Understanding Web Services and Java Connector Architecture Functionality
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BEA Systems, Inc.
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Adherence to SAP ABAP serialization rules and SAP Interface Repository standards
published by SAP AG.
Understanding Web Services and Java Connector Architecture
Functionality
The following section describes how the BEA WebLogic Adapter for SAP can incorporate
Web services and Java Connector Architecture technology.
Web Services
Web services allow SAP calls to be made across the Internet or an intranet, using specialized
versions of the XML language that allow a developer to specify the parameters,
connections methods, and remote calls and store them for reference in a repository. At
runtime, a person, an interface, or another function, can read this repository and
automatically invoke the service. Web services currently do not have industry standards for
transactional behavior. Web services are useful when your function calls must be made
across firewall boundaries. Using Web services, you can use functions provided by external
providers, as long as you know the function interface.
Web Services Example
A Web service exposes the “cup” interface, which provides a teacup. The Acme Company
exposes the “tea” Web service, which provides a brown liquid when the correct parameter
“money” is provided. A cup of tea can be received by invoking the “tea” Web service and
passing the “money” parameter. Additional components are not required to receieve tea
via the “tea” Web service.
Java Connector Architecture
Java Connector Architecture (JCA) provides a reusable component model to build and
deploy multi-tier applications that are platform and vendor-independent. JCA acts as a
type of envelope or “container” that will allow the adapter to run inside the BEA WebLogic
Server and connect to SAP and immediately return the results. JCA is useful when your SAP
system resides within a local intranet or is accesed directly. JCA implements JAVA
Connection and Transaction models. JCA requires a resource adapter to be physically
deployed on the host application server to access the remote EIS system.
Using combinations of JCA and Web services is possible. For example, a JCA application can
be invoked via a Web service or a Web service may be implemented inside a JCA container.
The standards and protocols are still evolving.
Содержание WebLogic Server
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Страница 222: ...Extensible CCI Control A 30 BEA Systems Inc You can add your own methods that call the adapter s services ...
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