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manager.go
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manager.go
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package balance
import "fmt"
type BalanceMgr struct{
addrs NodeAddrs
balancers map[string]Balancer
change map[string]bool
}
func NewBalanceMgr(addrs NodeAddrs) *BalanceMgr {
return &BalanceMgr{
balancers:make(map[string]Balancer),
addrs:addrs,
change:make(map[string]bool),
}
}
func (p *BalanceMgr) RegisterBalancer(name string,balancer Balancer){
balancer.init(p.addrs)
p.balancers[name]=balancer
p.change[name]=false
}
func (p *BalanceMgr) updateBalancer(name string){
fmt.Println("update ",name)
balancer := p.balancers[name]
balancer.init(p.addrs)
p.balancers[name]=balancer
p.change[name]=false
}
func (p *BalanceMgr) GetAddr(name string)(*NodeAddr,int,error) {
if p.change[name]{
p.updateBalancer(name)
}
balancer := p.balancers[name]
index,err := balancer.DoBalance()
return p.addrs[index],index,err
}
func (p *BalanceMgr) GetAddrString(name string)(string,int,error) {
if p.change[name]{
p.updateBalancer(name)
}
addr,index,err := p.GetAddr(name)
return addr.String(),index,err
}
func (p *BalanceMgr) GetAddrStringDebug(name string)(string,int,error) {
if p.change[name]{
p.updateBalancer(name)
}
addr,index,err := p.GetAddr(name)
return addr.StringDebug(),index,err
}
func (p *BalanceMgr) AddNodeAddr(addr *NodeAddr){
p.addrs = append(p.addrs,addr)
for name,_ :=range p.change{
p.change[name]=true
}
}
func (p *BalanceMgr) DeleteNodeAddr(i int){
p.addrs = append(p.addrs[:i], p.addrs[i+1:]...)
for name,_ :=range p.change{
p.change[name]=true
}
}
func (p *BalanceMgr) UpdateWeightNodeAddr(i int,weight int){
p.addrs[i].UpdateWeight(weight)
for name,_ :=range p.change{
p.change[name]=true
}
}