605.784.8VL - Enterprise Computing with Java

Expanded Course Description

This comprehensive course explores core application aspects for developing, configuring, securing, deploying, and testing a Java-based service using a layered set of modern frameworks and libraries that can be used to develop full services and microservices to be deployed within a container. The emphasis of this course is on the center of the application (e.g., Spring, Spring Boot, Spring Data, and Spring Security) and will lay the foundation for other aspects (e.g., API, SQL and NoSQL data tiers, distributed services) covered in related courses.

Students will learn thru lecture, examples, and hands-on experience in building multi-tier enterprise services using a configurable set of server-side technologies.

Students will learn to:

• Implement flexibly configured components and integrate them into different applications using inversion of control, injection, and numerous configuration and auto-configuration techniques

• Implement unit and integration tests to demonstrate and verify the capabilities of their applications using JUnit

• Implement API access to service logic using using modern RESTful approaches that include JSON and XML

• Implement data access tiers to relational and NoSQL (MongoDB) databases using the Spring Data framework

• Implement security mechanisms to control access to deployed applications using the Spring Security framework

• Package, run, and test services within a Docker container

Using modern development tools students will design and implement several significant programming projects using the above-mentioned technologies in an environment that they will manage.

The course is continually updated and currently based on Java 21, Maven 3, Spring 6.x, and Spring Boot 3.x.

Course Structure

Lectures are conducted live each week and reflect recent/ongoing student activity. Students may optionally attend the lecture live at JHU, online, and/or watch the recording based on their personal schedule and review. There is no required attendance for the live lecture. Emphasis will be made to make the recorded video a valuable asset in all cases.

The course materials consist of a large set of examples that you will download, build, and work with locally. The course also provides a set of detailed course notes for each lecture and an associated assignment active at all times during the semester. Topics and assignments have been grouped into application development, service/API tier, containers, data tier. Each group consists of multiple topics that span one or more weeks.

The examples are available in a GitLab public repository. The course notes are available in HTML and PDF format for download. All content or links to content is published on the course public website (https://jcs.ep.jhu.edu/ejava-springboot/). To help you you locate and focus on current content and not be overwhelmed with the entire semester, examples and links to content are activated as the semester progresses. A list of "What is new" and "Student TODOs" is published weekly before class to help you keep up to date and locate relevant material. The complete set of content from the previous semester is always available from the legacy link (https://jcs.ep.jhu.edu/legacy-ejava-springboot/)

Course Topics

• Course Introduction
• Spring/Spring Boot Introduction
• Spring Boot Configuration
• Logging
• Testing
• Web API
• Spring Security
• AOP and Method Proxies
• Integration Testing and Containers
• JPA Mapping
• MongoDB Mapping
• Validation
  

Detailed Syllabus

Course Goals

The goal of this course is to master the design and development challenges of a single application instance to be deployed in an enterprise-ready Java application framework. This course provides the bedrock for materializing broader architectural solutions within the body of a single instance.

Textbooks

not required

Required Software

Students are required to establish a local development environment.

1. Software you will need to load onto your local development environment:
   1. Git Client
   2. Java JDK 21
   3. Maven 3 (>= 3.6.3)
   4. IDE (IntelliJ IDEA Community Edition or Pro or Eclipse/STS)
      • The instructor will be using IntelliJ IDEA CE in class, but Eclipse/STS is also a good IDE option. It is best to use what you are already comfortable using.
   5. JHU VPN (Open Pulse Secure) -- workarounds available
2. Software you will ideally load onto your local development environment:
   1. Docker
      • Docker can be used to automate software installation and setup and implement deployment and integration testing techniques. Several pre-defined images, ready to launch, will be made available in class.
   2. curl or something similar
   3. Postman API Client or something similar
3. Software you will need to install if you do not have Docker
   1. MongoDB
4. High visibility software you will use that will get downloaded and automatically used through Maven.
   1. application framework (Spring Boot, Spring).
   2. SLF/Logback
   3. a relational database (H2 Database Engine) and JPA persistence provider (Hibernate)
   4. JUnit
   5. Testcontainers

Student Coursework Requirements

Assessment	% of Semester Grade
Class/Newsgroup Participation	10% (9pm EST, Wed weekly cut-off)
Assignment 0: Application Build	5% (##)
Assignment 1: Application Config	20%
Assignment 2: Web API	15%
Assignment 3: Security	15%
Assignment 4: Integration Testing and Containers	10%
Assignment 5: Database	25%

• ## Assignment 0 will be graded on a done (100)/not-done(0) basis and must be turned in on-time in order to qualify for a REDO. 

