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•Models
••SOAP
•WSDL
•UDDI
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•functionURIHTTP
API
•WWWalways-onUtility Computing
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•RPCORPC(DCOM, COBRA, and JAVA RMI)
••Interoperability
•Firewall Traversal
•Complexity
Interoperability
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Firewall Traversal
•COBRADCOM
•HTTP80
Complexity
•developer-friendly
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•HTTPCOM, RMI, COBRA
••API
•SOAPWSDLUDDIXML
•RESTfulAPISOAP
FacebookYahooIMDB
••Service Provider
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•Service Requestor•
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•Service Registry•
••Publish
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•Find•
•Bind•
SOAP: Simple Object Access Protocol
•SOAP•
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•Platform Independent
•Language Independent
•XML
•Extensible
•W3C
SOAP: Simple Object Access Protocol
• SOAP 1.0: Microsoft, Userland, DevelopMentor.• Specific to COM and HTTP.
• SOAP 1.1: include contributions from IBM and Lotus.• Substitutable transport binding (not just HTTP).
• Substitutable language binding (e.g. java).
• Substitutable data encoding (not only ANSI).
• Completely vendor-neutral (by W3C).
• Independent of: programming language, object model, operating system, or platform.
• SOAP 1.2: w3.org “XML Protocol” working group.
SOAP
•Request and Response Messages•remote object
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•SOAPenvelop•
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•namespace
SOAP
• <?xml version="1.0"?>
• <soap:Envelope
• xmlns:soap="http://www.w3.org/2001/12/soap-envelope"
• soap:encodingStyle="http://www.w3.org/2001/12/soap-encoding">
• <soap:Body xmlns:m="http://www.stock.org/stock">
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• </soap:Body>
• </soap:Envelope>
SOAP
<m:GetStockPrice>
<m:StockName>IBM</m:StockName>
</m:GetStockPrice>
Message
NamespaceSOAP Envelope
SOAP Envelope
Namespace
Message
SOAP
• <?xml version="1.0"?>
• <soap:Envelope
• xmlns:soap="http://www.w3.org/2001/12/soap-envelope"
• soap:encodingStyle="http://www.w3.org/2001/12/soap-encoding">
• <soap:Body xmlns:m="http://www.stock.org/stock">
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• </soap:Body>
• </soap:Envelope>
<m:GetStockPriceResponse>
<m:Price>34.5</m:Price>
</m:GetStockPriceResponse> Message
SOAP EnvelopeResult
returned in
Body
SOAP
••Unix RPC–
•COBRA–ORB
•RMI–java
•DCOM–Windows
•SOAP
•XML
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SOAP
•RPC (Remote Procedure Call)•
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•SOAP•XML
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WSDL: Web Service Description Language
•WSDL•XML
•XML
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•implementationservice interface
WSDL
•<portType>•
•<message>•
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•<types>•
•XML Schema
•<binding>•
WSDL
• <message name="getTermRequest">
• <part name="term" type="xs:string"/>
• </message>
• <message name="getTermResponse">
• <part name="value" type="xs:string"/>
• </message>
• <portType name="glossaryTerms">
• <operation name="getTerm">
• <input message="getTermRequest"/>
• <output message="getTermResponse"/>
• </operation>
• </portType>
<message name="getTermRequest">
<part name="term" type="xs:string"/>
</message>
<message name="getTermResponse">
<part name="value" type="xs:string"/>
</message>
<portType name="glossaryTerms">
<operation name="getTerm">
<input message="getTermRequest"/>
<output message="getTermResponse"/>
</operation>
</portType>
<binding type="glossaryTerms" name="b1">
<soap:binding style="document"
transport="http://schemas.xmlsoap.org/soap/http" />
<operation>
<soap:operation
soapAction="http://example.com/getTerm"/>
<input>
<soap:body use="literal"/>
</input>
<output>
<soap:body use="literal"/>
</output>
</operation>
</binding>
Binding to SOAP
UDDI: Universal Description, Discovery, and Integration
•UDDI•Directory Service
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•WSDL
•UDDISOAP
•UDDI•W3CXML, HTTP, DNS
•WSDL
UDDI
•Service Registry•
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•Service Provider•
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•Service Requestor•Service Broker
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UDDI
UDDI
•business
•business
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NodesUDDI
•Internal Enterprise ApplicationUDDI•
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•Firewall
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•PortalUDDI•
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NodesUDDI
•Partner CatalogUDDI•
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•E-MarketplaceUDDI•
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•RPCCOBRA
•e-Business•Security
•Transaction Management
•QOS
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