Chungnam National UniversityComputer Science and EngineeringDatabase System Laboratory

JBoss & Spring

임형준 (hyungjun25@cnu.ac.kr)

충남대학교 컴퓨터공학과

데이터베이스시스템연구실

2008년 7월 24일 목요일

Chungnam National UniversityComputer Science and EngineeringDatabase System Laboratory

JBoss Overview

2

Operating SystemWindows, Unix, Other Linux

Java Virtual Machine

JBoss Microkernel

Application Platform Other Application Server

JBoss Rules

JBoss jBPM

JBoss Hibernate

JBoss Seam

SOAPlatform

Application Platform

for Portals

Enterprise Platforms Enterprise Frameworks

JBoss Enterprise Middleware System (JEMS)

Chungnam National UniversityComputer Science and EngineeringDatabase System Laboratory

JBoss Enterprise Middleware System (JEMS)

Open source middleware platform for SOA-based enterprise applications and services

Plug-and-play architecture enables standardizing on JEMS products at your own pace

Focused on simplifying development

3

JBoss Microkernel

JBossApp

Server

ApacheTomcat

HibernateJBossCache

JBossjBPM

…JBossRules

Your Applications and Services

JBossPortal

Your Platform Services

JBossEclipse

IDE

#1 #1 #1

Multivendor Java VM, Operating System, Hardware

Chungnam National UniversityComputer Science and EngineeringDatabase System Laboratory

JEMS Architecture

4

Operating System (Windows, Unix = Linux, Solaris, AIX, etc.)

Hardware (CPU + Storage + Memory)

Java Virtual Machine (Sun JVM, BEA JRockit, IBM VM, etc.)

JBoss Application Server 4.x (JMX Microkernel : JBossMX)

Cus

tom

Mbe

ans

Services beyond J2EE

Per

sist

ence

(Hib

erna

te*)

Clu

ster

ing

Cac

hing

(JB

ossC

ache

*)

Wor

kflo

w (J

Bos

s jB

PM

**)

JBos

s A

OP

*

Java Applications (EARs, WARs, JARs, JSPs, Servlets)

JBos

s E

clip

se ID

E

JBoss Portal

--- J2EE 1.4 Services implemented as JMX Mbeans ---

JSP

/Ser

vlet

(Tom

cat*

)

JND

I (JB

ossN

S)

WS

4EE

(JB

ossW

S)

JDBC

JMS

(JB

oss

MQ

)E

JB (J

Bos

s C

MP

)

JTA

(JB

ossJ

TA)

SAAJ

JAC

C

JCA

(JB

ossJ

CA

)JA

AS

(JB

ossS

X)

RM

I-IIO

P (ja

cOR

B)

JAX

-RP

C

Dep

loym

ent A

PI

JAXR

Man

agem

ent A

PI

* Product can run inside JBoss AS or stand-alone** Integration as MBean under development

JAXP

JBos

s R

emot

ing*

Chungnam National UniversityComputer Science and EngineeringDatabase System Laboratory

Spring Framework의 구성

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Chungnam National UniversityComputer Science and EngineeringDatabase System Laboratory

Spring Architecture – Simple Example

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Chungnam National UniversityComputer Science and EngineeringDatabase System Laboratory

Drools

Chungnam National UniversityComputer Science and EngineeringDatabase System Laboratory

What is a Drools?

Drools 3 Released

■ Thursday, June 1, 2006

■ Drools.NET now supports .NET Framework v1.1

JBoss는 가트너가 제시한 Simple Application를 위해서 DBMS를 제외한 모든 패키지 (BPM, BRE, SOA)를 포함

A Java Rules Engine implementation

An object-oriented interface allows for more natural expression of business rules with regards to business objects

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Chungnam National UniversityComputer Science and EngineeringDatabase System Laboratory

Drools Features

Drools is designed to allow pluggeable language implementations

■ Currently rules can be written in Java, Python and Groovy

Drools is written in Java, but able to run on Java and .Net.

Drools provides for Declarative Programming and is flexible enough to match the semantics of your problem domain

■ With Domain Specific Languages (DSL) via XML using a Schema defined for your problem domain

Graphical editing tools, web based tools and developer productivity tools

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Chungnam National UniversityComputer Science and EngineeringDatabase System Laboratory

Why Choose Drools?

