Mapping Entity Beans to physical DB schemas

Does any one have any idea whether sun application server(PE) supports mapping an entity bean to a table in a schema in a database, when using CMP
eg
something like insert into schema_name.table_name

Thanks ian, what you say is completely true. However if you have a database with multiple schemas and then you use the capture-schema utility to obtain a perticular schema(For example say abc). Then you deploy the entity beans on the application server. The entity beans use a connection pool which logs in as 'system' to the database.
In this case since i use a captured schema the application server does not create the tables.Since the application server does not reffer to scehma 'abc' on it's insert statement the sql fails (we are logged in as system, so the default schema is system). It is possible to create and use a user 'abc' for schema 'abc', bu this means creating seperate database users for each schema and creating sepperate connection pools for each schema.
Is there any way we can indicate to the application server during deployement to use a specific table from a specific schema(Physical DB schema). I can specify to use a table from captured schema, but in order for this to work the application server needs to be logged on to the database as that schema's defualt user.
-Kusan Atukorala

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  • Problem in creating CMP Entity Bean - Pls Help

    I am trying to build one simple project having jsps to get connected to CMP Entity Bean.
    But while deploying I am getting the following error...
    Nov 15, 2004 10:59:09... Info: End of log messages of the target system.
    Nov 15, 2004 10:59:09... Info: ***** End of SAP J2EE Engine Deployment (J2EE Application) *****
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    Reason: Complex error : server ID 6155350:Application bcone.com/EntityCMPAppln cannot be started, because it has hard reference to resource CONFIG_DB with type javax.sql.DataSource, but it is not active on the server.
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    Nov 15, 2004 10:59:09... Info: SDM configuration: Do not automatically start/stop J2EE Engine. Do not restore state of J2EE Engine now.
    Nov 15, 2004 10:59:09... Error: -
    At least one of the Deployments failed -
    Nov 15, 2004 11:05:16... Info: Request for Logon as admin accepted
    ===========================================
    Nov 15, 2004 11:05:08... Info: =   Starting to execute command 'remotegui'   =
    Nov 15, 2004 11:05:08... Info: ===============================================
    Nov 15, 2004 11:05:10... Info: SDM started successfully.
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    Regards,
    Vivek Ojha

