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![Scalastyle! - scalastyle-config.xml
<scalastyle>!
<name>Scalastyle sample configuration</name>!
<check level=“warning”!
class=“org.scalastyle.file.FileLineLengthChecker"!
enabled="true">!
<parameters>!
<parameter name="maxLineLength"><![CDATA[100]]></parameter>!
<parameter name="tabSize"><![CDATA[2]]></parameter>!
</parameters>!
</check>!
</scalastyle>
#DV13PlayTricks
@elmanu](https://image.slidesharecdn.com/play2tricks-131116104035-phpapp01/75/Tips-and-tricks-for-setting-up-a-Play-2-project-13-2048.jpg)
: A = {!
!
val USERS = classOf[Users]!
!
val instance = controllerClass match {!
case USERS => new Users("Hello users")!
case _ => super.getControllerInstance(controllerClass)!
}!
!
instance.asInstanceOf[A]!
}!
}
#DV13PlayTricks
@elmanu](https://image.slidesharecdn.com/play2tricks-131116104035-phpapp01/75/Tips-and-tricks-for-setting-up-a-Play-2-project-38-2048.jpg)
Uploaded byManuel Bernhardt
Tips and tricks for setting up a Play 2 project
The document provides a comprehensive guide for setting up a Play 2 project, detailing configuration examples in both `build.sbt` and `plugins.sbt` files. It emphasizes the use of tools such as Scalariform for code formatting, Scalastyle for code quality checks, and mentions the need for managing snapshot dependencies effectively. Additionally, it discusses the structure of multi-module projects, dependency injection, and includes links to useful resources and tools for enhancing the development experience.
Tips and tricks for setting up a Play 2 project
- 1. Tips and tricksfor setting up a Play 2 project ! ! Manuel Bernhardt #DV13PlayTricks @elmanu
- 2. play new hello-play Let’sget started #DV13PlayTricks @elmanu
- 3. Hello world -build.sbt name := "hello-play"! ! version := "1.0-SNAPSHOT"! ! libraryDependencies ++= Seq(! jdbc,! anorm,! cache! ) ! ! play.Project.playScalaSettings! #DV13PlayTricks @elmanu
- 4. Hello world -plugins.sbt // Comment to get more information during initialization! logLevel := Level.Warn! ! // The Typesafe repository ! resolvers += "Typesafe repository" at "http:// repo.typesafe.com/typesafe/releases/"! ! // Use the Play sbt plugin for Play projects! addSbtPlugin("com.typesafe.play" % "sbt-plugin" % "2.2.1")! #DV13PlayTricks @elmanu
- 5. First things first:Scalariform ! Code indentation is good for your health #DV13PlayTricks @elmanu
- 6. Scalariform! - plugins.sbt //Comment to get more information during initialization! logLevel := Level.Warn! ! // The Typesafe repository ! resolvers += "Typesafe repository" at "http:// repo.typesafe.com/typesafe/releases/"! ! // Use the Play sbt plugin for Play projects! addSbtPlugin("com.typesafe.play" % "sbt-plugin" % "2.2.0")! ! addSbtPlugin("com.typesafe.sbt" % "sbt-scalariform" % "1.2.0")! #DV13PlayTricks @elmanu
- 7. Scalariform! - build.sbt name:= "hello-play"! ! version := "1.0-SNAPSHOT"! ! libraryDependencies ++= Seq(cache)! ! play.Project.playScalaSettings! ! scalariformSettings #DV13PlayTricks @elmanu
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- 11. Scalastyle! - plugins.sbt //Comment to get more information during initialization! logLevel := Level.Warn! ! // The Typesafe repository ! resolvers += "Typesafe repository" at "http:// repo.typesafe.com/typesafe/releases/"! ! // Use the Play sbt plugin for Play projects! addSbtPlugin("com.typesafe.play" % "sbt-plugin" % "2.2.0")! ! addSbtPlugin("com.typesafe.sbt" % "sbt-scalariform" % "1.2.0")! ! addSbtPlugin("org.scalastyle" %% "scalastyle-sbt-plugin" % "0.3.2") #DV13PlayTricks @elmanu
- 12. Scalastyle! - build.sbt name:= "hello-play"! ! version := "1.0-SNAPSHOT"! ! libraryDependencies ++= Seq(cache)! ! play.Project.playScalaSettings! ! scalariformSettings! ! org.scalastyle.sbt.ScalastylePlugin.Settings #DV13PlayTricks @elmanu
- 13. Scalastyle! - scalastyle-config.xml <scalastyle>! <name>Scalastylesample configuration</name>! <check level=“warning”! class=“org.scalastyle.file.FileLineLengthChecker"! enabled="true">! <parameters>! <parameter name="maxLineLength"><![CDATA[100]]></parameter>! <parameter name="tabSize"><![CDATA[2]]></parameter>! </parameters>! </check>! </scalastyle> #DV13PlayTricks @elmanu
- 14. Scalastyle! - Output <?xmlversion="1.0" encoding="US-ASCII"?>! <checkstyle version=“5.0”>! <file name=“/Users/manu/w/hello-play/app/controllers/Application.scala">! <error line=“12"! source=“org.scalastyle.file.FileLineLengthChecker"! severity=“warning"! message="File line length exceeds 100 characters”>! </error>! </file>! </checkstyle>! #DV13PlayTricks @elmanu
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- 17. Sub-projects - build.sbt play.Project.playScalaSettings! ! defplayProject(name: String) = play.Project(! name = name,! path = file("modules/" + name)! ).! settings(scalariformSettings :_*).! settings(org.scalastyle.sbt.ScalastylePlugin.Settings :_*)! ! lazy val core = playProject("core")! ! lazy val module1 = playProject("module1").dependsOn(core)! ! lazy val module2 = playProject("module2").dependsOn(core)! ! lazy val root = playProject("hello-play").in(file(".")).! ! ! dependsOn(module1, module2).! aggregate(module1, module2) #DV13PlayTricks @elmanu
