I’m encountering an issue while configuring custom message builders and formatters in WSO2 Integration Studio (or WSO2 Carbon). I have followed the steps to add a custom message builder (org.wso2.carbon.integrator.core.json.JsonStreamBuilder) and formatter (org.wso2.carbon.integrator.core.json.JsonStreamFormatter) for handling application/problem+json content type in both deployment.toml and axis2.xml.
After making these configurations and restarting the server, I’m facing the following error:
`WSO2 Carbon initialization Failed org.apache.axis2.AxisFault: Exception occurred while loading the Axis configuration from /path/to/axis2.xml
Caused by: org.apache.axis2.deployment.DeploymentException: A ClassNotFoundException error occurred while validating the message builder org.wso2.carbon.integrator.core.json.JsonStreamBuilder
Caused by: java.lang.ClassNotFoundException: org.wso2.carbon.integrator.core.json.JsonStreamBuilder cannot be found by axis2_1.6.1.wso2v85
`
Steps Token:
- Added the following configurations to deployment.toml:
Steps Token:
[[custom_message_formatters]]
class = "org.wso2.carbon.integrator.core.json.JsonStreamFormatter"
content_type = "application/problem+json"
[[custom_message_builders]]
class = "org.wso2.carbon.integrator.core.json.JsonStreamBuilder"
content_type = "application/problem+json"
- Updated axis2.xml to include references to the custom message builder and formatter:
<messageBuilders>
<builder contentType="application/problem+json" class="org.wso2.carbon.integrator.core.json.JsonStreamBuilder"/>
<!-- Other message builders -->
</messageBuilders>
<messageFormatters>
<formatter contentType="application/problem+json" class="org.wso2.carbon.integrator.core.json.JsonStreamFormatter"/>
<!-- Other message formatters -->
</messageFormatters>
Error Details:
- Error Message: WSO2 Carbon initialization Failed org.apache.axis2.AxisFault: Exception occurred while loading the Axis configuration from /path/to/axis2.xml
- Caused by: org.apache.axis2.deployment.DeploymentException: A ClassNotFoundException error occurred while validating the message builder
- org.wso2.carbon.integrator.core.json.JsonStreamBuilder
Caused by: java.lang.ClassNotFoundException: org.wso2.carbon.integrator.core.json.JsonStreamBuilder cannot be found by axis2_1.6.1.wso2v85
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Your class names are wrong. Try setting the following. The correct builder class is the below. Also don’t change the axis2.xml add the below to delpoyment.toml
[[custom_message_formatters]]
class = "org.wso2.micro.integrator.core.json.JsonStreamFormatter"
content_type = "application/problem+json"
[[custom_message_builders]]
class = "org.wso2.micro.integrator.core.json.JsonStreamBuilder"
content_type = "application/problem+json"