mirror of https://github.com/docker/docs.git
71 lines
1.2 KiB
Go
71 lines
1.2 KiB
Go
package api
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import (
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"fmt"
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"io"
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"net/http"
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"sync"
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"github.com/docker/swarm/cluster"
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)
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type eventsHandler struct {
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sync.RWMutex
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ws map[string]io.Writer
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cs map[string]chan struct{}
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}
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func NewEventsHandler() *eventsHandler {
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return &eventsHandler{
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ws: make(map[string]io.Writer),
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cs: make(map[string]chan struct{}),
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}
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}
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func (eh *eventsHandler) Add(remoteAddr string, w io.Writer) {
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eh.Lock()
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eh.ws[remoteAddr] = w
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eh.cs[remoteAddr] = make(chan struct{})
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eh.Unlock()
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}
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func (eh *eventsHandler) Wait(remoteAddr string) {
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<-eh.cs[remoteAddr]
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}
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func (eh *eventsHandler) Handle(e *cluster.Event) error {
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eh.RLock()
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str := fmt.Sprintf("{%q:%q,%q:%q,%q:%q,%q:%d,%q:%q,%q:%q,%q:%q,%q:%q}",
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"status", e.Status,
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"id", e.Id,
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"from", e.From+" node:"+e.Node.Name,
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"time", e.Time,
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"node_name", e.Node.Name,
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"node_id", e.Node.ID,
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"node_addr", e.Node.Addr,
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"node_ip", e.Node.IP)
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for key, w := range eh.ws {
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if _, err := fmt.Fprintf(w, str); err != nil {
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close(eh.cs[key])
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delete(eh.ws, key)
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delete(eh.cs, key)
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continue
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}
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if f, ok := w.(http.Flusher); ok {
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f.Flush()
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}
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}
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eh.RUnlock()
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return nil
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}
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func (eh *eventsHandler) Size() int {
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eh.RLock()
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defer eh.RUnlock()
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return len(eh.ws)
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}
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