How to write multiple ejb-jar.xml file in an ejb module

i am developing an ejb project. I hav a number of entity beans and session beans and their mapping in ejb-jar.xml. As the number of beans increases the entry of beans and mapping is also increasing. So i want to ask u that is there any mechanism so that i can divide the ejb-jar.xml file so that it will be easy to maintain it.

ejb-jar is the smallest composable unit for related EJB components. Your best bet is to create multiple ejb-jars and package them within the same enterprise application (.ear).

Similar Messages

How to use multiple ejb-jar.xml files

Hello -
If the project you work on has a lot of beans that you need to configure them in one ejb-jar.xml file. Then ejb-jar.xml file will be getting bigger and bigger. I am wondering if there is any way to divide the ejb-jar.xml file into multiple sub ejb-jar.xml files and then combin them together when deploy it. Same question question for the vendor ejb-jar.xml like weblogic-ejb-jar.xml.
Thanks!
Ben

HI Ben,
No, there is no notion of combining ejb-jar.xmls at deployment time in Java EE. There is no
set limit on the number of ejb components within an ejb-jar module either.
--ken

No table name specified in ejb-jar.xml file

Hi, I have an entity bean defined as follows:
<enterprise-beans>
<entity>
<display-name>SponsorEJB</display-name>
<ejb-name>SponsorEJB</ejb-name>
<home>com.ultradns.j2ee.components.sponsor.ejb.SponsorHome</home>
<remote>com.ultradns.j2ee.components.sponsor.ejb.Sponsor</remote>
<ejb-class>com.ultradns.j2ee.components.sponsor.ejb.SponsorEJB</ejb-class>
<persistence-type>Container</persistence-type>
<prim-key-class>java.lang.String</prim-key-class>
<reentrant>False</reentrant>
     <resource-ref>
          <res-ref-name>jdbc/jdbc/OracleDS</res-ref-name>
          <res-type>javax.sql.DataSource</res-type>
          <res-auth>Container</res-auth>
     </resource-ref>
<cmp-version>2.x</cmp-version>
<abstract-schema-name>sponsor</abstract-schema-name>
<cmp-field>
<primkey-field>guid</primkey-field>
     <query>
          <query-method>
               <method-name>findAll</method-name>
               <method-params></method-params>
          </query-method>
          <ejb-ql>
               <![CDATA[ SELECT OBJECT(a) FROM sponsor AS a]]>
          </ejb-ql>
     </query>
</entity>
</enterprise-beans>
In the database, I want this entity bean refers to a table named "sponsor", but I could not specify the relation in the ejb-jar.xml file. So when I deployed this bean, it auto created a table called "SponsorEJB". Where is this name come from, from display-name or ejb-name field?
Basically, how can I specify a bean "SponsorEJB" referes to a table "sponsor"?
Thanks,

First thing, to stop OC4J auto-creating tables, edit the file %J2EE_HOME%/config/application.xml. Change the first orion-application tag so that one attribute says autocreate-tables="false"
The ejb-jar.xml file describes your EJB's to the container. It is not supposed to describe which table each entity bean maps too, as this is an implementation specific property, so would not be portable between databases. Therefore you have to configure the container to point an entity to a table. Sun uses the sun-j2ee-ri.xml file to do this, and this has to be included in the deployment.
OC4J however uses the file 'orion-ejb-jar.xml', and will generate this for you. Since you have already deployed your application, this will have already been generated. Go to the directory %J2EE_HOME%/application-deployments. There will be a directory corresponding to your application name. In there is a directory corresponding to your ejb module name, and in there is the 'orion-ejb-jar.xml' file. If you open this file, you will see the entity deployment tags, an example of one is below. Edit the tag so that the table attribute points to the table in your database (note that there is a data-source attribute as well, so make sure that this points to the correct schema). The example below points the EJB Emp to the table EMP:
<entity-deployment name="Emp" max-instances="10" location="Emp" wrapper="EmpHome_EntityHomeWrapper3" table="EMP" data-source="jdbc/rob9iDS" locking-mode="optimistic" update-changed-fields-only="true" min-instances-per-pk="0" max-instances-per-pk="50" disable-wrapper-cache="true">
Hope this helps,
Rob

Stateless session Bean - xml and ejb-jar.xml file ???

