github.com/hasnat/dolt/go@v0.0.0-20210628190320-9eb5d843fbb7/libraries/doltcore/remotestorage/retrying_interceptor.go (about)

     1  // Copyright 2020 Dolthub, Inc.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package remotestorage
    16  
    17  import (
    18  	"context"
    19  
    20  	"github.com/cenkalti/backoff"
    21  	"google.golang.org/grpc"
    22  )
    23  
    24  const (
    25  	csClientRetries = 5
    26  )
    27  
    28  var csRetryParams = backoff.NewExponentialBackOff()
    29  
    30  func RetryingUnaryClientInterceptor(ctx context.Context, method string, req, reply interface{}, cc *grpc.ClientConn, invoker grpc.UnaryInvoker, opts ...grpc.CallOption) error {
    31  	doit := func() error {
    32  		err := invoker(ctx, method, req, reply, cc, opts...)
    33  		return processGrpcErr(err)
    34  	}
    35  	return backoff.Retry(doit, backoff.WithMaxRetries(csRetryParams, csClientRetries))
    36  }