State Calculator

It is assumed that dependency_of field can be trusted

• Scopt used for command line parameters parsing
• json4s used for json serialization and deserialization

The main logic is

• Prepare a map of components by their ids
• Set derived/own states of the components
• Sort events by timestamp and update the states by the events
• Breath First Search for alert components so that we wont miss components because of early visiting of no_data/clear/warning components
• Breath First Search for warning components so that we wont miss components because of early visiting of no_data/clear components

TODOs

• Don't show when list/set/map are empty in json
• Try reducing the mutable collections using copy() or etc
• More testing could be added
• Metrics could be added
• Benchmark test could be added

Prerequisites

• Install scala 2.12
• Install sbt 1.1.1 or newer

Test with Coverage and Report

sbt clean coverage test coverageReport

Build

sbt assembly

Docker Build

sbt docker:publishLocal

Run

java -jar target/scala-2.12/state-calculator.jar -g graph.json -e events.json 

or

./run.sh src/test/resources/graph.json src/test/resources/events.json

Docker Run

docker run -v ${localPath}:/opt/files -it state-calculator:0.1 -g /opt/files/graph.json -e /opt/files/events.json