119 lines
2.7 KiB
Go
119 lines
2.7 KiB
Go
package dummyclient
|
|
|
|
import (
|
|
"fmt"
|
|
"log"
|
|
"net/http"
|
|
|
|
"github.com/Sirupsen/logrus"
|
|
events "github.com/docker/go-events"
|
|
"github.com/docker/libnetwork/diagnose"
|
|
"github.com/docker/libnetwork/networkdb"
|
|
)
|
|
|
|
// DummyClientPaths2Func exported paths for the client
|
|
var DummyClientPaths2Func = map[string]diagnose.HTTPHandlerFunc{
|
|
"/watchtable": watchTable,
|
|
"/watchedtableentries": watchTableEntries,
|
|
}
|
|
|
|
const (
|
|
missingParameter = "missing parameter"
|
|
)
|
|
|
|
type tableHandler struct {
|
|
cancelWatch func()
|
|
entries map[string]string
|
|
}
|
|
|
|
var clientWatchTable = map[string]tableHandler{}
|
|
|
|
func watchTable(ctx interface{}, w http.ResponseWriter, r *http.Request) {
|
|
r.ParseForm()
|
|
diagnose.DebugHTTPForm(r)
|
|
if len(r.Form["tname"]) < 1 {
|
|
diagnose.HTTPReplyError(w, missingParameter, fmt.Sprintf("%s?tname=table_name", r.URL.Path))
|
|
return
|
|
}
|
|
|
|
tableName := r.Form["tname"][0]
|
|
if _, ok := clientWatchTable[tableName]; ok {
|
|
fmt.Fprintf(w, "OK\n")
|
|
return
|
|
}
|
|
|
|
nDB, ok := ctx.(*networkdb.NetworkDB)
|
|
if ok {
|
|
ch, cancel := nDB.Watch(tableName, "", "")
|
|
clientWatchTable[tableName] = tableHandler{cancelWatch: cancel, entries: make(map[string]string)}
|
|
go handleTableEvents(tableName, ch)
|
|
|
|
fmt.Fprintf(w, "OK\n")
|
|
}
|
|
}
|
|
|
|
func watchTableEntries(ctx interface{}, w http.ResponseWriter, r *http.Request) {
|
|
r.ParseForm()
|
|
diagnose.DebugHTTPForm(r)
|
|
if len(r.Form["tname"]) < 1 {
|
|
diagnose.HTTPReplyError(w, missingParameter, fmt.Sprintf("%s?tname=table_name", r.URL.Path))
|
|
return
|
|
}
|
|
|
|
tableName := r.Form["tname"][0]
|
|
table, ok := clientWatchTable[tableName]
|
|
if !ok {
|
|
fmt.Fprintf(w, "Table %s not watched\n", tableName)
|
|
return
|
|
}
|
|
|
|
fmt.Fprintf(w, "total elements: %d\n", len(table.entries))
|
|
i := 0
|
|
for k, v := range table.entries {
|
|
fmt.Fprintf(w, "%d) k:`%s` -> v:`%s`\n", i, k, v)
|
|
i++
|
|
}
|
|
}
|
|
|
|
func handleTableEvents(tableName string, ch *events.Channel) {
|
|
var (
|
|
// nid string
|
|
eid string
|
|
value []byte
|
|
isAdd bool
|
|
)
|
|
|
|
logrus.Infof("Started watching table:%s", tableName)
|
|
for {
|
|
select {
|
|
case <-ch.Done():
|
|
logrus.Infof("End watching %s", tableName)
|
|
return
|
|
|
|
case evt := <-ch.C:
|
|
logrus.Infof("Recevied new event on:%s", tableName)
|
|
switch event := evt.(type) {
|
|
case networkdb.CreateEvent:
|
|
// nid = event.NetworkID
|
|
eid = event.Key
|
|
value = event.Value
|
|
isAdd = true
|
|
case networkdb.DeleteEvent:
|
|
// nid = event.NetworkID
|
|
eid = event.Key
|
|
value = event.Value
|
|
isAdd = false
|
|
default:
|
|
log.Fatalf("Unexpected table event = %#v", event)
|
|
}
|
|
if isAdd {
|
|
// logrus.Infof("Add %s %s", tableName, eid)
|
|
clientWatchTable[tableName].entries[eid] = string(value)
|
|
} else {
|
|
// logrus.Infof("Del %s %s", tableName, eid)
|
|
delete(clientWatchTable[tableName].entries, eid)
|
|
}
|
|
}
|
|
}
|
|
}
|