Build your first Web Services with Tuscany (TUSCANY) edited by Luciano Resende
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http://cwiki.apache.org/confluence/display/TUSCANY/Build+your+first+Web+Services+with+Tuscany
Changes:
http://cwiki.apache.org/confluence/pages/diffpagesbyversion.action?pageId=82971&originalVersion=1&revisedVersion=2
Content:
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h1. Build your first Web Services with Tuscany
This guide will give you step by step instructions on how to build your first
web services.
The first part, we will learn how we can add the Tuscany Runtime to Eclipse IDE.
The second part, will show how easy is to create a webservices using Apache
Tuscany.
{include:Tools - Install Tuscany Eclipse Plugins 1.1}
h2. Create your Service Business Logic
h2. Create a Java Project
In this step you create a Java Project in Eclipse to hold the composite service
application.
Click on the *{_}New Java Project{_}* button !new_java_project.png! in
the toolbar to launch the project creation dialog.
Next you enter "ws" as the *{_}Project name{_}*, and for *{_}Project Layout{_}*
select *{_}Create separate{_}*
*{_}folders for sources and class files._*
!new_java_project_dlg.png!
!project_layout.png!
Hit the *{_}Next{_}* button, and on the following page go to the
*{_}Libraries{_}* tab. Use the *{_}Add Library..._*
button on the right to add the *Tuscany Library* library to the project.
!new_java_project_lib.png!
Hit the *{_}Finish{_}* button to complete the *{_}New Java Project{_}* dialog
to create the "store" java project.
!new_java_project_folder.png!
h2. Construct Services
First you create the "helloworld" package folders into which later in this step
you place service implementations.
Select the "ws" project and click on the *{_}New Java Package{_}* button
!new_java_pkg_btn.png! in the toolbar to launch
the package creation dialog.
Next you enter "helloworld" as the package *{_}Name{_}*, and press the
*{_}Finish{_}* button to complete the
dialog.
!new_java_pkg_dlg.png!
h3. _HelloWorld_
In this step you create the HelloWorld service interface and implementation.
Select the "helloworld" package. Next you click on the dropdown arrow next to
the *{_}New Java Class{_}*
button !class_btn.png! and select the *{_}New Java
Interface{_}* !interface_btn.png! option from the dropdown
list. In the dialog
enter "HelloWorld" as the *{_}Name{_}* of the interface and select the Finish
button to complete the dialog.
The Java editor will open on the new created Java interface. Replace the
content of the editor by
*{_}copy-paste{_}* of the following Java interface code snippet.
{code}
package helloworld;
import org.osoa.sca.annotations.Remotable;
@Remotable
public interface HelloWorld {
String sayHello(String name);
}
{code}
Select the "helloworld" package again. Select the *{_}New Java Class{_}* button
!class_btn.png! . In the dialog enter
"HelloWorldImpl" as the *{_}Name{_}* of the class, add "Catalog" as the
interface this class implements, and
then select *{_}Finish{_}* to complete the dialog.
The Java editor will open on the new created Java class. Replace the content of
the editor by
*{_}copy-paste{_}* of the following Java class code snippet.
{code}
package helloworld;
public class HelloWorldImpl implements HelloWorld {
public String sayHello(String name) {
return "Hello " + name;
}
}
{code}
After completing these steps the content of the "ws" project will look as
follows.
!store_project.png!
*Note:* CatalogImpl is red x'ed because it makes use of the CurrencyConverter
interface that we
have not implemented yet.
h2. Compose Services
Now that you have all the required service implementations you compose them
together to provide
the store composite service. The composition is stored in a .composite file.
Select the "src" folder of the "ws" project. *{_}Right click{_}* to get the
context menu, select *{_}New{_}*, and
then *{_}File{_}*. In the *{_}New File{_}* dialog enter "helloworld.composite"
for the *{_}File name{_}*, and then select *{_}Finish{_}*
to complete the dialog.
The Text editor will open on the new created composite file. Replace the
content of the editor by
*{_}copy-paste{_}* of the following composite snippet.
{code}
<?xml version="1.0" encoding="UTF-8"?>
<composite xmlns="http://www.osoa.org/xmlns/sca/1.0";
xmlns:t="http://tuscany.apache.org/xmlns/sca/1.0";
xmlns:c="http://helloworld";
name="helloworld">
<component name="HelloWorldComponent">
<implementation.java class="helloworld.HelloWorldImpl"/>
<service name="HelloWorld">
<binding.ws uri="http://localhost:8080/HelloWorld"/>
</service>
</component>
</composite>
{code}
After completing these steps the content of the "store" project will look as
follows.