    Dear Benny,
    The code of the required files is pasted below....
    Application.XML
    <?xml version="1.0" encoding="UTF-8"?>
    <!DOCTYPE application PUBLIC "-//Sun Microsystems, Inc.//DTD J2EE Application 1.3//EN"
                                 "http://java.sun.com/dtd/application_1_3.dtd">
    <application>
        <display-name>EntityCMPAppln</display-name>
        <description>EAR description</description>
        <module>
            <ejb>EntityCMPEjb.jar</ejb>
        </module>
        <module>
            <web>
                <web-uri>EntityCMPWeb.war</web-uri>
                <context-root>/student</context-root>
            </web>
        </module>
    </application>
    Application-j2ee-engine.xml
    <?xml version="1.0" encoding="UTF-8"?>
    <!DOCTYPE application-j2ee-engine SYSTEM "application-j2ee-engine.dtd">
    <application-j2ee-engine>
         <provider-name>bcone.com</provider-name>
         <fail-over-enable
              mode="disable"/>
    </application-j2ee-engine>
    data-source-aliases.xml
    <?xml version="1.0" encoding="UTF-8"?>
    <!DOCTYPE data-source-aliases SYSTEM "data-source-aliases.dtd">
    <data-source-aliases>
         <aliases>
              <data-source-name>${com.sap.datasource.default}</data-source-name>
              <alias>STUDENTDB</alias>
         </aliases>
    </data-source-aliases>
    ejb-j2ee-engine.xml
    <?xml version="1.0" encoding="UTF-8"?>
    <!DOCTYPE ejb-j2ee-engine SYSTEM "ejb-j2ee-engine.dtd">
    <ejb-j2ee-engine>
         <enterprise-beans>
              <enterprise-bean>
                   <ejb-name>StudentBean</ejb-name>
                   <resource-ref>
                        <res-ref-name>jdbc/STUDENTDB</res-ref-name>
                        <res-link>STUDENTDB</res-link>
                   </resource-ref>
                   <entity-props/>
              </enterprise-bean>
         </enterprise-beans>
    </ejb-j2ee-engine>
    ejb-jar.xml
    <?xml version="1.0" encoding="UTF-8"?>
    <!DOCTYPE ejb-jar PUBLIC "-//Sun Microsystems, Inc.//DTD Enterprise JavaBeans 2.0//EN" "http://java.sun.com/dtd/ejb-jar_2_0.dtd">
    <ejb-jar>
         <description>EJB JAR description</description>
         <display-name>EJB JAR</display-name>
         <enterprise-beans>
              <entity>
                   <ejb-name>StudentBean</ejb-name>
                   <home>com.bcone.ejb.StudentHome</home>
                   <remote>com.bcone.ejb.Student</remote>
                   <ejb-class>com.bcone.ejb.StudentBean</ejb-class>
                   <persistence-type>Container</persistence-type>
                   <prim-key-class>java.lang.String</prim-key-class>
                   <reentrant>False</reentrant>
                   <cmp-version>2.x</cmp-version>
                   <abstract-schema-name>StudentBean</abstract-schema-name>
                   <cmp-field>
                        <field-name>studentId</field-name>
                   </cmp-field>
                   <cmp-field>
                        <field-name>lname</field-name>
                   </cmp-field>
                   <cmp-field>
                        <field-name>standard</field-name>
                   </cmp-field>
                   <cmp-field>
                        <field-name>fyear</field-name>
                   </cmp-field>
                   <cmp-field>
                        <field-name>fname</field-name>
                   </cmp-field>
                   <primkey-field>studentId</primkey-field>
                   <resource-ref>
                        <res-ref-name>jdbc/STUDENTDB</res-ref-name>
                        <res-type>javax.sql.DataSource</res-type>
                        <res-auth>Container</res-auth>
                   </resource-ref>
              </entity>
         </enterprise-beans>
    </ejb-jar>
    persistent.xml
    <?xml version="1.0" encoding="UTF-8"?>
    <!DOCTYPE persistent-ejb-map SYSTEM "persistent.dtd">
    <persistent-ejb-map>
         <locking
              type="Table"/>
         <db-properties>
              <data-source-name>CONFIG_DB</data-source-name>
              <database-vendor
                   name="SAPDB"/>
         </db-properties>
         <entity-beans>
              <entity-bean>
                   <ejb-name>StudentBean</ejb-name>
                   <table-name>TMP_STUDENTNEW</table-name>
                   <field-map
                        key-type="PrimaryKey">
                        <field-name>studentId</field-name>
                        <column>
                             <column-name>STUDENTID</column-name>
                        </column>
                   </field-map>
                   <field-map
                        key-type="NoKey">
                        <field-name>lname</field-name>
                        <column>
                             <column-name>LNAME</column-name>
                        </column>
                   </field-map>
                   <field-map
                        key-type="NoKey">
                        <field-name>standard</field-name>
                        <column>
                             <column-name>STANDARD</column-name>
                        </column>
                   </field-map>
                   <field-map
                        key-type="NoKey">
                        <field-name>fyear</field-name>
                        <column>
                             <column-name>FYEAR</column-name>
                        </column>
                   </field-map>
                   <field-map
                        key-type="NoKey">
                        <field-name>fname</field-name>
                        <column>
                             <column-name>FNAME</column-name>
                        </column>
                   </field-map>
              </entity-bean>
         </entity-beans>
         <relationships/>
    </persistent-ejb-map>
    StudentBean.java
    package com.bcone.ejb;
    import javax.ejb.EntityBean;
    import javax.ejb.EntityContext;
    import javax.ejb.RemoveException;
    import javax.ejb.CreateException;
    @abstractSchemaName StudentBean
    @cmpVersion 2.x
    @ejbHome <{com.bcone.ejb.StudentHome}>
    @ejbPrimaryKey <{java.lang.String}>
    @ejbRemote <{com.bcone.ejb.Student}>
    @hasSimplePK true
    public abstract class StudentBean implements EntityBean {
         public void ejbLoad() {
