This section explains, through an example scenario, how the Event Message EIP can be implemented using the ESB profile of WSO2 EI. The following topics are covered:
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<?xml version="1.0" encoding="UTF-8"?>
<definitions xmlns="http://ws.apache.org/ns/synapse">
<proxy name="EventMessageProxy" transports="https http" startOnLoad="true" trace="disable">
<target>
<inSequence>
<event topic="stockquote" />
</inSequence>
<outSequence>
<send />
</outSequence>
</target>
</proxy>
</definitions> |
How the implementation works
Let's investigate the elements of the configuration in detail. The line numbers below are mapped with the configuration shown above.
- Event [line 12 of config] - Sends incoming events to the topics that you created earlier.
Simulating the sample scenario
Now, let's try out the sample scenario explained above.
Setting up the environment
- Download the
Event-Message_1.0.0.zip, which includes the artifacts of this sample and follow the steps in Setting up the EnvironmentSimulating a Sample Scenario. - Follow the steps below to create an event.
- Start the ESB profile and log into its Management Console. For instructions, see Starting the ESB profile in WSO2 EI Documentation.
- Select the Topics menu from the Main menu, and then select the Add sub menu.
- Enter the name
stockquotefor the topic and then click Add Topic. - In the Topic Browser tree, click the newly created
stockquotetopic and then click Subscribe to create a static subscription. - Enter the value
http://localhost:9000/services/SimpleStockQuoteServicein the Event Sink URL field and click Subscribe. - Repeat these steps to add another subscriber in port 9001.
Executing the sample
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