Specializations - Often connectors in an implicit invocation system include the traditional procedure call in addition to the bindings between event announcements and procedure calls.
Integrated Development Environments (IDEs) - Think of the debugging process (use of breakpoints)
- How editors behaves on a breakpoint?
- How variables monitors behave on a breakpoint?
- How these components know when these are required?
Examples - Used in programming environments to integrate tools:
- Debugger stops at a breakpoint and makes that announcement.
- Editor responds to the announcement by scrolling to the appropriate source line of the program and highlighting that line.
Examples - Used to enforce integrity constraints in database management systems (called triggers).
- Used in user interfaces to separate the presentation of data from the applications that manage that data.
Non-buffered Event-Based Implicit Invocations - The nonbuffered event-based implicit invocation architecture breaks the software system into two partitions:
- Event sources and
- Event listeners.
- The event registration process connects these two partitions. There is no buffer available between these two parties.
Non-buffered Event-Based Implicit Invocations - In the event-based implicit invocations (nonbuffered) each object keeps its own dependency list.
- Any state changes of the object will impact its dependents.
- the basic concept of event-based implicit invocation, which is the opposite of the direct explicit method invocation whereby the invoker must wait for the response from the called module; in this case, the invoker does not proceed until the called party responds.
Applicable domains of nonbuffered event-driven architecture: - Interactive GUI component communication and integrated development environment (IDE) tools
- Applications that require loose coupling between components that need to notify or trigger other components to take actions upon asynchronous notifications
- When event handlings in the application are not predictable
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