I’m developing a custom Access Control plugin using MIP SDK for integrating our third-party access control system
(Database-based) with XProtect. The plugin is working — events are fired via FireEventsOccurred(), they appear in both
the Access Control Events tab and Alarm Manager — but only when I switch tabs. They do not appear in real-time.
What’s Working
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Plugin loads successfully on Event Server
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Configuration fetches correctly (doors, event types, access points)
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FireEventsOccurred() is called for each event (confirmed via logs)
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Events appear in Access Control → Events tab (after tab switch)
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Alarms appear in Alarm Manager (after tab switch)
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Alarm Definitions are correctly configured (Triggering event: Access Control Event Categories → Alert, Sources: All
doors)That’s NOT Working
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Events/Alarms do not auto-refresh or appear in real-time
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User must switch to another tab and come back to see the new events
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“Live Update” mode in the Access Control tab does not help
Plugin Architecture
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Runs on Event Server as an AC plugin (ACSystem, ACEventManager, etc.)
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Polls external web service every 2 seconds for new events
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Fires events one-by-one (not batched) via FireEventsOccurred(new { acEvent })
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Uses Task.Run + async/await + Task.Delay (same pattern as DemoAccessControlPlugin)
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Uses Guid.NewGuid().ToString() for unique event IDs
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Uses DateTime.UtcNow for timestamps
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Calls FireStatesInvalidated(null) on connect
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Fires ServerConnected event on connect
Custom log file Path for our AC Plugin
Log Output (Events ARE being processed)2026-03-20 18:13:47.203 [INFO] ACConfiguration created successfully.
2026-03-20 18:13:47.204 [INFO] Fetched 2 doors, 308 event types, 6 command types.
2026-03-20 18:14:12.145 [INFO] Web service connection test successful.
2026-03-20 18:14:12.167 [INFO] Built MachineID->DoorID cache with 2 entries.
2026-03-20 18:14:12.167 [INFO] Event polling started.
2026-03-20 18:14:12.195 [INFO] State monitoring started. Initialized 2 door states.
2026-03-20 18:14:12.204 [INFO] Server Connected event fired.
2026-03-20 18:14:12.204 [INFO] Connected successfully.
2026-03-20 18:16:12.374 [INFO] Processed 1 events.
2026-03-20 18:16:16.446 [INFO] Processed 1 events.
2026-03-20 18:17:29.119 [INFO] Processed 1 events.
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Access Control tab — Latest Events appear only after switching tabs:
Environment
- Milestone XProtect Management Client version 2025 R3(v25.3a)
- Milestone XProtect Smart Client 2025 R3
- .NET Framework: 4.7
- Smart Client and Event Server on the same machine.
Any guidance would be greatly appreciated.
Thank you
