mrproliu commented on code in PR #995:
URL:
https://github.com/apache/skywalking-banyandb/pull/995#discussion_r2909954608
##########
banyand/metadata/schema/property/client.go:
##########
@@ -1063,260 +994,345 @@ func (r *SchemaRegistry) syncLoop(ctx context.Context)
{
case <-r.closer.CloseNotify():
return
case <-ticker.C:
- r.performSync(ctx)
+ r.syncRound++
+ if r.syncRound%r.fullReconcileEvery == 0 {
+ r.l.Debug().Uint64("round",
r.syncRound).Msg("syncLoop: starting full reconcile")
+ r.performFullSync(ctx)
+ } else {
+ r.l.Debug().Uint64("round",
r.syncRound).Msg("syncLoop: starting incremental sync")
+ r.performIncrementalSync(ctx)
+ }
}
}
}
-func (r *SchemaRegistry) performSync(ctx context.Context) {
- round := atomic.AddUint64(&r.syncRound, 1)
- isFullReconcile := r.shouldFullReconcile(round)
- names := r.connMgr.ActiveNames()
- if len(names) == 0 {
- r.l.Debug().Uint64("round", round).Msg("performSync: no active
connections, skipping")
- return
+func (r *SchemaRegistry) launchWatch(nodeName string, client *schemaClient) {
+ r.watchMu.Lock()
+ defer r.watchMu.Unlock()
+ if old, exists := r.watchSessions[nodeName]; exists {
+ r.l.Debug().Str("node", nodeName).Msg("launchWatch: closing
existing watch session")
+ old.cancelFn()
+ delete(r.watchSessions, nodeName)
+ }
+ ctx, cancel := context.WithCancel(r.closer.Ctx())
+ session := &watchSession{
+ cancelFn: cancel,
+ syncReqCh: make(chan *syncRequest, 1),
+ syncResCh: make(chan []*digestEntry, 1),
}
- r.l.Debug().Uint64("round", round).Bool("fullReconcile",
isFullReconcile).
- Int("activeNodes", len(names)).Msg("performSync: starting")
- collector := newSyncCollector()
- if isFullReconcile {
- r.collectFullSync(ctx, collector)
+ r.watchSessions[nodeName] = session
+ r.l.Debug().Str("node", nodeName).Msg("launchWatch: starting new watch
session")
+ if r.closer.AddRunning() {
+ go func() {
+ defer r.closer.Done()
+ r.watchLoop(ctx, nodeName, client.update, session)
+ }()
} else {
- r.collectIncrementalSync(ctx, collector)
+ cancel()
+ delete(r.watchSessions, nodeName)
}
- r.l.Debug().Uint64("round", round).Int("collectedKinds",
len(collector.entries)).Msg("performSync: reconciling")
- r.reconcileFromCollector(collector)
}
-func (r *SchemaRegistry) collectFullSync(ctx context.Context, collector
*syncCollector) {
- kindsToSync := r.getKindsToSync()
- if len(kindsToSync) == 0 {
- return
- }
- broadcastErr := r.broadcastAll(func(nodeName string, sc *schemaClient)
error {
- for _, kind := range kindsToSync {
- query := buildSchemaQuery(kind, "", "", 0)
- schemas, queryErr := r.querySchemasFromClient(ctx,
sc.management, query)
- if queryErr != nil {
- return fmt.Errorf("failed to query schemas for
full sync for kind: %s", kind)
- }
- if r.l.Debug().Enabled() {
- activeSchemas := 0
- deletedSchemas := 0
- for _, s := range schemas {
- if s.deleteTime > 0 {
- deletedSchemas++
- continue
- }
- activeSchemas++
- }
- r.l.Debug().Stringer("kind", kind).Str("node",
nodeName).
- Int("schemas", len(schemas)).
- Int("activeSchemas", activeSchemas).
- Int("deletedSchemas", deletedSchemas).
