The REST Api for money transfer. Technologies used:

1. Maven as project management tool
2. SparkJava framework for REST
3. Guice for dependency injection
4. JUnit and Mockito for testing

API Documentation is available in

\revolut\target\site\apidocs or https://vighnesh.org/revolut/apidocs

Usage

To run the application:

1. mvn clean package //will create jar file
2. java -jar revolut\target\revolut-1.0-SNAPSHOT.jar //will run application on port 8080

Implementations

This application has two impementations of services:

1. When datastore is represented as Map.
2. When datastore is represented as H2 (in-memory) database.

By default application starts in MAP mode (using Map as datastore). User can specify the mode when the programm is started:

1. SQL mode: java -jar revolut\target\revolut-1.0-SNAPSHOT.jar SQL

Api's

Description	Request	Path	Response	Example
Create new account with balance	POST	/account	JSON with info about account	Input: { "balance": 100 } Output: { "id": 1, "balance": 100}
Get account by id	GET	/account/{id}	JSON with info about account	Output: { "id": 1, "balance": 100}
Transfer money	POST	/transfer	JSON with info about transfer status	Input: { "fromId": 1, "toId": 2, "amount": 100 } Output: {Transfer Completed}

Example CURLs

curl -i -d "{ \"balance\": 100 }" --header "Content-Type: application/json" -X POST http://localhost:8080/account

curl -i -d "{\"fromId\": 1, \"toId\": 2, \"amount\": 100}" --header "Content-Type: application/json" -X POST http://localhost:8080/transfer

curl -i --header "Content-Type: application/json" -X GET http://localhost:8080/account/2

The possible exceptions:

1. In case the account doesn't exists (int get account or transfer REST calls) the "Account with id = {id} wasn't found" will be displayed;
2. In case transfer is happening to the same account the "Can't transfer the money to the same account." will be displayed;
3. In case the balance on the fromAccount is less than the required amout the "Account with id = {id} doesn't have enough balance to transfer this amount = {amount}" will be displayed;