Grading Policy

• 100 >= A >= 90 > B >= 80 > C >= 70 > F

Course Policies

• Late assignments will be deducted 10pts/week late, starting after the due date/time, with a one-time exception. A student may submit a single project up to 4 days late without receiving approval and still receive complete credit. Students taking advantage of the "free first pass" should still submit an e-mail to the instructor and grader(s) notifying them of their intent.
• Class attendance is strongly recommended, but not mandatory. The student is responsible for obtaining any written or oral information covered during their absence. Each session will be recorded. A link to the recording will be posted on Canvas.
• Collaboration of ideas and approaches are strongly encouraged. You may use partial solutions provided by others as a part of your project submission. However, the bulk usage of another students implementation or project will result in a 0 for the project. There is a difference between sharing ideas/code snippets and turning in someone else’s work as your own. When in doubt, document your sources.
• Do not host your course assignments in a public Internet repository.

Academic Policies

Deadlines for Adding, Dropping, and Withdrawing from Courses

Students may add a course up to one week after the start of the term for that particular course. Students may drop courses according to the drop deadlines outlined in the EP academic calendar. Between the 6th week of the class and prior to the final withdrawal deadline, a student may withdraw from a course with a W on their academic record. A record of the course will remain on the academic record with a W appearing in the grade column to indicate that the student registered and withdrew from the course. 

Academic Misconduct Policy

All students are required to read, know, and comply with the Johns Hopkins University Krieger School of Arts and Sciences (KSAS) / Whiting School of Engineering (WSE) Procedures for Handling Allegations of Misconduct by Full-Time and Part-Time Graduate Students. This policy prohibits academic misconduct, including but not limited to the following: cheating or facilitating cheating; plagiarism; reuse of assignments; unauthorized collaboration; alteration of graded assignments; and unfair competition. Course materials (old assignments, texts, or examinations, etc.) should not be shared unless authorized by the course instructor. Any questions related to this policy should be directed to EP’s academic integrity officer at ep-academic-integrity@jhu.edu.

Students with Disabilities - Accommodations and Accessibility

Johns Hopkins University values diversity and inclusion. We are committed to providing welcoming, equitable, and accessible educational experiences for all students. Our courses are designed with a proactive approach to accessibility to minimize the need for disability disclosure and accommodation requests, but we recognize that you may need additional support. Students with disabilities (including those with psychological conditions, medical conditions, and temporary disabilities) can request accommodations for this course by providing an Accommodation Letter issued by Student Disability Services (SDS). Please request accommodations for this course as early as possible to provide time for effective communication and arrangements.  For further information or to start the process of requesting accommodations, please contact EP Student Disability Services at ep-disability-svcs@jhu.edu. 

Student Conduct Code

The fundamental purpose of the JHU regulation of student conduct is to promote and to protect the health, safety, welfare, property, and rights of all members of the University community as well as to promote the orderly operation of the University and to safeguard its property and facilities. As members of the University community, students accept certain responsibilities which support the educational mission and create an environment in which all students are afforded the same opportunity to succeed academically. For a full description of the code please visit the Student Conduct Code website.

Classroom Climate

JHU is committed to creating a classroom environment that values the diversity of experiences and perspectives that all students bring. Everyone has the right to be treated with dignity and respect. Fostering an inclusive climate is important. Research and experience show that students who interact with peers who are different from themselves learn new things and experience tangible educational outcomes. At no time in this learning process should someone be singled out or treated unequally on the basis of any seen or unseen part of their identity. If you have concerns in this course about harassment, discrimination, or any unequal treatment, or if you seek accommodations or resources, please reach out to the course instructor directly. Reporting will never impact your course grade. You may also share concerns with your program chair, the Assistant Dean for Diversity and Inclusion, or the Office of Institutional Equity. In handling reports, people will protect your privacy as much as possible, but faculty and staff are required to officially report information for some cases (e.g. sexual harassment).

Course Auditing

When a student enrolls in an EP course with “audit” status, the student must reach an understanding with the instructor as to what is required to earn the “audit.” If the student does not meet those expectations, the instructor must notify the EP Registration Team (EP-Registration@exchange.johnshopkins.edu) in order for the student to be retroactively dropped or withdrawn from the course (depending on when the "audit" was requested and in accordance with EP registration deadlines). All lecture content will remain accessible to auditing students, but access to all other course material is left to the discretion of the instructor.