Allow schema cache reloading with NOTIFY (#1542)

Fixes https://github.com/PostgREST/postgrest/issues/1512

Helps on environments where you can't send unix signals(Windows, managed
containers). Also provides better UX for schema reloads - NOTIFY
can be sent from pg clients(psql, pgadmin).

`NOTIFY pgrst` - with no payload - should be done to reload the schema cache.
Notifications with a payload will be ignored.

The channel can be enabled with `db-channel-enabled`(false by default)
and its name can be configured with `db-channel`.

The LISTEN thread uses a dedicated pg connection.
This connection is recovered if it fails.
A debounce of 1ms is done in case too many NOTIFYs arrive.

This commit is contained in:

Steve Chavez

2020-06-24 19:00:02 -05:00

committed by

GitHub

parent 24064f8626

commit 43d71e95ac

13 changed files with 169 additions and 57 deletions

									
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				@@ -267,6 +267,8 @@ workflows:

				          filters:

				            tags:

				              only: /v[0-9]+(\.[0-9]+)*/

				          requires:

				            - nix-build

				      - release:

				          requires:

				            - style-check