Projects & Case Studies
Real-world projects: payment gateway microservices, full-stack apps, Django backends, RAG systems and more.
PaymentGatewayApplication.java
PaymentGatewayApplication.java — java source code from the Bridget learning materials (Bridget/payment-gateway-challenge-java/src/main/java/com/checkout/payment/gateway/PaymentGatewayApplication.java).
Read article →ApplicationConfiguration.java
ApplicationConfiguration.java — java source code from the Bridget learning materials (Bridget/payment-gateway-challenge-java/src/main/java/com/checkout/payment/gateway/configuration/ApplicationConfiguration.java).
Read article →RequestResponseLogger.java
RequestResponseLogger.java — java source code from the Bridget learning materials (Bridget/payment-gateway-challenge-java/src/main/java/com/checkout/payment/gateway/configuration/RequestResponseLogger.java).
Read article →PaymentGatewayController.java
PaymentGatewayController.java — java source code from the Bridget learning materials (Bridget/payment-gateway-challenge-java/src/main/java/com/checkout/payment/gateway/controller/PaymentGatewayController.java).
Read article →PaymentStatus.java
PaymentStatus.java — java source code from the Bridget learning materials (Bridget/payment-gateway-challenge-java/src/main/java/com/checkout/payment/gateway/enums/PaymentStatus.java).
Read article →BankErrorException.java
BankErrorException.java — java source code from the Bridget learning materials (Bridget/payment-gateway-challenge-java/src/main/java/com/checkout/payment/gateway/exception/BankErrorException.java).
Read article →CommonExceptionHandler.java
CommonExceptionHandler.java — java source code from the Bridget learning materials (Bridget/payment-gateway-challenge-java/src/main/java/com/checkout/payment/gateway/exception/CommonExceptionHandler.java).
Read article →EventProcessingException.java
EventProcessingException.java — java source code from the Bridget learning materials (Bridget/payment-gateway-challenge-java/src/main/java/com/checkout/payment/gateway/exception/EventProcessingException.java).
Read article →BankPaymentRequest.java
BankPaymentRequest.java — java source code from the Bridget learning materials (Bridget/payment-gateway-challenge-java/src/main/java/com/checkout/payment/gateway/model/BankPaymentRequest.java).
Read article →BankPaymentResponse.java
BankPaymentResponse.java — java source code from the Bridget learning materials (Bridget/payment-gateway-challenge-java/src/main/java/com/checkout/payment/gateway/model/BankPaymentResponse.java).
Read article →ErrorResponse.java
ErrorResponse.java — java source code from the Bridget learning materials (Bridget/payment-gateway-challenge-java/src/main/java/com/checkout/payment/gateway/model/ErrorResponse.java).
Read article →GetPaymentResponse.java
GetPaymentResponse.java — java source code from the Bridget learning materials (Bridget/payment-gateway-challenge-java/src/main/java/com/checkout/payment/gateway/model/GetPaymentResponse.java).
Read article →PaymentMapper.java
PaymentMapper.java — java source code from the Bridget learning materials (Bridget/payment-gateway-challenge-java/src/main/java/com/checkout/payment/gateway/model/PaymentMapper.java).
Read article →PostPaymentRequest.java
PostPaymentRequest.java — java source code from the Bridget learning materials (Bridget/payment-gateway-challenge-java/src/main/java/com/checkout/payment/gateway/model/PostPaymentRequest.java).
Read article →PostPaymentResponse.java
PostPaymentResponse.java — java source code from the Bridget learning materials (Bridget/payment-gateway-challenge-java/src/main/java/com/checkout/payment/gateway/model/PostPaymentResponse.java).
Read article →PaymentsRepository.java
PaymentsRepository.java — java source code from the Bridget learning materials (Bridget/payment-gateway-challenge-java/src/main/java/com/checkout/payment/gateway/repository/PaymentsRepository.java).
Read article →PaymentGatewayService.java
PaymentGatewayService.java — java source code from the Bridget learning materials (Bridget/payment-gateway-challenge-java/src/main/java/com/checkout/payment/gateway/service/PaymentGatewayService.java).
Read article →ExpiryDateValidator.java
ExpiryDateValidator.java — java source code from the Bridget learning materials (Bridget/payment-gateway-challenge-java/src/main/java/com/checkout/payment/gateway/validation/ExpiryDateValidator.java).
Read article →ValidExpiryDate.java
ValidExpiryDate.java — java source code from the Bridget learning materials (Bridget/payment-gateway-challenge-java/src/main/java/com/checkout/payment/gateway/validation/ValidExpiryDate.java).
Read article →PaymentGatewayControllerTest.java
PaymentGatewayControllerTest.java — java source code from the Bridget learning materials (Bridget/payment-gateway-challenge-java/src/test/java/com/checkout/payment/gateway/controller/PaymentGatewayControllerTest.java).
Read article →PaymentGatewayServiceTest.java
PaymentGatewayServiceTest.java — java source code from the Bridget learning materials (Bridget/payment-gateway-challenge-java/src/test/java/com/checkout/payment/gateway/service/PaymentGatewayServiceTest.java).
Read article →01-create-databases.sql
01-create-databases.sql — sql source code from the Bridget learning materials (Bridget/payment-gateway-microservices/infra/postgres-init/01-create-databases.sql).
Read article →ApiGatewayApplication.java
ApiGatewayApplication.java — java source code from the Bridget learning materials (Bridget/payment-gateway-microservices/services/api-gateway/src/main/java/com/checkout/paymentgw/gateway/ApiGatewayApplication.java).
Read article →CorrelationIdFilter.java
CorrelationIdFilter.java — java source code from the Bridget learning materials (Bridget/payment-gateway-microservices/services/api-gateway/src/main/java/com/checkout/paymentgw/gateway/filter/CorrelationIdFilter.java).
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