The topology visualization contains a graph that consists of:
Larger publisher/subscriber nodes with the publisher or subscriber names.
Arrows that show the data flow between a publisher and a subscriber.
Connection nodes marking the status of the data flow.
The larger topology nodes containing the names are either subscribers or publishers, for example; applications containing either subscriber or publisher functionality.
The larger topology nodes:
Publishers are marked with a P: prefix.
Subscribers are marked with an S: prefix.
Certain applications, for example Event Analytics and M3BODProcessor, act both as a publisher and as a subscriber. These are marked with a PS: prefix.
The status of the publishers and subscribers is marked with a color.
The red color marks that the publisher or subscriber is not connected to Event Hub.
The green color marks that everything is OK with a publisher or a subscriber.
The yellow color marks that a publisher or a subscriber is paging.
When you click a subscriber or a publisher node, a window containing additional status information is displayed:
Subscriber status: OK, disconnected, paging.
Publisher status: OK, disconnected, paging.
Subscriber queued: Number of events in the queue.
Publisher queued: Number of events in the queue.
Subscriber last seen: The timestamp when the subscriber was last connected to Event Hub.
Publisher last seen: The timestamp when the publisher was last connected to Event Hub.
In addition, detailed error messages are displayed at the bottom of the window.
The arrows that connect subscribers and publishers have a smaller connection node, the color of which marks the status of the data flow between a publisher and a subscriber.
You can click the connection node to see which events are transmitted through the particular connection.
The window provides this information:
Document: The name of the published event.
Operations: Any combination of the operations supported by Event Hub, for example Create, Update. A tool-tip containing the detailed operation names is available when you move the pointer over the operations list.
Rule: A rule name for a rule subscribing for a particular document is available for Event Analytics connections.
Right-click the connection node to access a context menu. The available options are described in Event Recording.