>
        <!-- you could define other launcher -->
      </launchers>
    </configuration>

Run project  from command line

mvn scala:run

[INFO] launcher 'foo' selected => dave.App
Hello World!
concat arguments = arg1
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------

Known errors

http://scala-ide.org/docs/current-user-doc/faq/index.html#Know_Issue

Add m2e-scala http://alchim31.free.fr/m2e-scala/update-site/

If you see errors in using prototype modify the pom.xml

[INFO] /home/dave/git/scala/class-finder/src/main/scala:-1: info: compiling
[INFO] Compiling 1 source files to /home/dave/git/scala/class-finder/target/classes at 1447218248818
[ERROR] scalac error: bad option: '-make:transitive'

see here http://stackoverflow.com/questions/12812458/getting-started-with-scala-scalatest-and-maven

Try to change versions in pom.xml or  change options for scala-maven-plugin

https://github.com/davidB/scala-maven-plugin
  
https://github.com/scala/scala-module-dependency-sample/blob/master/maven-sample/pom.xml

Error related to versions of Scala artifacts - change the repository configuration

[ERROR] Failed to execute goal on project class-finder: Could not resolve dependencies for project scala:class-finder:jar:1.0-SNAPSHOT: Could not find artifact org.scalaz.stream:scalaz-stream_2.11:jar:0.7a in jboss-earlyaccess-repository (http://maven.repository.redhat.com/earlyaccess/all/) -> [Help 1]

Mixed Java and Scala development in Eclipse

http://scala-ide.org/
http://www.codecommit.com/blog/java/interop-between-java-and-scala

.classpath file

<?xml version="1.0" encoding="UTF-8"?>
<classpath>
    <classpathentry kind="src" path="src"/>
    <classpathentry kind="con" path="org.scala-ide.sdt.launching.SCALA_CONTAINER"/>
    <classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.inter
nal.debug.ui.launcher.StandardVMType/JavaSE-1.7"/>
    <classpathentry kind="output" path="bin"/>
</classpath>

.project file

<?xml version="1.0" encoding="UTF-8"?>
<projectDescription>
    <name>testScala</name>
    <comment></comment>
    <projects>
    </projects>
    <buildSpec>
        <buildCommand>
            <name>org.scala-ide.sdt.core.scalabuilder</name>
            <arguments>
            </arguments>
        </buildCommand>
    </buildSpec>
    <natures>
        <nature>org.scala-ide.sdt.core.scalanature</nature>
        <nature>org.eclipse.jdt.core.javanature</nature>
    </natures>
</projectDescription>

TestPerson.scala class

package dave

object  TestPerson {
  def main(args: Array[String]) {
    val person = new Person("dave")

    println(person)
  }
}

Person.java class

package dave;

public class Person {
    
    String name;
    
    public Person() {}
    
    
    public Person(String name) {
        this.name= name;
    }
    
    public String getName() {
        return name;
    }


    public void setName(String name) {
        this.name = name;
    }


    @Override
    public String toString() {
        return "Person [name=" + name + "]";
    }

    
    
}

Eclipse with Scala plugin

Java buildpath

All files in project

[dave@dave testScala]$ ls -lRa
.:
total 32
drwxrwxr-x. 5 dave dave 4096 Oct  9 22:41 .
drwxrwxr-x. 5 dave dave 4096 Oct  9 22:04 ..
drwxrwxr-x. 3 dave dave 4096 Oct  9 22:41 bin
-rw-rw-r--. 1 dave dave 2222 Oct  9 22:51 .cache
-rw-rw-r--. 1 dave dave  376 Oct  9 22:04 .classpath
-rw-rw-r--. 1 dave dave  425 Oct  9 22:04 .project
drwxrwxr-x. 2 dave dave 4096 Oct  9 22:40 .settings
drwxrwxr-x. 3 dave dave 4096 Oct  9 22:04 src

./bin:
total 12
drwxrwxr-x. 3 dave dave 4096 Oct  9 22:41 .
drwxrwxr-x. 5 dave dave 4096 Oct  9 22:41 ..
drwxrwxr-x. 2 dave dave 4096 Oct  9 22:51 dave

./bin/dave:
total 20
drwxrwxr-x. 2 dave dave 4096 Oct  9 22:51 .
drwxrwxr-x. 3 dave dave 4096 Oct  9 22:41 ..
-rw-rw-r--. 1 dave dave  821 Oct  9 22:41 Person.class
-rw-rw-r--. 1 dave dave  648 Oct  9 22:51 TestPerson.class
-rw-rw-r--. 1 dave dave  706 Oct  9 22:51 TestPerson$.class

./.settings:
total 16
drwxrwxr-x. 2 dave dave 4096 Oct  9 22:40 .
drwxrwxr-x. 5 dave dave 4096 Oct  9 22:41 ..
-rw-rw-r--. 1 dave dave  587 Oct  9 22:04 org.eclipse.jdt.core.prefs
-rw-rw-r--. 1 dave dave  847 Oct  9 22:40 org.scala-ide.sdt.core.prefs

./src:
total 12
drwxrwxr-x. 3 dave dave 4096 Oct  9 22:04 .
drwxrwxr-x. 5 dave dave 4096 Oct  9 22:41 ..
drwxrwxr-x. 2 dave dave 4096 Oct  9 22:20 dave

./src/dave:
total 16
drwxrwxr-x. 2 dave dave 4096 Oct  9 22:20 .
drwxrwxr-x. 3 dave dave 4096 Oct  9 22:04 ..
-rw-rw-r--. 1 dave dave  328 Oct  9 22:25 Person.java
-rw-rw-r--. 1 dave dave  131 Oct  9 22:51 TestPerson.scala
[dave@dave testScala]$