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  • Welcome to NEJUG

    The New England Java Users Group is open to everyone interested in Java and the JVM. Meetings are usually held on the second Thursday of each month. The meetings and membership are free. We do not hold meetings in July and December. The NEJUG was formed in November 1998. We currently have over 6000 members. Meeting space is limited and we must ask members to register in order to attend meetings. It is common for over 300 people to register for a single meeting! What better way to meet new people interested in Java, development, architecture, or just get your technical questions answered.

  • Want to help?

    NEJUG is a volunteer driven organization, we can always use help from our community members, we can use your help with organizing the monthly meetings, adding new features and maintaining the website etc.,

  • Upcoming Events
      • The 2018 New England Software Symposium


        Friday September, 28, 2018 12:00 AM
        Sheraton Framingham
        1657 Worcester Rd Framingham MA 01701
        10,000 Spots available

      Mark your Calendar!  The 2018 New England Software Symposium returns Sept 28-30th to Framingham.

      The No Fluff Just Stuff Java Symposium Tour Series long considered the premier Java/JVM/Agility Event Series is returning to Boston this fall! Witness first hand the best a conference has to offer: exceptional speakers, content rich ninety (90) minute technical sessions, right sized event model (capped at 250 attendees) all experienced in a vendor free environment.  At a No Fluff Just Stuff event, the focus is entirely on the attendee experience and nothing else!

      **Local Venue, World Class Experience**


      Event Name: 2018 New England Software Symposium
      Dates: Sept 28-30th
      Location: Framingham, MA
      Venue: Sheraton Framingham
      URL: https://nofluffjuststuff.com/conference/boston/2018/09/home

       

      Make sure and use your special JUG discount of $50 by using the promo code nfjsusergroup50 when registering.
      If you are registering with a group, the highest discount will apply - group or JUG discount.

      REGISTRATION FEES:

      Early Bird Individual: $1025/person thru Sept 10th

      Excellent Group Discounts! Available - bring your entire development team to the show:

      5-9 Attendees: $900/person
      10-14 Attendees: $875/person
      15-24 Attendees: $850/person
      25-over Attendees: $825/person


      Why attend?
      -----------------------------------------------------------
      * Excellent Speakers: Authors and Project Leaders
      * Insightful 90 minute Sessions
      * Network with your local developer community
      * No vendor promos
      * Locally Based Event
      * Great Venue
      * Limited Attendance
      * Meaningful Keynote
      * Excellent Giveaways including $250 & $500 Amazon Gift Cards!


      What's Included - Registration Fee:
      ------------------------------------------
      * Three Day All Access Pass
      * Dinner & PM Breaks on Friday & Breakfast/Lunch & Breaks on Saturday/Sunday
      * NFJS Laptop Bag & T-shirt
      * Online Audio Recording of Available Sessions
      * Subscription to NFJS, the Magazine - 2017 (10 Issues from March thru December)

      Go to  https://nofluffjuststuff.com/conference/boston/2018/09/home to see additional information and registration details for the 2018 New England Software Symposium.

       

       

      See you there!

       

      Jay Zimmerman

      2018 NFJS Tour Director

      jzimmerman@bigskytechnology.com

      • Annual NEJUG Holiday Party

        Attending: 1
        Thursday December, 13, 2018 12:00 AM

        79 Spots available

      The NEJUG Holiday Party is scheduled on our normal "second Thursday" in December, but it is not a normal presentation meeting. Instead, it's an "all fun time" event where we get to chat, eat, drink, and socialize.

      Stay tuned for more details -- cost, venue etc.

       

    Sponsors
    Recent Events
      • NEJUG Annual Business Meeting

        Attended: 19
        Thursday July, 12, 2018 06:00 PM
        Constant Contact Reservoir Place
        1601 Trapelo Road Waltham MA 021451
        0

      Every July, the NEJUG Production Team (formerly known as the NEJUG Advisory Group) gathers to discuss various business items. The meeting is open to all members, as usual, there will be food and drinks. Meeting format, however, will be different. There will be no external/guest speakers, rather, there will be roundtable discussions by NEJUG production team members.

      • K8s - Kubernetes

        Attended: 150
        Thursday June, 14, 2018 06:00 PM
        Constant Contact Reservoir Place
        1601 Trapelo Road Waltham MA 021451
        1

      So you have some code and it is in a bounded context with a REST API. You are on your way to Microservices. Next you wrap it in a container and now it is an image that others can run. Simple. Now what? No service is an island. Your service needs to log information, needs to scale and load balance between its clones. Your service needs environment and metadata way outside its context. What about where the service will run? Who starts it? What monitors its health? What about antifragility? Updates? Networking? Oh my.

      Services live in clusters and clusters live in data centers. There are hybrid solutions that span data centers. Many concepts overlap with the features of cloud management. But don't get too flustered since, fundamentally, services are managed by clusters. There are several approaches to cluster management such as Docker Swarm, Mesos with Marathon and Kubernetes.

