* Most Bridge V1 HTTP API calls are now compatible with Bridge V2
* Local topics works for Bridge V2 now
* A lot of work on trying to get the old Kafka producer test suite
to work after the refactorings
This commit is the beginning of an effort to split bridges into a
connector part and a bridge part.
Several bridges should be able to share a connector pool defined by a
single connector. The connectors should be possible to enable and
disable similar to how one can disable and enable bridges. There should
also be an API for checking the status of a connector and for
add/edit/delete connectors similar to the current bridge API.
Issues:
https://emqx.atlassian.net/browse/EMQX-10805
Fixes https://emqx.atlassian.net/browse/EMQX-10629
During health checking, we check whether tables in the SQL statement
exist. Such check was done by asking the backend to parse the
statement using a named prepared statements. Concurrent health checks
could then result in the error:
```erlang
{error,{error,error,<<"42P05">>,duplicate_prepared_statement,<<"prepared statement \"get_status\" already exists">>,[{file,<<"prepare.c">>},{line,<<"451">>},{routine,<<"StorePreparedStatement">>},{severity,<<"ERROR">>}]}}
```
This could lead to an inconsistent state in the driver process, which
would crash later when a message from the backend (`READY_FOR_QUERY`, "idle"):
```
2023-07-24T13:05:58.892043+00:00 [error] Generic server <0.2134.0> terminating. Reason: {'module could not be loaded',[{undefined,handle_message,[90,<<"I">>,...
```
Added calls to `epgsql:sync/1` for functions that could return
`{error, sync_required}`.
Also, redundant calls to `parse2` were removed to reduce the number of requests.
Fixes https://emqx.atlassian.net/browse/EMQX-10405
The problem here was that, for async requests, ehttpc responses of the form `{ok, 4__, _,
_}` and similar were being treated as successes.
Fixes https://emqx.atlassian.net/browse/EMQX-9603
Rather than relying on a JWT worker to produce and refresh tokens, we
could just produce then on demand when pushing the messages to GCP
PubSub. That can generate a bit of extra work (as multiple processes
might realize it’s time to refresh the JWT and do so), but that
shouldn’t be much. In return, we avoid any possibility of not having
a fresh JWT when pushing messages.
