github.com/iqoqo/nomad@v0.11.3-0.20200911112621-d7021c74d101/helper/grpc-middleware/logging/client_interceptors.go (about)

     1  package logging
     2  
     3  import (
     4  	"context"
     5  	"path"
     6  	"time"
     7  
     8  	"github.com/hashicorp/go-hclog"
     9  	"google.golang.org/grpc"
    10  	"google.golang.org/grpc/status"
    11  )
    12  
    13  // UnaryClientInterceptor returns a new unary client interceptor that logs the execution of gRPC calls.
    14  func UnaryClientInterceptor(logger hclog.Logger, opts ...Option) grpc.UnaryClientInterceptor {
    15  	o := evaluateClientOpt(opts)
    16  	return func(ctx context.Context, method string, req, reply interface{}, cc *grpc.ClientConn, invoker grpc.UnaryInvoker, opts ...grpc.CallOption) error {
    17  		startTime := time.Now()
    18  		err := invoker(ctx, method, req, reply, cc, opts...)
    19  		emitClientLog(logger, o, method, startTime, err, "finished client unary call")
    20  		return err
    21  	}
    22  }
    23  
    24  // StreamClientInterceptor returns a new streaming client interceptor that logs the execution of gRPC calls.
    25  func StreamClientInterceptor(logger hclog.Logger, opts ...Option) grpc.StreamClientInterceptor {
    26  	o := evaluateClientOpt(opts)
    27  	return func(ctx context.Context, desc *grpc.StreamDesc, cc *grpc.ClientConn, method string, streamer grpc.Streamer, opts ...grpc.CallOption) (grpc.ClientStream, error) {
    28  		startTime := time.Now()
    29  		clientStream, err := streamer(ctx, desc, cc, method, opts...)
    30  		emitClientLog(logger, o, method, startTime, err, "finished client streaming call")
    31  		return clientStream, err
    32  	}
    33  }
    34  
    35  func emitClientLog(logger hclog.Logger, o *options, fullMethodString string, startTime time.Time, err error, msg string) {
    36  	code := status.Code(err)
    37  	logLevel := o.levelFunc(code)
    38  	reqDuration := time.Now().Sub(startTime)
    39  	service := path.Dir(fullMethodString)[1:]
    40  	method := path.Base(fullMethodString)
    41  	logger.Log(logLevel, msg, "grpc.code", code, "duration", reqDuration, "grpc.service", service, "grpc.method", method)
    42  }