Liberty Right Fit for MicroProfile

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1 IBM _ 1 Liberty Right Fit for MicroProfile Alasdair Nottingham, IBM, STSM, WebSphere Runtime Architect Kevin Sutter, IBM, STSM, Java EE Architect JavaOne Sept 2016

2 Who Are We? Kevin Sutter WebSphere Java EE architect Alasdair Nottingham WebSphere Liberty architect

3 What is MicroProfile? Optimizing Enterprise Java for a Microservices Architecture Complements Java EE not a replacement for Java EE 3

4 A long time ago in a country far, far away Our development team has a lot of recurring meetings: Design issues Iteration demos Release planning Everyone dials in ok, but we tend to have a lot of confusion about the e-meeting at the start of every call: Are we on the primary or secondary e-meeting today? Who s hosting this call anyway? Has anyone seen Erin today? She s not online Is it lunchtime yet? 4

liberty/meetings/designissues Meeting owner can

hasn t started yet, or automatically redirected to

5 But then, we had an idea! What if we had one URL for every recurring meeting? e.g. Meeting owner can configure their e-meeting Participants notified if it hasn t started yet, or automatically redirected to the e-meeting Anyone can take over the meeting if the owner doesn t show up 5

6 What happens when we re away 6

7 and again 7

8 and again 8

9 and again 9

10 So where do we start? Well, we need an app server 10

11 We want something very simple now Start small, fast, and simple Pay only for what your application needs servlet jsp Feature Manager HTTP Transport Application Manager

12 that will scale with the needs of our app zoswlm zossecurity zostransaction collectivecontroller clustermember mongodb jaxb jaxws wssecurity wmqjmsclient jmsmdb wasjmssecurity concurrent wasjmsclient wasjmsserver oauth collectivemember ldapregistry webcache ejblite cdi managedbeans jaxrs osgi.jpa localconnector beanvalidation blueprint restconnector ssl jsf wab json appsecurity jsp monitor sessiondatabase servlet Feature Manager jpa HTTP Transport jndi Application Manager jdbc

13 that supports rapid development Sparse configuration intelligent defaults, configure only what you need Automating reloading of configuration and applications

14 so we decide to use Liberty Java EE Web profile support in ~50 Mb archive Starts in a couple second and only uses 50 Mb RAM From lightweight development to the largest production app, Liberty scales with the requirements of your application Startup & Footprint Comparison of various lightweight servers Startup time in seconds (Lower is Better) Tomcat JBoss 7.0 Web Profile GlassFish 3.1 Web Profile Liberty Profile Footprint in MB (Lower is Better) First 2Gb RAM in production free! Startup time Footprint

15 Ok, let s get started! Meeting App Database Great! but how do we start building it? We re going to need a REST service some kind of singleton

16 Solution: MicroProfile 1.0 microprofile-1.0 JAX-RS is the Java EE API for creating RESTful web services We ll use JAX-RS to expose REST services for the list of meetings, a particular meeting s details, and updating both CDI (Context and Dependency Injection) provides for simple POJO managed beans We ll use CDI managed beans to ensure that we only have a single list of meetings and users (which can then be injected into other beans) JSON-P provides for parsing JSON documents We ll use JSON-P for processing the JSON arguments on the JAX-RS services

17 Solution: CDI cdi-1.2 CDI (Context and Dependency Injection) provides for simple POJO managed beans Included in the Java EE web profile (and microprofile-1.0!) We ll create a managed bean to ensure that we only have a single list of meetings and users (which can then be injected into other beans)

18 Time to code! Install the WebSphere Developer Tools from the Eclipse Marketplace Supports WAS v7, v8, v8.5, and v9, including Liberty Could also use the extended set of tools available in Rational Application Developer or Rational Software Architect

19 Demo Building a MicroProfile application

20 Ok, we have a MicroProfile service! or do we? How do we test it?? Meeting App How do we tell someone how to build the front end? 20

21 Solution: API Discovery apidiscovery-1.0 Swagger is the defacto standard for documenting REST services API Discovery feature adds Swagger support to Liberty Merges Swagger from annotations or separate Swagger docs Documentation! Provides API Explorer to browse and test REST services Testing!

