Module CSC7321—CSN: Middleware and software architecture for Internet distributed applications

Objectives of the teaching unit

After this teaching unit, you should be able to:

1. Identify and use the main interaction patterns between distributed components (synchronous requests and publish/subscribe)
2. Learn master technologies for producing enterprise distributed applications (RestFul WebServices, JavaEE, Rabbit-MQ).
3. Design and implement a distributed application made of several functional modules with computing components, persistent components, client components. The application will be realised in the context of a microproject lasting during all the teaching unit.
4. Identify design patterns and architectural patterns used by middleware for disributed applications.
5. Define the quality of a distributed architecture and discuss architecture choices to respond to quality of software architecture requirements (e.g. interoperability, security, scalability).

Sequencing

• Subject
  Material
  Key notions
• Software Installation
  TODO before
  TODO before the first lab
  • Required software
• Monday, 09/13
  Introduction
  Introduction
  • Presentation of the teaching unit
  • Who are you ? Could you answer the questions in this shared file.
  • Presentation of the workshop
    • Discover the list of Articles
  • Middleware definitions and overview
  • Discover the Micro-Project subject
  • Middleware, interaction styles, application servers service oriented architecture, component-based architecture
• Home Work
  TODO
  TODO
  • Who are you ? If you have not finished already, fill in the who are you form
  • Choose your favorite articles from the list Articles
  • Read carefully the subject of the micro-project (see above), and write down your questions for the next class.
  • Be aware of the prerequisites and do the necessary home work to be operational, with java tutorial, and relational database tutorial.
  • Discover some of the tools that will be used during the labs
    • Discover maven (it will be used during labs and microproject)
      • Read "Maven by example" Chapter "Customizing a Maven Project"
      • Make the tutorial "Maven Getting Started Guide"
      • Read "Maven by example" Chapter "A Simple Web Application"
      • Read "Maven by example" Chapter "A Multi-module Project"
• Tuesday 09/14
  Component middleware (1/3)
  Component middleware (1/3)
  • Component Middleware
  • EJB Lab 1 —  Stateless and Stateful Beans
  • Explanations on code samples
  • Introduction to distributed design patterns
  • Notion of interface, component, container, application server
  • Functional vs extra-functional services
  • Enterprise JAVA Beans, RMI-IIOP, JAVA Naming and directory interface, Persistence
  • Stateless/Stateful Session bean, Annotations, Asynchronous Method Invocation (Future)
• Wednesday 09/15
  Component middleware (2/3)
  Component middleware (2/3)
  • EJB Lab 2 — Entity Bean
  • Entity bean, Multiplicities (one-to-one, one-to-many, many-to-one, many-to-many)
  • Persistence management mode, persistence context
• Wednesday 09/15
  Component middleware (3/3)
  Component middleware (3/3)
  • Start microproject - EJB part
  • Develop an application integrating session and entity beans
  • Incremental design with unit tests
• Home Work
  TODO
  TODO
  • Finish and return Lab
  • Introduction to software architecture : study the slides
  • Software architecture, views,
  • attribute-driven design, quality attributes,
  • tactics, architectural patterns
    
    
• Tuesday 09/21
  REST
  REST, Web Services
  • Middleware for synchronous requests (slides)
  • Download the examples
  • Install a REST Client
  • Download postman collection
  • RESTful WebServices in Java (slides)
  • Understand the skier example.
  • Architectural style, WWW, RESTful, REST resource
  • CRUD (HTTP): Create (POST), Read (GET), Update (PUT), Delete (DELETE)
  • JAXB, Format (plain text, html, xml, json [JavaScript Object Notation], image, video),
  • JAXB (JAVA Architecture for XML Binding), serialisation, Un/Marshalling, Annotations,
  • JAX-RS, RESTful WebServices, Annotations.
• Home Work
  TODO
  TODO
  • Discover the article you have to present
  • Understand the REST examples code and come with questions
• Wednesday 09/22 am and pm
  REST - lab
  REST lab
  Several steps are proposed for the REST lab :

  • Getting started with the microproject
  • Write a client for the emulated visit REST server
  • Write a client and a server for the Vlib bike stations OpenData (optional functionality; to be included in the project if you have time)
• Home Work
  TODO
  TODO
  • Finish and return REST Lab before the first DEBS lecture
• Tuesday 09/28
  Broadcast
  Micro project work
  • Finish drawing the path of one user on the map, with interactions with the emulation server.
  • Finish the tour management module (if necessary)
• Wednesday 09/29
  DEBS (1/4)
  Distributed Event-Based Systems (1/4)
  • DEBS — Basics (slides 1/3)
  • DEBS with topic-based filtering — Start Lab to discover RabbitMQ
  • Event-based (a.k.a. publish-subscribe) (initiator = provider and adressee = indirect) versus request/reply, callback (a.k.a. observer/observable), anonymous request/reply
  • Architecture of a DEBS system: data distribution with routing overlay and dissemination, data management layer with representation and processing
  • Routing overlay: centralized architecture versus decentralized architecture (flat versus hierarchical)
  • Dissemination: sensor direct access, flooding-based (data flooding or subscription), selection-based (system wide scope versus limited scope), gossip-based
  • EBS service: notification, advertise, subscribe, publish, notify, producer, consumer
  • Notification filtering: channel-based, subject-based (a.k.a. topic-based), type-based, content-based
  • AMQP: message queue, exchange, binding, binding and routing keys, wildcards (/, # and *)
• Wednesday 10/06
  Workshop (1)
  Workshop, article presentations
  • Workshop schedule,
• Friday 10/08
  DEBS (2/4)
  Distributed Event-Based Systems (2/4)
  • DEBS with topic-based filtering — Continue Lab to discover RabbitMQ
  • AMQP questions after the Topic-Based DEBS lab on RabbitMQ
  • DEBS Lab on the micro-project — Start group communication system
  • AMQP, virtual host
• Home Work
  TODO
  TODO
  • Go as far as you can for the group communication system and the integration phase, and prepare questions on RabbitMQ.
• Tuesday 10/12
  DEBS (3/4)
  Distributed Event-Based Systems (3/4)
  • DEBS — Basics (slides 2/3)
    • Survey paper DEBS for IoT systems
  • DEBS Lab on the micro-project — Continue group communication system
  • DEBS Lab on the micro-project — Start the integration phase
  • MQTT: QoS0/"At most once", QoS1/"At least once", QoS2/"Exactly once", session and CleanSessions, and RETAIN flag, wildcards (/, #, and +)
• Home Work
  TODO
  TODO
  • Go as far as you can for the microproject
  • Prepare questions you have for the microproject, next lab is the last lab.
• Monday 10/18
  DEBS (4/4)
  Distributed Event-Based Systems (4/4)
  • DEBS — Basics (slides 3/3)
    • Addendum
      on the formal specification and distributed algorithms
  • DEBS Lab on the micro-project — group communication system
  • DEBS Lab on the micro-project — the integration phase
  • DEBS Lab on the micro-project — adding authentication
  • DEBS Lab on the micro-project — lobby room
  • Kafka: cluster-based architecture, structured commit/append logs, partitions, consumer groups,
  • Content-based data and filter models: tuples, structured records, semi-structured records (à la XML), objects
• Home Work
  TODO
  TODO
  • Read carefully the microproject subject (info about the defense and the deliverables)
  • Prepare your micro-project defense
  • Return the microproject deliverables on moodle
• Wednesday 11/10
  Defense
  Defense of the Micro-project
  
  • Schedule