Dear Experts,
Stateless-session bean
For Creating an ear file
we need ejb-jar.xml and weblogic-ejb-jar.xml files
Is these files are already available
or we have to type these files ??
Advance Thanks
Rengaraj.R

My best advice: surrender to use an IDE.
You wonder sometimes at how much productivity (read as 'time') could be wasted by doing something that could be done automatically. For a learning experience or a once only exercise is fine but as a routine thing, not worth it.
Cheers

How can I validate the ejb-jar.xml against a downloaded ejb-jar_2_1.xsd

I downloaded all configuration XML file schema,
so we can point to the schema locally. (To be able to work
even the network is not there.)
I tried to change the xmlns, xmlns:xsi and xsi:schemaLocation in the root element of ejb-jar.xml file,
I can't figure out how to make the server load the local ejb-jar_2_1.xsd file.
I'll appreciate someone can explain how the xsd file is loaded.
Thanks
Zhong

or use a tool like XMLSpy to validate your ejb-jar.xml against the XSD.
Cheers!
Dips

Query about reentrant in ejb-jar.xml file(in case of entity Bean)

Hi all friends,
I am new to EJB I couldn't understand in ejb-jar.xml file in case Entity Bean[<reentrant>False</reentrant>
&<reentrant>true</reentrant>]what is the function of this tag and what is the effect of value true and false of this tag.Can any one please explain it.
Regards
Bikash

Hi,
Re-entrant tag is used in the ejb-jar.xml to notify the container if you would want your bean to call itself through another bean.
Most of the time you would want it to be set to FALSE because you would have to consider the multi-threading issues if you set it TRUE.
Regards
Meka Toka

Oc4j generated finders in orion-ejb-jar.xml file causing errors

Any information or assistance would be greatly appreciated.
I have encountered a problem with the generated orion-ejb-jar.xml file.
It looks like the additional finder methods that are generated when the application
is deployed are incorrect from the 9.0.3 version to the new 10.1.2.0.2 version.
The original content of orion-ejb-jar.xml before additional finder syntax is added:
<finder-method query=
"NO_SYS_USER_OBJECT_HISTORY.USER_ID=UPPER($1) and
NO_SYS_USER_OBJECT_HISTORY.AUTOID NOT IN(
SELECT H1.AUTOID
FROM   NO_SYS_USER_OBJECT_HISTORY H1,
         (SELECT AUTOID
          FROM   NO_SYS_USER_OBJECT_HISTORY
          WHERE USER_ID=UPPER($1)
          ORDER BY DATE_TIME DESC) H2
WHERE ROWNUM <= $2
    AND H1.AUTOID = H2.AUTOID)">
<method>
<ejb-name>NoUserHistoryEntry</ejb-name>
<method-name>findOldest</method-name>
<method-params>
   <method-param>java.lang.String</method-param>
   <method-param>java.lang.Integer</method-param>
</method-params>
</method>
</finder-method>
After deploying in 9.0.3 the following information is added to the orion-ejb-jar.xml file:
<finder-method query=
"NO_SYS_USER_OBJECT_HISTORY.USER_ID=UPPER($1) and
NO_SYS_USER_OBJECT_HISTORY.AUTOID NOT IN(
SELECT H1.AUTOID
FROM   NO_SYS_USER_OBJECT_HISTORY H1,
         (SELECT AUTOID
          FROM   NO_SYS_USER_OBJECT_HISTORY
          WHERE USER_ID=$1
          ORDER BY DATE_TIME DESC) H2
WHERE ROWNUM <= $2
    AND H1.AUTOID = H2.AUTOID)">

