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|
package serverclient
import (
"context"
"time"
"github.com/hashicorp/go-hclog"
"google.golang.org/grpc"
)
// logUnaryInterceptor returns a gRPC unary interceptor that inserts a hclog.Logger
// into the request context.
//
// Additionally, logUnaryInterceptor logs request and response metadata. If verbose
// is set to true, the request and response attributes are logged too.
func logClientUnaryInterceptor(logger hclog.Logger, verbose bool) grpc.UnaryClientInterceptor {
return func(
ctx context.Context,
method string,
req interface{},
reply interface{},
cc *grpc.ClientConn,
invoker grpc.UnaryInvoker,
opts ...grpc.CallOption) error {
start := time.Now()
// Log the request.
{
var reqLogArgs []interface{}
// Log the request's attributes only if verbose is set to true.
if verbose {
reqLogArgs = append(reqLogArgs, "request", req)
}
logger.Info(method+" request", reqLogArgs...)
}
// Invoke the handler.
ctx = hclog.WithContext(ctx, logger)
err := invoker(ctx, method, req, reply, cc, opts...)
// Log the response.
{
respLogArgs := []interface{}{
"error", err,
"duration", time.Since(start).String(),
}
// Log the response's attributes only if verbose is set to true.
if verbose {
respLogArgs = append(respLogArgs, "response", reply)
}
logger.Info(method+" response", respLogArgs...)
}
return err
}
}
|
