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This sample demonstrates the real-time analytics features of WSO2 BAM, by using the integrated WSO2 CEP features.

Creating an event stream

Follow the steps below to create a new event stream.

  1. Log in to the WSO2 BAM management console.
  2. Click Main, and then click Event Streams.
  3. Click Add Event Stream.
  4. Enter org.wso2.sample.rt.traffic for Event Stream Name, and enter 1.0.0 for Event Stream Version.
  5. Enter the following values for Payload Data Attributes under Stream Attributes and click Add.
     
    • Attribute Name  entry
    • Attribute Type string
  6. Click Add Event Stream.
  • Create HTTP event output adaptor:- Configure -> Event Processor Configs -> Output Event Adaptors -> Name="HTTP" -> Type="http" -> Add Event Adaptor
  • Create a new execution plan:- name="rt_traffic_plan", import stream="traffic_sample_stream:1.0.0", as "traffic" -> Import
    • Query Expression="from traffic#window.time(1 sec) select count(entry) as entryCount insert into traffic_out;"
    • Export Stream, value of="traffic_out", streamId="–Create Stream Definition–" -> Use defaults -> Select "traffic_out:1.0.0"
      • Event Formatter -> "Custom Event Formatter"
        • Event formatter; name="rt_traffic_formatter", stream="traffic_out:1.0.0", output event adaptor="http_adaptor", output mapping="text"
        • output event adaptor name="HTTP"
        • output mapping content="{{entryCount}}"
        • url="https://localhost:9443/message_store?type=RT_SAMPLE_STATS"
        • username="admin", password="admin"
      • Add
  • Goto the BAM admin console, and goto "BAM Toolbox" -> Add -> Realtime Traffic Monitoring Toolbox -> Install
  • After the above actions are done, from a command line console, navigate to $BAM_SERVER/samples/rt-traffic, and type "ant". This will start executing a data publisher, and will be sending data continuously, the data rate of the items published here is happening randomly.
  • Navigate to "https://$host:9443/bamdashboards/rt_traffic/stats.jag" (here $host must be the exact host the server has started up, testing with "localhost" may not work, because of browser cross domain limitations). Now here, you will see a line graph being updated in real-time to show the frequency of the messages being published at that time.


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