package ora.jwsnut.chapter3.echoservice;

import java.io.ByteArrayOutputStream;
import javax.xml.soap.SOAPMessage;
import ora.jwsnut.saaj.SAAJServlet;

/**
 * A servlet that recieves a SOAP messages and
 * returns it to its sender.
 */
public class EchoServlet extends SAAJServlet {
   
    /**
     * Output stream used to save a SOAP message
     * for logging.
     */
    private ByteArrayOutputStream os = new ByteArrayOutputStream();
    
    /**
     * Handles a received SOAP message by simply
     * returning it.
     */
    public SOAPMessage onMessage(SOAPMessage message) {
        
        // Convert the message to string representation
        // and log it.
        try {
            message.writeTo(os);
            log("Received SOAP message:\n" + os.toString());
            os.reset();
        } catch (Exception ex) {
            log("Exception", ex);
        }
        
        // Return the received message to the caller.
        return message;
    }
}