Set spring integration header into soap header in spring integration (without interceptor/ threadlocal) - spring

Question

Is there anyway to set SOAP-ENV header in spring integration xml from spring integration headers ?
I tried below approach and expected bId to be populated to soap headers
<int:chain id="soapcall" input-channel="soapchannel">
<int-xml:header-enricher>
<int-xml:header name="bId" expression="headers['bId']"/>
</int-xml:header-enricher>
<int-ws:outbound-gateway uri="${soap.url}" interceptor="myInterceptor">
</int-ws:outbound-gateway>
</int:chain>
However Actual output doesn't have the header. see below:
<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/"
xmlns:n1="http://namespace/n1">
<SOAP-ENV:Header/>
<SOAP-ENV:Body> ...
</SOAP-ENV:Body>
</SOAP-ENV:Envelope>
I also looked into below approach inside chain before calling outbound gateway. It seems this header enricher takes only soap action as header. So this throws exception action headers not found
<int-ws:header-enricher >
<int-ws:soap-action expression="headers['bId']"/>
</int-ws:header-enricher>
I also looked into this post. But I couldn't get this compiled inside a chain.

Answer 1

I'm not sure what is the <int-xml:header-enricher>, but it doesn't matter.
What you need is called header-mapper on the <int-ws:outbound-gateway>.
Its code looks like:
#Override
protected void populateStandardHeaders(Map<String, Object> headers, SoapMessage target) {
String soapAction = getHeaderIfAvailable(headers, WebServiceHeaders.SOAP_ACTION, String.class);
if (!StringUtils.hasText(soapAction)) {
soapAction = "\"\"";
}
target.setSoapAction(soapAction);
}
#Override
protected void populateUserDefinedHeader(String headerName, Object headerValue, SoapMessage target) {
SoapHeader soapHeader = target.getSoapHeader();
if (headerValue instanceof String) {
QName qname = QNameUtils.parseQNameString(headerName);
soapHeader.addAttribute(qname, (String) headerValue);
}
}
So, by default it maps WebServiceHeaders.SOAP_ACTION as a standard one, and all those user defined if they are String and only as attribute of the target SOAP-ENV:Header element.
Those user defined headers can be mapped by the:
<xsd:attribute name="mapped-request-headers" type="xsd:string">
<xsd:annotation>
<xsd:documentation><![CDATA[
Comma-separated list of names of SOAP Headers to be mapped from the SOAP request into the MessageHeaders.
This can only be provided if the 'header-mapper' reference is not being set directly. The values in
this list can also be simple patterns to be matched against the header names (e.g. "foo*" or "*foo").
]]></xsd:documentation>
</xsd:annotation>
</xsd:attribute>
If you need to populate sub-elements to the <SOAP-ENV:Header>, you don't have choice unless extend DefaultSoapHeaderMapper and override that populateUserDefinedHeader() and use SoapHeader.addHeaderElement() API.
Also look into the Reference Manual.