/
internal_retry.go
125 lines (114 loc) · 4.47 KB
/
internal_retry.go
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// Copyright (c) 2017 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 internal
// All code in this file is private to the package.
import (
"context"
"errors"
"time"
s "go.uber.org/cadence/.gen/go/shared"
"go.uber.org/cadence/internal/common/backoff"
)
const (
retryServiceOperationInitialInterval = 20 * time.Millisecond
retryServiceOperationExpirationInterval = 60 * time.Second
retryServiceOperationBackoff = 1.2
)
// Creates a retry policy which allows appropriate retries for the deadline passed in as context.
// It uses the context deadline to set MaxInterval as 1/10th of context timeout
// MaxInterval = Max(context_timeout/10, 20ms)
// defaults to ExpirationInterval of 60 seconds, or uses context deadline as expiration interval
func createDynamicServiceRetryPolicy(ctx context.Context) backoff.RetryPolicy {
timeout := retryServiceOperationExpirationInterval
if ctx != nil {
now := time.Now()
if expiration, ok := ctx.Deadline(); ok && expiration.After(now) {
timeout = expiration.Sub(now)
}
}
initialInterval := retryServiceOperationInitialInterval
maximumInterval := timeout / 10
if maximumInterval < retryServiceOperationInitialInterval {
maximumInterval = retryServiceOperationInitialInterval
}
policy := backoff.NewExponentialRetryPolicy(initialInterval)
policy.SetBackoffCoefficient(retryServiceOperationBackoff)
policy.SetMaximumInterval(maximumInterval)
policy.SetExpirationInterval(timeout)
return policy
}
func isServiceTransientError(err error) bool {
// check intentionally-not-retried error types via errors.As.
//
// sadly we cannot build this into a list of error values / types to range over, as that
// would turn the variable passed as the &target into e.g. an interface{} or an error,
// which is compatible with ALL errors, so all are .As(err, &target).
//
// so we're left with this mess. it's not even generics-friendly.
// at least this pattern lets it be done inline without exposing the variable.
if target := (*s.AccessDeniedError)(nil); errors.As(err, &target) {
return false
}
if target := (*s.BadRequestError)(nil); errors.As(err, &target) {
return false
}
if target := (*s.CancellationAlreadyRequestedError)(nil); errors.As(err, &target) {
return false
}
if target := (*s.ClientVersionNotSupportedError)(nil); errors.As(err, &target) {
return false
}
if target := (*s.DomainAlreadyExistsError)(nil); errors.As(err, &target) {
return false
}
if target := (*s.DomainNotActiveError)(nil); errors.As(err, &target) {
return false
}
if target := (*s.EntityNotExistsError)(nil); errors.As(err, &target) {
return false
}
if target := (*s.FeatureNotEnabledError)(nil); errors.As(err, &target) {
return false
}
if target := (*s.LimitExceededError)(nil); errors.As(err, &target) {
return false
}
if target := (*s.QueryFailedError)(nil); errors.As(err, &target) {
return false
}
if target := (*s.WorkflowExecutionAlreadyCompletedError)(nil); errors.As(err, &target) {
return false
}
if target := (*s.WorkflowExecutionAlreadyStartedError)(nil); errors.As(err, &target) {
return false
}
// shutdowns are not retryable, of course
if errors.Is(err, errShutdown) {
return false
}
if target := (*s.ServiceBusyError)(nil); errors.As(err, &target) {
return true
}
// s.InternalServiceError
// s.ServiceBusyError (must retry after a delay, but it is transient)
// server-side-only error types (as they should not reach clients)
// and all other `error` types
return true
}