hex-thai-star

Note on Booking out adapters

The Booking subdomain has the following DB-Related out adapters implemented:

• JPA adapter (see booking/booking-adapter-out-jpa),
• JDBI adapter (see booking/booking-adapter-out-jdbi),
• DynamoDB adapter (see booking/booking-adapter-out-dynamodb).

The first two above-mentioned adapters can be used to access a relational database (e.g. MySQL, PostgreSQL, etc.) and are mapping onto the same database structure. The latter adapter is tight to a specific database product - DynamoDB which is a NoSQL database.

Note on Booking in adapters

The Booking subdomain has the following REST-related in adapters implemented:

• Spring Web MVC (see booking/booking-adapter-in-springweb),
• JAX-RS API with RESTEasy implementation provided by Quarkus (see booking/booking-adapter-in-quarkusweb),
• AWS Lambda adapter (see booking/booking-adapter-out-awslambda).

Note on how Booking can be run, that is, available configurations

The Booking (micro)service / app can be started using the following configurations:

• Spring Boot application (see configuration/springboot) combines the following adapters:

  • Spring Web MVC
  • JPA adapter. This can be changed by using jdbi Spring profile - then the jdbi implementation will be used. It is noteworthy, that jdbi implementation still uses auto ddl code from jpa - it is okay for time being as we do not have Liquibase/Flyway solution in place (yet).

• Quarkus application (see configuration/quarkus) combines the following adapters:

  • JAX-RS
  • JPA adapter

• AWS Lambda application (see configuration/awslambda) combines the following adapters:

  • AWS Lambda
  • DynamoDB

  The automatic deployment to AWS is implemented using the Serverless Framework and the CircleCI platform. The Booking service (its Table endpoint) is available here. Be patient: the cold start takes about 6 seconds while the hot one about 0.3 seconds.

• Quarkus on AWS Lambda application (see configuration/quarkus-awslambda) combines the following adapters:

  • JAX-RS
  • DynamoDB

  This is in fact a Quarkus application which uses the quarkus-amazon-lambda-http and quarkus-amazon-dynamodb extensions. During the build on the CircleCI platform, the Quarkus app is built with with GraalVM and the native executable is then deployed using the Serverless Framework. The Booking service (its Table endpoint) is available here. Now the cold start takes about 1 second while the hot one is more or less the same.