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Pages directly interact with stateful Java components on the server. Components and their state are managed by the Wicket framework, freeing the application developer from having to use HttpSession directly to manage state. Does not require XML for configuration. Compared to JSPs, enforces a clear separation of HTML markup and Java code.
A stateless protocol is a communication protocol in which the receiver must not retain session state from previous requests. The sender transfers relevant session state to the receiver in such a way that every request can be understood in isolation, that is without reference to session state from previous requests retained by the receiver.
HTTP is a stateless application-level protocol and it requires a reliable network transport connection to exchange data between client and server. [20] In HTTP implementations, TCP/IP connections are used using well-known ports (typically port 80 if the connection is unencrypted or port 443 if the connection is encrypted, see also List of TCP ...
For a typical web application, the application server sits behind the web servers. An application server framework is a service layer model. It includes software components available to a software developer through an application programming interface. An application server may have features such as clustering, fail-over, and load-balancing.
Stateless – A specific client does not consume server storage when the client is "at rest" Cache – Responses indicate their own cacheability; Uniform interface; Layered system – A client cannot ordinarily tell whether it is connected directly to the end server, or to an intermediary along the way
The use of home and remote interfaces and the ejb-jar.xml file were also no longer required in this release, having been replaced with a business interface and a bean that implements the interface. EJB 2.1, final release (2003-11-24) JSR 153 - Major changes: Web service support (new): stateless session beans can be invoked over SOAP/HTTP. Also ...
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This is the data that relates to the actual business process, run by the current service activity e.g. customer records, etc. on some occasions this type of data may need to be temporarily stored, especially if it acts as an input to the next stage within the service activity.