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backoff.go
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backoff.go
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// Copyright © 2020 The Things Network Foundation, The Things Industries B.V.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package io
import (
"context"
"time"
"go.thethings.network/lorawan-stack/v3/pkg/component"
"go.thethings.network/lorawan-stack/v3/pkg/errors"
)
var (
dialTaskBackoffIntervals = append(component.DialTaskBackoffIntervals[:],
time.Minute,
)
dialTaskExtendedBackoffIntervals = append(dialTaskBackoffIntervals[:],
5*time.Minute,
15*time.Minute,
30*time.Minute,
)
// DialTaskBackoffConfig derives the component.DialTaskBackoffConfig and dynamically determines the backoff duration
// based on recent error codes.
DialTaskBackoffConfig = &component.TaskBackoffConfig{
Jitter: component.DefaultTaskBackoffJitter,
IntervalFunc: func(ctx context.Context, executionDuration time.Duration, invocation uint, err error) time.Duration {
intervals := dialTaskBackoffIntervals
switch {
case errors.IsFailedPrecondition(err),
errors.IsUnauthenticated(err),
errors.IsPermissionDenied(err),
errors.IsInvalidArgument(err),
errors.IsAlreadyExists(err),
errors.IsCanceled(err),
errors.IsNotFound(err):
intervals = dialTaskExtendedBackoffIntervals
}
switch {
case executionDuration > component.DefaultTaskBackoffResetDuration:
return intervals[0]
case invocation >= uint(len(intervals)):
return intervals[len(intervals)-1]
default:
return intervals[invocation-1]
}
},
}
)