forked from zeromicro/go-zero
/
breakerinterceptor.go
37 lines (32 loc) · 1.1 KB
/
breakerinterceptor.go
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package serverinterceptors
import (
"context"
"errors"
"github.com/Wkh3/go-zero/core/breaker"
"github.com/Wkh3/go-zero/zrpc/internal/codes"
"google.golang.org/grpc"
gcodes "google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
)
// StreamBreakerInterceptor is an interceptor that acts as a circuit breaker.
func StreamBreakerInterceptor(svr any, stream grpc.ServerStream, info *grpc.StreamServerInfo,
handler grpc.StreamHandler) (err error) {
breakerName := info.FullMethod
return breaker.DoWithAcceptable(breakerName, func() error {
return handler(svr, stream)
}, codes.Acceptable)
}
// UnaryBreakerInterceptor is an interceptor that acts as a circuit breaker.
func UnaryBreakerInterceptor(ctx context.Context, req any, info *grpc.UnaryServerInfo,
handler grpc.UnaryHandler) (resp any, err error) {
breakerName := info.FullMethod
err = breaker.DoWithAcceptable(breakerName, func() error {
var err error
resp, err = handler(ctx, req)
return err
}, codes.Acceptable)
if errors.Is(err, breaker.ErrServiceUnavailable) {
err = status.Error(gcodes.Unavailable, err.Error())
}
return resp, err
}