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SCA for PHP can generate WSDL from the annotations within a service component, so that it can be easily deployed and exposed as a Web service. To provide SCA with the information it needs to generate the WSDL, it is necessary to add the annotation @binding.soap under the @service annotation and to specify the parameters and return values of the methods using the @param and @return annotations. These annotations will be read when WSDL is generated, and the order and types of the parameters determine the contents of the <schema> section of the WSDL.
SCA for PHP always generates document/literal wrapped WSDL for components that are exposing a Web service. Note that this does not stop components from consuming Web services which are not SCA components and which are documented with WSDL written in a different style.
The scalar types which can be used in the @param annotation are the four common PHP scalar types: boolean, integer, float and string. These are simply mapped to the XML schema types of the same name in the WSDL. The example below, which is a trivial implementation of the StockQuote service that the ConvertedStockQuote component calls, illustrates string and float types.
Beispiel #1 StockQuote Service
<?php
include "SCA/SCA.php";
/**
* Scaffold implementation for a remote StockQuote Web service.
*
* @service
* @binding.soap
*
*/
class StockQuote {
/**
* Get a stock quote for a given ticker symbol.
*
* @param string $ticker The ticker symbol.
* @return float The stock quote.
*/
function getQuote($ticker) {
return 80.9;
}
}
?>
WSDL much like the following (though with a service location other than 'localhost', probably) would be generated from this service:
Beispiel #2 Generated WSDL
<?xml version="1.0" encoding="UTF-8"?>
<definitions xmlns="http://schemas.xmlsoap.org/wsdl/" xsi:type="tDefinitions"
xmlns:tns2="http://StockQuote" xmlns:tns="http://schemas.xmlsoap.org/wsdl/"
xmlns:tns3="http://schemas.xmlsoap.org/wsdl/soap/"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" targetNamespace="http://StockQuote">
<types>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
targetNamespace="http://StockQuote">
<xs:element name="getQuote">
<xs:complexType>
<xs:sequence>
<xs:element name="ticker" type="xs:string"/>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="getQuoteResponse">
<xs:complexType>
<xs:sequence>
<xs:element name="getQuoteReturn" type="xs:float"/>
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:schema>
</types>
<message name="getQuoteRequest">
<part name="getQuoteRequest" element="tns2:getQuote"/>
</message>
<message name="getQuoteResponse">
<part name="return" element="tns2:getQuoteResponse"/>
</message>
<portType name="StockQuotePortType">
<operation name="getQuote">
<input message="tns2:getQuoteRequest"/>
<output message="tns2:getQuoteResponse"/>
</operation>
</portType>
<binding name="StockQuoteBinding" type="tns2:StockQuotePortType">
<operation name="getQuote">
<input>
<tns3:body xsi:type="tBody" use="literal"/>
</input>
<output>
<tns3:body xsi:type="tBody" use="literal"/>
</output>
<tns3:operation xsi:type="tOperation" soapAction=""/>
</operation>
<tns3:binding xsi:type="tBinding" transport="http://schemas.xmlsoap.org/soap/http" style="document"/>
</binding>
<service name="StockQuoteService">
<port name="StockQuotePort" binding="tns2:StockQuoteBinding">
<tns3:address xsi:type="tAddress" location="http://localhost/StockQuote/StockQuote.php"/>
</port>
</service>
</definitions>
<!-- this line identifies this file as WSDL generated by SCA for PHP. Do not remove -->
In order for SCA to find the service class, the script filename must match the service class name. In this case, StockQuote.php
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