// Proxy will return an instance of a proxy based on the handle
// If one already exists with the given handle, it will be used.
// Otherwise a new one will be created.
func (pf *ProxyFactory) Proxy(handle string) *proxy.Proxy {
var ret *proxy.Proxy
pf.lock.Lock()
if _, ok := pf.proxies[handle]; !ok {
proxy := proxy.New(handle)
pf.availability[handle] = proxy.Available()
pf.proxies[handle] = proxy
}
ret = pf.proxies[handle]
pf.lock.Unlock()
return ret
}
// New is the constructor function for ProxyFactory
func New() *ProxyFactory {
pf := &ProxyFactory{
proxies: make(map[string]*proxy.Proxy),
availability: make(map[string]bool),
lock: &sync.Mutex{},
}
go func() {
for _ = range time.Tick(30 * time.Second) {
pf.lock.Lock()
for key, proxy := range pf.proxies {
pf.availability[key] = proxy.Available()
log.WithFields(log.Fields{
"proxy": key,
"available": pf.availability[key],
}).Debug("Proxy availability check")
}
pf.lock.Unlock()
}
}()
return pf
}