A minimalist application for calling RESTful services asynchronously with Java.

All of the classes are bundled in single package, most of the logic is contained inside com.traderquery.Main class. It has 2 methods, namely main and solveProblems.

Inside main function, we can see how to set rest client and then call both all traders and all transactions simultaneously using RxJava. Function solveProblems is invoked only when both REST call responses are received by our application.

All the infrastructures magic have already done when solveProblems is called, because all the logic inside this function is only plain and standard Java 8 code.

Assuming you have installed JDK8+ and JAVA_HOME has been set, just run:

• git clone https://github.com/arinal/traderquery.git && cd traderquery
• ./gradlew run

If everything is correct, you will see this output in your screen:

find all singapaporean traders sorted by name
Id: 195fbb57ffe7449796d23466085ce6d8, name: May, City: Singapore
Id: 75f87fa90004d185432caa1dfb208bbf, name: Brittany, City: Singapore
..

transaction with highest transaction value
Date: Thu May 30 20:25:50 WIB 2013, Value: 0.9817253648270564, Trader: f9dc77cece7fa16f6edd2d1d64853e4b

all transactions in 2016 sorted descendingly by date
Date: Wed Jul 27 00:01:44 WIB 2016, Value: 0.9057669559853739, Trader: ba0e0cde1bf72c28d435c89a66afc61a
Date: Sat Jul 23 19:50:18 WIB 2016, Value: 0.8400671857631128, Trader: 75f87fa90004d185432caa1dfb208bbf
..

average beijing traders' transaction
0.402193042651789256875