<method>
<ejb-name>NoUserHistoryEntry</ejb-name>
<method-name>findOldest</method-name>
<method-params>
   <method-param>java.lang.String</method-param>
   <method-param>java.lang.Integer</method-param>
</method-params>
</method>
</finder-method>
After deploying in 10.1.2.0.2 the following information is added to the
orion-ejb-jar.xml file:
<finder-method query=
"NO_SYS_USER_OBJECT_HISTORY.USER_ID=UPPER($1) and
NO_SYS_USER_OBJECT_HISTORY.AUTOID NOT IN(
SELECT H1.AUTOID
FROM   NO_SYS_USER_OBJECT_HISTORY H1,
         (SELECT AUTOID
          FROM   NO_SYS_USER_OBJECT_HISTORY
          WHERE USER_ID=UPPER($1)
          ORDER BY DATE_TIME DESC) H2
WHERE ROWNUM <= $2
    AND H1.AUTOID = H2.AUTOID)">


<method>
<ejb-name>NoUserHistoryEntry</ejb-name>
<method-name>findOldest</method-name>
<method-params>
   <method-param>java.lang.String</method-param>
   <method-param>java.lang.Integer</method-param>
</method-params>
</method>
</finder-method>
The problem with the 10.1.2.0.2 generated finders is that it is prepending H1 when
it should be NO_SYS_USER_OBJECT_HISTORY which results in the following error:
Exception in thread "main" com.cdtelecom.vygroe.configuration.ConfigurationException:
com.evermind.server.rmi.OrionRemoteException:
Transaction was rolled back: Database error: java.sql.SQLException:
ORA-00904: "H1"."SITE_DESCRIPTION": invalid identifier
; nested exception is:
        java.sql.SQLException: ORA-00904: "H1"."SITE_DESCRIPTION": invalid identifier
        at com.cdtelecom.vygroe.configuration.ConfigurationSession.internalRecordAction(ConfigurationSession.java:869)
        at com.cdtelecom.vygroe.configuration.ConfigurationSession.recordAction(ConfigurationSession.java:401)
        at com.cdtelecom.vygroe.configuration.Configuration.recordActionSaveOrder(Configuration.java:886)
        at com.cdtelecom.vygroe.configuration.Configuration.getOrder(Configuration.java:239)
        at test10g.main(test10g.java:47)
I tried to manually edit the file but when I shutdown and restart oc4j it regenerates the file again.

Jingzhi -- If you define the correct EJB-QL you should get the correct SQL generated for the finder. If that's not happening can you verify it against the OC4J v903 production release and see if it is still happening. I don't know if this helps with the JDeveloper problem specifically but if you don't need to create your own finders then that I hope should help.
Thanks -- Jeff

Come error at doctype statement in ejb.jar.xml file

hello,
I use eclipse 3.1RC1 & lomboz emf-gef 3.1RC1 at linux os. when I create ejb project a error is created at line "doctype" in ejb-jar.xml file & it gives a error mess. java.sun.com can't be registrated

try :
p.stepid and p.stepversion are correct insert into <cmp-field> ?
and Processparameter is the correct name of <abstract-schema-name>?
is your <ejb-ql> insert in the right <entity> ?
findByProcessStep(Integer, Integer) is the unique name in your ejb-jar? and in the (LocalHome ||RemoteHome)

Sun-ejb-jar.xml file is increased after deploying

When I deploy my application the size of sun-ejb-jar.xml file is increased from 140K to 6.5M!!! When I review a new file I have found that all finder methods from all beans were included into the each entity beans. Is it correct?
Thank you,
Sergey

up

How ejb-jar.xml is Used by ejb Container

Hi,
Can anyone please explain me about how ejb-jar.xml is Used by ejb Container when a request is sent by a client(ie StandAlone program or a WebService)
Thanks in Advance
Venkat.

Hi Benny,
Nice answer to a self explainig question :-).
Regards,
Daniel
p.s. THX to Sun and J2EE 5 and especially EJB3 (and don't forget about SAP, NWCE is really cool!!!)

