oryx2 commented on a change in pull request #611:
URL: https://github.com/apache/pulsar-client-go/pull/611#discussion_r788329960
##########
File path: pulsar/consumer_partition.go
##########
@@ -143,10 +144,61 @@ type partitionConsumer struct {
dlq *dlqRouter
log log.Logger
-
+ providersMutex sync.RWMutex
compressionProviders sync.Map
//map[pb.CompressionType]compression.Provider
metrics *internal.LeveledMetrics
decryptor cryptointernal.Decryptor
+ schemaInfoCache *schemaInfoCache
+}
+
+type schemaInfoCache struct {
+ lock sync.RWMutex
+ cache map[string]Schema
+ client *client
+ topic string
+}
+
+func newSchemaInfoCache(client *client, topic string) *schemaInfoCache {
+ return &schemaInfoCache{
+ cache: make(map[string]Schema),
+ client: client,
+ topic: topic,
+ }
+}
+
+func (s *schemaInfoCache) Get(schemaVersion []byte) (schema Schema, err error)
{
+ key := hex.EncodeToString(schemaVersion)
+ s.lock.RLock()
+ schema = s.cache[key]
+ s.lock.RUnlock()
+ if schema != nil {
+ return
+ }
+
+ pbSchema, err := s.client.lookupService.GetSchema(s.topic,
schemaVersion)
+ if err != nil {
+ return nil, err
+ }
+
+ var properties = make(map[string]string)
+ if pbSchema.Properties != nil {
+ for _, entry := range pbSchema.Properties {
+ properties[*entry.Key] = properties[*entry.Value]
+ }
+ }
+ schema, err = NewSchema(SchemaType(*pbSchema.Type),
pbSchema.SchemaData, properties)
+ if err != nil {
+ return nil, err
+ }
+ s.add(key, schema)
+ return schema, nil
+
+}
+func (s *schemaInfoCache) add(schemaVersionHash string, schema Schema) {
+ s.lock.Lock()
+ defer s.lock.Unlock()
+
+ s.cache[schemaVersionHash] = schema
Review comment:
You are right, overwrite is not allowed. It is just a private function
for `SchemaInfoCache.Get` which do the overwrite check.
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