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Develop message-based solutions
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Develop message-based solutions

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Questions and Answers

What is a key consideration when deciding between event-driven and message-driven approaches?

  • Understanding the differences in service communication (correct)
  • Minimizing points of failure
  • Focusing on the network size
  • Prioritizing software system complexity

    • In a message-driven approach, what is an example scenario involving back-and-forth communications?

  • A gaming console connecting to an online multiplayer game
  • An airline customer buying a ticket through a web browser (correct)
  • A user browsing an e-commerce website
  • A social media platform sending push notifications

    • What is a characteristic of modern software systems that influences the choice between message-driven and event-driven approaches?

  • Distributed nature and network connectivity (correct)
  • Operating system compatibility
  • User interface design
  • Backend database structure

    • Why is it important to understand both message-driven and event-driven approaches in today's world of distributed computing?

    <p>Software teams may need to tackle both methods of application communication</p> Signup and view all the answers

    What is the well-known location used by components to publish events in Event Driven systems?

    <p>Ordered queue</p> Signup and view all the answers

    In Event Driven systems, how do components share data with consumers?

    <p>With a fixed sender and shared with any consumer</p> Signup and view all the answers

    What type of message is sent to produce a change on the state in a CQRS/ES application?

    <p>Command</p> Signup and view all the answers

    What does an Event message include in a CQRS/ES application?

    <p>Necessary data to evolve the older state to the newer state</p> Signup and view all the answers

    How do components announce the location where they expose their events in Event Driven systems?

    <p>By using a well-known location</p> Signup and view all the answers

    What is the main difference between 'Message Driven' and 'Event Driven' systems?

    <p>'Message Driven' refers to a building block, 'Event Driven' refers to a higher level property</p> Signup and view all the answers

    What type of message is sent to a component to obtain some information from it in a CQRS/ES application?

    <p>Query</p> Signup and view all the answers

    What is the response to a Query message in a CQRS/ES application?

    <p>Reply</p> Signup and view all the answers

    What did Alan Kay emphasize as a crucial part of his definition of object-oriented programming?

    <p>Messaging</p> Signup and view all the answers

    What should a message in an API call include?

    <p>Recipient's identity, code to be executed, arguments, returned value</p> Signup and view all the answers

    What are complex interactions between services and application components referred to as?

    <p>Events</p> Signup and view all the answers

    How do event-driven systems register events?

    <p>Adding notes to a messaging queue or bus</p> Signup and view all the answers

    What does an event-driven user interface lack?

    <p>Formal flow control</p> Signup and view all the answers

    What type of system is an event-driven architecture?

    <p>Asynchronous and non-blocking</p> Signup and view all the answers

    In a service-oriented front-end architecture (SOFEA), where are web pages defined?

    <p>HTML and CSS</p> Signup and view all the answers

    Why are message-driven systems familiar to most programmers?

    <p>Similarity to classic programming models</p> Signup and view all the answers

    What does it mean when message-driven systems 'block'?

    <p>Individual calls and responses wait for processing by the recipient</p> Signup and view all the answers

    What do event-driven systems allow for in managing and executing large amounts of transactions?

    <p>Flexibility and speed</p> Signup and view all the answers

    What are observability tools emerging to aid in debugging?

    <p>Complex event chains</p> Signup and view all the answers

    What does the choice between message-driven and event-driven approaches depend on?

    <p>Complexity of interactions between systems and need for regular status updates</p> Signup and view all the answers

    What type of systems support publish/subscribe, synchronous or asynchronous communication, and transactions?

    <p>Message-driven systems</p> Signup and view all the answers

    Which infrastructure allows communication and data exchange between applications via self-contained units of information (messages)?

    <p>Message-Oriented Middleware (MOM)</p> Signup and view all the answers

    Which protocol is designed for wireless sensor networks, M2M, and the internet of things, catering to constrained devices and applications?

    <p>MQTT</p> Signup and view all the answers

    What type of systems involve emitting data from a component for consumption?

    <p>Event-driven systems</p> Signup and view all the answers

    Which type of systems rely on asynchronous message-passing for loose coupling, isolation, and location transparency?

    <p>Reactive Systems</p> Signup and view all the answers

    What type of systems have components with unique addresses and await messages?

    <p>Message-driven systems</p> Signup and view all the answers

    Which system provides asynchronous communication, utilizing message queues for temporary storage and asynchronous message passing?

    <p>Message-Oriented Middleware (MOM)</p> Signup and view all the answers

    Which approach involves intercepting user actions in a system's user interface?

    <p>Event-driven model</p> Signup and view all the answers

    What is the distinction between message-driven and event-driven environments relevant in the context of?

    <p>SOA, middleware, and application and enterprise integration</p> Signup and view all the answers

    Which system allows components to have queues for storing incoming messages in case of load spikes?

    <p>Message-driven systems</p> Signup and view all the answers

    What is a fundamental feature for space decoupling in systems?

    <p>Message passing</p> Signup and view all the answers

    Which system acts as middleware for different applications in a distributed environment, making programming easier and providing transparency for applications?

    <p>Message-Oriented Middleware (MOM)</p> Signup and view all the answers

    Study Notes

    Message-Driven vs Event-Driven Approaches to Application Integration

    • Most large organizations will have a hybrid strategy, using both message-driven and event-driven approaches for customer-facing/API calls and enterprise operations.
    • The distinction between message-driven and event-driven environments is relevant in the context of SOA, middleware, and application and enterprise integration.
    • A user interface typically resembles an event-driven model, where the system intercepts user actions.
    • Message-driven systems support publish/subscribe, synchronous or asynchronous communication, and transactions, while event-driven systems involve emitting data from a component for consumption.
    • Message-Oriented Middleware (MOM) is an infrastructure allowing communication and data exchange between applications via self-contained units of information (messages).
    • MOM provides asynchronous communication, utilizing message queues for temporary storage and asynchronous message passing.
    • MOM acts as middleware for different applications in a distributed environment, making programming easier and providing transparency for applications.
    • MQTT is a message-oriented protocol designed for wireless sensor networks, M2M, and the internet of things, catering to constrained devices and applications.
    • Reactive Systems rely on asynchronous message-passing for loose coupling, isolation, and location transparency, enabling load management and flow control.
    • In message-driven systems, components have unique addresses and await messages, while in event-driven systems, data is emitted from a component for consumption by others.
    • Message passing in a message-driven system allows components to have queues for storing incoming messages in case of load spikes.
    • Message passing is a fundamental feature for space decoupling in systems.

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    Description

    Test your knowledge of message-driven and event-driven approaches to application integration with this quiz. Explore the distinctions, uses, and benefits of both systems, including message-oriented middleware, MQTT protocol, and the role of asynchronous communication in reactive systems.

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