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36 lines
1010 B
Go
36 lines
1010 B
Go
package serverinterceptors
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import (
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"context"
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"strconv"
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"github.com/tal-tech/go-zero/core/logx"
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"github.com/tal-tech/go-zero/core/retry"
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"google.golang.org/grpc"
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"google.golang.org/grpc/codes"
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"google.golang.org/grpc/metadata"
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"google.golang.org/grpc/status"
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)
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func RetryInterceptor(maxAttempt int) grpc.UnaryServerInterceptor {
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return func(ctx context.Context, req interface{}, info *grpc.UnaryServerInfo,
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handler grpc.UnaryHandler) (resp interface{}, err error) {
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var md metadata.MD
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requestMd, ok := metadata.FromIncomingContext(ctx)
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if ok {
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md = requestMd.Copy()
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attemptMd := md.Get(retry.AttemptMetadataKey)
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if len(attemptMd) != 0 && attemptMd[0] != "" {
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if attempt, err := strconv.Atoi(attemptMd[0]); err == nil {
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if attempt > maxAttempt {
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logx.WithContext(ctx).Errorf("retries exceeded:%d, max retries:%d", attempt, maxAttempt)
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return nil, status.Error(codes.FailedPrecondition, "Retries exceeded")
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}
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}
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}
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}
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return handler(ctx, req)
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}
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}
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