io.r2dbc.postgresql.extension

Interface CodecRegistrar

All Superinterfaces:

Extension

All Known Implementing Classes:

BuiltinDynamicCodecs

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

@FunctionalInterface
public interface CodecRegistrar
extends Extension

Registrar interface that is used to register Codecs as extension to built-in codecs.

Implementations may use PostgresqlConnection to query Postgres information schema to discover type details such as extension type OIDs.

Constructor Requirements

Extension implementations must have a default constructor if registered via the ServiceLoader. When registered through PostgresqlConnectionConfiguration the default constructor is not required to be public. When registered via the ServiceLoader the default constructor must be public.

See Also:

Extension

Method Summary

Modifier and Type	Method and Description
Publisher<Void>	register(PostgresqlConnection connection, io.netty.buffer.ByteBufAllocator allocator, CodecRegistry registry) Register Codec into CodecRegistry.

Method Detail

register

Publisher<Void> register(PostgresqlConnection connection,
                         io.netty.buffer.ByteBufAllocator allocator,
                         CodecRegistry registry)

Register Codec into CodecRegistry. Codecs should be registered using a deferred approach upon subscription.

Parameters:

connection - the connection to query the connected Postgres runtime instance

allocator - the allocator for buffer allocation

registry - target codec registry that accepts codec registrations

Returns:

a Publisher that activates codec registration upon subscription