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// Copyright 2022 The Matrix.org Foundation C.I.C.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package rooms
import (
"context"
"sync"
"time"
"github.com/matrix-org/dendrite/cmd/dendrite-demo-pinecone/defaults"
"github.com/matrix-org/dendrite/federationapi/api"
"github.com/matrix-org/gomatrixserverlib"
"github.com/matrix-org/gomatrixserverlib/fclient"
"github.com/matrix-org/util"
pineconeRouter "github.com/matrix-org/pinecone/router"
pineconeSessions "github.com/matrix-org/pinecone/sessions"
)
type PineconeRoomProvider struct {
r *pineconeRouter.Router
s *pineconeSessions.Sessions
fedSender api.FederationInternalAPI
fedClient *fclient.FederationClient
}
func NewPineconeRoomProvider(
r *pineconeRouter.Router,
s *pineconeSessions.Sessions,
fedSender api.FederationInternalAPI,
fedClient *fclient.FederationClient,
) *PineconeRoomProvider {
p := &PineconeRoomProvider{
r: r,
s: s,
fedSender: fedSender,
fedClient: fedClient,
}
return p
}
func (p *PineconeRoomProvider) Rooms() []fclient.PublicRoom {
list := map[gomatrixserverlib.ServerName]struct{}{}
for k := range defaults.DefaultServerNames {
list[k] = struct{}{}
}
for _, k := range p.r.Peers() {
list[gomatrixserverlib.ServerName(k.PublicKey)] = struct{}{}
}
return bulkFetchPublicRoomsFromServers(
context.Background(), p.fedClient,
gomatrixserverlib.ServerName(p.r.PublicKey().String()), list,
)
}
// bulkFetchPublicRoomsFromServers fetches public rooms from the list of homeservers.
// Returns a list of public rooms.
func bulkFetchPublicRoomsFromServers(
ctx context.Context, fedClient *fclient.FederationClient,
origin gomatrixserverlib.ServerName,
homeservers map[gomatrixserverlib.ServerName]struct{},
) (publicRooms []fclient.PublicRoom) {
limit := 200
// follow pipeline semantics, see https://blog.golang.org/pipelines for more info.
// goroutines send rooms to this channel
roomCh := make(chan fclient.PublicRoom, int(limit))
// signalling channel to tell goroutines to stop sending rooms and quit
done := make(chan bool)
// signalling to say when we can close the room channel
var wg sync.WaitGroup
wg.Add(len(homeservers))
// concurrently query for public rooms
reqctx, reqcancel := context.WithTimeout(ctx, time.Second*5)
for hs := range homeservers {
go func(homeserverDomain gomatrixserverlib.ServerName) {
defer wg.Done()
util.GetLogger(reqctx).WithField("hs", homeserverDomain).Info("Querying HS for public rooms")
fres, err := fedClient.GetPublicRooms(reqctx, origin, homeserverDomain, int(limit), "", false, "")
if err != nil {
util.GetLogger(reqctx).WithError(err).WithField("hs", homeserverDomain).Warn(
"bulkFetchPublicRoomsFromServers: failed to query hs",
)
return
}
for _, room := range fres.Chunk {
// atomically send a room or stop
select {
case roomCh <- room:
case <-done:
case <-reqctx.Done():
util.GetLogger(reqctx).WithError(err).WithField("hs", homeserverDomain).Info("Interrupted whilst sending rooms")
return
}
}
}(hs)
}
select {
case <-time.After(5 * time.Second):
default:
wg.Wait()
}
reqcancel()
close(done)
close(roomCh)
for room := range roomCh {
publicRooms = append(publicRooms, room)
}
return publicRooms
}
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