This required untangling logic from App.hs.
Building/rejecting a plan no longer consumes a pool connection.
* Added io test for failed resource embedding not consuming connection
* optionalrollback to Query.hs and Response.hs
* delete Middleware module
* remove plan logic from App.hs
* remove RequestContext
* remove pkCols logic from App.hs
* remove proc logic from App.hs
* remove config logic from handleRequest
The configuration option db-pool-acquisition-timeout
specifies the time in seconds to wait for the pool to
free up a connection slot. Otherwise, a 504 error is
returned. By default, there is no timeout.
This version of hasql-pool is a simplified rewrite that doesn't use
the resource-pool package. The major API changes are that idle
connections are no longer timed out (and the corresponding setting
is gone), and that `release` makes the pool unusable, where it used
to remain usable and only flushed idle connections.
We depend on a PostgREST fork of 0.7.2 that gives us reliable
flushing, compare https://github.com/PostgREST/hasql-pool/pull/1
- hasql-pool 0.7 removes timing out of idle connections, so
this change removes the db-pool-timeout option.
Given that we were typically running with very high
timeout settings, I don't anticipate the lack of timeout
to introduce new issues, though we might want to consider
introducing some retry-logic down the line when we
encounter connection failures.
- See https://github.com/PostgREST/postgrest/issues/2422 for a
discussion on depending on a forked dependency. Besides adding
the dependency to the nix overlay, we're also adding it to
stack.yaml and a new cabal.project to allow stack/cabal users
to build the project.
The original test no longer makes sense once we drop pool timeouts
with the hasql-pool upgrade.
To somehow test that new connections have the settings, convert it
to flush the pool instead.
The new tests verify that:
- statement_timeout on the authenticator role works to cancel slow statements
- changes to statement_timeout take effect on SIGUSR1
This reuses the old "limited_authenticator" role and adds some plumbing to
allow reliably changing the statement timeout even if the current role is
not functional due to a low statement timeout, and to make tests that modify
the role independent from each other.
- introduce module-wide metapostgrest fixture to have an out-of-band way to
manipulate the database, without having to spin up extra postgrest instances
per test
- reset statement_timeout at the start of the respective tests
steve-chavez