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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,19 @@ | ||
| package castai | ||
|
|
||
| import ( | ||
| "google.golang.org/grpc/codes" | ||
| "google.golang.org/grpc/status" | ||
| ) | ||
|
|
||
| func IsGRPCError(err error, codes ...codes.Code) bool { | ||
| st, ok := status.FromError(err) | ||
| if !ok { | ||
| return false | ||
| } | ||
| for _, code := range codes { | ||
| if st.Code() == code { | ||
| return true | ||
| } | ||
| } | ||
| return false | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,88 @@ | ||
| package castai | ||
|
|
||
| import ( | ||
| "context" | ||
| "errors" | ||
| "fmt" | ||
| "time" | ||
|
|
||
| "google.golang.org/grpc" | ||
| ) | ||
|
|
||
| var ( | ||
| errNoActiveStream = errors.New("no active stream") | ||
| ) | ||
|
|
||
| func NewWriteStream[T, U any](ctx context.Context, createStreamFunc func(ctx context.Context) (grpc.ClientStream, error)) *WriteStream[T, U] { | ||
| return &WriteStream[T, U]{ | ||
| rootCtx: ctx, | ||
| createStreamFunc: createStreamFunc, | ||
| } | ||
| } | ||
|
|
||
| // WriteStream wraps grpc client stream and handles stream reopen in case of send errors. | ||
| type WriteStream[T, U any] struct { | ||
| rootCtx context.Context | ||
| createStreamFunc func(ctx context.Context) (grpc.ClientStream, error) | ||
| activeStream grpc.ClientStream | ||
| activeStreamCtx context.Context | ||
| activeStreamCtxCancel context.CancelFunc | ||
| wasOpened bool | ||
|
|
||
| ReopenDelay time.Duration | ||
| } | ||
|
|
||
| func (w *WriteStream[T, U]) Send(m T) error { | ||
| if w.activeStream == nil { | ||
| if err := w.open(); err != nil { | ||
| return err | ||
| } | ||
| } | ||
|
|
||
| if err := w.activeStream.SendMsg(m); err != nil { | ||
| w.close() | ||
| return err | ||
| } | ||
| return nil | ||
| } | ||
|
|
||
| func (w *WriteStream[T, U]) Recv(m T) error { | ||
| if w.activeStream == nil { | ||
| return errNoActiveStream | ||
| } | ||
| return w.activeStream.RecvMsg(m) | ||
| } | ||
|
|
||
| func (w *WriteStream[T, U]) Close() error { | ||
| if w.activeStream == nil { | ||
| return errNoActiveStream | ||
| } | ||
| err := w.activeStream.CloseSend() | ||
| w.close() | ||
| return err | ||
| } | ||
|
|
||
| func (w *WriteStream[T, U]) open() error { | ||
| if w.wasOpened && w.ReopenDelay != 0 { | ||
| time.Sleep(w.ReopenDelay) | ||
| } | ||
| var err error | ||
| w.activeStreamCtx, w.activeStreamCtxCancel = context.WithCancel(w.rootCtx) | ||
| w.activeStream, err = w.createStreamFunc(w.activeStreamCtx) | ||
| if err != nil { | ||
| w.close() | ||
| return fmt.Errorf("open stream: %w", err) | ||
| } | ||
| w.wasOpened = true | ||
| return nil | ||
| } | ||
|
|
||
| func (w *WriteStream[T, U]) close() { | ||
| // To properly close active stream we can cancel it's context. | ||
| // See https://github.com/grpc/grpc-go/blob/master/stream.go#L148 | ||
| if w.activeStreamCtxCancel != nil { | ||
| w.activeStreamCtxCancel() | ||
| } | ||
| w.activeStreamCtx = nil | ||
| w.activeStream = nil | ||
| } |
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