mirror of
https://github.com/openziti/ziti.git
synced 2026-10-07 21:31:16 +00:00
Paul Lorenz
76 lines
2.0 KiB
Go
76 lines
2.0 KiB
Go
/*
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Copyright NetFoundry Inc.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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https://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package xt_smartrouting
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import (
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"github.com/openziti/ziti/controller/xt"
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"github.com/openziti/ziti/controller/xt_common"
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"math"
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"time"
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)
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const (
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Name = "smartrouting"
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)
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/**
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The smartrouting strategy relies purely on maninpulating costs and lets the smart routing algorithm pick the terminator.
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It increases costs by a small amount when a new circuit uses the terminator and drops it back down when the circuit
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closes. It also increases the cost whenever a dial fails and decreases it whenever a dial succeeds. Dial successes
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will only reduce costs by the amount that failures have previously increased it.
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*/
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func NewFactory() xt.Factory {
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return &factory{}
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}
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type factory struct{}
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func (self *factory) GetStrategyName() string {
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return Name
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}
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func (self *factory) NewStrategy() xt.Strategy {
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strategy := strategy{
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CostVisitor: xt_common.CostVisitor{
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FailureCosts: xt.NewFailureCosts(math.MaxUint16/4, 20, 2),
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CircuitCost: 2,
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},
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}
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strategy.CostVisitor.FailureCosts.CreditOverTime(5, time.Minute)
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return &strategy
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}
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type strategy struct {
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xt_common.CostVisitor
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}
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func (self *strategy) Select(terminators []xt.CostedTerminator) (xt.CostedTerminator, error) {
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return terminators[0], nil
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}
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func (self *strategy) NotifyEvent(event xt.TerminatorEvent) {
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event.Accept(&self.CostVisitor)
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}
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func (self *strategy) HandleTerminatorChange(event xt.StrategyChangeEvent) error {
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for _, t := range event.GetRemoved() {
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self.FailureCosts.Clear(t.GetId())
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}
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return nil
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}
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