Conditional Error handling

Question

This is my use case
My proxy will call a business service which will call the DB and execute a SP . The SP will return 1-* rows. Assume the rows have 10 columns. The 10th column is the status. even if there is some functional error the SP will return 1 row with the 10th columns populated.
This is the possible values of the 10th column (Status)
OK, E1, E2,E3, D
OK - Output is ok . I will transform the output and call another BS to insert into another DB
D- Discard . just skip the message flow . no need to insert into the DB.
E1 ,E2- Retry 2 more time with an interval of 1 min. but I need to log the original body
E3 - Retry 2 more time with an interval of 1 min. but I do not need to log.
I have created 2 proxies and 2 BS.
P1 -> P2 - > BS1. For the service callout of P2 from P1 I have set the routing option for Retrycount = 2 , retyinterval=60 secs.
P2 will call BS1 and check the output Row1 and column 10 index and based on that it will do the following. For E1,E2,E3 it will raise Error with Error code E0001, E0002, E0003 . For D and OK it changes the body accordingly.
In P1, I put and if condition to validate the return of P2. For OK I call BS2, For D I call the Skip action
For E1,E2 and E3 they get trapped in the Stage error of P1.
Everything works fine till here, but how do I identify in stage1 error handler if the error is caused by E0001 or E0002 or E0003 so I can log the original body and log the cause of the error is E0001 or E0002 ???
regards

Answer 1

This is the $fault output
<con:fault      xmlns:con="http://www.bea.com/wli/sb/context">
     <con:errorCode>BEA-382502</con:errorCode>
     <con:reason>
     OSB Service Callout action received an error response
     </con:reason>
     <con:details>
     <con1:ErrorResponseDetail      xmlns:con1="http://www.bea.com/wli/sb/stages/transform/config"/>
     </con:details>
     <con:location>
     <con:node>PipelinePairNode1</con:node>
     <con:pipeline>PipelinePairNode1_request</con:pipeline>
     <con:stage>stage1</con:stage>
     <con:path>request-pipeline</con:path>
     </con:location>
     </con:fault>
It does not give me the Error code which is raised in my service callout proxy.
Let me try and simply my scenario.
Proxy 1 calls Proxy2 by service callout . Proxy 2 based on certain error condition will raise error code like E0001 , E0002 etc..
In Proxy 1 Error handler, I want to find out if the error is caused because of E0001 or E0002. How can I achieve this ?. I have posted Proxy 1 $fault variable which outputs a generic error message.