Chapter 3. Creating the HA CEP client

Procedure

1. Download the rhdm-7.5.1-reference-implementation.zip product deliverable file from the Software Downloads page of the Red Hat Customer Portal.
2. Extract the contents of the file and then uncompress the rhdm-7.5.1-openshift-drools-hacep-distribution.zip file.
3. Change to the openshift-drools-hacep-distribution/sources directory.
4. Review and modify the client code based on the sample project in the sample-hacep-project/sample-hacep-project-client directory. Ensure that the code fulfills the additional requirements described in Chapter 4, Requirements for HA CEP client code.

5. In the sample-hacep-project/sample-hacep-project-client directory, generate a keystore, using password as a password. Enter the following command:

   keytool -genkeypair -keyalg RSA -keystore src/main/resources/keystore.jks

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6. Extract the HTTPS certificate from the OpenShift environment and add it to the keystore. Enter the following commands:

   oc extract secret/my-cluster-cluster-ca-cert --keys=ca.crt --to=- > src/main/resources/ca.crt
   keytool -import -trustcacerts -alias root -file src/main/resources/ca.crt -keystore src/main/resources/keystore.jks -storepass password -noprompt

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7. In the src/main/resources subdirectory of the project, create a configuration.properties file with the following content:

   ssl.keystore.location=keystore.jks
   ssl.truststore.location=keystore.jks
   ssl.keystore.password=password
   ssl.truststore.password=password
   bootstrap.servers=http://<serveraddress>

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   Replace <serveraddress> with the address that the route for the Kafka server uses.

8. Build the project using the standard Maven command:

   mvn clean install

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9. Change the sample-hacep-project-client project directory and enter the following command to run the client:

   mvn exec:java -Dexec.mainClass="org.kie.hacep.sample.client.ClientProducerDemo

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   This command executes the main method of the ClientProducerDemo class.