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// Copyright 2015 The LUCI Authors.
//
// 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 retry
import (
"context"
"time"
)
// defaultIterator defines a template for the default retry parameters that
// should be used throughout the program.
var defaultIteratorTemplate = ExponentialBackoff{
Limited: Limited{
Delay: 200 * time.Millisecond,
Retries: 10,
},
MaxDelay: 10 * time.Second,
Multiplier: 2,
}
// Default is a Factory that returns a new instance of the default iterator
// configuration.
func Default() Iterator {
it := defaultIteratorTemplate
return &it
}
type noneItTemplate struct{}
func (noneItTemplate) Next(context.Context, error) time.Duration { return Stop }
// None is a Factory that returns an Iterator that explicitly calls Stop after
// the first try. This is helpful to pass to libraries which use retry.Default
// if given nil, but where you don't want any retries at all (e.g. tests).
func None() Iterator {
return noneItTemplate{}
}