WSDL Ports
A WSDL port describes the interfaces (legal operations) exposed by a web service.
WSDL Ports
The <portType> element is the most important WSDL element.
It defines a web service, the operations that can be performed, and the messages that are involved.
The port defines the connection point to a web service. It can be compared to a function library (or a module, or a class)
in a traditional programming language. Each operation can be compared to a function in a traditional programming language.
Operation Types
The request-response type is the most common operation type, but WSDL defines four types:
| Type |
Definition |
| One-way |
The operation can receive a message but will not return a
response |
| Request-response |
The operation can receive a request and will return a
response |
| Solicit-response |
The operation can send a request and will wait for a
response |
| Notification |
The operation can send a message but will not wait for a
response |
One-Way Operation
A one-way operation example:
<message name="newTermValues">
<part name="term" type="xs:string"/>
<part name="value" type="xs:string"/>
</message>
<portType name="glossaryTerms">
<operation name="setTerm">
<input name="newTerm" message="newTermValues"/>
</operation>
</portType > |
In the example above, the port "glossaryTerms" defines a one-way operation called "setTerm".
The "setTerm" operation allows input of new glossary terms messages using a "newTermValues"
message with the input parameters "term" and "value". However, no output is
defined for the operation.
Request-Response Operation
A request-response operation example:
<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> |
In the example above, the port "glossaryTerms" defines a request-response operation called "getTerm".
The "getTerm" operation requires an input message called "getTermRequest"
with a parameter called "term", and will return an output message called "getTermResponse"
with a parameter called "value".
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