Pravega client currently implements the following serializers by default io.pravega.client.stream.impl.UTF8StringSerializer, io.pravega.client.stream.impl.ByteArraySerializer, io.pravega.client.stream.impl.ByteBufferSerializer and io.pravega.client.stream.impl.JavaSerializer. It does not support any other form of serialization or serializers to enable compression. This is to avoid forcing unwanted dependencies on the user application.
To solve this pravega-serializer repository creates different gradle build targets to generate specific artifacts for serializers which depend on external dependencies. These specialized Pravega serializers depend on a specific type of serializer thereby ensuring no unwanted transitive dependencies are forced on the user application.
The project structure is described below.
pravega-serializer
|---- gson (This supports Json based serializers)
|---- avro
|---- customer serializer
Each sub module will generate a serailizer specific artifact which would depend on the pravaga-client and the specific external serializer libraries.
Adding a dependency on a specific serializer by the user application in the build system like gradle / maven / ant.
e.g: pravega-serializer-json:x.y.z will result in the pravega-client:x.y.z being downloaded as part of the transitive dependency along with the serializer specific libraries.