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cmd/syncthing: Allow custom event subscriptions (fixes #1879)

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This adds a parameter "events" to the /rest/events endpoint. It should
be a comma separated list of the events the consumer is interested in.
When not given it defaults to the current set of events, so it's
backwards compatible.

The API service then manages subscriptions, creating them as required
for each requested event mask. Old subscriptions are not "garbage
collected" - it's assumed that in normal usage the set of event
subscriptions will be small enough. Possibly lower than before, as we
will not set up the disk event subscription unless it's actually used.

GitHub-Pull-Request: https://github.com/syncthing/syncthing/pull/4092
This commit is contained in:
Jakob Borg
2017-04-13 17:14:34 +00:00
committed by Audrius Butkevicius
parent 75460be98d
commit d48e46a29c
4 changed files with 149 additions and 19 deletions
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10
cmd/syncthing/main.go
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@@ -637,8 +637,8 @@ func syncthingMain(runtimeOptions RuntimeOptions) {
// Event subscription for the API; must start early to catch the early
// events. The LocalChangeDetected event might overwhelm the event
// receiver in some situations so we will not subscribe to it here.
apiSub := events.NewBufferedSubscription(events.Default.Subscribe(events.AllEvents&^events.LocalChangeDetected&^events.RemoteChangeDetected), 1000)
diskSub := events.NewBufferedSubscription(events.Default.Subscribe(events.LocalChangeDetected|events.RemoteChangeDetected), 1000)
defaultSub := events.NewBufferedSubscription(events.Default.Subscribe(defaultEventMask), eventSubBufferSize)
diskSub := events.NewBufferedSubscription(events.Default.Subscribe(diskEventMask), eventSubBufferSize)
if len(os.Getenv("GOMAXPROCS")) == 0 {
runtime.GOMAXPROCS(runtime.NumCPU())
@@ -868,7 +868,7 @@ func syncthingMain(runtimeOptions RuntimeOptions) {
// GUI
setupGUI(mainService, cfg, m, apiSub, diskSub, cachedDiscovery, connectionsService, errors, systemLog, runtimeOptions)
setupGUI(mainService, cfg, m, defaultSub, diskSub, cachedDiscovery, connectionsService, errors, systemLog, runtimeOptions)
if runtimeOptions.cpuProfile {
f, err := os.Create(fmt.Sprintf("cpu-%d.pprof", os.Getpid()))
@@ -1086,7 +1086,7 @@ func startAuditing(mainService *suture.Supervisor, auditFile string) {
l.Infoln("Audit log in", auditDest)
}
func setupGUI(mainService *suture.Supervisor, cfg *config.Wrapper, m *model.Model, apiSub events.BufferedSubscription, diskSub events.BufferedSubscription, discoverer discover.CachingMux, connectionsService *connections.Service, errors, systemLog logger.Recorder, runtimeOptions RuntimeOptions) {
func setupGUI(mainService *suture.Supervisor, cfg *config.Wrapper, m *model.Model, defaultSub, diskSub events.BufferedSubscription, discoverer discover.CachingMux, connectionsService *connections.Service, errors, systemLog logger.Recorder, runtimeOptions RuntimeOptions) {
guiCfg := cfg.GUI()
if !guiCfg.Enabled {
@@ -1097,7 +1097,7 @@ func setupGUI(mainService *suture.Supervisor, cfg *config.Wrapper, m *model.Mode
l.Warnln("Insecure admin access is enabled.")
}
api := newAPIService(myID, cfg, locations[locHTTPSCertFile], locations[locHTTPSKeyFile], runtimeOptions.assetDir, m, apiSub, diskSub, discoverer, connectionsService, errors, systemLog)
api := newAPIService(myID, cfg, locations[locHTTPSCertFile], locations[locHTTPSKeyFile], runtimeOptions.assetDir, m, defaultSub, diskSub, discoverer, connectionsService, errors, systemLog)
cfg.Subscribe(api)
mainService.Add(api)