- 18. Sub-projects - build.sbt play.Project.playScalaSettings! ! defplayProject(name: String) = play.Project(! name = name,! path = file("modules/" + name)! ).! settings(scalariformSettings :_*).! settings(org.scalastyle.sbt.ScalastylePlugin.Settings :_*)! ! lazy val core = playProject("core")! ! lazy val module1 = playProject("module1").dependsOn(core)! ! lazy val module2 = playProject("module2").dependsOn(core)! ! lazy val root = playProject("hello-play").in(file(".")).! ! ! dependsOn(module1, module2).! aggregate(module1, module2) #DV13PlayTricks @elmanu
- 19. Sub-projects - build.sbt play.Project.playScalaSettings! ! defplayProject(name: String) = play.Project(! name = name,! path = file("modules/" + name)! ).! settings(scalariformSettings :_*).! settings(org.scalastyle.sbt.ScalastylePlugin.Settings :_*)! ! lazy val core = playProject("core")! ! lazy val module1 = playProject("module1").dependsOn(core)! ! lazy val module2 = playProject("module2").dependsOn(core)! ! lazy val root = playProject("hello-play").in(file(".")).! ! ! dependsOn(module1, module2).! aggregate(module1, module2) #DV13PlayTricks @elmanu
- 20. Sub-projects - build.sbt play.Project.playScalaSettings! ! defplayProject(name: String) = play.Project(! name = name,! path = file("modules/" + name)! ).! settings(scalariformSettings :_*).! settings(org.scalastyle.sbt.ScalastylePlugin.Settings :_*)! ! lazy val core = playProject("core")! ! lazy val module1 = playProject("module1").dependsOn(core)! ! lazy val module2 = playProject("module2").dependsOn(core)! ! lazy val root = playProject("hello-play").in(file(".")).! ! ! dependsOn(module1, module2).! aggregate(module1, module2) #DV13PlayTricks @elmanu
- 21. Sub-projects - build.sbt play.Project.playScalaSettings! ! defplayProject(name: String) = play.Project(! name = name,! path = file("modules/" + name)! ).! settings(scalariformSettings :_*).! settings(org.scalastyle.sbt.ScalastylePlugin.Settings :_*)! ! lazy val core = playProject("core")! ! lazy val module1 = playProject("module1").dependsOn(core)! ! lazy val module2 = playProject("module2").dependsOn(core)! ! lazy val root = playProject("hello-play").in(file(".")).! ! ! dependsOn(module1, module2).! aggregate(module1, module2) #DV13PlayTricks @elmanu
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- 25. Snapshot dependencies and multi-moduleprojects Workarounds #DV13PlayTricks @elmanu
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- 28. Snapshot dependencies -workarounds • Don’t use snapshot dependencies • Convince library authors to make releases • Use a cache, e.g. Squid • OS X: http://squidman.net/squidman -‐Dhttp.proxyHost=localhost -‐Dhttp.proxyPort=8090 #DV13PlayTricks @elmanu
- 29. Tools for Chrome Afterall, we’re building web-applications #DV13PlayTricks @elmanu
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- 31. Play Auto Refresh- plugins.sbt // Comment to get more information during initialization! logLevel := Level.Warn! ! // The Typesafe repository ! resolvers += "Typesafe repository" at "http://repo.typesafe.com/ typesafe/releases/"! ! // Use the Play sbt plugin for Play projects! addSbtPlugin("com.typesafe.play" % "sbt-plugin" % "2.2.0")! ! addSbtPlugin("com.typesafe.sbt" % "sbt-scalariform" % "1.2.0")! ! addSbtPlugin("org.scalastyle" %% "scalastyle-sbt-plugin" % "0.3.2")! ! addSbtPlugin("com.jamesward" %% "play-auto-refresh" % "0.0.7") #DV13PlayTricks @elmanu
- 32. Play Auto Refresh- build.sbt name := "hello-play"! ! version := "1.0-SNAPSHOT"! ! libraryDependencies ++= Seq(! jdbc,! anorm,! cache! ) ! ! play.Project.playScalaSettings! ! scalariformSettings! ! org.scalastyle.sbt.ScalastylePlugin.Settings! ! com.jamesward.play.BrowserNotifierPlugin.livereload #DV13PlayTricks @elmanu
- 33. Chrome Your IDE play ~run No more ⌘+R, yeah! #DV13PlayTricks @elmanu
- 34. Open errors inIDE Click to open in editor Instructions at https://github.com/jamesward/play-framework-chrome-tools #DV13PlayTricks @elmanu
- 35. Use dependency injectionright away A poor man’s solution #DV13PlayTricks @elmanu
- 36. DI - Userscontroller package controllers! ! class Users(greeting: String) extends BaseController {! ! def hello = Action { implicit request =>! ! Ok(greeting)! }! ! } #DV13PlayTricks @elmanu
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- 38. DI - Global.scala importcontrollers.Users! import play.api.GlobalSettings! ! object Global extends GlobalSettings {! ! override def getControllerInstance[A](controllerClass: Class[A]): A = {! ! val USERS = classOf[Users]! ! val instance = controllerClass match {! case USERS => new Users("Hello users")! case _ => super.getControllerInstance(controllerClass)! }! ! instance.asInstanceOf[A]! }! } #DV13PlayTricks @elmanu
- 39.