Forwarding Request Parameters from Inbound Gateway to Outbound Gateway

[amitso]

Hi,

I am using Spring 3.0.6 and Integration 2.1.0 M3.

I am forwarding one request from Inbound Gateway to outbound gateway. I want to forward query string (request parameters) with this request. Following is my implementation.

I am calling my inbound gateway with

http://localhost:8080/RestSampleProj...121?abc=454545

I am able to access value 12121 as a path variable, but I am not able to forward value of variable "abc" to the business componenet (outbound gateway)

Please help.

	<int-http:inbound-gateway id="findLogsInboundGateway" payload-expression="#requestParams"
					request-channel="getLogsByVendorInChannel"
					reply-channel="getLogsByVendorOutChannel"
					name="/fetchAllLogs/{vendor}"
					path="/fetchAllLogs/{vendor}"                          
					supported-methods="GET">
		<int-http:header name="vendor" expression="#pathVariables.vendor"/>
		<int-http:header name="params" expression="#requestParams"/>
	</int-http:inbound-gateway>
                          
    <int-http:outbound-gateway id="findLogsoutboundGateway"
                           url="http://localhost:8080/BusinessSampleProject/fetchAllLogs/{vendor}"
                           http-method="GET" mapped-request-headers="params" 
                           request-channel="getLogsByVendorInChannel"
                           reply-channel="getLogsByVendorOutChannel"
                           expected-response-type="java.lang.String"
                           charset="UTF-8" 
                           >
		<int-http:uri-variable name="vendor" expression="headers.vendor"/>
    </int-http:outbound-gateway>

[Mark Fisher]

The 'mapped-request-headers' attribute is actually for setting values of HTTP headers on the request (not query params). If you want to pass the query params as-is, then you could use the {placeholder} syntax in the URL, but then you would need to set its value to the query *string* (not the the same as #requestParams which contains a map). For that, you could use the header whose key is HttpHeaders.REQUEST_URL, or you could rely on the fact that the default request payload for a GET on an inbound-gateway is the request param Map itself.

Hope that helps.
-Mark