## Apache Synapse

## Sample 433: Callout Mediator - Invoke a service using a defined Endpoint

<definitions xmlns="http://ws.apache.org/ns/synapse"> <sequence name="main"> <callout> <endpoint key="StockQuoteServiceEndpoint"/> <source xmlns:s11="http://schemas.xmlsoap.org/soap/envelope/" xmlns:s12="http://www.w3.org/2003/05/soap-envelope" xpath="s11:Body/child::*[fn:position()=1] | s12:Body/child::*[fn:position()=1]"/> <target xmlns:s11="http://schemas.xmlsoap.org/soap/envelope/" xmlns:s12="http://www.w3.org/2003/05/soap-envelope" xpath="s11:Body/child::*[fn:position()=1] | s12:Body/child::*[fn:position()=1]"/> </callout> <respond/> </sequence> <endpoint name="StockQuoteServiceEndpoint"> <address uri="http://localhost:9000/services/SimpleStockQuoteService"/> </endpoint> </definitions>

### Objective

Demonstrate how to invoke a service from Callout Mediator using a defined endpoint.

### Pre-requisites

- Deploy the SimpleStockQuoteService in the sample Axis2 server and start Axis2
- Start Synapse using the configuration numbered 433 (repository/conf/sample/synapse_sample_433.xml)
  Unix/Linux: sh synapse.sh -sample 433
  Windows: synapse.bat -sample 433

### Executing the Client

In this sample, the Callout mediator does the direct service invocation to the StockQuoteService using the client request, gets the response and sets it as the first child of the SOAP message body. Callout Mediator uses the defined endpoint named 'StockQuoteServiceEndpoint' to send the message to the StockQuoteService.

Invoke the client as follows.

ant stockquote -Daddurl=http://localhost:8280/

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