- Msg("collectFullSync: collected")
- }
- collector.add(nodeName, kind, schemas)
- }
- return nil
- })
- if broadcastErr != nil {
- r.l.Error().Err(broadcastErr).Msg("failed to collect full sync
from some nodes")
+func (r *SchemaRegistry) stopWatch(nodeName string) {
+ r.watchMu.Lock()
+ defer r.watchMu.Unlock()
+ if session, exists := r.watchSessions[nodeName]; exists {
+ r.l.Debug().Str("node", nodeName).Msg("stopWatch: canceling
watch session")
+ session.cancelFn()
+ delete(r.watchSessions, nodeName)
}
}
-func (r *SchemaRegistry) collectIncrementalSync(ctx context.Context, collector
*syncCollector) {
- sinceRevision := r.cache.GetMaxRevision()
- r.l.Debug().Int64("sinceRevision",
sinceRevision).Msg("collectIncrementalSync: querying updates")
- broadcastErr := r.broadcastAll(func(nodeName string, sc *schemaClient)
error {
- updatedKindNames, queryErr := r.queryUpdatedSchemas(ctx,
sc.update, sinceRevision)
- if queryErr != nil {
- return queryErr
+const (
+ watchInitialBackoff = time.Second
+ watchMaxBackoff = 30 * time.Second
+)
+
+func (r *SchemaRegistry) watchLoop(ctx context.Context, nodeName string,
+ updateClient schemav1.SchemaUpdateServiceClient, session *watchSession,
+) {
+ backoff := watchInitialBackoff
+ for {
+ select {
+ case <-ctx.Done():
+ return
+ default:
}
- r.l.Debug().Str("node", nodeName).Int("updatedKinds",
len(updatedKindNames)).
- Strs("kinds",
updatedKindNames).Msg("collectIncrementalSync: got updates")
- for _, kindName := range updatedKindNames {
- kind, kindErr := KindFromString(kindName)
- if kindErr != nil {
- r.l.Warn().Str("kindName",
kindName).Msg("unknown kind from aggregate update")
- continue
- }
- query := buildSchemaQuery(kind, "", "", sinceRevision)
- schemas, schemasErr := r.querySchemasFromClient(ctx,
sc.management, query)
- if schemasErr != nil {
- return fmt.Errorf("failed to query updated
schemas for kind %s: %w", kind, schemasErr)
+ err := r.processWatchSession(ctx, updateClient, session)
+ if err != nil {
+ st, ok := status.FromError(err)
+ if ok && st.Code() == codes.Unimplemented {
+ r.l.Debug().Str("node", nodeName).Msg("watch:
server does not support WatchSchemas, stopping watch")
+ return
}
- r.l.Debug().Stringer("kind", kind).Str("node",
nodeName).
- Int("schemas",
len(schemas)).Msg("collectIncrementalSync: collected")
- collector.add(nodeName, kind, schemas)
+ r.l.Warn().Err(err).Str("node",
nodeName).Dur("backoff", backoff).Msg("watch stream disconnected, will retry")
+ }
+ select {
+ case <-ctx.Done():
+ return
+ case <-time.After(backoff):
+ }
+ backoff *= 2
+ if backoff > watchMaxBackoff {
+ backoff = watchMaxBackoff
}
- return nil
- })
- if broadcastErr != nil {
- r.l.Error().Err(broadcastErr).Msg("failed to collect
incremental sync from some nodes")
}
}
-func (r *SchemaRegistry) reconcileFromCollector(collector *syncCollector) {
- for kind, propMap := range collector.entries {
- cachedEntries := r.cache.GetEntriesByKind(kind)
- seen := make(map[string]bool, len(propMap))
- for propID, s := range propMap {
- seen[propID] = true
- if s.deleteTime > 0 {
- if entry, exists := cachedEntries[propID];
exists {
- r.handleDeletion(kind, propID, entry,
s.deleteTime)
+func (r *SchemaRegistry) processWatchSession(ctx context.Context,
+ updateClient schemav1.SchemaUpdateServiceClient, session *watchSession,
+) error {
+ stream, err := updateClient.WatchSchemas(ctx)
+ if err != nil {
+ return err
+ }
+
+ maxRev := r.cache.GetMaxRevision()
+ r.l.Debug().Int64("maxRevision", maxRev).Msg("processWatchSession:
sending initial replay request")
+ initReq := &schemav1.WatchSchemasRequest{
+ Criteria: buildRevisionCriteria(maxRev),
+ }
+ if sendErr := stream.Send(initReq); sendErr != nil {
+ return sendErr
+ }
+
+ recvCh := make(chan *schemav1.WatchSchemasResponse, 64)
+ recvErrCh := make(chan error, 1)
+ go func() {
+ for {
+ resp, recvErr := stream.Recv()
+ if recvErr != nil {
+ recvErrCh <- recvErr
+ close(recvCh)
+ return
+ }
+ recvCh <- resp
+ }
+ }()
+
+ var inSync bool
+ var metadataOnly bool
+ var digests []*digestEntry
+
+ for {
+ select {
+ case <-ctx.Done():
+ return ctx.Err()
+ case err := <-recvErrCh:
+ return err
+ case req := <-session.syncReqCh:
+ r.l.Debug().Bool("metadataOnly", len(req.tagProjection)
> 0).
