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poller_manager.go
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/
poller_manager.go
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package znet
import (
"fmt"
"github.com/zhihanii/zlog"
)
const defaultNumLoops = 100
var defaultPollerManager *pollerManager
type pollerManager struct {
numLoops int
pollers []Poller
balancer loadBalancer
}
func (m *pollerManager) SetNumLoops(numLoops int) error {
if numLoops < 1 {
return fmt.Errorf("set invalid numLoops[%d]", numLoops)
}
if numLoops < m.numLoops {
var err error
var pollers = make([]Poller, numLoops)
for i := 0; i < m.numLoops; i++ {
if i < numLoops {
pollers[i] = m.pollers[i]
} else {
if err = m.pollers[i].Close(); err != nil {
zlog.Errorf("poller close failed: %v", err)
}
}
}
m.numLoops = numLoops
m.pollers = pollers
m.balancer.Rebalance(m.pollers)
return nil
}
m.numLoops = numLoops
return m.buildPollers()
}
func (m *pollerManager) SetLoadBalancer(lb LoadBalance) error {
if m.balancer != nil && m.balancer.LoadBalance() == lb {
return nil
}
m.balancer, _ = newLoadBalancer(lb, m.pollers)
return nil
}
func (m *pollerManager) Reset() error {
for _, p := range m.pollers {
p.Close()
}
m.pollers = nil
return m.buildPollers()
}
func (m *pollerManager) Pick() Poller {
return m.balancer.Pick()
}
func (m *pollerManager) buildPollers() error {
for i := len(m.pollers); i < m.numLoops; i++ {
var p = openPoller()
m.pollers = append(m.pollers, p)
go p.Poll()
}
m.balancer.Rebalance(m.pollers)
return nil
}