Conditional Branch Node in OSB

Question

Hi There,
I'm trying to set a Conditional Branch in the beginning of my Proxy Service, i'm trying to compare to fields of the body, but when i build the xpath to compare this 2 fields i'm obtaining a compilation error.
My xpath line is :
fn:compare(./cre:Trace_PM/trac:Trace_PM/trac:traceLevel/text(), ./cre:Trace_PM/cre:Level/text())
And the error is :
XPath expression invalid, not a selection: declare namespace trac = 'http://www.ferrovial.es/XSD/Trace';
declare namespace cre = 'http://www.ferrovial.es/XSD/CreateTrace_PM';
declare namespace jca = 'http://www.bea.com/wli/sb/transports/jca';
declare namespace wsp = 'http://schemas.xmlsoap.org/ws/2004/09/policy';
declare namespace jms = 'http://www.bea.com/wli/sb/transports/jms';
declare namespace wsa05 = 'http://www.w3.org/2005/08/addressing';
declare namespace tp = 'http://www.bea.com/wli/sb/transports';
declare namespace jejb = 'http://www.bea.com/wli/sb/transports/jejb';
declare namespace xs = 'http://www.w3.org/2001/XMLSchema';
declare namespace sftp = 'http://www.bea.com/wli/sb/transports/sftp';
declare namespace flow = 'http://www.bea.com/alsb/flow/transport';
declare namespace soap-env = 'http://schemas.xmlsoap.org/soap/envelope/';
declare namespace wsu = 'http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd';
declare namespace dsp = 'http://www.bea.com/dsp/transport/sb';
declare namespace ejb = 'http://www.bea.com/wli/sb/transports/ejb';
declare namespace wsa = 'http://schemas.xmlsoap.org/ws/2004/08/addressing';
declare namespace bpel-10g = 'http://www.bea.com/wli/sb/transports/bpel10g';
declare namespace tuxedo = 'http://www.bea.com/wli/sb/transports/tuxedo';
declare namespace file = 'http://www.bea.com/wli/sb/transports/file';
declare namespace ctx = 'http://www.bea.com/wli/sb/context';
declare namespace fn = 'http://www.w3.org/2004/07/xpath-functions';
declare namespace soap12-enc = 'http://www.w3.org/2003/05/soap-encoding';
declare namespace soap12-env = 'http://www.w3.org/2003/05/soap-envelope';
declare namespace fn-bea = 'http://www.bea.com/xquery/xquery-functions';
declare namespace ws = 'http://www.bea.com/wli/sb/transports/ws';
declare namespace soa-direct = 'http://www.bea.com/wli/sb/transports/soa';
declare namespace http = 'http://www.bea.com/wli/sb/transports/http';
declare namespace email = 'http://www.bea.com/wli/sb/transports/email';
declare namespace ftp = 'http://www.bea.com/wli/sb/transports/ftp';
declare namespace sb = 'http://www.bea.com/wli/sb/transports/sb';
declare namespace xsd = 'http://www.w3.org/2001/XMLSchema';
declare namespace soap-enc = 'http://schemas.xmlsoap.org/soap/encoding/';
declare namespace xsi = 'http://www.w3.org/2001/XMLSchema-instance';
fn:compare(./cre:Trace_PM/trac:Trace_PM/trac:traceLevel/text(), ./cre:Trace_PM/cre:Level/text()).
I was checking in the forum and i found a similiar issue but i saw that it was not answered. Do you know which is the reason to this issue in conditional branchs on OSB?
Regards
Yuri

Answer 1

Hi Yuri,
From the OSB documentation -
Conditional branching is driven by a lookup table with each branch tagged with a simple, but unique, string value. A variable in the message context is designated as the lookup variable for that node, and at run time, its value is used to determine which branch to follow. If no branch matches the value of the lookup variable, the default branch is followed. You should design the proxy service in such a way that the value of the lookup variable is set before reaching the branch node.Does your case fulfill above criteria? Please let us know your use case in detail.
Regards,
Anuj