         public void ejbStore() {
         public void ejbRemove() throws RemoveException {
         public void ejbActivate() {
         public void ejbPassivate() {
         public void setEntityContext(EntityContext context) {
              myContext = context;
         public void unsetEntityContext() {
              myContext = null;
         private EntityContext myContext;
    @primKeyField
         public abstract String getStudentId();
         public abstract void setStudentId(String studentId);
         public abstract String getLname();
         public abstract void setLname(String lname);
         public abstract String getFname();
         public abstract void setFname(String fname);
         public abstract String getStandard();
         public abstract void setStandard(String standard);
         public abstract String getFyear();
         public abstract void setFyear(String fyear);
    Create Method.
         public String ejbCreate(
              String studentId,
              String fname,
              String lname,
              String standard,
              String fyear)
              throws CreateException {
              setStudentId(studentId);
              setFname(fname);
              setLname(lname);
              setStandard(standard);
              setFyear(fyear);
              return null;
    Post Create Method.
         public void ejbPostCreate(
              String studentId,
              String fname,
              String lname,
              String standard,
              String fyear) {
              // TODO : Implement
    StudentData.java
    Created on Nov 14, 2004
    To change the template for this generated file go to
    Window&gt;Preferences&gt;Java&gt;Code Generation&gt;Code and Comments
    package com.bcone.data;
    @author Administrator
    To change the template for this generated type comment go to
    Window&gt;Preferences&gt;Java&gt;Code Generation&gt;Code and Comments
    public class StudentData {
         private String studentId;
         private String fname;
         private String lname;
         private String standard;
         private String fyear;
    @return
         public String getFname() {
              return fname;
    @return
         public String getFyear() {
              return fyear;
    @return
         public String getLname() {
              return lname;
    @return
         public String getStandard() {
              return standard;
    @return
         public String getStudentId() {
              return studentId;
    @param string
         public void setFname(String string) {
              fname = string;
    @param string
         public void setFyear(String string) {
              fyear = string;
    @param string
         public void setLname(String string) {
              lname = string;
    @param string
         public void setStandard(String string) {
              standard = string;
    @param string
         public void setStudentId(String string) {
              studentId = string;
    student.jsp
    <%@ page language="java" %>
    <html>
         <head>
              <title>
                   Title
              </title>
         </head>
         <body>
              <form method="POST" action="WEBBOT-SELF" name="Student" onSubmit="">
      <!--webbot bot="SaveResults" startspan U-File="_private/form_results.txt"
      S-Format="TEXT/CSV" S-Label-Fields="TRUE" ><input TYPE="hidden" NAME="VTI-GROUP" VALUE="0"><!webbot
      bot="SaveResults" endspan -->
      <br>
      <a href="/student/manageStudent.jsp?action=add" method="post"> Create </a>   
      <a href="/student/manageStudent.jsp?action=modify" method="post"> Modify </a>   
      <a href="/student/manageStudent.jsp?action=delete" method="post"> Delete </a>
      <br><br>
      <table border="1" width="32%">
        <tr>
          <td width="39%">Student ID </td>
          <td width="61%"><input type="text" name="studentId" size="20"></td>
        </tr>
        <tr>
          <td width="39%">First Name</td>
          <td width="61%"><input type="text" name="fname" size="20"></td>
        </tr>
        <tr>
          <td width="39%">Last Name</td>
          <td width="61%"><input type="text" name="lname" size="20"></td>
        </tr>
        <tr>
          <td width="39%">Standard</td>
          <td width="61%"><input type="text" name="standard" size="20"></td>
        </tr>
        <tr>
          <td width="39%">Fiscal Year</td>
          <td width="61%"><input type="text" name="fyear" size="20"></td>
        </tr>
        <tr>
          <td width="39%" align="center"><input type="submit" value="Submit" name="submit"></td>
          <td width="61%" align="center"><input type="reset" value="Reset" name="reset"></td>
        </tr>
      </table>
    </form>
         </body>
    </html>
    mamageStudent.jsp
    <%@ page language="java"
    import="javax.naming.,java.sql.,javax.sql,com.bcone.ejb."
    %>
    <html>
         <head>
              <title>
                   Manage Student
              </title>
         </head>
         <body>
              <h1>
              </h1>
    <jsp:useBean id="stu" class="com.bcone.data.StudentData" ></jsp:useBean>
    <jsp:setProperty name="stu" property="*" />
    <%
    try {
         InitialContext ctx = new InitialContext();
         StudentHome home = (StudentHome) ctx.lookup("java:comp/env/StudentBean");
         String str = request.getParameter("action");
         if("action".equals(str)) {
              Student rem = home.create(remote.setFname(stu.getStudentId(),stu.getFname(),stu.getLname(),stu.getStandard(),stu.getFyear());
              out.println(stu.getStudentId() + "Student Created");
         } else if ("modify".equals(str)) {
              Student remote  = home.findByPrimaryKey(stu.getStudentId());
              remote.setFname(stu.getFname());
              remote.setFname(stu.getLname());
              remote.setFname(stu.getStandard());
              remote.setFname(stu.getFyear());
              out.println(stu.getStudentId() + "Student modified");
         } else if ("delete".equals(str)) {
              Student stu1  = home.findByPrimaryKey(stu.getStudentId());
              stu1.remove();
              out.println(stu.getStudentId() + "Student deleted");
    } catch (Exception e) {
         out.println("Exception e"+e.toString());
    %>
         </body>
    </html>
    Regards,
    Vivek Ojha

