WSO2 ESB

WSO2 ESB Learnings

To get HTTP Status code in a sequence
<property name="httpSc"  expression="$axis2.HTTP_SC" />

Custom  Make Fault in WSO2
1. Build payload factory with ERROR_CODE and ERROR_MESSAGE set by ESB when error occurs in mediation.<payloadFactory media-type="xml">
   <format>
      <Errors xmlns="http://wso2.com/make/fault">
         <Error>
            <ErrorCode>$1</ErrorCode>
            <ErrorMessage>$2</ErrorMessage>
         </Error>
      </Errors>
   </format>
   <args>
      <arg evaluator="xml" expression="get-property('ERROR_CODE')" />
      <arg evaluator="xml" expression="get-property('ERROR_MESSAGE')" />
   </args>

</payloadFactory>

2.Extract the "Errors" node and store in property as of type "OM" element.
<property xmlns:e="http://wso2.com/make/fault" name="ERRORS" expression="//e:Errors"  type="OM"/>

3. Build "makefault" and add the "ERRORS" property to detail tag.
<makefault version="soap11">
   <code xmlns:soap11="http://schema.xml.soap.org/soap/envelope" value="soap11:Server" />
   <reason expression="get-property('ERROR_DETAIL')" />
   <role>None</role>
   <detail expression="get-property('ERRORS')" />
</makefault>

Access Parameters from axis2.xml inside custom mediator.
Locaion of axis2.xml in WSO2 ESB : /repository/conf/axis2/axis2.xml
 Parameter entry inside axis2.xml
<parameter name="TransactionManagerJNDIName">TransactionManager</parameter>
Access the parameter defined in axis2.xml inside custom mediator as
public boolean mediate(MessageContext messageContext) {

String transManager= messageContext.getConfigurationContext().getAxisConfiguration()
. getParameter("TransactionManagerJNDIName").getValue().toString();

}

To get ip address or host of client who sent request to WSO2 ESB in a Sequence

<property name="clientIp" expression="get-property('axis2', 'REMOTE_ADDR')"/>

<property name="clientHost" expression="get-property('axis2', 'REMOTE_HOST')"/> 

If request reaches ESB via Proxy

<property name="clientHost" expression="$trp:X-Forwarded-For"/>

Remote Debugging

1,  Navigate to <<WSO2ESBHOME>>/bin and Start the WSO2 ESB server using the following command.

> wso2server.bat -debug 5005

where 5005 is the port.

2.

Property Scopes


XPATH functions Used 

    concat