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watcher.go
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/
watcher.go
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package gossip
import (
"github.com/micro/go-micro/registry"
)
type gossipWatcher struct {
wo registry.WatchOptions
next chan *registry.Result
stop chan bool
}
func newGossipWatcher(ch chan *registry.Result, stop chan bool, opts ...registry.WatchOption) (registry.Watcher, error) {
var wo registry.WatchOptions
for _, o := range opts {
o(&wo)
}
return &gossipWatcher{
wo: wo,
next: ch,
stop: stop,
}, nil
}
func (m *gossipWatcher) Next() (*registry.Result, error) {
for {
select {
case r, ok := <-m.next:
if !ok {
return nil, registry.ErrWatcherStopped
}
// check watch options
if len(m.wo.Service) > 0 && r.Service.Name != m.wo.Service {
continue
}
return r, nil
case <-m.stop:
return nil, registry.ErrWatcherStopped
}
}
}
func (m *gossipWatcher) Stop() {
select {
case <-m.stop:
return
default:
close(m.stop)
}
}