+ Bool("hasCriteria", req.criteria !=
nil).Msg("processWatchSession: sending sync request")
+ if sendErr := stream.Send(&schemav1.WatchSchemasRequest{
+ Criteria: req.criteria,
+ TagProjection: req.tagProjection,
+ }); sendErr != nil {
+ return sendErr
+ }
+ inSync = true
+ metadataOnly = len(req.tagProjection) > 0
+ digests = nil
+ case resp, ok := <-recvCh:
+ if !ok {
+ return <-recvErrCh
+ }
+ if resp.EventType ==
schemav1.SchemaEventType_SCHEMA_EVENT_TYPE_REPLAY_DONE {
+ r.l.Debug().Bool("inSync",
inSync).Msg("processWatchSession: received REPLAY_DONE")
+ if inSync {
+ r.l.Debug().Int("digestCount",
len(digests)).Msg("processWatchSession: sync replay completed, sending digests")
+ session.syncResCh <- digests
+ digests = nil
+ inSync = false
+ metadataOnly = false
}
continue
}
- md, convErr := ToSchema(kind, s.property)
- if convErr != nil {
- r.l.Warn().Err(convErr).Str("propID",
propID).Msg("failed to convert property for reconcile")
- continue
+ if inSync && metadataOnly {
+ digests = append(digests, r.parseDigest(resp))
+ } else {
+ r.handleWatchEvent(resp)
}
- r.processInitialResourceFromProperty(kind, s.property,
md.Spec.(proto.Message))
}
}
}
-func (r *SchemaRegistry) getKindsToSync() []schema.Kind {
- r.mux.RLock()
- handlerKindSet := make(map[schema.Kind]struct{}, len(r.handlers))
- for kind := range r.handlers {
- handlerKindSet[kind] = struct{}{}
- }
- r.mux.RUnlock()
- for _, kind := range r.cache.GetCachedKinds() {
- handlerKindSet[kind] = struct{}{}
- }
- kinds := make([]schema.Kind, 0, len(handlerKindSet))
- for kind := range handlerKindSet {
- kinds = append(kinds, kind)
+func (r *SchemaRegistry) parseDigest(resp *schemav1.WatchSchemasResponse)
*digestEntry {
+ prop := resp.GetProperty()
+ parsed := ParseTags(prop.GetTags())
+ return &digestEntry{
+ propID: prop.GetId(),
+ kind: parsed.Kind,
+ group: parsed.Group,
+ name: parsed.Name,
+ revision: parsed.UpdatedAt,
+ deleteTime: resp.GetDeleteTime(),
}
- return kinds
}
-func (r *SchemaRegistry) queryUpdatedSchemas(ctx context.Context, client
schemav1.SchemaUpdateServiceClient, sinceRevision int64) ([]string, error) {
- query := buildUpdatedSchemasQuery(sinceRevision)
- resp, rpcErr := client.AggregateSchemaUpdates(ctx,
&schemav1.AggregateSchemaUpdatesRequest{Query: query})
- if rpcErr != nil {
- return nil, rpcErr
+func (r *SchemaRegistry) handleWatchEvent(resp *schemav1.WatchSchemasResponse)
{
+ prop := resp.GetProperty()
+ if prop == nil {
+ return
+ }
+ parsed := ParseTags(prop.GetTags())
+ kindStr := parsed.Kind
+ if kindStr == "" {
+ kindStr = prop.GetMetadata().GetName()
+ }
+ kind, kindErr := KindFromString(kindStr)
+ if kindErr != nil {
+ r.l.Warn().Str("kind", kindStr).Msg("watch: unknown kind in
event")
+ return
+ }
+ r.l.Debug().Stringer("eventType", resp.GetEventType()).Stringer("kind",
kind).
