Overview of the Oracle CEP Visualizer Dashboard

Overview of Oracle CEP Visualizer 1-5 Figure 1–2 Oracle CEP Visualizer Dashboard The dashboard has two main sections: ■ Management Events : the section at the top of the dashboard displays information and warning messages about the incoming monitoring events. Click the Warning bar to view the list of warning messages; click the Information bar to view the list of information messages. The Oracle CEP Visualizer monitoring feature defines a set of default EPL rules that specify when these alerts show up in the Management Events table; you can change the EPL rules to customize this behavior; see Section 7.4, Changing the dataservices Application Event Filter Rule Using EPL . ■ Performance Monitoring : the latency and throughput graphs display the amount of time it takes an event to pass through the specified stage or path in the EPN or the number of events passing through, respectively. The stage or path is defined in the diagnostic profile. The table at the bottom lists the available diagnostic profiles; when you click on a particular profile, the corresponding latency and throughput information is displayed in the graphs. See Section 4.6, Monitoring the Throughput and Latency of a Stage or Path in the EPN for details. For detailed instructions on how to use this monitoring feature, see Section 4.6, Monitoring the Throughput and Latency of a Stage or Path in the EPN .

1.2.5 Overview of the Stream Visualizer ViewStream Panel

The main purpose of the ViewStream panel is to allow users to watch events being published to a given HTTP publish-subscribe channel without any additional work. This is useful for debugging your application or just monitoring events flowing through the EPN. Click the ViewStream button in the top panel of Oracle CEP Visualizer, to display the Stream Visualizer panel as Figure 1–3 shows. 1-6 Oracle Complex Event Processing Visualizer Users Guide Figure 1–3 Oracle CEP Visualizer Stream Visualizer ViewStream The PubSub Server URL text box displays the HTTP pub-sub server URL included with Oracle CEP. Click the Initialize Client button to start the process. You can either subscribe or publish a message to a channel using the options mentioned in this panel. You can subscribe to a user or internal channel and view the events on it or you can publish to a user or internal channel. For more information, see: ■ Section 4.4, Tracing and Injecting Events in the EPN ■ Chapter 14, Managing HTTP Publish-Subscribe Servers

1.2.6 Overview of the Event Processing Network

The main purpose of the Event Processing Network EPN panel is to give users an overall view of the stages in an Oracle CEP application and the various event types they produce and consume. In the left pane, navigate to and expand the Applications node, select an application, and in the right pane, click the Event Processing Network tab to view the EPN as Figure 1–4 shows.