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Showing posts from December, 2017

WSO2 ESB/EI Callout Mediator Error Scenario

When using WSO2 Enterprise Service Bus, you can use Call, Send and Callout mediators to invoke a service. If you are calling multiple service calls within your meditation sequence, you have to use either Call mediator or Callout mediator.

As per the documentation, WSO2 Team is recommending to use Call mediator instead of the Callout mediator, due to much better performance. However, due to some legacy requirements, we might need to stay with Callout mediator for the time being.

In my use case, there are some mediation scenarios with mutual SSL. So if you have noticed an "UnrecoverableKeyException: Password verification failed" exception in the WSO2Carbon log file and terminal when invoking an endpoint(backend service) using callout mediator, I would recommend you to check the Java SSL keyStore Password(values of the javax.net.ssl.keyStorePassword and javax.net.ssl.trustStorePassword environment variables) in  the /bin/wso2server.sh file or relevant location.

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WSO2 ESB/EI Send XML content to backend

When sending XML content inside the payload to the backend via WSO2 ESB,  we have to encode it and send it. In my usecase,  I have a Data Service which is accepting XML content as a parameter.

To implement this requirement, we can't directly define CDATA(blocks of text that are not parsed by XML parser) inside the payload factory mediator. So we have two option to do so.

The first option is that Encode XML content using Script mediator and use encoded value inside the payload factory mediator. You can read Hasitha's blog on this topic.

The second option is storing the format section of the payload factory mediator, in the registry. There you can directly define the CDATA tags inside the XML content stored in the registry. This allows you to define  CDATA inside payload factory mediator.

An example usecase is as below:

PayloadFacroy Mediator:

<?xml version="1.0" encoding="UTF-8"?><payloadFactorymedia-type="xml"><formatkey="conf:/…