osgi and the enterprise a match made in a box? · pdf fileseptember 23rd 2010 11 java vm log4j...

OOOOOOSSSSSSGGGGGGiiiiii aaaaaannnnnndddddd tttttthhhhhheeeeee EEEEEEnnnnnntttttteeeeeerrrrrrpppppprrrrrriiiiiisssssseeeeeeAAAAAA mmmmmmaaaaaattttttcccccchhhhhh mmmmmmaaaaaaddddddeeeeee iiiiiinnnnnn aaaaaa .................. bbbbbbooooooxxxxxx??????

Holly [email protected] StuttgartSept 23, 2010

mailto:[email protected]

2September 23rd 2010

AAAAAA ((((((vvvvvveeeeeerrrrrryyyyyy)))))) bbbbbbrrrrrriiiiiieeeeeeffffff hhhhhhiiiiiissssssttttttoooooorrrrrryyyyyy ooooooffffff pppppprrrrrrooooooggggggrrrrrraaaaaammmmmmmmmmmmiiiiiinnnnnnggggggIn the beginning, there were bits ...

0101011101001001010010010011011101101101101


AAAAAA ((((((vvvvvveeeeeerrrrrryyyyyy)))))) bbbbbbrrrrrriiiiiieeeeeeffffff hhhhhhiiiiiissssssttttttoooooorrrrrryyyyyy ooooooffffff pppppprrrrrrooooooggggggrrrrrraaaaaammmmmmmmmmmmiiiiiinnnnnnggggggThen came words ...

mov ah,9mov dx,offset hello_messageint 21h


AAAAAA ((((((vvvvvveeeeeerrrrrryyyyyy)))))) bbbbbbrrrrrriiiiiieeeeeeffffff hhhhhhiiiiiissssssttttttoooooorrrrrryyyyyy ooooooffffff pppppprrrrrrooooooggggggrrrrrraaaaaammmmmmmmmmmmiiiiiinnnnnngggggg... functions and libraries ...

#include <stdio.h>main() {

printf ("Hello World!\n");}


AAAAAA ((((((vvvvvveeeeeerrrrrryyyyyy)))))) bbbbbbrrrrrriiiiiieeeeeeffffff hhhhhhiiiiiissssssttttttoooooorrrrrryyyyyy ooooooffffff pppppprrrrrrooooooggggggrrrrrraaaaaammmmmmmmmmmmiiiiiinnnnnngggggg... objects ...

public class HelloWorldSayer {

public void sayHello() { System.out.println("Hello, world!\n"); }}


AAAAAA ((((((vvvvvveeeeeerrrrrryyyyyy)))))) bbbbbbrrrrrriiiiiieeeeeeffffff hhhhhhiiiiiissssssttttttoooooorrrrrryyyyyy ooooooffffff pppppprrrrrrooooooggggggrrrrrraaaaaammmmmmmmmmmmiiiiiinnnnnngggggg... and now - Enterprise OSGi

<service ref="helloservice" interface="helloworld.HelloWorldService" />

public class HelloWorldClient {HelloWorldService service =

null;public void startUp() {

service.hello();}

}


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IDL JDBC JNDI JAXP JAAS JMX RMI-IIOP

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Servlet JSP

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Java

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WS

Met

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Man

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Direct dependency

Optional dependencies

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Deb

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StAX

Indirect (soft) dependencyJA

X-RS

JASP

IC

CDI &

DI


IDL JDBC JNDI JAXP JAAS JMX RMI-IIOP

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Servlet JSP WWWWWWeeeeeebbbbbb CCCCCCoooooonnnnnnttttttaaaaaaiiiiiinnnnnneeeeeerrrrrr

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JSTL JSF

JAXB

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Debu gCom

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StAX

Indirect (soft) dependencyJA

X-RS

JASP

IC

CDI &

DI

((((((ccccccaaaaaappppppaaaaaabbbbbbiiiiiilllllliiiiiittttttyyyyyy ============ bbbbbbllllllooooooaaaaaatttttt))))))??????

HTTP Session Replication Connection Management Persistence Providers User Registries Event Mgmt

Logging and Tracing MBean Server Admin Consoleand scripting

DataSources Messaging Engines Security

Transport Channels Workload Management HTTP Servingand routing

High AvailabilityManagement

Transaction Loggingand Recovery

Thread management Classloading Provisioning Monitoring Policy and SLAmgmt Configuration

………………


I DL J DBC J NDI J AX P J A AS J MX RMI - I I OP

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S e r vl e t J S P

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St

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I n d i r e c t ( s o f t ) d e pe n de n c y

JA

X-

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JA

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IC

CD

I &

DI

BBBBBBeeeeeeyyyyyyoooooonnnnnndddddd JJJJJJaaaaaavvvvvvaaaaaa EEEEEEEEEEEE………………

HTTP Session Replication Connection Management Persistence Providers User Registries Event Mgmt

Logging and Tracing MBean Server Admin Consoleand scripting

DataSources Messaging Engines Security

Transport Channels Workload Management HTTP Servingand routing

High AvailabilityManagement

Transaction Loggingand Recovery

Thread management Classloading Provisioning Monitoring Policy and SLAmgmt Configuration

………………

Batch Telephony BPM DynamicScripting

SCA BusinessRules

Complex EventProcessing

………………


JJJJJJaaaaaavvvvvvaaaaaa VVVVVVMMMMMM

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ccccccoooooommmmmmmmmmmmoooooonnnnnnssssss

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............

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bbbbbbsssssshhhhhh

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………………

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pppppplllllluuuuuuggggggiiiiiinnnnnn

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OOOOOOSSSSSSGGGGGGiiiiii ttttttoooooo tttttthhhhhheeeeee rrrrrreeeeeessssssccccccuuuuuueeeeee!!!!!!

