Conn

class

class Conn

Bases: DescriptorBase, ABC

Categories: spi

Abstract base for every connection.

Concrete subclasses live in the connector packages (e.g. S3SrcConn, MySQLConn) and declare their own uri / credentials / conn_cfg fields. A connection is never declared on a flow function; it is registered on the function's collection and the runtime resolves it and hands it to the connector's plugin (read_in / write_out / run) at run time. Subclasses share the "connectionDef" __kind__ and must not redefine it (they are told apart by their envelope type).