Open Source

Declarative Programming

■ Allow you to say “What to do” not “How to do it”

Accessible business rules

Logic and Data Separation

Speed and Scalability

Eclipse IDE

Web based BRMS

■ BRMS: Business rule management system

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Chungnam National UniversityComputer Science and EngineeringDatabase System Laboratory

Drools Modules

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Chungnam National UniversityComputer Science and EngineeringDatabase System Laboratory

Drools Layers

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Chungnam National UniversityComputer Science and EngineeringDatabase System Laboratory

Drools Semantic Modules

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Chungnam National UniversityComputer Science and EngineeringDatabase System Laboratory

Drools Flow view with GWT Diagram

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Chungnam National UniversityComputer Science and EngineeringDatabase System Laboratory

Drools 설치

Drools 엔진 다운로드 및 설치

■ http://www.drools.org/Project+Downloads

■ drools-all-jdk5-2.5-final.jar

■ antlr-2.7.5.jar

■ janino-2.3.15.jar

■ xml-apis-2.0.2.jar

■ xercesImpl-2.7.1.jar

■ Python이나 Groovy로 룰 파일을 작성하려면 Classpath 설정 변경

– 배포파일의 Readme.txt 참고

설치 후 Eclipse에 Plug-in

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Chungnam National UniversityComputer Science and EngineeringDatabase System Laboratory

Rule File 작성

Ex) hello.drl

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<?xml version="1.0" encoding="euc-kr" ?><rule-set name="Hello"

xmlns="http://drools.org/rules"xmlns:java="http://drools.org/semantics/java"xmlns:xs="http://www.w3.org/2001/XMLSchema-instance"xs:schemaLocation="http://drools.org/rules rules.xsd

http://drools.org/semantics/java java.xsd"><import>java.lang.Object</import><import>java.lang.String</import><java:functions>

public static void helloWorld(java.lang.String hello) {System.out.println(hello + " World");

}public static void goodbyeWorld(String goodbye) {

System.out.println(goodbye + " Cruel World");}

</java:functions>

<rule name="Hello World"><parameter identifier="hello">

<class>String</class></parameter><java:condition>hello.equals("Hello")</java:condition><java:consequence>

helloWorld( hello );</java:consequence>

</rule><rule name="Goodbye Cruel World">

<parameter identifier="goodbye"><class>String</class>

</parameter>

<java:condition>goodbye.equals("Goodbye")</java:condition><java:consequence>

goodbyeWorld( goodbye );</java:consequence>

</rule></rule-set>

Chungnam National UniversityComputer Science and EngineeringDatabase System Laboratory

Rule File Tag

Import

■ 자바의 import와 동일하게 룰 파일 내에서 사용할 클래스를 명시

java:functions

■ 룰 파일에서 사용될 함수. 자바의 메소드와 동일

Rule

■ 하나의 규칙을 표현. 룰을 실행할 때 필요한 파라미터, 실행 조건 그리고조건 충족 시 실행될 코드로 구성

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Chungnam National UniversityComputer Science and EngineeringDatabase System Laboratory

Rule Tag

Parameter

■ 룰을 실행하는 데 필요한 파라미터 값

■ identifier 속성을 사용해서 룰에서 사용할 파라미터의 이름을 지정

java:condition

■ 룰을 실행하기 위한 조건

java:consequence

■ 조건이 충족될 경우 실행될 코드

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Chungnam National UniversityComputer Science and EngineeringDatabase System Laboratory

Execute Java File using Rule File

Ex) HelloExample.java

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package javacan.drools.test;

import java.io.IOException;

import org.drools.FactException;import org.drools.IntegrationException;import org.drools.RuleBase;import org.drools.WorkingMemory;import org.drools.io.RuleBaseLoader;import org.xml.sax.SAXException;

public class HelloExample {public static void main(String[] args) throws IntegrationException, SAXException, IOException, FactException {

RuleBase ruleBase = RuleBaseLoader.loadFromUrl(HelloExample.class.getResource("hello.drl") );

WorkingMemory workingMemory = ruleBase.newWorkingMemory();workingMemory.assertObject("Hello");workingMemory.fireAllRules(); // 첫번째 실행

workingMemory = ruleBase.newWorkingMemory();workingMemory.assertObject("Goodbye");workingMemory.fireAllRules(); // 두번째 실행

}}

Result ValueHello WorldGoodbye Cruel World

Chungnam National UniversityComputer Science and EngineeringDatabase System Laboratory

DRL File 작성법

Agenda Group로 룰 파일 작성하기

■ 예를 들어 가족수당을 룰로 만들 경우에 가족수당 룰도 여러 가지 경우의수가 나올 수 있으므로 agenda 그룹으로 만들어야 함

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rule "family-wifCn-pay"agenda-group "family“no-loopwhen

e : Employee (marry =="Y")then

e.setBasicpay(e.getBasicpay() + 10);String log ="가족수당-배우자" + e.getBasicpay();e.message.add(log);

endrule "family-supCn-pay"

agenda-group "family“no-loopwhen

e : Employee (children > 0, children <=4)then

e.setBasicpay(e.getBasicpay() + (e.getChildren() *5));

String log ="가족수당-부양가족" + e.getBasicpay();e.message.add(log);

end