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65 lines
2.5 KiB
Go
65 lines
2.5 KiB
Go
// The MIT License
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//
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// Copyright (c) 2020 Temporal Technologies Inc. All rights reserved.
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//
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// Copyright (c) 2020 Uber Technologies, Inc.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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package internal
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// All code in this file is private to the package.
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import (
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"context"
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"time"
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"go.temporal.io/sdk/internal/common/backoff"
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)
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const (
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retryServiceOperationInitialInterval = 200 * time.Millisecond
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retryServiceOperationExpirationInterval = 60 * time.Second
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retryServiceOperationBackoff = 2
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)
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// Creates a retry policy which allows appropriate retries for the deadline passed in as context.
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// It uses the context deadline to set MaxInterval as 1/10th of context timeout
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// MaxInterval = Max(context_timeout/10, 20ms)
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// defaults to ExpirationInterval of 60 seconds, or uses context deadline as expiration interval
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func createDynamicServiceRetryPolicy(ctx context.Context) backoff.RetryPolicy {
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timeout := retryServiceOperationExpirationInterval
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if ctx != nil {
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now := time.Now()
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if expiration, ok := ctx.Deadline(); ok && expiration.After(now) {
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timeout = expiration.Sub(now)
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}
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}
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initialInterval := retryServiceOperationInitialInterval
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maximumInterval := timeout / 10
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if maximumInterval < retryServiceOperationInitialInterval {
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maximumInterval = retryServiceOperationInitialInterval
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}
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policy := backoff.NewExponentialRetryPolicy(initialInterval)
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policy.SetBackoffCoefficient(retryServiceOperationBackoff)
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policy.SetMaximumInterval(maximumInterval)
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policy.SetExpirationInterval(timeout)
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return policy
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}
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