22 Demo Using Swagger to define our API

23 Ok, now on to the client! Trouble is, neither of us are great at web UI 23

24 Time to call Erin! Hey Erin, could you throw together a UI for us? But I only do microservices now! Ok, ok. Try this out 24

25 Demo The New UI

26 Architect intervention Hey, don t take all the glory! Share the project so I can code too! I hear you got promoted. Sure you still know how? L 26

27 Demo Sharing code via Git

28 Going beyond MicroProfile 1.0 The first release of MicroProfile is limited (by design) But, that doesn t stop us from using additional features available in Liberty... 28

29 Problem: Old data lying around Hey, I just tried the app and it joined me to last week s e-meeting! It should really clean things up Well, I guess I *did* say I wanted to code 29

30 Solution: Concurrency Utilities concurrent-1.0 Concurrency Utilities is the Java EE API for concurrency and background tasks Builds on Java SE concurrency, but supports running within a container/managed thread environment. Context is propagated from the main thread We ll use concurrency utilities to kick off a background task and clean up the meeting URL

31 Demo Background tasks with Concurrency Utilities

32 Problem: Persisting meeting data While you re at it, it would be nice if we didn t have to recreate the meetings every time we restart the server Nuf said 32

33 Solution: MongoDB mongodb-2.0 There are lots of options for persistence: JDBC, JPA, CouchDB, MongoDB, in this case we just want something simple and pick MongoDB We ll use MongoDB to persist meeting details

34 Demo Using MongoDB for Persistence

35 Performance concerns After some initial use, we notice an awful lot of traffic on the server 35

36 Solution: WebSockets websocket-1.1 The WebSocket protocol is a standard for efficient, bi-directional communication Standardized for Java via WebSocket API and part of the Java EE 7 spec We ll use WebSockets to notify clients when a meeting is started to avoid polling (and, thus, improve performance)

37 Demo Using WebSockets

38 Great, the app is finally complete! But where do we want to host the app??

39 Option 1: Liberty server package We could use a Liberty server package for deployment server package creates archive of config + app + runtime (optional) for redistribution minify option creates a completely custom server

40 Option 2: SoftLayer VMWare on IBM Cloud We could host WAS Liberty VMs in the cloud on

g. # of instances, memory required) and Bluemix does the rest: Sets up

41 Option 3: Bluemix Bluemix is an open-standards, cloud-based platform for building, managing, and running apps of all types Deploy an application artifact (e.g..war) with minimal direction (e.g. # of instances, memory required) and Bluemix does the rest: Sets up infrastructure, deploys runtime & artifact, binds services, routes traffic,

42 Demo Production on Bluemix

43 Yay! We re done! Everyone open your phones and go to:

44 A look back at the hour Application, configuration, and even feature changes happen automatically! Minimal restarts microprofile mongodb Consistent, simple experience for each new feature

45 Configurability of Liberty  <featuremanager> <feature>microprofile-1.0</feature> <! - cdi, jaxrs, jsonp --> <feature>concurrent-1.0</feature> <! - background tasks --> <feature>mongodb-2.0</feature> <! - persistence --> <feature>websocket-1.1</feature> <! - performance --> <! - make it real... --> <feature>appsecurity-2.0</feature> <! - basic app security --> <feature>ssl-1.0</feature> <! - ssl support --> </featuremanager> 45

46 WebSphere Liberty: The Right Fit for MicroProfile and Java EE

47 MicroProfile 1.0 Released! Microservice Collaboration and Innovation in the Java Community MicroProfile BOF, Tuesday 10:30-11:30, Hilton Lombard Room (3rd tower, 6th floor) microprofilelunch.com, Thursday 11:30am - 2:00pm Learn more at microprofile.io

48 IBM _ 48 Thank You! Alasdair Nottingham Kevin Sutter

49 What we didn t cover Cool things you can do with the config, including variables, references, config dropins, Cool things in the latest release, including the Bluemix service utility, Liberty s clean API and classloader visibility ensure your applications are portable Zero migration ensures our app and configuration will run for years to come

50 Visit WASdev.net for all things Liberty!

51 Demos JAX-RS & CDI Managed Bean API-Discovery Client UI Git JSR-236 Concurrency MongoDB WebSockets Publish to Bluemix 51

16562: Liberté, Égalité, Fraternité a Mini CICS and WebSphere Revolution

16562: Liberté, Égalité, Fraternité a Mini CICS and WebSphere Revolution Phil_Wakelin@uk.ibm.com CICS Strategy & Design, IBM Hursley UK Abstract Liberté, Égalité, Fraternité (Liberty, Equality, Fraternity),