go.temporal.io/server@v1.23.0/common/rpc/interceptor/retry.go (about)

     1  // The MIT License
     2  //
     3  // Copyright (c) 2020 Temporal Technologies Inc.  All rights reserved.
     4  //
     5  // Copyright (c) 2020 Uber Technologies, Inc.
     6  //
     7  // Permission is hereby granted, free of charge, to any person obtaining a copy
     8  // of this software and associated documentation files (the "Software"), to deal
     9  // in the Software without restriction, including without limitation the rights
    10  // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
    11  // copies of the Software, and to permit persons to whom the Software is
    12  // furnished to do so, subject to the following conditions:
    13  //
    14  // The above copyright notice and this permission notice shall be included in
    15  // all copies or substantial portions of the Software.
    16  //
    17  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    18  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    19  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    20  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    21  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    22  // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
    23  // THE SOFTWARE.
    24  
    25  package interceptor
    26  
    27  import (
    28  	"context"
    29  
    30  	"google.golang.org/grpc"
    31  
    32  	"go.temporal.io/server/common/backoff"
    33  )
    34  
    35  type (
    36  	RetryableInterceptor struct {
    37  		policy      backoff.RetryPolicy
    38  		isRetryable backoff.IsRetryable
    39  	}
    40  )
    41  
    42  var _ grpc.UnaryServerInterceptor = (*RetryableInterceptor)(nil).Intercept
    43  
    44  func NewRetryableInterceptor(
    45  	policy backoff.RetryPolicy,
    46  	isRetryable backoff.IsRetryable,
    47  ) *RetryableInterceptor {
    48  	return &RetryableInterceptor{
    49  		policy:      policy,
    50  		isRetryable: isRetryable,
    51  	}
    52  }
    53  
    54  func (i *RetryableInterceptor) Intercept(
    55  	ctx context.Context,
    56  	req interface{},
    57  	info *grpc.UnaryServerInfo,
    58  	handler grpc.UnaryHandler,
    59  ) (interface{}, error) {
    60  	var response interface{}
    61  	op := func(ctx context.Context) error {
    62  		var err error
    63  		response, err = handler(ctx, req)
    64  		return err
    65  	}
    66  
    67  	err := backoff.ThrottleRetryContext(ctx, op, i.policy, i.isRetryable)
    68  	return response, err
    69  }