Added echo sample

echo/client/saaj/build.gradle

@@ -0,0 +1,4 @@
+task runClient(dependsOn: 'classes', type:JavaExec) {
+	main = "org.springframework.ws.samples.echo.client.saaj.EchoClient"
+	classpath = sourceSets.main.runtimeClasspath
+}

echo/client/saaj/src/main/java/org/springframework/ws/samples/echo/client/saaj/EchoClient.java

@@ -0,0 +1,103 @@
+/*
+ * Copyright 2006 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.ws.samples.echo.client.saaj;
+
+import java.io.IOException;
+import java.net.MalformedURLException;
+import java.net.URL;
+
+import javax.xml.soap.MessageFactory;
+import javax.xml.soap.Name;
+import javax.xml.soap.SOAPBodyElement;
+import javax.xml.soap.SOAPConnection;
+import javax.xml.soap.SOAPConnectionFactory;
+import javax.xml.soap.SOAPEnvelope;
+import javax.xml.soap.SOAPException;
+import javax.xml.soap.SOAPFault;
+import javax.xml.soap.SOAPMessage;
+import javax.xml.transform.TransformerException;
+import javax.xml.transform.TransformerFactory;
+
+/**
+ * A client for the Echo Web Service that uses SAAJ.
+ *
+ * @author Ben Ethridge
+ * @author Arjen Poutsma
+ */
+public class EchoClient {
+
+    public static final String NAMESPACE_URI = "http://www.springframework.org/spring-ws/samples/echo";
+
+    public static final String PREFIX = "tns";
+
+    private SOAPConnectionFactory connectionFactory;
+
+    private MessageFactory messageFactory;
+
+    private URL url;
+
+    public EchoClient(String url) throws SOAPException, MalformedURLException {
+        connectionFactory = SOAPConnectionFactory.newInstance();
+        messageFactory = MessageFactory.newInstance();
+        this.url = new URL(url);
+    }
+
+    private SOAPMessage createEchoRequest() throws SOAPException {
+        SOAPMessage message = messageFactory.createMessage();
+        SOAPEnvelope envelope = message.getSOAPPart().getEnvelope();
+        Name echoRequestName = envelope.createName("echoRequest", PREFIX, NAMESPACE_URI);
+        SOAPBodyElement echoRequestElement = message.getSOAPBody()
+                .addBodyElement(echoRequestName);
+        echoRequestElement.setValue("Hello");
+        return message;
+    }
+
+    public void callWebService() throws SOAPException, IOException {
+        SOAPMessage request = createEchoRequest();
+        SOAPConnection connection = connectionFactory.createConnection();
+        SOAPMessage response = connection.call(request, url);
+        if (!response.getSOAPBody().hasFault()) {
+            writeEchoResponse(response);
+        }
+        else {
+            SOAPFault fault = response.getSOAPBody().getFault();
+            System.err.println("Received SOAP Fault");
+            System.err.println("SOAP Fault Code :" + fault.getFaultCode());
+            System.err.println("SOAP Fault String :" + fault.getFaultString());
+        }
+    }
+
+    private void writeEchoResponse(SOAPMessage message) throws SOAPException {
+        SOAPEnvelope envelope = message.getSOAPPart().getEnvelope();
+        Name echoResponseName = envelope.createName("echoResponse", PREFIX, NAMESPACE_URI);
+        SOAPBodyElement echoResponseElement = (SOAPBodyElement) message
+                .getSOAPBody().getChildElements(echoResponseName).next();
+        String echoValue = echoResponseElement.getTextContent();
+        System.out.println();
+        System.out.println("Echo Response [" + echoValue + "]");
+        System.out.println();
+    }
+
+    public static void main(String[] args) throws Exception {
+        String url = "http://localhost:8080/echo-server/services";
+        if (args.length > 0) {
+            url = args[0];
+        }
+        EchoClient echoClient = new EchoClient(url);
+        echoClient.callWebService();
+    }
+}