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Using Open EJB. --Use Tomcat, openejb, SSL and JSP to Implement an Inventory Query System Hongfang Shen Praveen Mynam Gaurav Kochhar Bhandari, Arathi. Open EJB.

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Using open ejb l.jpg

Using Open EJB

--Use Tomcat, openejb, SSL and JSP

to Implement an Inventory Query System

Hongfang Shen

Praveen Mynam

Gaurav Kochhar

Bhandari, Arathi

Open ejb l.jpg
Open EJB

  • OpenEJB is an open source EJB container that you can download for free. All you need is OpenEJB to run Enterprise JavaBeans. The OpenEJB web site has a detailed “Hello World” tutorial that works with a local or remote server.

  • The OpenEJB web site also provides detailed instructions on how to install OpenEJB on a Tomcat server. Tomcat is a servlet container and does not host EJB components. OpenEJB allows you to add EJB components to Tomcat servlets and Java Server Pages.

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Open EJB

  • The OpenEJB site provides a “Hello World” servlet example called and a “Hello World” Java Server Page example called openejb.jsp. Click on Tomcat under Servers on the OpenEJB web site and follow links.

  • Once you are comfortable with using EJBs with Tomcat, I recommend learning how the javax.ejb package interfaces and exception classes work through examples on the internet. The javax.ejb package can be found in the J2EE 1.4 API.

  • Here is the link to OpenEJB.

Introduction l.jpg

First Tier


AFS11 (Tomcat+openejb+SSL)

Second Tier




Third Tier


System architecture

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Introduction (cont.)

  • Highlights--Security

  • Digital Certificate

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Introduction (cont.)

  • Highlights--Security

  • Identity authentication

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Introduction (cont.)

Highlights—Search Engine

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System Design

  • Client/Server

    • Server side uses Tomcat +SSL+OpenEJB. The business logic is implemented in JSP and Enterprise JavaBeans.

    • Client side is a standard web browser.

  •  Two Enterprise JavaBeans

    • search engine Enterprise JavaBean--takes product name as parameter and search the inventory database and return the search result.

    • authentication bean--takes the users’ ID and password as parameters, and compare the message digest of the password with the digest stored in the database.

  •  Integration

    • The two Enterprise JavaBeans integrated with Java Server Pages (JSP) to implement the business logic.

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Steps to config Tomcat/OpenEJB

  • Install Tomcat (see related class presentation)

  • Install OpenEJB

    • Step1: download

    • Step2: unzip to $HOME

      a new directory openejb-0.9.2 will be created

    • Step3: add environment variable to .login script file.

      setenv OPENEJB_HOME $HOME/ openejb-0.9.2

    • Step4: make files under the bin directory executable.

      chmod a+x $OPENEJB_HOME/bin/*

      chmod a+x $OPENEJB_HOME/

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Steps to config Tomcat/OpenEJB(cont.)

  • Config Tomcat to Support OpenEJB

    • copy openejb class loader to $TOMCAT_HOME/webapps folder

      cp $OPENEJB_HOME/dist/openejb_loader-0.9.2.war $TOMCAT_HOME/webapps

    • modify the config file of openejb class loader to specify openejb home folder.

      (1) Start the Tomcat server using the following command:

      $TOMCAT_HOME/bin/ run

      (2) a new folder openejb-loader-0.9.2 will be created under


      (3)modify the config file—web.xml under the new folder and change the value of parameter openejb.home to the openejb home folder (the value of $OPENEJB_HOME variable).

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Steps to config Tomcat/OpenEJB(cont.)

  • Config Tomcat to Support SSL

    Step 1: set JSSE_HOME environment variable.

    setenv JSSE_HOME $JAVA_HOME/jre 

    Step 2: create a certificate

    $JAVA_HOME/bin/keytool –genkey –alias tomcat –keyalg RSA

    System will ask you several questions. After answering all these questions, a .keystore file

    will be generated.

    Step 3: modify TOMCAT config file to support SSL.

    Modify the server.xml file under TOMCAT_HOME/conf folder, uncomment the SSL

    section. Then change the port number to the number you desire. Finally, add the

    following content into the server.xml SSL section.

    <Factory className="org.apache.coyote.tomcat4.CoyoteServerSocketFactory"

    clientAuth="false" protocol="TLS"

    keystoreFile="/afs/" />

    Note: the keystoreFile is the location where your .keystore stored.

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Steps to config Tomcat/OpenEJB(cont.)

  • start and stop Tomcat and OpenEJB.

  • $TOMCAT_HOME/bin/ run

  • $TOMCAT_HOME/bin/ stop

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Implement Business Logic

  • Implement Enterprise JavaBeans

  • write password authentication Enterprise JavaBean

    • (1) 

    • (2)

    • (3)

  • write inventory search Enterprise JavaBean

    • (1)

    • (2)

    • (3)

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Implement Business Logic (cont.)

  • Register and Deploy Enterprise JavaBeans

    • First, create a bean descriptor file to describe your beans;

    • Second,package your bean into a .jar file.

    • Next, deploy the EJB beans into Openejb.

    • Finally, register the EJB beans in Tomcat config file so that Servlet or JSP in Tomcat can use it.

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Implement Business Logic (cont.)

  • Password EJB bean descriptor file under META-INF folder -- ejb-jar.xml

    <?xml version="1.0" encoding="UTF-8"?>










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Implement Business Logic (cont.)













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Implement Business Logic (cont.)

  • package the EJB bean:

    Jar cvf myPasswordEJB.jar cis604 META-INF

  • deploy the bean:

    $OPENEJB_HOME/ deploy –a –f –c $HOME/ myPasswordEJB.jar

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Implement Business Logic (cont.)

  • Register the EJB beans in Tomcat server, adding to examples context section of $TOMCAT_HOME/conf/server.xml.

    <Ejb name="ejb/password"




    <ResourceParams name="ejb/password">





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Implement Business Logic (cont.)









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Implement Business Logic (cont.)














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Implement Business Logic (cont.)

  • write Java Server Pages and interface html files

    (1)   login.htm

    (2)   create_new.jsp

    (3)   search_byname.jsp

    (4)   searchejb.jsp