mirror of
https://github.com/openziti/ziti.git
synced 2026-10-26 13:39:58 +00:00
Paul Lorenz
86 lines
2.2 KiB
Go
86 lines
2.2 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_sticky
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import (
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"time"
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"github.com/openziti/ziti/v2/common/ctrl_msg"
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"github.com/openziti/ziti/v2/controller/xt"
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"github.com/openziti/ziti/v2/controller/xt_common"
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)
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const (
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Name = "sticky"
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)
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/**
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The sticky strategy uses the smart routing strategy to select an initial terminator for a client. It also
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returns a token to the client which can be passed back in on subsequent dials. If the token is passed
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back in, then strategy will try to use the same terminator. If it's not available a different terminator
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will be selected and a different token will be returned.
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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.NewCostVisitor(2, 20, 2),
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}
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strategy.CreditOverTimeExponential(time.Minute, 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(params xt.CreateCircuitParams, terminators []xt.CostedTerminator) (xt.CostedTerminator, xt.PeerData, error) {
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id := params.GetClientId()
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var result xt.CostedTerminator
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terminators = xt.GetRelatedTerminators(terminators)
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if id != nil {
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if terminatorId, ok := id.Data[ctrl_msg.XtStickinessToken]; ok {
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strId := string(terminatorId)
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for _, terminator := range terminators {
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if terminator.GetId() == strId {
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result = terminator
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break
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}
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}
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}
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}
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if result == nil {
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result = terminators[0]
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}
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return result, xt.PeerData{
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ctrl_msg.XtStickinessToken: []byte(result.GetId()),
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}, nil
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}
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