• OSGi is almost essential in this kind of situation


OOOOOOSSSSSSGGGGGGiiiiii BBBBBBuuuuuunnnnnnddddddlelelelelelessssss aaaaaarrrrrreeeeee ddddddiiiiiiffffffffffffeeeeeerrrrrreeeeeennnnnntttttt

• A Bundle is a special jar• Each bundle has a classloader• Bundles define

• required packages• provided packages

• Packages can be versioned

Bundle


TTTTTThhhhhheeeeee NaNaNaNaNaNarrrrrrrrrrrroooooowwwwww CCCCCCllllllaaaaaassssssssssssppppppaaaaaatttttthhhhhh

• Bundles wired together• Following a wire is quick• If an endpoint isn't there you

know about it!

DDDDDDeeeeeeccccccllllllaaaaaarrrrrreeeeeedddddd ppppppaaaaaacccccckkkkkkagagagagagageeeeee

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Useful library B

Useful library A

De c lar e d pac k ag e r e q u ir e m e n t

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Ourjar


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web app

Useful library A

Useful library B

common library v1

common library v2


AAAAAAnnnnnndddddd aaaaaatttttt rrrrrruuuuuunnnnnnttttttiiiiiimmmmmmeeeeee ..................

web app

Useful library A

Useful library B

common library v1

common library v2


OOOOOOSSSSSSGGGGGGiiiiii mmmmmmaaaaaakkkkkkeeeeeessssss rrrrrruuuuuunnnnnnttttttiiiiiimmmmmmeeeeee wwwwwwoooooorrrrrrkkkkkk lllllliiiiiikkkkkkeeeeee tttttthhhhhheeeeee bbbbbbuuuuuuiiiiiilllllldddddd ((((((kkkkkkiiiiiinnnnnndddddd ooooooffffff))))))

web app

Useful library B

common library v1

common library v2

Useful library A


EEEEEEAAAAAARRRRRRssssss aaaaaannnnnndddddd cccccclalalalalalassssssssssssppppppaaaaaatttttthhhhhhssssss• Run multiple apps on a server• Common libraries in each war

wwwwwweeeeeebbbbbbAAAAAA......wwwwwwaaaaaarrrrrrWEB-INF/classes/servletA.classWEB-INF/lib/a.jarWEB-INF/lib/b.jarWEB-INF/lib/junit.jar…

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wwwwwweeeeeebbbbbbAAAAAA......wwwwwwaaaaaarrrrrrWEB-INF/classes/servletA.class

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LLLLLLoooooooooooosssssseeeeee ccccccoooooouuuuuupppppplllllliiiiiinnnnnngggggg

• Modern enterprise architectures are all loosely coupled• In some way or another!

• JNDI• Web services• Dependency injection• OSGi services


OOOOOOSSSSSSGGGGGGiiiiii SSSSSSeeeeeerrrrrrvvvvvviiiiiicccccceeeeeessssss

• Services registered in Service Registry. • Services are dynamic

S


BBBBBBuuuuuutttttt ..................

• Historically OSGi and JEE have not played well together• Had to choose one and stick to it


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• Release date – 22 March 2010• The product of the OSGi Enterprise Expert Group (EEG)

• Brings popular Java EE technologies and OSGi together• Web Apps - Servlets + OSGi• JPA

• Adds Spring-derived component model and DI container• Blueprint


WWWWWWhhhhhhaaaaaatttttt ddddddooooooeeeeeessssss eeeeeennnnnntttttteeeeeerrrrrrpppppprrrrrriiiiiisssssseeeeee OOOOOOSSSSSSGGGGGGiiiiii ggggggiiiiiivvvvvveeeeee yyyyyyoooooouuuuuu??????

• Integrations for • Dependency injection (“blueprint”)• Dependency injection of OSGi services• JPA• JTA• JMX• JNDI

• Open source extensions include ...• Container-managed transactions• Application assembly• Application deployment

September 23rd 2010

BBBBBBlllllluuuuuueeeeeepppppprrrrrriiiiiinnnnnntttttt

public class Bean {

private LogService log;void setLog(LogService logService) {

log = logService;}

void process(Order o) {log.log(LOG_INFO, “processing: “ + o);}

}

<blueprint> <bean id=”shop” class=”org.example.ecomm.Bean”> <property name=”log”> <reference interface=”org.osgi.service.log.LogService”/> </property> </bean></blueprint>


OOOOOOppppppeeeeeennnnnn SSSSSSoooooouuuuuurrrrrrcccccceeeeee AAAAAAccccccttttttiiiiiivvvvvviiiiiittttttiiiiiieeeeeessssssApache “Aries” Projecthttp://incubator.apache.org/aries/• Implementations and extensions of Enterprise OSGi

specifications• Just completed 2nd release. • Project was 1 year old last week!

Eclipse “Gemini” Enterprise Modules Projecthttp://www.eclipse.org/gemini/• Modular implementations of Enterprise OSGi

specifications

http://incubator.apache.org/aries/

http://www.eclipse.org/gemini/


OOOOOOSSSSSSGGGGGGiiiiii AAAAAApppppppppppplllllliiiiiiccccccaaaaaattttttiiiiiioooooonnnnnn TTTTTToooooooooooolslslslslsls


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“I'm a great believer in luck and I find the harder I work, the more I have of it.”

■ Thomas Jefferson


DDDDDDeeeeeemmmmmmoooooo((((((mmmmmmaaaaaayyyyyybbbbbbeeeeee))))))


In the near future…all major Java

enterprise runtimes will support Apps

deployed as bundles


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osgi and the enterprise a match made in a box? · pdf fileseptember 23rd 2010 11 java vm log4j...

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