74 lines
1.1 KiB
Go
74 lines
1.1 KiB
Go
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package etcd
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import (
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"github.com/coreos/go-etcd/etcd"
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"github.com/myodc/go-micro/registry"
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)
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type etcdWatcher struct {
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registry *etcdRegistry
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stop chan bool
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}
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func newEtcdWatcher(r *etcdRegistry) *etcdWatcher {
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ew := &etcdWatcher{
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registry: r,
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stop: make(chan bool),
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}
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ch := make(chan *etcd.Response)
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go r.client.Watch(prefix, 0, true, ch, ew.stop)
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go func() {
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for rsp := range ch {
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if rsp.Node.Dir {
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continue
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}
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s := decode(rsp.Node.Value)
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if s == nil {
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continue
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}
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r.Lock()
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service, ok := r.services[s.Name]
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if !ok {
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if rsp.Action == "create" {
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r.services[s.Name] = s
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}
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r.Unlock()
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continue
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}
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switch rsp.Action {
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case "delete":
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var nodes []*registry.Node
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for _, node := range service.Nodes {
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var seen bool
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for _, n := range s.Nodes {
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if node.Id == n.Id {
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seen = true
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break
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}
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}
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if !seen {
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nodes = append(nodes, node)
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}
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}
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service.Nodes = nodes
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case "create":
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service.Nodes = append(service.Nodes, s.Nodes...)
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}
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r.Unlock()
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}
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}()
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return ew
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}
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func (ew *etcdWatcher) Stop() {
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ew.stop <- true
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}
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