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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,58 @@ | ||
| package warmup | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "encoding/binary" | ||
| "strings" | ||
| "sync" | ||
| "time" | ||
|
|
||
| "github.com/cenkalti/backoff/v4" | ||
| "github.com/doublecloud/transfer/pkg/parsers" | ||
| "github.com/doublecloud/transfer/pkg/schemaregistry/confluent" | ||
| "github.com/doublecloud/transfer/pkg/util" | ||
| "github.com/doublecloud/transfer/pkg/util/set" | ||
| "go.ytsaurus.tech/library/go/core/log" | ||
| ) | ||
|
|
||
| // It's important to warn-up Schema-Registry cache single-thread, to not to DDoS Schema-Registry | ||
| // mutex we need not bcs of something is thread-unsafe, but to reduce schema-registry RPS | ||
| func WarmUpSRCache(logger log.Logger, mutex *sync.Mutex, batch parsers.MessageBatch, schemaRegistryClient *confluent.SchemaRegistryClient, notFoundIsOk bool) { | ||
| extractSchemaID := func(buf []byte) (uint32, []byte) { | ||
| msgLen := len(buf) | ||
| if len(buf) != 0 { | ||
| if buf[0] == 0 { | ||
| zeroIndex := bytes.Index(buf[5:], []byte{0}) | ||
| if zeroIndex != -1 { | ||
| msgLen = 5 + zeroIndex | ||
| } | ||
| } | ||
| } | ||
| return binary.BigEndian.Uint32(buf[1:5]), buf[msgLen:] | ||
| } | ||
|
|
||
| schemaIDs := set.New[uint32]() | ||
| var schemaID uint32 = 0 | ||
| for _, currMsg := range batch.Messages { | ||
| leastBuf := currMsg.Value | ||
| for { | ||
| if len(leastBuf) == 0 { | ||
| break | ||
| } | ||
| schemaID, leastBuf = extractSchemaID(leastBuf) | ||
| schemaIDs.Add(schemaID) | ||
| } | ||
| } | ||
|
|
||
| mutex.Lock() | ||
| defer mutex.Unlock() | ||
| for _, currSchemaID := range schemaIDs.Slice() { | ||
| _ = backoff.RetryNotify(func() error { | ||
| _, err := schemaRegistryClient.GetSchema(int(currSchemaID)) | ||
| if notFoundIsOk && err != nil && strings.Contains(err.Error(), "Error code: 404") { | ||
| return nil | ||
| } | ||
| return err | ||
| }, backoff.NewConstantBackOff(time.Second), util.BackoffLogger(logger, "getting schema (warm-up cache)")) | ||
| } | ||
| } |