Question

Internet Programming. For event-driven architecture, how does polling work?

Answer 1

Answer:-

Event-driven Architecture :

The service-oriented architecture (SOA), combining the intelligence and proactiveness of event-driven architecture with the organizational capabilities found in service offerings.

Before event-driven SOA, the typical SOA platform orchestrated services centrally, through pre-defined business processes, assuming that what should have already been triggered is defined in a business process.

This older approach does not account for events that occur across, or outside of, specific business processes.

Prototypical Service-oriented Architecture :

The prototypical service-oriented architecture paradigm contains four essential elements:

1) multiple low-level system events that, separately do not appear to have any relationship but through pattern detection by comparing these many events some unusual or less obvious correlation becomes clear.

2) some amount of data enrichment by infusion of related information to each event to more clearly illustrate how the many events are related.

3) a trigger condition which when not met, the business-level event is not created, but when the trigger condition is met, the higher-level business event is created.

4) some human or automated process that is invoked when the trigger event is reached.

Multiple low-level system events:

1) The human intelligence processes and gathers these relationships faster than current artificial computational capability

2) The  engine uses preponderant causal vector rate-of-change propagation to code the relationship among the events and establishes a partial order in which it validates the causality perceived between multiple occurrences.

3) Multiple low-level system events are processed by the Causal Vector Engine and compared against these rules to trigger higher-level Business Events

4) a Service Component Architecture (SCA). Like any SCA component, the program accesses a mediation flow through exports that it provides, and the mediation flow forwards messages to other external services via imports.

5) Once the developers have coded the custom binding for both export and import, they can start to focus on the mediation flow component.

6) In the WebSphere Integration Developer assembly editor, this is done by the JMS Custom Binding Mediation Component where each operation on the flow component's interface is represented by a request and a response .

7) Service Data Objects (SDO) framework provides a unified framework for data application development. With SDO, developers do not need to be familiar with any specific API in order to access and utilize data.

Business-level trigger condition :

A business-level trigger condition enables the service-oriented architecture, architecture to establish real-time customer intelligence, marketing automation and customer loyalty solutions, among other features.