Technical Blog: Functional Programming, Cloud Architecture & DevOps

Currently I am moving from spring mvc + tomcat to finatra. I had a weird problem with my api. My api post request expects contextOfText: String , but when I make request , it returns error and expects context_of_text. I have never such problem before. Couldn’t know how to search for this problem.. Anyway my work mate told that might be serializer problem. After some research I found some custom jackson module for finatra. Tried to see if it has any effects and fixed with first try. It seems default FinatraJacksonModule is using SNAKE_CASE, therefore it converts variable names. Here I changed it to CamelCasePropertyNamingStrategy.

I was thinking to rewrite my summarizer app for a while. But couldn’t decide what to use, should I move to play mvc or sth else.. There was a Scala meeting in Helsinki this year, so I joined to meeting and first time I heard about Finatra. Finatra is an HTTP API framework built on top of Finagle. Twitter, Tumblr vs. some big companies use it and develop same time. The project is very active! The documentation is well written. You can easily start to write a sample app. So after some tryings I decided to use Finatra for my service. And about database, basically I store text documents and summaries, so it was easy decision to use Mongodb.

While running my app with Intellij Idea , I had no problems with resource folder. It was reading files and passing tests. It was implemented like this:

val resourcesPath = getClass.getResource("/lexical/stopWords.csv").getPath
val source = fromFile(resourcesPath)
val text = try source.mkString finally source.close()

Problem is that idea shows warning if you dont have a blank line following the header in a file. My environment is:

scalaVersion: "2.12.4"
sbt.version: "1.1.5"
addSbtPlugin("org.scalastyle" %% "scalastyle-sbt-plugin" % "1.0.0")

I was trying to mock my call-by-name function with ScalaMock, so it can run the passed function inside my mock. My workmates helped me to find the solution. Error: scala.concurrent.impl.Promise$DefaultPromise@69b28a51 cannot be cast to Either The problem is related with my mock for myFunction(). I pass a call-by-name function to myFunction()(f: => T) which returns T, after evaluating it, myFunction() returns Either[ErrorCode, T]. So the mock should be like that:

Problem is that can not find the function we call. Try put the function top of it. Or still not work then define as lazy value. If it is referenced somewhere and scalac is confused with the sequence, making it lazy could do the trick Example: ```scala def functionA() { functionB() }

1. From the Run menu, select Edit configurations
2. Click the + button and select SBT Task.
3. Name it Run the program.
4. In the Tasks field, type ~run. The ~ causes SBT to rebuild and rerun the project when you save changes to a file in the project.
5. Click OK.
6. On the Run menu. Click Run ‘Run the program’.

Almost 4 years I have been using tumblr for blogging. I was not happy with tumblr because of google analytics and crawling problems. And I want to try something different. First I tried wordpress but it didn’t work well with my home server, I have an orange pi, so it was very slow to open any page with wordpress. I decided to use static blog, after some research, It was best to use Jekyll for blogging. Good idea but a bit hard to move everything, because there is not any tool which can move to all tumblr posts to your jekyll blog. After trying some tools I finally found a way to move all posts!

• refactoring : shift + F6

For example; we have branch task-12 multiple people commit to branch and they fix conflicts you want to git pull and then commit your changes but when you git pull it has conflict with your local copy of this branch then follow this steps to get latest version of branch without confilicts