ANZ Wholesale Engineering Sample Project (Backend Development)

The sample application being requested by the candidate to build the backend REST APIs needed to support a web application to that allows a user to view accounts and subsequently view transactions on any of the accounts they hold.

Acceptance Critera

Required functionality:

• View account list
• View account transactions

Assumptions

As UI is out of scope, I have decided to return purely JSON responses to restful get requests. As the account number format appears differently in the UI format, I have chosen String for this field. The dashes and formatters may or may not be of a designated format, so I left it to unrestricted String.

Technical notes

Using Spring Boot, jpa, service layer, reactive, flux/mono and j8 streams. No attempt was made to provide back pressure through the JPA repositories. You will see these streams are constructed by iterables. With more time, I would ensure back pressure on the repositories.. and use swagger for the API definitions.

Run

gradlew bootrun

API Usage

Access the local url :

Account List

http://localhost:8080/accountList

This will produce a JSON response :

[{"accountNumber":"585309209","accountName":"SGSavings726","accountType":"Savings","balanceDate":"2018-11-08T00:00:00.000+0000","currencyCode":"SGD","openingAvailableBalance":84327.51},{"accountNumber":"791066619","accountName":"AUSavings933","accountType":"Savings","balanceDate":"2018-11-08T00:00:00.000+0000","currencyCode":"AUD","openingAvailableBalance":88005.93},{"accountNumber":"321143048","accountName":"AUCurrent433","accountType":"Current","balanceDate":"2018-11-08T00:00:00.000+0000","currencyCode":"AUD","openingAvailableBalance":38010.62},{"accountNumber":"347546123","accountName":"SGCurrent166","accountType":"Current","balanceDate":"2018-11-08T00:00:00.000+0000","currencyCode":"SGD","openingAvailableBalance":50664.65},{"accountNumber":"680456441","accountName":"AUCurrent374","accountType":"Current","balanceDate":"2018-11-08T00:00:00.000+0000","currencyCode":"AUD","openingAvailableBalance":41327.28},{"accountNumber":"136151648","accountName":"AUCurrent938","accountType":"Savings","balanceDate":"2018-11-08T00:00:00.000+0000","currencyCode":"AUD","openingAvailableBalance":48928.79},{"accountNumber":"453489511","accountName":"SGSavings842","accountType":"Savings","balanceDate":"2018-11-08T00:00:00.000+0000","currencyCode":"SGD","openingAvailableBalance":72117.53},{"accountNumber":"334651897","accountName":"AUSavings253","accountType":"Savings","balanceDate":"2018-11-08T00:00:00.000+0000","currencyCode":"AUD","openingAvailableBalance":88005.93},{"accountNumber":"793445614","accountName":"AUCurrent754","accountType":"Current","balanceDate":"2018-11-08T00:00:00.000+0000","currencyCode":"AUD","openingAvailableBalance":20588.16},{"accountNumber":"768456461","accountName":"SGCurrent294","accountType":"Current","balanceDate":"2018-11-08T00:00:00.000+0000","currencyCode":"SGD","openingAvailableBalance":5906.55},{"accountNumber":"847498496","accountName":"AUCurrent591","accountType":"Current","balanceDate":"2018-11-08T00:00:00.000+0000","currencyCode":"AUD","openingAvailableBalance":925613.68}]

Transactions List

http://localhost:8080/transactions/{accountNumber}

Example http://localhost:8080/transactions/768456461

This will produce a JSON response :

[{"transactionId":37,"accountNumber":"768456461","accountName":"SGCurrent294","valueDate":"2012-01-12T00:00:00.000+0000","currencyCode":"SGD","debitAmount":0.00,"creditAmount":57791.02,"debitCredit":"Credit","transactionNarrative":"Some credit"},{"transactionId":38,"accountNumber":"768456461","accountName":"SGCurrent294","valueDate":"2012-01-12T00:00:00.000+0000","currencyCode":"SGD","debitAmount":0.00,"creditAmount":63170.05,"debitCredit":"Credit","transactionNarrative":"Some credit 2"},{"transactionId":39,"accountNumber":"768456461","accountName":"SGCurrent294","valueDate":"2012-01-12T00:00:00.000+0000","currencyCode":"SGD","debitAmount":45752.45,"creditAmount":0.00,"debitCredit":"Debit","transactionNarrative":"Some debit"},{"transactionId":40,"accountNumber":"768456461","accountName":"SGCurrent294","valueDate":"2012-01-12T00:00:00.000+0000","currencyCode":"SGD","debitAmount":15115.66,"creditAmount":0.00,"debitCredit":"Debit","transactionNarrative":"Some debit 2"}]

Build

gradlew build

Test

gradlew test