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retry.go
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retry.go
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// The MIT License
//
// Copyright (c) 2020 Temporal Technologies Inc. All rights reserved.
//
// Copyright (c) 2020 Uber Technologies, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
package interceptor
import (
"context"
"google.golang.org/grpc"
"go.temporal.io/server/common/backoff"
)
type (
RetryableInterceptor struct {
policy backoff.RetryPolicy
isRetryable backoff.IsRetryable
}
)
var _ grpc.UnaryServerInterceptor = (*RetryableInterceptor)(nil).Intercept
func NewRetryableInterceptor(
policy backoff.RetryPolicy,
isRetryable backoff.IsRetryable,
) *RetryableInterceptor {
return &RetryableInterceptor{
policy: policy,
isRetryable: isRetryable,
}
}
func (i *RetryableInterceptor) Intercept(
ctx context.Context,
req interface{},
info *grpc.UnaryServerInfo,
handler grpc.UnaryHandler,
) (interface{}, error) {
var response interface{}
op := func(ctx context.Context) error {
var err error
response, err = handler(ctx, req)
return err
}
err := backoff.ThrottleRetryContext(ctx, op, i.policy, i.isRetryable)
return response, err
}