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Refactor appservices component (#2687)

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This PR refactors the app services component. It makes the following changes:

* Each appservice now gets its own NATS JetStream consumer
* The appservice database is now removed entirely, since we just use JetStream as a data source instead
* The entire component is now much simpler and we deleted lots of lines of code 💅

The result is that it should be much lighter and hopefully much more performant.
This commit is contained in:
Neil Alexander 2022-09-01 09:20:40 +01:00 • committed by GitHub
parent 175f65407a
commit ad6b902b84
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26 changed files with 231 additions and 1518 deletions
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55
appservice/appservice.go
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@ -18,7 +18,6 @@ import (
"context"
"crypto/tls"
"net/http"
"sync"
"time"
"github.com/gorilla/mux"
@ -28,9 +27,6 @@ import (
"github.com/matrix-org/dendrite/appservice/consumers"
"github.com/matrix-org/dendrite/appservice/inthttp"
"github.com/matrix-org/dendrite/appservice/query"
"github.com/matrix-org/dendrite/appservice/storage"
"github.com/matrix-org/dendrite/appservice/types"
"github.com/matrix-org/dendrite/appservice/workers"
roomserverAPI "github.com/matrix-org/dendrite/roomserver/api"
"github.com/matrix-org/dendrite/setup/base"
"github.com/matrix-org/dendrite/setup/config"
@ -59,57 +55,40 @@ func NewInternalAPI(
Proxy: http.ProxyFromEnvironment,
},
}
js, _ := base.NATS.Prepare(base.ProcessContext, &base.Cfg.Global.JetStream)
// Create appserivce query API with an HTTP client that will be used for all
// outbound and inbound requests (inbound only for the internal API)
appserviceQueryAPI := &query.AppServiceQueryAPI{
HTTPClient: client,
Cfg: &base.Cfg.AppServiceAPI,
}
// Create a connection to the appservice postgres DB
appserviceDB, err := storage.NewDatabase(base, &base.Cfg.AppServiceAPI.Database)
if err != nil {
logrus.WithError(err).Panicf("failed to connect to appservice db")
if len(base.Cfg.Derived.ApplicationServices) == 0 {
return appserviceQueryAPI
}
// Wrap application services in a type that relates the application service and
// a sync.Cond object that can be used to notify workers when there are new
// events to be sent out.
workerStates := make([]types.ApplicationServiceWorkerState, len(base.Cfg.Derived.ApplicationServices))
for i, appservice := range base.Cfg.Derived.ApplicationServices {
m := sync.Mutex{}
ws := types.ApplicationServiceWorkerState{
AppService: appservice,
Cond: sync.NewCond(&m),
}
workerStates[i] = ws
for _, appservice := range base.Cfg.Derived.ApplicationServices {
// Create bot account for this AS if it doesn't already exist
if err = generateAppServiceAccount(userAPI, appservice); err != nil {
if err := generateAppServiceAccount(userAPI, appservice); err != nil {
logrus.WithFields(logrus.Fields{
"appservice": appservice.ID,
}).WithError(err).Panicf("failed to generate bot account for appservice")
}
}
// Create appserivce query API with an HTTP client that will be used for all
// outbound and inbound requests (inbound only for the internal API)
appserviceQueryAPI := &query.AppServiceQueryAPI{
HTTPClient: client,
Cfg: base.Cfg,
}
// Only consume if we actually have ASes to track, else we'll just chew cycles needlessly.
// We can't add ASes at runtime so this is safe to do.
if len(workerStates) > 0 {
consumer := consumers.NewOutputRoomEventConsumer(
base.ProcessContext, base.Cfg, js, appserviceDB,
rsAPI, workerStates,
)
if err := consumer.Start(); err != nil {
logrus.WithError(err).Panicf("failed to start appservice roomserver consumer")
}
js, _ := base.NATS.Prepare(base.ProcessContext, &base.Cfg.Global.JetStream)
consumer := consumers.NewOutputRoomEventConsumer(
base.ProcessContext, &base.Cfg.AppServiceAPI,
client, js, rsAPI,
)
if err := consumer.Start(); err != nil {
logrus.WithError(err).Panicf("failed to start appservice roomserver consumer")
}
// Create application service transaction workers
if err := workers.SetupTransactionWorkers(client, appserviceDB, workerStates); err != nil {
logrus.WithError(err).Panicf("failed to start app service transaction workers")
}
return appserviceQueryAPI
}