How to write data to an XML file present under application server

frnds: can ne one tell me, how to write data in to a file, which is present under a application server
Ex: i want to write a string data in to a file test.txt which is present under "http://localhost:8080/<some_webapp>/test.txt"
Note:i have deploted a service<some_webapp> under Tomcat/webapps dir

Very simple. A servlet can writes to that file if it has the good rights.
In the servlet get (or post) method, use a code like this:
import java.io.*;
protected void doGet(HttpServletRequest req, HttpServletResponse resp) {
try {
String filePath = this.getServletContext().getRealPath("/text.txt");//See http://java.sun.com/products/servlet/2.2/javadoc/javax/servlet/ServletContext.html#getRealPath(java.lang.String)
         PrintWriter writer = new PrintWriter (filePath);
        //or BufferedWriter out = new BufferedWriter(new FileWriter(filePath));
        writer .println("aString");
       writer.flush();
        writer .close();
    } catch (Exception e) {
       e.printStackTrace();
}Hope That Helps

Toplink-ejb-jar.xml config with weblogic-ejb-jar.xml

Hello,
To use toplink with EJB's deployed in Weblogic.
I changed weblogic-ejb-jar.xml :
(Because, it does not allow me to change <type-identifier> and <type-version> elements)
<type-identifier>WebLogic_CMP_RDBMS</type-identifier>
<type-version>7.0</type-version>
<type-storage>META-INF/toplink-ejb-jar.xml</type-storage>
Here, is the toplink-ejb-jar.xml:
(Because, I am asked to give PUBLIC value for Weblogic 8.1.0....)
<!DOCTYPE toplink-ejb-jar PUBLIC "-//BEA Systems, Inc.//DTD WebLogic 8.1.0 EJB RDBMS Persistence//EN" "file://D:/Toplink10g/toplink/config/dtds/toplink-wls-ejb-jar_10_0_3.dtd">
<toplink-ejb-jar>
<session>
<name>myUniqueSession</name>
<project-xml>META-INF/project.xml</project-xml>
<login>
<connection-pool>demoPool</connection-pool>
</login>
</session>
</toplink-ejb-jar>
1. I have also given full path to the "toplink-wls-ejb-jar_10_0_3.dtd", but I still get parsing error:
"myBeans.jar": [EJB:011019]While reading META-INF/toplink-ejb-jar.xml, the persistence layer of the Entity EJB failed to deploy. The error was:
"myBeans.jar": Error in descriptor line 5: Error parsing file at line: 5 column: 18. Element type "toplink-ejb-jar" must be declared..
2. Also, How I can avoid the full path to the DTD???
Thanks for your help in this regard!

You are not properly configured to use TopLink with Weblogic. You need to place the TopLink_CMP_Descriptor.xml install file in your Weblogic lib/persistence directory. Add "TopLink_CMP_Descriptor.xml" to your persistence.install file and then update weblogic-ejb-jar.xml to reference the correct TopLink persistence type and versions, ie,
<type-identifier>TopLink_CMP_2_0</type-identifier>
<type-version>10</type-version>
<type-storage>META-INF/toplink-ejb-jar.xml</type-storage>
See the TopLink developer guide for more information and configuration details.
http://download-east.oracle.com/docs/cd/B10464_05/web.904/b10313/pkg_depl.htm#1124524
Cheers,
Guy

