Ristretto cache (#2563)

* Try Ristretto cache

* Tweak

* It's beautiful

* Update GMSL

* More strict keyable interface

* Fix that some more

* Make less panicky

* Don't enforce mutability checks for now

* Determine mutability using deep equality

* Tweaks

* Namespace keys

* Make federation caches mutable

* Update cost estimation, add metric

* Update GMSL

* Estimate cost for metrics better

* Reduce counters a bit

* Try caching events

* Some guards

* Try again

* Try this

* Use separate caches for hopefully better hash distribution

* Fix bug with admitting events into cache

* Try to fix bugs

* Check nil

* Try that again

* Preserve order jeezo this is messy

* thanks VS Code for doing exactly the wrong thing

* Try this again

* Be more specific

* aaaaargh

* One more time

* That might be better

* Stronger sorting

* Cache expiries, async publishing of EDUs

* Put it back

* Use a shared cache again

* Cost estimation fixes

* Update ristretto

* Reduce counters a bit

* Clean up a bit

* Update GMSL

* 1GB

* Configurable cache sizees

* Tweaks

* Add `config.DataUnit` for specifying friendly cache sizes

* Various tweaks

* Update GMSL

* Add back some lazy loading caching

* Include key in cost

* Include key in cost

* Tweak max age handling, config key name

* Only register prometheus metrics if requested

* Review comments @S7evinK

* Don't return errors when creating caches (it is better just to crash since otherwise we'll `nil`-pointer exception everywhere)

* Review comments

* Update sample configs

* Update GHA Workflow

* Update Complement images to Go 1.18

* Remove the cache test from the federation API as we no longer guarantee immediate cache admission

* Don't check the caches in the renewal test

* Possibly fix the upgrade tests

* Update to matrix-org/gomatrixserverlib#322

* Update documentation to refer to Go 1.18

federationapi/routing/invite.go

@@ -26,6 +26,7 @@ import (
 	"github.com/matrix-org/dendrite/setup/config"
 	"github.com/matrix-org/gomatrixserverlib"
 	"github.com/matrix-org/util"
+	"github.com/sirupsen/logrus"
 )
 
 // InviteV2 implements /_matrix/federation/v2/invite/{roomID}/{eventID}
@@ -141,10 +142,17 @@ func processInvite(
 	}
 
 	// Check that the event is signed by the server sending the request.
-	redacted := event.Redact()
+	redacted, err := gomatrixserverlib.RedactEventJSON(event.JSON(), event.Version())
+	if err != nil {
+		logrus.WithError(err).Errorf("XXX: invite.go")
+		return util.JSONResponse{
+			Code: http.StatusBadRequest,
+			JSON: jsonerror.BadJSON("The event JSON could not be redacted"),
+		}
+	}
 	verifyRequests := []gomatrixserverlib.VerifyJSONRequest{{
 		ServerName:             event.Origin(),
-		Message:                redacted.JSON(),
+		Message:                redacted,
 		AtTS:                   event.OriginServerTS(),
 		StrictValidityChecking: true,
 	}}

federationapi/routing/join.go

@@ -266,10 +266,17 @@ func SendJoin(
 	}
 
 	// Check that the event is signed by the server sending the request.
-	redacted := event.Redact()
+	redacted, err := gomatrixserverlib.RedactEventJSON(event.JSON(), event.Version())
+	if err != nil {
+		logrus.WithError(err).Errorf("XXX: join.go")
+		return util.JSONResponse{
+			Code: http.StatusBadRequest,
+			JSON: jsonerror.BadJSON("The event JSON could not be redacted"),
+		}
+	}
 	verifyRequests := []gomatrixserverlib.VerifyJSONRequest{{
 		ServerName:             event.Origin(),
-		Message:                redacted.JSON(),
+		Message:                redacted,
 		AtTS:                   event.OriginServerTS(),
 		StrictValidityChecking: true,
 	}}

federationapi/routing/leave.go

@@ -231,10 +231,17 @@ func SendLeave(
 	}
 
 	// Check that the event is signed by the server sending the request.
-	redacted := event.Redact()
+	redacted, err := gomatrixserverlib.RedactEventJSON(event.JSON(), event.Version())
+	if err != nil {
+		logrus.WithError(err).Errorf("XXX: leave.go")
+		return util.JSONResponse{
+			Code: http.StatusBadRequest,
+			JSON: jsonerror.BadJSON("The event JSON could not be redacted"),
+		}
+	}
 	verifyRequests := []gomatrixserverlib.VerifyJSONRequest{{
 		ServerName:             event.Origin(),
-		Message:                redacted.JSON(),
+		Message:                redacted,
 		AtTS:                   event.OriginServerTS(),
 		StrictValidityChecking: true,
 	}}