Moving 2.x contribs

git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@835178 13f79535-47bb-0310-9956-ffa450edef68

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+DataBinding Echo Sample
+=======================
+
+This sample demonstrates how databindings are used to convert data formats as 
+the data flows between components. 
+
+The README in the samples directory (the directory above this) provides 
+general instructions about building and running samples. Take a look there 
+first. 
+
+If you just want to run it to see what happens, open a command prompt, navigate
+to this sample directory, and do
+
+ant run 
+
+OR if you don't have ant, on Windows do
+
+java -cp ..\..\lib\tuscany-sca-manifest.jar;..\binding-echo-extension\target\sample-binding-echo-extension.jar;target\sample-databinding-echo.jar dbecho.EchoDataBindingClient
+
+and on *nix do
+
+java -cp ../../lib/tuscany-sca-manifest.jar:../binding-echo-extension/target/sample-binding-echo-extension.jar:target/sample-databinding-echo.jar dbecho.EchoDataBindingClient
+
+
+Sample Overview
+---------------
+If reference and service interfaces are the same in all but the formats of 
+data being passed to and returned from the operations of the interfaces,
+then SCA will try to apply appropriate transformations to the data formats
+to allow messages to pass. 
+
+This sample shows this happening. ComponentA implements Interface1 which
+defines;
+
+ String call(String msg)
+ String call1(String msg) 
+ 
+ComponentA defines a reference to ComponentB with Interface1. ComponentB 
+however implements Interface2 which defines;
+
+ Node call(Node msg);
+ XMLStreamReader call1(XMLStreamReader msg);
+ 
+You can see from the test output below that SCA converts the call() msg from a 
+String to a DOM object (org.apache.xerces.dom.DeferredDocumentImpl). It
+converts the call1() msg from a String to a XML stream reader 
+(com.ctc.wstx.sr.ValidatingStreamReader).
+
+databinding-echo/
+  src/
+    main/
+      java/
+        dbecho/
+          ComponentAImpl.java                           - component implementation 
+          ComponentBImpl.java                           - component implementation
+          Echo.java                                     - service interface with data binding
+          EchoDataBindingClient.java                    - sample client code
+          Interface1.java                               - service interface with data binding
+          Interface2.java                               - service interface with data bindings
+      resources/
+        META-INF/
+          services/
+            org.apache.tuscany.sca.core.ModuleActivator - specifies the module activation class to call
+        EchoDataBinding.composite                       - composite definition
+        wsdl/
+          echo.wsdl                                     - WSDL deinitions
+    test/
+      java/ 
+        dbecho/
+          EchoDataBindingTestCase.java - junit test case
+  databinding-echo.png - pictorial representation of the sample .composite file
+  build.xml            - the Ant build file
+  pom.xml              - the Maven build file
+  
+TODO - Needs more description of what else is going on in this test
+       properties, wsdl?
+
+  
+Building And Running The Sample Using Ant
+-----------------------------------------
+With the binary distribution the sample can be built and run using Ant as 
+follows.
+
+cd databinding-echo
+ant compile
+ant run
+
+You should see the following output from the run target.
+
+run:
+     [java] [Property] prefix: ABC
+     [java] [Property] prefix1: ABC
+     [java] [Property] bar: BAR
+     [java] ComponentA --> Received message: <message><foo>123</foo></message> [java.lang.String]
+     [java] ComponentB --> Received message: [#document: null] [org.apache.xerces.dom.DeferredDocumentImpl]
+     [java] ComponentB --> Returned message: [#document: null] [org.apache.xerces.dom.DeferredDocumentImpl]
+     [java] ComponentA --> Returned message: <?xml version="1.0" encoding="UTF-8"?><message><foo>123</foo></message> [java.lang.String]
+     [java] [Property] prefix: ABC
+     [java] [Property] prefix1: ABC
+     [java] [Property] bar: BAR
+     [java] ComponentA --> Received message: <message><foo>123</foo></message> [java.lang.String]
+     [java] ComponentB --> Received message: com.ctc.wstx.sr.ValidatingStreamReader@4c444c44 [com.ctc.wstx.sr.ValidatingStreamReader]
+     [java] ComponentB --> Returned message: com.ctc.wstx.sr.ValidatingStreamReader@4c444c44 [com.ctc.wstx.sr.ValidatingStreamReader]
+     [java] ComponentA --> Returned message: <?xml version='1.0' encoding='UTF-8'?><message><foo>123</foo></message> [java.lang.String]
+     [java] call  response = <?xml version="1.0" encoding="UTF-8"?><message><foo>123</foo></message>
+     [java] call1 response = <?xml version='1.0' encoding='UTF-8'?><message><foo>123</foo></message>
+
+
+Building And Running The Sample Using Maven 
+-------------------------------------------
+With either the binary or source distributions the sample can be built and run 
+using Maven as follows. 
+
+cd databinding-echo
+mvn
+
+You should see the following output from the test phase.
+
+-------------------------------------------------------
+ T E S T S
+-------------------------------------------------------
+Running dbecho.EchoDataBindingTestCase
+[Property] prefix: ABC
+[Property] prefix1: ABC
+[Property] bar: BAR
+ComponentA --> Received message: <message><foo>123</foo></message> [java.lang.String]
+ComponentB --> Received message: [#document: null] [org.apache.xerces.dom.DeferredDocumentImpl]
+ComponentB --> Returned message: [#document: null] [org.apache.xerces.dom.DeferredDocumentImpl]
+ComponentA --> Returned message: <?xml version="1.0" encoding="UTF-8"?><message><foo>123</foo></message> [java.lang.String]
+[Property] prefix: ABC
+[Property] prefix1: ABC
+[Property] bar: BAR
+ComponentA --> Received message: <message><foo>123</foo></message> [java.lang.String]
+ComponentB --> Received message: com.ctc.wstx.sr.ValidatingStreamReader@74e274e2 [com.ctc.wstx.sr.ValidatingStreamReader]
+ComponentB --> Returned message: com.ctc.wstx.sr.ValidatingStreamReader@74e274e2 [com.ctc.wstx.sr.ValidatingStreamReader]
+ComponentA --> Returned message: <?xml version='1.0' encoding='UTF-8'?><message><foo>123</foo></message> [java.lang.String]
+Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 1.653 sec
+
+Results :
+
+Tests run: 1, Failures: 0, Errors: 0, Skipped: 0
+
+This shows that the Junit test cases have run successfully.