v2ray-core/app/router/balancing_override.go

package router

import (
	sync "sync"
)

func (r *Router) OverrideBalancer(balancer string, target string) error {
	var b *Balancer
	for tag, bl := range r.balancers {
		if tag == balancer {
			b = bl
			break
		}
	}
	if b == nil {
		return newError("balancer '", balancer, "' not found")
	}
	b.override.Put(target)
	return nil
}

type overrideSettings struct {
	target string
}

type override struct {
	access   sync.RWMutex
	settings overrideSettings
}

// Get gets the override settings
func (o *override) Get() string {
	o.access.RLock()
	defer o.access.RUnlock()
	return o.settings.target
}

// Put updates the override settings
func (o *override) Put(target string) {
	o.access.Lock()
	defer o.access.Unlock()
	o.settings.target = target
}

// Clear clears the override settings
func (o *override) Clear() {
	o.access.Lock()
	defer o.access.Unlock()
	o.settings.target = ""
}