      Minikube with Kubernetes is an approachable technique to set up a local cluster that is easy to understand and get started. Whether you have a simple service or a Web application with a set of services, you can develop much of it on Kubernetes with Minikube. We will run some practical examples. Once you understand the mechanics of the tools, we will explore how it works, sort through the terminology and share ideas about practical uses for this technology.

      Afterward you will understand how to run your personal cluster with your Linux, OS X or Windows laptop to further enjoy unravelling the mysteries of running applications in a cluster.

    • As Java developers, we have long understood the value of early feedback, unit testing, and Continuous Delivery (CD). As practitioners in a DevOps environment, we tell others how important these practices are. How well do we implement these practices for software intended for DevOps applications? Do we “eat our own dogfood”? In this presentation, I will review an approach taken to apply Continuous Delivery practices with a Java application that creates Jenkins Pipelines.   After hearing the presentation, I hope you will walk away with some ideas on how to implement your Java CD practices in a broader context. 

      Kotlin and Category Theory: Pragmatic Functional Programming 
      by Craig Lubin

      What is Functional Programming (FP) and why should you care? This presentation will provide a simple (but not simplistic) introduction of the science behind both Functional Programming and Category Theory by using simple mathematical concepts and the Kotlin programming language. I will show how to apply these techniques for error handling, IO, and more AND how these techniques can also work in Java (it's not just a "Kotlin thing").
      No prior knowledge of Kotlin or advanced mathematics is required. 

       

       

      • Refactoring Existing Java Code


        Thursday April, 12, 2018 06:00 PM
        Constant Contact Reservoir Place
        1601 Trapelo Road Waltham MA 021451
        2

      When should you refactor code and when should you not do it?  How do you make sure you have adequate test case coverage?  What are the strategies, techniques, and patterns for refactoring existing code?  And how do you get your boss to agree to let you spend the time to refactor code?  This presentation will cover these questions and more.  Topics covered include Acceptance/Approval Testing, Design Patterns, Code Smells, Refactorings, and Tools.

       

      For a deeper dive into related topics of Mob Programming, TDD, and software craftsmanship, join Ethan at the Mob Programming Conference April 12-13 in Burlington, MA.  Several of the presentations are on refactoring.

       

    • Ten steps methodology for designing superior Cloud Native RESTFul Microservices APIs

      In most of the Monolithic applications business objects and data, model designs are already present. As part of moving to cloud, companies miss out of the use-cases the REST APIs need to support. Implementing cloud solutions on top of existing models may lead to performance issues with APIs and cause scalability issues. Clients need to rewrite code due to a new version of APIs.

       

      In this talk, we will explore ten steps methodology for designing superior Cloud Native RESTFul Microservices APIs. Firstly, define the business domain objects and how they relate to use cases. If the use-case is to support <500 ms response time and availability of 99.99%, design the application for Consistency, Availability, and Partition tolerant. Next, Create an ideal design which solves the use-cases, refer to the industry standard JSONs and designs from schema.orgiana.org, and ​microformats.org. Later, find the fail points in the process and go back to the first step to resolving the pain points: Go back to Define the problem. Question to ask is what can go wrong? When can it go wrong? Next, create Facade pattern to connect to either existing Monolithic App or create a new App to support the new cloud use-cases. Create API Gateway, so other companies can build software and create more offerings. Next, design common Layers for error handling, logs, and security. For API security, perform Threat Modeling to find security vulnerabilities and plan for mitigation of risks. Use generic authentication using SAML, OAuth, and JWT to support Authentication and Authorization. Next, create API Versioning strategy so that the REST API can evolve with minimal client changes. Apply Cloud Native design patterns for Resiliency. In the end, test APIs using contract driven testing and PACT files.

    • We all have seen our share of bad code and some really good code as well. What are some of the common anti patterns that seem to be recurring over and over in code that sucks? By learning about these code smells and avoiding them, we can greatly help make our code better. Come to this talk to learn about some common code smell and how to improve the quality of code.  

      This presentation is sponsored by the No Fluff, Just Stuff / Software Symposium. The next NFJS event in the Boston area is scheduled for March 16 - 18, 2018 in Wakefield. Venkat is on the roster for that event - which is a great way to get more of him and choose from many other top-tier speakers. Plan ahead and allocate that weekend for a great training, growth, and networking event!

  • NEJUG Calendar


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    What is NEJUG Lightning Talk?

    Presentation videos


    Algebraic Databases from Nejug Video on Vimeo.


    Debugging Backwards in Time from Nejug Video on Vimeo.


    Essential Spring Boot from Nejug Video on Vimeo.


    Love your Architecture, Or, How to Organize Your Code from Nejug Video on Vimeo.

    Want to present a short talk?

    Lightning Talks are short 10-15 minutes presentation on any subject matter, this mainly to encourage our NEJUG members to engage, develop and improve presentation skills.


    Help us choose the next subject

    We strive to bring presentations that are interesting and trending, but we would also like to hear from our community members about what subject matters they are interested in. Please let us know about your topic suggestions.