DOI: /jos Tel/Fax: by Journal of Software. All rights reserved. , )

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1 ISSN , CODEN RUXUEW Journal of Software, Vol17, No5, May 2006, pp http//wwwjosorgcn DOI /jos Tel/Fax by Journal of Software All rights reserved J2EE Web, +,,, (, ) A Web Container Integration Framework in J2EE Application Servers LIN Bo, ZHOU Ming-Hui +, LIU Tian-Cheng, HUANG Gang, MEI Hong (Institute of Software, School of Electronics Engineering and Computer Science, Peking University, Beijing , China) + Corresponding author Phn , Fax , zhmh@seipkueducn, http//wwwseipkueducn Lin B, Zhou MH, Liu TC, Huang G, Mei H A Web container integration framework in J2EE application servers Journal of Software, 2006,17(5) http//wwwjosorgcn/ /17/1195htm Abstract Regarding the shortcomings found with the traditional method of integrating a J2EE (Java 2 platform enterprise edition) Web Container, a two-layered Web container integration framework is proposed the outer layer is independent of the Web container implementation and is the interface between the Web container and management tools, deployment tools and other modules; the inner layer is an extension to the Web container The framework has been implemented on the J2EE application server PKUAS (Peking University Application Server) Test results have shown that this framework can satisfy the design goals of a pluggable, unified configurable Web container, and its performance is satisfactory Key words J2EE application server; Web container; integration framework J2EE(Java 2 platform enterprise edition) Web, Web Web, Web ; Web J2EE PKUAS(Peking University Application Server),, J2EE ;Web ; TP393 A J2EE(Java 2 platform enterprise edition) [1] Sun 1999 Java, J2EE, Web 2005 Supported by the National Natural Science Foundation of China under Grant Nos , , ( ); the National High-Tech Research and Development Plan of China under Grant Nos2005AA112030, 2005AA ( (863)); the National Grand Fundamental Research 973 Program of China under Grant No2002CB ( (973)) Received ; Accepted

2 1196 Journal of Software Vol17, No5, May 2006 J2EE ( 1 ), Web EJB J2EE J2EE, J2EE, Internet,Web Web, Web, EJB, EJB Web Servlet/JSP [2], Web (Servlet JSP(JavaServer Pages)) Servlet/JSP, J2EE,,Web J2EE ( Web Web ), Tomcat,Jetty Web, Web J2EE Applet container Web container EJB container Applet J2SE Application client container Application Client J2EE services J2SE Interoperability JSP Servlet J2EE services Transaction Security Concurrency Persistence J2SE Interoperability Transaction EJB J2EE services Security Concurrency Persistence J2SE Data Access Legacy Integration Legacy System Database Presentation tier Business tier Data tier Fig1 J2EE architecture 1 J2EE,,,, Web,,, Web Web, Web, Web Web, [3], Web Servlet/JSP, Web,, Web, Web, Web,, J2EE Web, PKUAS(Peking university application server) 1 Web 2 Web 3 J2EE PKUAS, 4,

3 J2EE Web Web 11 Web, Web,,, ;Web, Web Web Web, Tomcat Apache Tomcat [4] Servlet/JSP, Web,Tomcat, 2 Web, Server Server Tomcat Web Server Service,Server port, 1 shutdown, ;, Service Service Container ( Engine ) Connector Container Service Connector Service Connector Connector Web Connector Service Java Service, Java, Server Fig2 Inner structure of Tomcat 2 Tomcat ConnectorConnector, Connector, Request Response, Container, Container invoke, Request Response, EngineEngine Container, Servlet,Engine Container,, setparent() IllegalArgumentException Engine Container Host HostHost Tomcat Web Host, Host Host Container Context Context Context Web Web Servlet JSP Jar Context Container Wrapper

4 1198 Journal of Software Vol17, No5, May Jetty Jetty Mort Bay Consulting Java Web [5] Jetty Mort Bay Greg Wilkin Java, 10,Jetty Tomcat,Jetty, Tomcat,,Jetty, Jetty, HttpServer Web ; HttpListener, Tomcat Connector; HttpContext Web 2 Web, 1 Web, Web, Web, Web, ;, Web Web Web,,, Web 21 Web, Web, 2 (,Web ) Web, Web, Web Web, Web ; Web,, Web, Web, J2EE application server Inner layer Outer layer Inner container manager Container manager Outer container manager Other modules Web container implementation Inner virtual host Virtual host Outer virtual host Other modules Inner application Application Outer application Other modules Fig3 Web container integration framework architecture 3 Web Web, 3