Sample weblogic-ejb-jar.xml for Resource-ref EJB 3.0

I am trying to create an MDB that can be re-used under different names.
@MessageDriven(description = "An MDB that transfers messages from one Queue to another", activationConfig = { @ActivationConfigProperty(propertyName = "destinationType", propertyValue = "javax.jms.Queue") })
@TransactionAttribute(TransactionAttributeType.REQUIRED)
public class TransferMdb implements MessageListener {
private static final Logger LOG = Logger.getLogger(TransferMdb.class);
@Resource(name = "jms/connfactory")
private ConnectionFactory connectionFactory;
@Resource(name = "jms/targetDestination")
private Queue targetDestination;
<ejb-jar version="3.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/ejb-jar_3_0.xsd">
<enterprise-beans>
<message-driven>
<ejb-name>TransferMdb</ejb-name>
<ejb-class>TransferMdb</ejb-class>
</message-driven>
</enterprise-beans>
</ejb-jar>
<weblogic-ejb-jar>
<weblogic-enterprise-bean>
<ejb-name>TransferMdb</ejb-name>
<message-driven-descriptor>
<pool>
<max-beans-in-free-pool>200</max-beans-in-free-pool>
<initial-beans-in-free-pool>5</initial-beans-in-free-pool>
</pool>
<destination-jndi-name>test_queue</destination-jndi-name>
<transaction-descriptor>
<trans-timeout-seconds>20</trans-timeout-seconds>
</transaction-descriptor>
</message-driven-descriptor>
<reference-descriptor>
<resource-description>
<res-ref-name>jms/connectionfactory</res-ref-name>
<jndi-name>connectionfactory</jndi-name>
</resource-description>
<resource-description>
<res-ref-name>jms/targetDestination</res-ref-name>
<jndi-name>reply_queue</jndi-name>
</resource-description>
</reference-descriptor>
</weblogic-enterprise-bean>
</weblogic-ejb-jar>
However when I deploy the above, I get exceptions such as:
problem: cvc-complex-type.2.4a: Expected elements 'initial-context-factory@http://www.bea.com/ns/weblogic/weblogic-ejb-jar provider-url@http://www.bea.com/ns/weblogic/weblogic-ejb-jar connection-factory-jndi-name@http://www.bea.com/ns/weblogic/weblogic-ejb-jar jms-polling-interval-seconds@http://www.bea.com/ns/weblogic/weblogic-ejb-jar jms-client-id@http://www.bea.com/ns/weblogic/weblogic-ejb-jar generate-unique-jms-client-id@http://www.bea.com/ns/weblogic/weblogic-ejb-jar durable-subscription-deletion@http://www.bea.com/ns/weblogic/weblogic-ejb-jar max-messages-in-transaction@http://www.bea.com/ns/weblogic/weblogic-ejb-jar distributed-destination-connection@http://www.bea.com/ns/weblogic/weblogic-ejb-jar use81-style-polling@http://www.bea.com/ns/weblogic/weblogic-ejb-jar init-suspend-seconds@http://www.bea.com/ns/weblogic/weblogic-ejb-jar max-suspend-seconds@http://www.bea.com/ns/weblogic/weblogic-ejb-jar security-plugin@http://www.bea.com/ns/weblogic/weblogic-ejb-jar' instead of 'transaction-descriptor@http://www.bea.com/ns/weblogic/weblogic-ejb-jar' here in element message-driven-descriptor@http://www.bea.com/ns/weblogic/weblogic-ejb-jar:<null>
problem: cvc-complex-type.2.4a: Expected elements 'transaction-descriptor@http://www.bea.com/ns/weblogic/weblogic-ejb-jar iiop-security-descriptor@http://www.bea.com/ns/weblogic/weblogic-ejb-jar resource-description@http://www.bea.com/ns/weblogic/weblogic-ejb-jar resource-env-description@http://www.bea.com/ns/weblogic/weblogic-ejb-jar ejb-reference-description@http://www.bea.com/ns/weblogic/weblogic-ejb-jar service-reference-description@http://www.bea.com/ns/weblogic/weblogic-ejb-jar enable-call-by-reference@http://www.bea.com/ns/weblogic/weblogic-ejb-jar network-access-point@http://www.bea.com/ns/weblogic/weblogic-ejb-jar clients-on-same-server@http://www.bea.com/ns/weblogic/weblogic-ejb-jar run-as-principal-name@http://www.bea.com/ns/weblogic/weblogic-ejb-jar create-as-principal-name@http://www.bea.com/ns/weblogic/weblogic-ejb-jar remove-as-principal-name@http://www.bea.com/ns/weblogic/weblogic-ejb-jar passivate-as-principal-name@http://www.bea.com/ns/weblogic/weblogic-ejb-jar jndi-name@http://www.bea.com/ns/weblogic/weblogic-ejb-jar local-jndi-name@http://www.bea.com/ns/weblogic/weblogic-ejb-jar dispatch-policy@http://www.bea.com/ns/weblogic/weblogic-ejb-jar remote-client-timeout@http://www.bea.com/ns/weblogic/weblogic-ejb-jar stick-to-first-server@http://www.bea.com/ns/weblogic/weblogic-ejb-jar' instead of 'reference-descriptor@http://www.bea.com/ns/weblogic/weblogic-ejb-jar' here in element weblogic-enterprise-bean@http://www.bea.com/ns/weblogic/weblogic-ejb-jar:<null>
at weblogic.descriptor.internal.MarshallerFactory$1.evaluateResults(MarshallerFactory.java:234)
at weblogic.descriptor.internal.MarshallerFactory$1.evaluateResults(MarshallerFactory.java:221)
at weblogic.descriptor.internal.MarshallerFactory$1.createDescriptor(MarshallerFactory.java:146)
at weblogic.descriptor.BasicDescriptorManager.createDescriptor(BasicDescriptorManager.java:306)
at weblogic.application.descriptor.AbstractDescriptorLoader2.getDescriptorBeanFromReader(AbstractDescriptorLoader2.java:788)
Truncated. see log file for complete stacktrace
I am clearly missing items in the weblogic-ejb-jar.xml. If anyone has a sample or tips, that would be awesome as a starting point.

