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SBT, Scrooge, Intellij and You By @VictorOps | @DevOpsSummit [#DevOps]

We are going through the process of overhauling the serialization framework that we use for inter & intra process communication

How to Set Up a Playdate Between Scala, Thrift, Scrooge, SBT and Intellij
By Nick Isaacs

Here at VictorOps, we are going through the process of overhauling the serialization framework that we use for inter and intra process communication. We evaluated several great options including Kryo (and its Scala companion Chill), Protobuffers, and Thrift.

In the process, we put together a little test project to help us decide which of these choices was right for us. Testing Thrift posed some challenges as the tooling, while quite mature, wasn’t quite as plug-n-play with our local development environment as we would have liked. The following instructions assume a basic knowledge of the Scala/SBT framework, Thrift, and (optionally) Intellij.

What is needed:

Steps:

1. Create a new project with a build.sbt file and add the following lines:

libraryDependencies ++= Seq( "org.apache.thrift" % "libthrift" % "0.8.0", "com.twitter" % "scrooge-core_2.11" % "3.17.0" )

com.twitter.scrooge.ScroogeSBT.newSettings unmanagedSourceDirectories in Compile += baseDirectory.value / "target" / "scala-2.11" / "src_managed"

This will add the Thrift and Scrooge dependencies to your sbt project.

2. If you do not already have a project/plugins.sbt file, create one and add the following line:

addSbtPlugin("com.twitter" % "scrooge-sbt-plugin" % "3.14.1")

3. Create a new directory to hold your Thrift files (by default, Scrooge will check in src/main/thrift, which worked fine for us)

4. Define some Thrift files, if you want, here is a simple example:

namespace java com.example.thrift.java
#@namespace scala com.example.thrift.scala

typedef list<string> friendList

struct NastyCaseClass {
1: string firstName,
2: string lastName,
3: bool ownsPetOtter,
6: friendList listOfFriends,
}

5. By default, Intellij marks everything in the target/ directory as ‘excluded’ for builds. We are gonna have to do something about that.

  • Open up the “project structure” window & click “modules in the right hand menu

Screenshot 2015-03-03 15.16.27

  • Click on the name of your project, you should see the directory structure appear

Screenshot 2015-03-03 15.17.05

  • Click “target” and uncheck “Excluded”

Screenshot 2015-03-03 15.17.13

  • Expand “target” and mark all subfolders as “Excluded” except for scala-version.no

screenshot_2015-03-05_13.05.49

  • Expand “scala-version.no” and mark all folders as “Excluded” except for “src_managed” which you should mark as “Source”

Screenshot 2015-03-03 15.18.30

6. Run an SBT clean, scrooge-gen, and compile. All generated files should now be visible to both SBT and Intellij (hooray for syntax highlighting)

Hope this helps anyone in a similar situation. Another thing to note was that updating *.thrift files would cause SBT to become a bit “unhappy”. To rectify this, simply run a scrooge-gen and a clean after making edits.

Happy serializing  :)

The post SBT, Scrooge, Intellij and You appeared first on VictorOps.

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