Build your first Web Services with Tuscany

"Creating Your First Web Service with Apache Tuscany video"
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.

Install the Latest Tuscany Eclipse Plugin

"Installing the Apache Tuscany Eclipse Plugins video"

A quick Step by Step walk through of downloading, installing, and verifying the Tuscany Eclipse Plugins.

This section shows you how to install the lastest Tuscany Eclipse plugin. The plugin gives you the ability to run an SCA composite file from the Package Explorer. You will see a "Run As Tuscany" menu item when you bring up the context menu on composite files.

Start Eclipse and go to Help -> Software Updates -> Find and Install. Select "Search for new features to install" and then click next

Create a new Remote Site. On the next dialog, click on "New Remote Site..." to create a new site entry. Give it a name such as
"Tuscany" and add the site URL from the latest Tuscany release (e.g http://www.apache.org/dist/tuscany/java/sca/1.5.1/tuscany-sca-1.5.1-updatesite/.

Select the "Remote Site" you just created, and click "Finish"

Select the "Apache Tuscany SCA Tools" and click "Next", and then, on the next dialog, click "Finish". Accept the "Plugin License" and next click on "Install All".

When asked to "restart eclipse", click the "yes" button.

Create your Service Business Logic

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   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.

 

 
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.
 

 
 
Hit the Finish button to complete the New Java Project dialog to create the "ws" java project. 
 

 
 

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 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.

 

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    and select the New Java Interface    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.

package helloworld;
import org.osoa.sca.annotations.Remotable;
@Remotable
public interface HelloWorld {
    String sayHello(String name);
}

Select the "helloworld" package again. Select the New Java Class button . 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.

package helloworld;
public class HelloWorldImpl implements HelloWorld {
	public String sayHello(String name) {
		return "Hello " + name;
	}
}

After completing these steps the content of the "ws" project will look as follows.

 

Compose Services

Now that you have all the required service implementations you compose them together to provide
the helloworld 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.

<?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"
    targetNamespace="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>

After completing these steps the content of the "ws" project will look as follows.

Congratulations you completed your 1st composite service applications, now its time to take it into
action.

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.

 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.

<?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>

You are finished. You have created the HelloWorld web service using Apache Tuscany.