lamlephamngoc / solution

Processing Huge Transactions CSV challenges

• csv/transactions.csv is small set data of given transactions.zip for running test cases
• please run intellij test with coverage and mvn clean surefire-report:report and then replacing the real transactions.csv
• we build fat jar file (application) without test for avoiding failing test cases

Tech Stacks

• java 8
• maven 3
• intellij

Sub libraries

• picocli for command line parsing
• okhttp for fetch exchange rate API
• fastjson alibaba for processing JSON return from API
• junit 5 for boundary test context

Setup for MacOS

Java 8

    brew tap adoptopenjdk/openjdk
    brew install --cask adoptopenjdk8

Maven 3.8.6

    brew install maven

Build fat jar file

    mvn clean install -DskipTests

Move fat jar file to root folder/directory

    mv target/solution-1.0.0.jar .
    

Run jar file with arguments - default CSV file path at ./csv/transactions.csv

We do not have option for changing CSV file path in our challenge

    
    # no argument
    java -jar solution-1.0.0.jar 

    # given token
    java -jar solution-1.0.0.jar -t BTC
    
    # given date
    java -jar solution-1.0.0.jar -d 2019-10-25
    
    # given token & date
    java -jar solution-1.0.0.jar -t BTC -d 2019-10-25
    
    # with testing exchange rate
    # BTC USD is 30_000
    # ETH USD is 1_000
    # XRP USD is 0.3
    java -jar solution-1.0.0.jar -test 
    

Run test cases by Intellij

• Right click on src/test/java -> More Run/Debug -> Run 'All Tests' with Coverage

Run test by Commandline

    mvn clean test
    
    mvn clean surefire-report:report

• Please refer ./docs/surefire-report.html

Final Result