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Event publishers publish events processed by the WSO2 servers to external applications. These events are published via HTTP, Kafka, JMS, etc. in JSON, XML, Map, text, and WSO2Event formats  to various endpoints and data stores.

In this step, you will create an event publisher named loggerPublisher to publish events from the event stream named  org.wso2.event.sensor.stream that was created in Step 1. Since the output event adapter type of this publisher is logger, the events published will be logged in the CEP CLI in text format via HT. The publisher can be created using the Management Console as follows.

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1. Log into the CEP Management Console and click on the Main tab. Under Manage, click Publishers to open the Available Publishers page.
2. Click Add Event Publisher to open the Create a New Event Publisher page.

3. Enter information as follows to create the new event publisher named UIPublisher.
   

   Parameter Name	Description
   Event Publisher Name	uiPublisher
   Event Source	org.wso2.event.sensor.filtered.stream:1.0.0
   Output Event Adapter Type	ui
   Message Format	wso2event

4. Click Add Event Publisher to save the information.

Step 9: Create a dashboard and a gadget

WSO2 Analytics Dashboard will be used as the tool to analyse the output of the event flow you created in this guide. This step creates a dashboard and a gadget which analyses events from the  org.wso2.event.sensor.filtered.stream stream published by the uiPublisher publisher.

1. Log into the CEP Management Console. In the Main tab, click Analytics Dashboard.
2. Log into the Analytics Dashboard with your username and password.
3. Click the menu icon and then click Gadgets to open the Gadgets page as demonstrated below.
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4. Click GENERATE GADGET, and enter values in the Generate a Gadget wizard as follows.Image Modified
   
   1. In the Select Provider field, select Realtime Data Source. Then click Next.
   2. In the Event Stream field, select org.wso2.event.sensor.filtered.stream:1.0.0. Then click Next.

   3. Configure a chart as follows.

      Parameter Name	Value
      Gadget Name	Sensor Value VS Timestamp
      Select Chart Type	Line Chart
      X-Axis	TIMESTAMP
      X type	time
      Y-Axis	sensorValue
      Y type	default
      Color domain	sensorName
      Max length	30

   4. Click Add to Store, and then click Go to Portal. the Dashboards page appears again.
5. Click CREATE DASHBOARD to open the Create a Dashboard page. Configure a new dashboard as follows.Image Modified

   1. Enter a name and a description for the new dashboard as follows, and click Next.
      

      Parameter Name	Value
      Name of your Dashboard	Sensor Statistics
      Description	This dashboard indicates the sensor value at different times in a particular location.

   2. Select the Single Column layout. A message appears to indicate that the dashboard is successfully created.
   3. Click the  icon for gadgets. Then select and drag Sensor Value VS Timestamp gadget to the first column as demonstrated above.

Step 10: Send Events to the HTTP Receiver via Curl Command

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