WAS별 Class Loading(Classloader) 순서

Tamcat 1.         1. Bootstrap classes of your JVM 2. System class loader classses (described above) 3. /WEB-INF/classes of your web application 4. /WEB-INF/lib/*.jar of your web application 5. $CATALINA_HOME/common/classes 6. $CATALINA_HOME/common/endorsed/*.jar 7. $CATALINA_HOME/common/lib/*.jar 8. $CATALINA_HOME/shared/classes 9. $CATALINA_HOME/shared/lib/*.jar   레진 1.         1. 레진 구동시 명령라인 classpath 2. resin/lib 디렉토리 3. 환경변수 classpath 4. 어플리케이션의 WEB-INF/lib와 WEB-INF/classes   웹로직 <DIV style="TEXT-ALIGN: center; CLEAR: both" class="imageblock center"> <IMG style="CURSOR: pointer" alt="" src="https://t1.daumcdn.net/cfile/tistory/146656154A166D4FC7" width=600 height=427 [안내]태그제한으로등록되지않습니다-xx[안내]태그제한으로등록되지않습니다-xxonclick="open_img('http://cfile25.uf.tistory.com/original/146656154A166D4FC7D714')"></DIV> <?xml:namespace prefix = v /><v:shapetype id=_x0000_t75 coordsize="21600,21600" o:spt="75" o:preferrelative="t" path="m@4@5l@4@11@9@11@9@5xe" filled="f" stroked="f"><v:stroke joinstyle="miter"></v:stroke><v:formulas><v:f eqn="if lineDrawn pixelLineWidth 0"></v:f><v:f eqn="sum @0 1 0"></v:f><v:f eqn="sum 0 0 @1"></v:f><v:f eqn="prod @2 1 2"></v:f><v:f eqn="prod @3 21600 pixelWidth"></v:f><v:f eqn="prod @3 21600 pixelHeight"></v:f><v:f eqn="sum @0 0 1"></v:f><v:f eqn="prod @6 1 2"></v:f><v:f eqn="prod @7 21600 pixelWidth"></v:f><v:f eqn="sum @8 21600 0"></v:f><v:f eqn="prod @7 21600 pixelHeight"></v:f><v:f eqn="sum @10 21600 0"></v:f></v:formulas><v:path o:extrusionok="f" gradientshapeok="t" o:connecttype="rect"></v:path><?xml:namespace prefix = o /><o:lock v:ext="edit" aspectratio="t"></o:lock></v:shapetype><v:shape style="WIDTH: 523.5pt; HEIGHT: 375pt; VISIBILITY: visible; mso-wrap-style: square" id=그림_x0020_1 type="#_x0000_t75" o:spid="_x0000_i1026" alt="http://i.blog.empas.com/inter999/2591494_698x500.jpg"><v:imagedata src="file:///C:\DOCUME~1\uxl21\LOCALS~1\Temp\msohtmlclip1\01\clip_image001.jpg" o:title="2591494_698x500"></v:imagedata></v:shape> 1.         1. WebApp 2. Ejb 3. App 4. WebLogicServer 5. SystemClassPath   오라클 OC4J <DIV style="TEXT-ALIGN: center; CLEAR: both" class="imageblock center"> <IMG alt="" src="https://t1.daumcdn.net/cfile/tistory/156656154A166D51C8" width=574 height=396></DIV> <v:shape style="WIDTH: 421.5pt; HEIGHT: 289.5pt; VISIBILITY: visible; mso-wrap-style: square" id=그림_x0020_2 type="#_x0000_t75" o:spid="_x0000_i1025" alt="http://i.blog.empas.com/inter999/2591495_562x386.jpg"><v:imagedata src="file:///C:\DOCUME~1\uxl21\LOCALS~1\Temp\msohtmlclip1\01\clip_image002.jpg" o:title="2591495_562x386"></v:imagedata></v:shape> 1.         1.Web-App 2. Global 3. System 4. BootStrap   TmaxSoft JEUS Web context class loader --> Web class loader --> JEUS root class loader EJB module class loader --> EJB class loader --> JEUS root class loader   위 클래스 로더 순서는 구조적인 측면이고 JEUS에서는 각 클래스 로더 간에 검색이 가능하다. 즉 구조적으로는 별도로 구성된 web context class loader 에서 EJB module class loader을 검색할수 있다는 이야기다. EJB을 개발 했을경우 Home, Remote클래스를 web context class loader 위치에 둘필요가 없어졌다.