Those tags just declare that you are using our CMP provider and that
your descriptor is in META-INF/weblogic-cmp-rdbms-jar.xml.
FWIW, you might also want to check out EJBGen. It tends to keep more up
to date with WLS than xdoclet.
-- Rob
Gen wrote:
I am using xdoclets to generate descriptor file weblogic-ejb-jar.xml
for a BMP entity bean. Xdoclet is generating the descriptor file
alright, but is putting the following extra tags. This happens even
for samples which come with the download, so my tags in java file are
not wrong.
My question is, are the extra tags below harmless, or should I
manually go to each desciptor file and remove them?
Thanks.
----------- EXTRA TAGS GENERATED START ---------
persistence> <persistence-type>
<type-identifier>WebLogic_CMP_RDBMS</type-identifier>
<type-version>6.0</type-version>
<type-storage>META-INF/weblogic-cmp-rdbms-jar.xml</type-storage>
</persistence-type>
<persistence-use>
<type-identifier>WebLogic_CMP_RDBMS</type-identifier>
<type-version>6.0</type-version>
</persistence-use>
</persistence>
----------- EXTRA TAGS GENERATED END ---------
----------- TAGS I PUT IN JAVA CLASS START --------
* @ejb:bean name="com.ejb.entity.Customer"
* jndi-name="com.ejb.entity.CustomerHome"
* view-type="remote"
* type="BMP"
* primkey-field="com.ejb.entity.CustomerPK"
* reentrant="false"
* @weblogic:cache
* max-beans-in-cache="1000"
* read-timeout-seconds="900"
* concurrency-strategy="ReadOnly"
----------- TAGS I PUT IN JAVA CLASS END --------

Weblogic-ejb-jar.xml for a Session EJB

The weblogic-ejb-jar.xml generated for a Session EJB with local interfaces has a jndi-name element instead of local-jndi-name.
1. Create a Session EJB.
Select Include Local Interfaces.
2. In the META-INF directory select New>General>Deployment Descriptors>weblogic-ejb-jar.xml
The deployment descriptor generated has a jndi-name element.
For a Session EJB with local interfaces the element should be local-jndi-name.
thanks,
Deepak

weblogic-ejb-jar.xml jndi-name (instead of local-jndi-name) is with JDeveloper version 10.1.2 & 10.1.3

How to write multiple inputs into 1 file + how to use PWM

hi,
I wanna take analog inputs from 2 channels, then write them into a single file, have them the data plotted on 1 graph. how can I do that?
also, I wanna output 2 PWM signal lines after some calculations with the data of those 2 channels. how can I do it?
another thing:
can I use Labview to make a state-obersver program?
the board I am using has part number: 183554C-01. it is a DAQ Signal Acessory.

hope this helps:
Harold Timmis
[email protected]
Orlando,Fl
*Kudos always welcome
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How to write multiple ejb-jar.xml file in an ejb module

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