5 J2EE Web , 3 3, 3, Web 3 Web, Web Web (HTTP,HTTPS,AJP ), Web,, Web, ( ) Web, 221 Web ( 3 ) Web 3, 3, Web Web, Web (1) WebController,, Web Web, ; (2) VirtualHost, Web, Web ; (3) VirtualApp, Web,, 3 Web, Web Web, Web 222 Web Web, Web,, (1) Web,, Java Management Beans (Java management extensions [6] ),Web MBeans ; (2), Web Web, Web

6 1200 Journal of Software Vol17, No5, May PKUAS PKUAS Apache Tomcat Jetty, 311 PKUAS PKUAS [7], J2EE13 EJB20 [1] PKUAS, PKUAS, ( ),, PKUAS JMX 312 PKUAS JMX, 3 3 Mbean MBean ; Mbean 3 WebContainerMBean sethttpport,findhost,removehost,addhost; VirtualHostMBean findapp,deploy,undeploy; ApplicationMBean getcontextpath,getlocalpath 3, Web PKUAS servicesconf, SERVICE CLASS= pkuaswebtomcat4webcontainer ATTRIBUTE NAME= HttpPort VALUE= 8080 / Deployer NAME= Host ATTRIBUTE Name= appbase Value= application / Application localdir= contextpath= / /Deployer /SERVICE Web, SERVICE CLASS Web, Web,PKUAS [8] Web, 4 Fig4 Management tool 4

7 J2EE Web , Tomcat,Server Service, Web,, Web,, Tomcat, 2 PKUAS Tomcat 3 WebContainer Tomcat Engine ; VirtualHost Tomcat Host ; Application Tomcat Context 1 Tomcat,PKUAS Jetty [9] Tomcat 2 Jetty Table 1 Outer entity methods and the corresponding methods provided by Tomcat 1 Tomcat WebContainer SetHttpPort findhost removehost addhost ConnectorsetContainer EnginefindChild EngineremoveChild EngineaddChild VirtualHost findapp deploy undeploy HostfindChild Hostinstall HostremoveChild VirtualApp getcontextpath getlocalpath ContextgetPath ContextgetDocBase Table 2 Outer entities and their corresponding Jetty classes 2 Jetty WebContainer VirtualHost VirtualApp HttpServer Does not correspond to any specific class, instead its functions are mapped to HttpServlet and HttpContext, respectively HttpContext PKUAS Tomcat Jetty Web, 32 Web,Web, Web Web, Web Web Web, Web ;,Web J2EE, Web, Web,, SOAP(simple object access protocol) Orientware XLinker [9] TestEcho TestEcho Web Service, add echo; Web, J2EE, Tomcat PKUAS Tomcat 3 4

8 1202 Journal of Software Vol17, No5, May 2006 Table 3 Test results on PKUAS 3 PKUAS Test name Run count Failure count Min response time (ms) Avg response time (ms) Max response time (ms) add(int,int) echo(string) Table 4 Test results on Tomcat 4 Tomcat Test name Run count Failure count Min response time (ms) Avg response time (ms) Max response time (ms) add(int,int) echo(string) , Web,, PKUAS Web, Web Web, Web,,, 4, J2EE BEA WebLogic,IBM WebSphere ; JBoss Web, Web, Web, JBoss, J2EE JBoss Web Web Tomcat Jetty,,JBoss Web JBoss,JBoss, Web Web 5 J2EE Web, J2EE Web, Web Apache Tomcat Jetty, J2EE PKUAS,, Web,,Web Web,, References [1] SUN Microsystems Java 2 platform enterprise edition specification Version [2] SUN Microsystems Java servlet specification Version http//jcporg/en/jsr/detail?id=154 [3] SUN Microsystems Java 2 platform enterprise edition management specification (JSR-77) 2002 http//jcporg/jsr/detail/77jsp [4] Apache Foundations The apache tomcat project 2006 http//jakartaapacheorg/tomcat/ [5] Consulting M Jetty Java Servlet Server 2006 http//jettymortbayorg/jetty/indexhtml [6] SUN Microsystems Java management extensions (JMX) JSR http//jcporg/en/jsr/detail?id=3

9 J2EE Web 1203 [7] Huang G, Wang QX, Cao DG, Mei H PKUAS A domain-oriented component operating platform ACTA ELECTRONICA SINICA, 2002,30(12A)39 43 (in Chinese with English abstract) [8] Wang D Design and implementation of the management framework in PKUAS [MS Thesis] Beijing Peking University, 2004 (in Chinese with English abstract) [9] Ge S, Hu CM, Du ZX, Wang Y, Lin XL, Huai JP A Web service-based application supporting environment In Proc of the National Software and Application (in Chinese with English abstract) [7],, PKUAS,2002,30(12A)39 43 [8] PKUAS [ ],2004 [9],,,, Web Service (1983 ),,, (1975 ),,,, (1974 ),,,,,, (1963 ),,,,,CCF,,, (1978 ),,,,