Belfast Java User Group

1. Belfast Java User Group Stuart Greenlees Eamonn Long Niall McLoughlin Wednesday 23/10/2013

2. Belfast Java User Group • Agenda • Introduction to the Belfast JUG • What is a JUG? • Some Logistics • How can you get involved? • JavaOne Key Notes • 20+ New Features of JEE7 • Extras

3. What is a JUG? Belfast Java User Group

4. Java User Groups (JUGs) are volunteer organizations that strive to distribute Java-related knowledge around the world. They provide a meeting place for Java users to get information, share resources and solutions, increase networking, expand Java Technology expertise, and above all, drink beer, eat pizza and have fun. Belfast Java User Group

5. Relation to Tech Forums? Relation to LIT? Belfast Java User Group

6. Meet Quarterly Belfast Java User Group

7. Where can I find the Belfast JUG? JUG Page on Java.Net: https://java.net/projects/belfast-jug The Belfast JUG is on the MAP! Belfast Java User Group

8. What are the Goals of the JUG? Key Establish Regular meetings of Java Users in Belfast Share Information about Java Get people involved Optional Adopt a JSR - https://java.net/projects/adoptajsr/pages/Home Adopt Open JDK - https://java.net/projects/adoptopenjdk/pages/AdoptOpenJDK Belfast Java User Group

9. How can you get involved? We Need Help! Create a Belfast JUG logo Create a simple website/wikki out on Java.Net Contribute content Join the Java.Net project Post topic suggestions you would like to here about Post recommendations of any good speakers you would like to hear from Contributing to OpenSource we would love to hear from you E.g. Night-hacking with Raspberry Pi Post Content on the java.net wiki/mailing list Belfast Java User Group

10. How Do I sign Up? Belfast Java User Group

11. JUG Leadership Team Stuart Greenlees – s.greenlees@liberty-it.co.uk Eamonn Long (a.k.aBlueArsedFly) – e.long@liberty-it.co.uk Niall McLoughlin – n.mclouoghlin@liberty-it.co.uk Belfast Java User Group

12. JavaOne 2013 Keynote Speech Internet of Things Java 8 JEE7

13. Java 8 – What is a Lambda? Lambda expressions are anonymous methods ArgumentsArrow Expression or {Statement} person -> person.getAge() > minimumAge Example usage with new Iterable.forEach default method: employees.forEach(e -> e.setSalary(e.getSalary() * 1.03)); The general syntax consists of an argument list, the arrow token ->, and a body. The body can either be a single expression, or a statement block. In the expression form, the body is simply evaluated and returned. In the block form, the body is evaluated like a method body. Benefits Internal Iteration Pass Behaviour not just Data Fluent Pipelined Operations Lazy Evaluation Parallelization

14. Java 8 –Streams A stream is a sequence of elements. Unlike a collection, it is not a data structure that stores elements. Instead, a stream carries values from a source, such as collection, through a pipeline. int sum = widgets.stream() .filter(w -> w.getColor() == RED) // Filter .mapToInt(w -> w.getWeight()) // Map .sum(); // Collect The operations filter, map, and forEach are aggregate operations. Aggregate operations process elements from a stream, not directly from a collection. A pipeline is a sequence of stream operations, which in this example is filter-map-sum. In addition, aggregate operations typically accept lambda expressions as parameters, enabling you to customize how they behave.

15. Java 8 – Lambda Stream Methods public interface Stream<T> extends BaseStream<T, Stream<T>> { /** * Returns a stream consisting of the elements of this stream that match * the given predicate. * * @param predicate a <a href="package-summary.html#NonInterference"> * non-interfering, stateless</a> predicate to apply to * each element to determine if it should be included * @return the new stream */ Stream<T> filter(Predicate<? super T> predicate); /** * Returns a stream consisting of the results of applying the given * function to the elements of this stream. * * @param <R> The element type of the new stream * @param mapper a <a href="package-summary.html#NonInterference"> * non-interfering, stateless</a> function to apply to each * element * @return the new stream */ <R> Stream<R> map(Function<? super T, ? extends R> mapper); }

16. Lambda – Filtering / Mapping Filtering List<Person> eligibleVoters = potentialVoters. stream(). // Get the List of voters as a Stream filter(p -> p.getAge() > legalAgeOfVoting). // Filter using Predicate collect(Collectors.toList()); // Convert Stream Back to List Mapping return mixedCaseStrings. stream(). // Get Stream from List map(s -> s.toUpperCase()). // Convert Value collect(Collectors.toList()); // Convert Back to List

17. Lambda – Method References // Reference to a Static method Arrays.asList("a", "b", "c").forEach(Printers::print) // Reference to an method on an instance public static void printPages(Document doc, int[] pageNumbers) { Arrays.stream(pageNumbers). map(doc::getPageContent). forEach(Printers::print); }

18. Java 8 – Lambda http://openjdk.java.net/projects/lambda/ Streams – Brian Goetz/Paul Sandoz CON7942_Sandoz-javaone-streamstopgear.pdf Stuart Marks TUT3877_Marks-JumpStartingLambda-v6.pdf Brian Goetz – State of the Lambda http://cr.openjdk.java.net/~briangoetz/lambda/lambda-state-final.html Java Tutorial http://docs.oracle.com/javase/tutorial/java/javaOO/lambdaexpressions.html JUnit Based Tutorial https://github.com/AdoptOpenJDK/lambda-tutorial

