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38 lines
1.1 KiB
Go
38 lines
1.1 KiB
Go
package serverinterceptors
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import (
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"context"
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"errors"
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"github.com/zeromicro/go-zero/core/breaker"
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"github.com/zeromicro/go-zero/zrpc/internal/codes"
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"google.golang.org/grpc"
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gcodes "google.golang.org/grpc/codes"
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"google.golang.org/grpc/status"
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)
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// StreamBreakerInterceptor is an interceptor that acts as a circuit breaker.
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func StreamBreakerInterceptor(svr any, stream grpc.ServerStream, info *grpc.StreamServerInfo,
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handler grpc.StreamHandler) (err error) {
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breakerName := info.FullMethod
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return breaker.DoWithAcceptable(breakerName, func() error {
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return handler(svr, stream)
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}, codes.Acceptable)
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}
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// UnaryBreakerInterceptor is an interceptor that acts as a circuit breaker.
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func UnaryBreakerInterceptor(ctx context.Context, req any, info *grpc.UnaryServerInfo,
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handler grpc.UnaryHandler) (resp any, err error) {
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breakerName := info.FullMethod
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err = breaker.DoWithAcceptable(breakerName, func() error {
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var err error
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resp, err = handler(ctx, req)
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return err
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}, codes.Acceptable)
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if errors.Is(err, breaker.ErrServiceUnavailable) {
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err = status.Error(gcodes.Unavailable, err.Error())
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}
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return resp, err
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}
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