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    Do let us know if you come up with the solution.
    Regards,
    Harish
    Message was edited by: HARISH SUBRAMANIAN

  • Entity bean mapping to multiple tables.

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  • CMP Entity Bean with ejb-ql finder methods and INFORMIX database

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    <abstract-schema-name>EmpBean</abstract-schema-name>
    <cmp-field>
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    <cmp-field>
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    <cmp-field>
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    <cmp-field>
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    <type-storage>meta-inf/weblogic-cmp-rdbms-jar.xml</type-storage>
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    <local-jndi-name>ejb/EmpBean</local-jndi-name>
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    weblogic-cmp-rdbms-jar.xml
    ====================
    <weblogic-rdbms-bean>
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    <field-map>
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    <dbms-column>first_namel</dbms-column>
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    <field-map>
    <cmp-field>lastName</cmp-field>
    <dbms-column>last_name</dbms-column>
    </field-map>
    <field-map>
    <cmp-field>phone</cmp-field>
    <dbms-column>phone</dbms-column>
    </field-map>
    <field-map>
    <cmp-field>address</cmp-field>
    <dbms-column>address</dbms-column>
    </field-map>
    </table-map>
    <weblogic-rdbms-bean>
    Please ignore any typos that you may notice in above sample descriptions (because I just typed it here changing original names).
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    Edited by: 839281 on Feb 25, 2011 10:55 AM
    Edited by: venkatp on Mar 1, 2011 9:31 AM

  • Entity beans - Deployement tool

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    5. The user can also assign customers to a specific role in an order-process. On the other hand, each customer can make many orders.
    So, we have a n:m relation here with the db-tables Customer, Order, OrderCustomer.
    6. A complex search functionality has to be implemented, where the db-query is created dynamically at runtime.
    7. The application is a multi-user application (about 10 users). It will be very rare, that users will work on the same data at the same time, but it might happen.
    8. The database type (SAP DB) will not be changed in the near future.
    With these 8 requirements in mind, I dealed a lot with EntityBeans, Hibernate and JDBC with SesseionBeans during the last 2 weeks.
    Until now, I came to the following conclusions.
    Hibernate is too slow. That'S bad, for data is edited very often and sometimes I want to edit just a single cell in 1000-row table.
    Hibernate's biggest advantage - that it makes your application independent of the database type - is not even required (see point 8).
    JDBC with SessioBeans: Very fast (I tried a simple query and it was about 10 times faster than Hibernate).
    The disadvantage is, that I have to take care about all the transaction, concurrency control etc. things.
    If I use JDBC, I want to do it that way: A SessionFacade accesses a DAO-object which executes the DB-query and returns the result to the SessionFacade which in the last step will pass the result to the client.
    Entity Beans: I am completely confused with Entity Beans.
    I read a lot about the CompositeEntity-Pattern for BMP. But on sun's J2EE Pattern page (http://java.sun.com/blueprints/corej2eepatterns/Patterns/CompositeEntity.html)
    they said, that it's just useful when using the EJB 1.1 specification, because from EJB 2.0. the container or whatever will take care about lazy loading and store optimization.
    So, from EJB 2.0. you should prefer using CMP-Beans with Container Managed Relationships (CMR), but as I heard, the dependent objects cannot be accessed and changed by the client when using CMPBeans with CMR.
    However, a simple DB/Entity-mapping will not work in my case, because as mentioned above, there are thousands of products from the db to be managed at the same time. So here, I thought, the Composite pattern with its lazy loading strategy would be useful.
    Furthermore, I have an n:m relationship in my database scheme, which is not trivial to map to entity beans. And don't forget that some related data is spread over 2 databse tables.
    To sum it up, it would be very nice if some of you could clarify this perisistence nightmare, especially some clarification about if and how to use EntityBeans when having n:m relationships, editing data a lot, managing lots of table rows at once and having related data distributed over 2 database tables.
    So, which technology would you prefer with the 8 requirements in mind? Hibernate, Entity Beans or JDBC with SessionBeans? Or would you prefer a mixed solution?
    Thanx for every hint.
    Regards,
    egon