19. Adam Bien – Java Rockstar http://www.adam-bien.com/roller/abien/ Lightweight Java EE Architectures (Free Devcast) http://www.adam-bien.com/roller/abien/entry/lightweight_java_ee_architectures_a Rethinking JEE Design Patterns EJB’s are cool No need for DAO’s with EntityManager No need for DTO’s with JPA Entity No need to have an interface for every class Setting up JEE7 projects with Maven3 http://www.adam-bien.com/roller/abien/entry/setting_up_java_ee_7 Starting WebSphere with Java EE 6...in 3 seconds http://www.adam-bien.com/roller/abien/entry/starting_websphere_with_java_ee

20. Building Modular Cloud Apps - Luminis Technologies http://luminis-technologies.com

21. 20+ New Features of JEE7

22. 20+ New Features of JEE7 Bean Validation: Method Validation

23. 20+ New Features of JEE7 Concurrency: ManagedExecutor

24. 20+ New Features of JEE7 JPA: Schema Generation

25. 20+ New Features of JEE7 JPA: @Index

26. 20+ New Features of JEE7 JPA: Stored Procedure

27. 20+ New Features of JEE7 JTA: @Transactional

28. 20+ New Features of JEE7 JTA: @TransactionScoped

29. 20+ New Features of JEE7 JMS: JMSContext API

30. 20+ New Features of JEE7 JMS: Autocloseable

31. 20+ New Features of JEE7 Servlet: Improved Security

32. 20+ New Features of JEE7 WebSocket: Annotated server endpoint

33. 20+ New Features of JEE7 WebSocket: Annotated client endpoint

34. 20+ New Features of JEE7 JSF: Faces Flow

35. 20+ New Features of JEE7 JSF: Pass-through Attributes

36. 20+ New Features of JEE7 JSF: File Upload Component

37. 20+ New Features of JEE7 JAX-RS: Client API

38. 20+ New Features of JEE7 JAX-RS: Async Client

39. 20+ New Features of JEE7 JAX-RS: Async Server

40. 20+ New Features of JEE7 JSON-P: JSON Builder

41. 20+ New Features of JEE7 Batch: Chunk-style Processing

42. 20+ New Features of JEE7 Batch: Chunk-style processing

43. 20+ New Features of JEE7 Batch: Batchlet-style Processing

44. 20+ New Features of JEE7 Batch: Job/Step/Chunk Listeners

45. 20+ New Features of JEE7 Batch: Job/Step/Chunk Listeners

46. 20+ New Features of JEE7 Batch: Creating Workflows

47. 20+ New Features of JEE7 Batch: Creating Workflows

48. Ten Tips for Unit Tests • Think Before Testing • Input Data • What is it called • Expected Output • Make the tests understandable • Comments • Expected Behaviour • Diagnostics • Small and Simple • Use setup and teardown • Separate test logic from setup to make it easier to debug • Test 1 thing only • One scenario per test so its more obvious why it failed • Enables faster debugging • Fast Tests only • Run as often as possible • Quick results • Maintain quaility bar • More likely that devs will run with every change • Absolute Repeatability • Must trust each test • Independent Tests only • Must run in any order • No dependencies • Diagnostics on Failure • Message in assets • Reference input data • Record test environment info • Make it simple to debug • No hard coding environment • Chained exceptions • Use configfiles for portability • Mock objects • No databases • No Extraneous Output • Too much output == confusion • Slient test • Use option/config to turn debug on

49. Stress Testing – Arquillian & JMeter http://arquillian.org/ Arquillianbrings the test to the runtime so you don’t have to manage the runtime from the test (or the build). Arquillian eliminates this burden by covering all aspects of test execution, which entails: • Managing the lifecycle of the container (or containers) • Bundling the test case, dependent classes and resources into a ShrinkWrap archive (or archives) Executing the tests inside (or against) the container http://jmeter.apache.org/ Apache JMeter- may be used to test performance both on static and dynamic resources (Files, Web dynamic languages - PHP, Java, ASP.NET, etc. -, Java Objects, Data Bases and Queries, FTP Servers and more). It can be used to simulate a heavy load on a server, group of servers, network or object to test its strength or to analyze overall performance under different load types. You can use it to make a graphical analysis of performance or to test your server/script/object behavior under heavy concurrent load.

50. Security – OWASP Top 10 Web App Defenses • SQL Injection Defence • Query Parameterization • Password Defences • Don’t limit length • credential-specific salt • Keyed functions • Multi-Factor Authentication • SMS / Mobile App / Tokens • Cross Site Scripting Defence • OWASP Java Encoder • OWASP HTML Sanitizer • JSHtmlSanitizer • Cross Site Request Forgery Defence • CSRFCryptographic Tokens • Re-authentication • Controlling Access • Apache Shiro - comprehensive solution to authentication, authorization, cryptography, and session management. • Clickjacking Defence • response.addHeader( "X-FRAME-OPTIONS", "SAMEORIGIN" ); • App Layer Intrusion Detection • Input validation failure server side on non-user editable parameters • OWASPAppSensor Project • Encryption in Transit (HTTPS/TLS) • Credentials and Session IDs Encrypted in Transit • Use HTTPS/TLS from login to logout • Certificate Pinning • File Upload Security Jim Manicohttps://oracleus.activeevents.com/2013/connect/fileDownload/session/0C826D948B4001909E22C76D363E0E86/CON5523_Manico-Top%20Ten%20Defenses%20v11.ppt