!store_project_4.jpg!
Congratulations you completed your 1st composite service applications, now its
time to take it into
action.
h2. Use Services
In this step you launch and use the ws composite service application you
created.
First select the "helloworld.composite" file, in your "ws" project. *{_}Right
click{_}* to get the
context menu, select *{_}Run As{_}*, and then *{_}Tuscany{_}*. The Tuscany
runtime will start up adding
the helloworld composition to its domain and will make the helloworld web
service live.
The Eclipse console will show the following messages.
!eclipse_console.png!
Next Launch your Web browser and enter the following address:
[http://localhost:8080/HelloWorld?wsdl]
You should now have your web service live, and the url should give you back a
generated wsdl for the service.
{code}
<?xml version="1.0" encoding="UTF-8"?>
<wsdl:definitions targetNamespace="http://helloworld";
xmlns:soap12="http://schemas.xmlsoap.org/wsdl/soap12/";
xmlns:ns0="http://helloworld";
xmlns:mime="http://schemas.xmlsoap.org/wsdl/mime/";
xmlns:http="http://schemas.xmlsoap.org/wsdl/http/";
xmlns:ns1="http://org.apache.axis2/xsd";
xmlns:wsaw="http://www.w3.org/2006/05/addressing/wsdl";
xmlns:xs="http://www.w3.org/2001/XMLSchema";
xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/";
xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/";>
<wsdl:types>
<xs:schema attributeFormDefault="qualified" elementFormDefault="qualified"
targetNamespace="http://helloworld"; xmlns:ns="http://helloworld";>
<xs:element name="sayHello">
<xs:complexType>
<xs:sequence>
<xs:element minOccurs="0" name="param0" nillable="true"
type="xs:string"/>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="sayHelloResponse">
<xs:complexType>
<xs:sequence>
<xs:element minOccurs="0" name="return" nillable="true"
type="xs:string"/>
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:schema>
</wsdl:types>
<wsdl:message name="sayHelloRequest">
<wsdl:part name="parameters" element="ns0:sayHello">
</wsdl:part>
</wsdl:message>
<wsdl:message name="sayHelloResponse">
<wsdl:part name="parameters" element="ns0:sayHelloResponse">
</wsdl:part>
</wsdl:message>
<wsdl:portType name="HelloWorldPortType">
<wsdl:operation name="sayHello">
<wsdl:input message="ns0:sayHelloRequest" wsaw:Action="urn:sayHello">
</wsdl:input>
<wsdl:output message="ns0:sayHelloResponse"
wsaw:Action="urn:sayHelloResponse">
</wsdl:output>
</wsdl:operation>
</wsdl:portType>
<wsdl:binding name="HelloWorldHttpBinding" type="ns0:HelloWorldPortType">
<http:binding verb="POST"/>
<wsdl:operation name="sayHello">
<http:operation location="HelloWorld/sayHello"/>
<wsdl:input>
<mime:content part="sayHello" type="text/xml"/>
</wsdl:input>
<wsdl:output>
<mime:content part="sayHello" type="text/xml"/>
</wsdl:output>
</wsdl:operation>
</wsdl:binding>
<wsdl:binding name="HelloWorldSOAP11Binding" type="ns0:HelloWorldPortType">
<soap:binding style="document"
transport="http://schemas.xmlsoap.org/soap/http"/>
<wsdl:operation name="sayHello">
<soap:operation soapAction="urn:sayHello" style="document"/>
<wsdl:input>
<soap:body use="literal"/>
</wsdl:input>
<wsdl:output>
<soap:body use="literal"/>
</wsdl:output>
</wsdl:operation>
</wsdl:binding>
<wsdl:service name="HelloWorld">
<wsdl:port name="HelloWorldSOAP11port_http"
binding="ns0:HelloWorldSOAP11Binding">
<soap:address location="http://192.168.209.1:8080/HelloWorld"/>
</wsdl:port>
<wsdl:port name="HelloWorldHttpport" binding="ns0:HelloWorldHttpBinding">
<http:address location="http://192.168.209.1:8080/HelloWorld"/>
</wsdl:port>
</wsdl:service>
</wsdl:definitions>
{code}
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