    Here the requested information about the test:
    Goal:
    Find all customers, who's branches have the String "Branch" in their name.
    Both times, a simple client accesses the same SessionBean in a JBOSS-Container.
    This Bean has 2 methods. One accesses the DB via Hibernate (executeCriteria), the other one via JDBC (executeCriteriaJDBC).
    The code to count the seconds of computation is as follows:
    long startTime = System.currentTimeMillis();
    List customerList = bean.executeCriteria(dc);
    System.out.println("Hibernate: "+((System.currentTimeMillis()-startTime)/1000.0f)+" sek");
    startTime = System.currentTimeMillis();
    List customerListJDBC = bean.executeCriteriaJDBC(query);
    System.out.println("JDBC: "+((System.currentTimeMillis()-startTime)/1000.0f)+" sek");
    HIBERNATE:
    CODE:
    Branch Branch = new Branch();
    Branch.setName("%Branch%");
    Example example = Example.create(Branch);     
    DetachedCriteria dc = DetachedCriteria.forClass(Customer.class)
    .createCriteria("branches").add(example.enableLike()).setResultTransformer(Criteria.DISTINCT_ROOT_ENTITY);
    QUERY:
    select
            this_.UUID as UUID1_1_,
            this_.NAME as NAME1_1_,
            this_.CUSTOMERNO as CUSTOMERNO1_1_,
            this_.SHORTDESC as SHORTDESC1_1_,
            this_.LONGDESC as LONGDESC1_1_,
            this_.TAXNUMBER as TAXNUMBER1_1_,
            this_.SALESTAXID as SALESTAXID1_1_,
            this_.ACCOUNTHOLDER as ACCOUNTH8_1_1_,
            this_.BANKACCOUNT as BANKACCO9_1_1_,
            this_.BANKCODE as BANKCODE1_1_,
            this_.BANKNAME as BANKNAME1_1_,
            this_.AREA1TEXT as AREA12_1_1_,
            this_.AREA2TEXT as AREA13_1_1_,
            this_.AREA3TEXT as AREA14_1_1_,
            this_.AREA4TEXT as AREA15_1_1_,
            this_.AREA5TEXT as AREA16_1_1_,
            this_.CH_UUID as CH17_1_1_,
            this_.REFTEXT1 as REFTEXT18_1_1_,
            this_.REFTEXT2 as REFTEXT19_1_1_,
            this_.REFTEXT3 as REFTEXT20_1_1_,
            branch1_.UUID as UUID0_0_,
            branch1_.NAME as NAME0_0_,
            branch1_.ILN as ILN0_0_,
            branch1_.BRANCHID as BRANCHID0_0_,
            branch1_.SHORTDESC as SHORTDESC0_0_,
            branch1_.LONGDESC as LONGDESC0_0_,
            branch1_.BAGSRECEIVED as BAGSRECE7_0_0_,
            branch1_.CUSTOMER_UUID as CUSTOMER8_0_0_
        from
            CUSTOMER this_,
            BRANCH branch1_
        where
            this_.UUID=branch1_.CUSTOMER_UUID
            and (
                branch1_.NAME like ?
    RESULT:
    Customername: Customer_A
    Customername: Customer_F
    Customername: Customer_D
    Customername: Customer_R
    Customername: Customer_S
    TIME:
    Hibernate: 1.343 sek
    JDBC:
    QUERY:
    Select distinct c.* from Customer c, Branch b where b.id=b.Customer_id and b.name like '%Branch%'
    // After getting the result of the query: Create a list of Customer-objects. Set all attributes of each Customer-object.
    RESULT:
    Customername: Customer_R
    Customername: Customer_A
    Customername: Customer_S
    Customername: Customer_D
    Customername: Customer_F
    TIME:
    JDBC: 0.125 sek
    The Customer.hbm.xml (auto-generated in Eclipse with Middlegen)
    <?xml version="1.0"?>
    <!DOCTYPE hibernate-mapping PUBLIC
        "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
        "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd" >
    <hibernate-mapping>
    <!--
        Created by the Middlegen Hibernate plugin 2.2
        http://boss.bekk.no/boss/middlegen/
        http://www.hibernate.org/
    -->
    <class
        name="hibernate.hibernate.Customer"
        table="CUSTOMER"
        lazy="false"
    >
        <id
            name="uuid"
            type="java.lang.String"
            column="UUID"
        >
            <generator class="assigned" />
        </id>
        <property
            name="name"
            type="java.lang.String"
            column="NAME"
            length="100"
        />
        <property
            name="customerno"
