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Liferay Portal 5.2 Systems Development by Jonas Yuan

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Constructing web services

In general, web services are resources which may be called over the HTTP protocol to return data. They are platform-independent, allowing communication between applications on different operating systems and application servers. When the database entries are generated by ServiceBuilder, web services can be generated as well based on Apache Axis. As a result, nearly all of the backend API calls can be made using web services. Java clients may be generated from Web Service Definition Language (WSDL) using any number of tools (Axis, Xfire-CXF, JAX-RPC, and so on). Apache Axis is essentially a Simple Object Access Protocol (SOAP) engine—a framework for constructing SOAP processors such as clients, servers, gateways, and so ...

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