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package api |
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import ( |
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"net/http" |
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"runtime" |
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"time" |
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) |
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type metricsResponse struct { |
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Timestamp string `json:"timestamp"` |
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Runtime runtimeMetrics `json:"runtime"` |
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Bridge *bridgeMetrics `json:"bridge,omitempty"` |
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Registry registryMetrics `json:"registry"` |
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} |
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type runtimeMetrics struct { |
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Goroutines int `json:"goroutines"` |
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HeapAlloc uint64 `json:"heap_alloc_bytes"` |
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HeapSys uint64 `json:"heap_sys_bytes"` |
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GCRuns uint32 `json:"gc_runs"` |
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} |
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type bridgeMetrics struct { |
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Channels int `json:"channels"` |
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MessagesTotal int64 `json:"messages_total"` |
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ActiveSubs int `json:"active_subscribers"` |
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} |
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type registryMetrics struct { |
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Total int `json:"total"` |
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Active int `json:"active"` |
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Revoked int `json:"revoked"` |
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} |
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func (s *Server) handleMetrics(w http.ResponseWriter, r *http.Request) { |
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var ms runtime.MemStats |
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runtime.ReadMemStats(&ms) |
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resp := metricsResponse{ |
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Timestamp: time.Now().UTC().Format(time.RFC3339), |
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Runtime: runtimeMetrics{ |
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Goroutines: runtime.NumGoroutine(), |
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HeapAlloc: ms.HeapAlloc, |
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HeapSys: ms.HeapSys, |
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GCRuns: ms.NumGC, |
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}, |
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} |
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if s.bridge != nil { |
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st := s.bridge.Stats() |
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resp.Bridge = &bridgeMetrics{ |
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Channels: st.Channels, |
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MessagesTotal: st.MessagesTotal, |
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ActiveSubs: st.ActiveSubs, |
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} |
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} |
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agents := s.registry.List() |
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for _, a := range agents { |
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resp.Registry.Total++ |
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if a.Revoked { |
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resp.Registry.Revoked++ |
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} else { |
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resp.Registry.Active++ |
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} |
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} |
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writeJSON(w, http.StatusOK, resp) |
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} |
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