            type="java.lang.Integer"
            column="CUSTOMERNO"
            length="5"
        />
        <property
            name="shortdesc"
            type="java.lang.String"
            column="SHORTDESC"
            length="50"
        />
        <property
            name="longdesc"
            type="java.lang.String"
            column="LONGDESC"
            length="100"
        />
        <property
            name="taxnumber"
            type="java.lang.String"
            column="TAXNUMBER"
            length="50"
        />
        <property
            name="salestaxid"
            type="java.lang.String"
            column="SALESTAXID"
            length="50"
        />
        <property
            name="accountholder"
            type="java.lang.String"
            column="ACCOUNTHOLDER"
            length="50"
        />
        <property
            name="bankaccount"
            type="java.lang.String"
            column="BANKACCOUNT"
            length="50"
        />
        <property
            name="bankcode"
            type="java.lang.String"
            column="BANKCODE"
            length="50"
        />
        <property
            name="bankname"
            type="java.lang.String"
            column="BANKNAME"
            length="50"
        />
        <property
            name="area1text"
            type="java.lang.String"
            column="AREA1TEXT"
            length="50"
        />
        <property
            name="area2text"
            type="java.lang.String"
            column="AREA2TEXT"
            length="50"
        />
        <property
            name="area3text"
            type="java.lang.String"
            column="AREA3TEXT"
            length="50"
        />
        <property
            name="area4text"
            type="java.lang.String"
            column="AREA4TEXT"
            length="50"
        />
        <property
            name="area5text"
            type="java.lang.String"
            column="AREA5TEXT"
            length="50"
        />
        <property
            name="chUuid"
            type="java.lang.String"
            column="CH_UUID"
            length="50"
        />
        <property
            name="reftext1"
            type="java.lang.String"
            column="REFTEXT1"
            length="50"
        />
        <property
            name="reftext2"
            type="java.lang.String"
            column="REFTEXT2"
            length="50"
        />
        <property
            name="reftext3"
            type="java.lang.String"
            column="REFTEXT3"
            length="50"
        />
        <!-- Associations -->
        <!-- bi-directional one-to-many association to Branch -->
        <set
            name="branches"
            lazy="true"
            inverse="true"
           cascade="all"
        >
            <key>
                <column name="CUSTOMER_UUID" />
            </key>
            <one-to-many
                class="hibernate.hibernate.Branch"
            />
        </set>
    </class>
    </hibernate-mapping>So, seems to me like Hibernate is also getting the data from the Branch-Table related to each Customer. Maybe this is the reason, why Hibernate is slower.
    But as you can see in the mapping-File of the customer, I wanted Branches to be lazy loaded.
    Do you have any ideas, why Hibernate is so much slower? Any hints for optimizing that code?
    Do you have any further tricks to optimize Hibernate? Unfortunately I am not allowed to make changes at the database, so I cannot e.g. set indices for optimization.
    However, I�m a Hibernate-Newbie. In fact, I just made this test and was very disappointed about its result, so I didn�t keep on working with Hibernate.
    But maybe you can proof me, that Hibernate is a good choice. If so, do you have any good resources (links, books) that help working with Hibernate in connection with JBOSS, describe how to map n:m relationships, show how to work with large results and so forth?
    Thanx for help,
    egon

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