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routing: ensure notifyTopologyChange is theadsafe

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Olaoluwa Osuntokun 2017-11-29 16:24:27 -08:00
parent 33ce4e5689
commit 978023ab1d
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GPG Key ID: 964EA263DD637C21
1 changed files with 7 additions and 2 deletions
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9
routing/notifications.go
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@ -110,15 +110,19 @@ type topologyClient struct {
// notifyTopologyChange notifies all registered clients of a new change in // notifyTopologyChange notifies all registered clients of a new change in
// graph topology in a non-blocking. // graph topology in a non-blocking.
func (r *ChannelRouter) notifyTopologyChange(topologyDiff *TopologyChange) { func (r *ChannelRouter) notifyTopologyChange(topologyDiff *TopologyChange) {
if len(r.topologyClients) != 0 { r.RLock()
numClients := len(r.topologyClients)
r.RUnlock()
if numClients != 0 {
log.Tracef("Sending topology notification to %v clients %v", log.Tracef("Sending topology notification to %v clients %v",
len(r.topologyClients), numClients,
newLogClosure(func() string { newLogClosure(func() string {
return spew.Sdump(topologyDiff) return spew.Sdump(topologyDiff)
}), }),
) )
} }
r.RLock()
for _, client := range r.topologyClients { for _, client := range r.topologyClients {
client.wg.Add(1) client.wg.Add(1)
@ -142,6 +146,7 @@ func (r *ChannelRouter) notifyTopologyChange(topologyDiff *TopologyChange) {
} }
}(client) }(client)
} }
r.RUnlock()
} }
// TopologyChange represents a new set of modifications to the channel graph. // TopologyChange represents a new set of modifications to the channel graph.