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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.
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.
Composability is a system design principle that deals with the inter-relationships of components. A highly composable system provides components that can be selected and assembled in various combinations to satisfy specific user requirements. In information systems, the essential features that make a component composable are that it be:
This makes a stateless session bean automatically thread-safe. Instance variables can be used during a single method call from a client to the bean, but the contents of those instance variables are not guaranteed to be preserved across different client method calls. Instances of Stateless Session beans are typically pooled.
These services inter-operate based on a formal definition (or contract, e.g., WSDL) that is independent of the underlying platform and programming language. The interface definition hides the implementation of the language-specific service. SOA-based systems can therefore function independently of development technologies and platforms (such as ...
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.
In Java Platform, Enterprise Edition (Java EE), the Conversational state are the field values of a session bean plus the transitive closure of the objects reachable from the bean's fields. The name "conversational" is used as this state is necessary for the same client to interact with the same bean instance throughout a session - as opposed to ...
Apache NiFi is a software project from the Apache Software Foundation designed to automate the flow of data between software systems.Leveraging the concept of extract, transform, load (ETL), it is based on the "NiagaraFiles" software previously developed by the US National Security Agency (NSA), which is also the source of a part of its present name – NiFi.