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insight: count client connections and set max to 16384 #1481

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Jul 26, 2019
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insight: count client connections and set max to 16384 #1481

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12 changes: 10 additions & 2 deletions api/insight/socket.io.go
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Original file line number Diff line number Diff line change
Expand Up @@ -89,6 +89,9 @@ func NewSocketServer(params *chaincfg.Params, txGetter txhelpers.RawTransactionG
return nil, err
}

// Set maximum number of connections.
server.SetMaxConnection(16384)

// Each address subscription uses its own room, which has the same name as
// the address. The number of subscribers for each room is tracked.
addrs := roomSubscriptionCounter{
Expand All @@ -97,15 +100,17 @@ func NewSocketServer(params *chaincfg.Params, txGetter txhelpers.RawTransactionG
}

server.On("connection", func(so socketio.Socket) {
apiLog.Debug("New socket.io connection")
apiLog.Debugf("New socket.io connection. %d clients are connected.",
server.Count())
// New connections automatically join the inv and sync rooms.
so.Join("inv")
so.Join("sync")

// Disconnection decrements or deletes the subscriber counter for each
// address room to which the client was subscribed.
so.On("disconnection", func() {
apiLog.Debug("socket.io client disconnected")
apiLog.Debugf("socket.io client disconnected. %d clients are connected.",
server.Count())
addrs.Lock()
for _, str := range so.Rooms() {
if c, ok := addrs.c[str]; ok {
Expand Down Expand Up @@ -143,6 +148,9 @@ func NewSocketServer(params *chaincfg.Params, txGetter txhelpers.RawTransactionG
apiLog.Errorf("Insight socket.io server error: %v", err)
})

apiLog.Infof("Started Insight socket.io server for up to %d clients.",
server.GetMaxConnection())

sockServ := SocketServer{
Server: *server,
params: params,
Expand Down