Enterprise Architecture CS 4720 Web & Mobile Systems

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Laureen Nicholson
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1 Enterprise Architecture Web & Mobile Systems

2 The Concept of a Web Service Each service is built around a func=on/feature That func=on is surrounded by a specified set of protocols (SOAP, POX, WSDL, WSD, etc) to govern communica=on Services can be distributed in such a way that then end applica=on is a completely distributed applica=on that is transparent to the end user 2

3 The Concept of a Web Service We are focused on crea=ng a full service Something that has a fully transparent methodology for talking to it Something that can be invoked by remote applica=ons (or other services) All for the purpose of crea=ng a larger system solu=on 3

4 Defining a System Solu=on Computer Science educa=on tends to be rather product focused Build an app that does x Most of you probably think about taking a programming job as going to work for IBM, MicrosoS, etc and building sosware that is actually sold 4

5 Who's the Customer? Think of the number of sosware development companies out there that sell sosware? Name some. What is their business model? Now name some other major companies that you know of who's core business isn t sosware. How does sosware play in their business? Who do you think writes that code? Who are the customers of those systems? 5

6 The Enterprise 6

7 The Enterprise A business, company, or other comparable organiza=on Businesses have business models and goals Businesses have various resources Staff Products Services Informa=on Technology All have to work together to succeed 7

8 Enterprise Architecture The primary purpose of describing the architecture of an enterprise is to improve the effec=veness or efficiency of the business itself. This includes innova=ons in the structure of an organiza=on, the centraliza=on or federa=on of business processes, the quality and =meliness of business informa=on, or ensuring that money spent on informa=on technology (IT) can be jus=fied. 8

9 Enterprise Architecture 9

10 What do we use web services for? Sure, we can use web services to build applica=ons that we distribute or sell to end users But what if we need some very specific services based around our very specific business model? Not necessarily going to be a huge market for that The customer is internal to the business 10

11 How does this relate to web services? SOA and EA both: address similar architectural domains are intended to closely align IT with business use input based on business objec=ves require similar strategies and planning ac=vi=es 11

12 How does this relate to web services? SOA is (in effect) a par=al subset of EA SOA is a poten=al tool in crea=ng a full enterprise architecture Businesses build services around core func=ons/ features in the enterprise For example: UPS might have a service that finds the current loca=on of a package This is an internally created service that has both internal and external uses But what about a service to assign a driver to a route? 12

13 Internal Business Services These services are geared specifically to one par=cular business What are some examples? Our favorite example: SIS PeoplesoS didn't build that from scratch The brought together exis=ng components and make some custom changes to create a new internal business solu=on That's enterprise architecture (and why you need to learn to do it beber) 13

14 So why are we talking about this? Crea=ng web- enabled sosware is not always about building web pages Crea=ng mobile sosware is not always about building consumer apps Web services are about building a sosware solu=on around a very specific problem Where do we see some of the most change in the way the world works? Where is most sosware used? 14

15 That's the why; now the how We ve done web services in PHP/Python, now Appian/BPEL/BPMN, next Java, then.net 15

16 BPMN Business Process Model and Nota=on Latest version from March 2011 Used to model and specify business processes Flowchart- like nota=on Meant to look like UML Meant to be easy for everyone to read and understand 16

17 BPMN 17

18 BPMN 18

19 Appian 19

20 Remember BPEL? BPEL Business Process Execu=on Language An XML format that is meant to orchestrate various func=ons/methods that are built in other languages Takes inputs and outputs and passes them between web services! BPMN can mesh with BPEL 20

21 BPEL Why build from the ground up? Combining web services (WSDL) with BPEL to build your own applica=ons internal to an enterprise Eclipse plugins and open- source projects 21

22 Our Friend Java We know so much, but actually so lible Java has been around for nearly 20 years Lots of people know it Can't hardly find a college CS grad that can't program something in Java 22

23 The Java Family Java is Java is Java no maber what you download/run The core is the same that's the Write Once, Run Anywhere* idea * Well sorta Java might be too big for some devices or need more func=onality for others How do we change that? We change the imports 23

24 The Java Family Any Java applica=on is con=ngent on the libraries you include with it Thus, we have three basic branches of Java, based on the core set of libraries: Java SE (Standard Edi=on): has everything for desktop use, including GUIs, basic threading, etc Java EE (Enterprise Edi=on): has more than SE, and includes packages specifically for enterprise arch Java ME (Mobile Edi=on): has less than SE and a different GUI package 24

25 Java EE's New Packages javax.ejb Enterprise JavaBeans, the core of Java's EA model, includes API for persistence, remote procedure calls, concurrency control, and access to distributed objects javax.jms the Java Message Service provides methods for communica=ng between enterprise objects javax.resource the Java EE Connector allows for connec=ng to applica=on servers 25

26 How is Java EE like Web Services? In a web service 26

27 How is Java EE like Web Services? In Java EE 27

28 Why Java EE? When dealing with business processes, you will osen run into ques=ons like these: What if the server goes down while I'm assigning a route to a truck delivering packages? How do we keep the data secure on our network? We have thousands of people using this system how do we keep it online? I don't want to have to keep rewri=ng business logic for every =ny program we need. 28

29 Java EE Terminology JAR (Java Archive): a collec=on of Java libraries WAR (Web Archive): a Java web applica=on, consis=ng of JSP files and servlets JSP (Java Server Pages): dynamically executed HTML + Java web pages Servlet: pre- compiled, request/respond object, kinda like a pre- compiled PHP page EJB (Enterprise JavaBean): where the business logic lies, exists server- side EAR (Enterprise Archive): a full enterprise solu=on with JARs, WARs, and EJBs inside Applica=on Server / Container: a server that can handle EARs 29

30 How it all fits together 30

Building the Enterprise

Building the Enterprise The Tools of Java Enterprise Edition 2003-2007 DevelopIntelligence LLC Presentation Topics In this presentation, we will discuss: Overview of Java EE Java EE Platform Java EE Development