+ Str("propID", prop.GetId()).Msg("watch: received event")
+ switch resp.GetEventType() {
+ case schemav1.SchemaEventType_SCHEMA_EVENT_TYPE_INSERT,
schemav1.SchemaEventType_SCHEMA_EVENT_TYPE_UPDATE:
+ md, convErr := ToSchema(kind, prop)
+ if convErr != nil {
+ r.l.Warn().Err(convErr).Stringer("kind",
kind).Msg("watch: failed to convert property")
+ return
+ }
+ r.processInitialResourceFromProperty(kind, prop,
md.Spec.(proto.Message))
+ case schemav1.SchemaEventType_SCHEMA_EVENT_TYPE_DELETE:
+ propID := prop.GetId()
+ if r.cache.Delete(propID, resp.GetDeleteTime()) {
+ md, convErr := ToSchema(kind, prop)
+ if convErr != nil {
+ r.l.Warn().Err(convErr).Stringer("kind",
kind).Msg("watch: failed to convert deleted property")
+ return
+ }
+ r.notifyHandlers(kind, md, true)
+ }
+ case schemav1.SchemaEventType_SCHEMA_EVENT_TYPE_REPLAY_DONE,
schemav1.SchemaEventType_SCHEMA_EVENT_TYPE_UNSPECIFIED:
+ // handled by processWatchSession, not expected here
}
- return resp.GetNames(), nil
}
-func (r *SchemaRegistry) shouldFullReconcile(round uint64) bool {
- return r.fullReconcileEvery > 0 && round%r.fullReconcileEvery == 0
+func (r *SchemaRegistry) performIncrementalSync(ctx context.Context) {
+ sessions := r.getActiveSessions()
+ if len(sessions) == 0 {
+ return
+ }
+ maxRev := r.cache.GetMaxRevision()
+ req := &syncRequest{
+ criteria: buildRevisionCriteria(maxRev),
+ }
+ r.l.Debug().Int64("maxRevision", maxRev).Msg("incremental sync:
requesting changes")
+ r.sendSyncRequest(ctx, sessions, req)
}
-type kindGroupPair struct {
- groupName string
- kind schema.Kind
+func (r *SchemaRegistry) getActiveSessions() map[string]*watchSession {
+ r.watchMu.Lock()
+ defer r.watchMu.Unlock()
+ sessions := make(map[string]*watchSession, len(r.watchSessions))
+ for name, s := range r.watchSessions {
+ sessions[name] = s
+ }
+ return sessions
}
-func (r *SchemaRegistry) initializeFromSchemaClient(ctx context.Context, sc
*schemaClient) error {
- groups, listErr := r.listGroupFromClient(ctx, sc.management)
- if listErr != nil {
- return listErr
- }
- var pairs []kindGroupPair
- for _, group := range groups {
- r.processInitialResource(schema.KindGroup, group)
- catalog := group.GetCatalog()
- groupName := group.GetMetadata().GetName()
- switch catalog {
- case commonv1.Catalog_CATALOG_STREAM:
- pairs = append(pairs,
- kindGroupPair{groupName: groupName, kind:
schema.KindStream},
- kindGroupPair{groupName: groupName, kind:
schema.KindIndexRule},
- kindGroupPair{groupName: groupName, kind:
schema.KindIndexRuleBinding},
- )
- case commonv1.Catalog_CATALOG_MEASURE:
- pairs = append(pairs,
- kindGroupPair{groupName: groupName, kind:
schema.KindMeasure},
- kindGroupPair{groupName: groupName, kind:
schema.KindTopNAggregation},
- kindGroupPair{groupName: groupName, kind:
schema.KindIndexRule},
- kindGroupPair{groupName: groupName, kind:
schema.KindIndexRuleBinding},
- )
- case commonv1.Catalog_CATALOG_TRACE:
- pairs = append(pairs,
- kindGroupPair{groupName: groupName, kind:
schema.KindTrace},
- kindGroupPair{groupName: groupName, kind:
schema.KindIndexRule},
- kindGroupPair{groupName: groupName, kind:
schema.KindIndexRuleBinding},
- )
- case commonv1.Catalog_CATALOG_PROPERTY:
- pairs = append(pairs, kindGroupPair{groupName:
groupName, kind: schema.KindProperty})
+func (r *SchemaRegistry) sendSyncRequest(ctx context.Context,
+ sessions map[string]*watchSession, req *syncRequest,
+) map[string][]*digestEntry {
+ r.l.Debug().Int("sessionCount", len(sessions)).Msg("sendSyncRequest:
dispatching to watch sessions")
+ for _, s := range sessions {
+ select {
+ case s.syncReqCh <- req:
default:
- r.l.Error().Stringer("catalog", catalog).Str("group",
groupName).Msg("unknown catalog type during initialization")
}
}
- var wg sync.WaitGroup
- for _, pair := range pairs {
- currentPair := pair
- wg.Add(1)
- go func() {
- defer wg.Done()
- r.initResourcesFromClient(ctx, sc.management,
currentPair.kind, currentPair.groupName)
- }()
+ allDigests := make(map[string][]*digestEntry, len(sessions))
+ for name, s := range sessions {
+ select {
+ case digests := <-s.syncResCh:
+ allDigests[name] = digests
+ case <-time.After(30 * time.Second):
+ r.l.Warn().Str("node", name).Msg("sync timeout")
+ case <-ctx.Done():
+ return nil
+ }
Review Comment:
Added a skip log when the channel is full.
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