CMP Entity beans using local interfaces

Why CMP entity beans with CMR relation ship using local interfaces only?
Why we should not use remote interface to get the CMR field relationship?
Pls give me the solutions

"Local interfaces provide the foundation for container-managed relationships among entity beans and session beans. The bean uses the local interface to maintain its references to other beans. For example, an entity bean uses its local interfaces to maintain relationships to other entity beans. Using local interfaces, beans can also expose their state and use pass-by-reference to pass their state between related bean instances. "
http://java.sun.com/developer/technicalArticles/ebeans/EJB20CMP/

Similar Messages

Problems deploying entity beans with local interfaces on Jboss?

I'm trying to deploy a simple entity bean using local interfaces on Jboss 3.2.1 and I obtain the following exception:
19:08:51,875 WARN [verifier] EJB spec violation:
Bean : UsersEJB
Section: 9.2.2
Warning: The entity bean class must not be defined as abstract.
19:08:51,875 WARN [verifier] EJB spec violation:
Bean : UsersEJB
Section: 9.4.7.1
Warning: The primkey-field element must name a public field in the bean implemen
tation class.
Any idea?
Thanks,
Marco

I guess you are missing <cmp-version>2.x</cmp-version> for your first warning and <primkey-field>primary key field </primkey-field> for you second warning in your ejb-jar.xml

Do I need to Create Primary Key Class for Entity beans with Local interface

Do I need to Create Primary Key Class for Entity beans with Local interface?
I have created my entity bean with the wizard in Sun One Studio and it does not create a primary key class for you.
I thought that the primary key class was required. My key is made up of only one field.
Anyone know the answer.
Jim

u dont need to create a primary key class for a entity bean.if ur table's primary key feild(int ,float) is a built in or primitive data type,then u dont need one.But if ur table has a primary key field which is non primitive (for example StudentID,ItemID etc)then u have to create a primary key class.
hope this helps :-)

Deploying entity beans with Local interfaces on Jboss

Hi, I'm trying to deploying a simple entity bean on Jboss. The EJB has been developed with Local Interfaces because then I want to access it with a session bean facade.
I get the following error:

23:41:25,984 WARN [verifier] EJB spec violation:
Bean : UsersEJB
Section: 9.2.2
Warning: The entity bean class must not be defined as abstract.
23:41:25,984 WARN [verifier] EJB spec violation:
Bean : UsersEJB
Section: 9.4.7.1
Warning: The primkey-field element must name a public field in the bean implemen
tation class.

I'm following what is wrote in the Professional EJB editeb by wrox?
Is it possible to deploy an entity bean alone with Local interfaces? Is there something I'm missing? It's true that I defined the implementation class as abstract, but because there are abstract getter/setter methods.
Thanks for any help,
Marco

Greetings,
Hi, I'm trying to deploying a simple entity bean on
Jboss. The EJB has been developed with Local
23:41:25,984 WARN [verifier] EJB spec violation:
Bean : UsersEJB
Section: 9.2.2
Warning: The entity bean class must not be defined as abstract.
23:41:25,984 WARN [verifier] EJB spec violation:
Bean : UsersEJB
Section: 9.4.7.1
Warning: The primkey-field element must name a public field in
the bean implementation class.What version of JBoss are you using? These errors indicate container compliance with EJB spec 1.1, not 2.0 to which your CMP beans are written. Download the latest JBoss release version - 3.2.1 - and you should not see this problem.
Is it possible to deploy an entity bean alone with
Local interfaces? Is there something I'm missing? It'sYes it is (no, you are not "missing something" ;). In fact, this is recommended practice in most cases under CMP 2.0 - CMR having been a major impetus to the development of Local interfaces in the specification. ;)
true that I defined the implementation class as
abstract, but because there are abstract getter/setter
methods.No problems. You are "right on track" for CMP 2.0. :)
Thanks for any help,
MarcoRegards,
Tony "Vee Schade" Cook

How to use local interface in my easy code ?

hi everybody
I work on an ejb project. My code is like that to test remote interface (and it works) :
public class TestStudent {
   Properties properties;
   public TestStudent() {
      properties = new Properties();
      properties.put("java.naming.factory.initial",
      "org.jnp.interfaces.NamingContextFactory");
      properties.put("java.naming.factory.url.pkgs",
      "org.jboss.naming:org.jnp.interfaces");
      properties.put("java.naming.provider.url", "jnp://localhost:1099");
      properties.put("jnp.disableDiscovery", "true");
   public static void main(String[] args) {
      TestStudent beanStudent = new TestStudent();
      beanStudent.createBean();
   public void createBean() throws EJBException {
      try {
         InitialContext context = new InitialContext(properties);
         Object object = context.lookup(StudentHome.JNDI_NAME);
         StudentHome studentHome = (StudentHome) PortableRemoteObject.narrow(object,StudentHome.class);
         Student student = studentHome.create();
         student.setName("pirlouit");
         System.out.println(student.getId());
         System.out.println(student.getName());
      } catch (NamingException e) {
         throw new EJBException(e);
      } catch (RemoteException e) {
         throw new EJBException(e);
      } catch (CreateException e) {
         throw new EJBException(e);
}Then I do quite the same thing to test local interface like in the following code but it doen't work :
public class TestStudent {
   Properties properties;
   public TestStudent() {
      properties = new Properties();
      properties.put("java.naming.factory.initial",
      "org.jnp.interfaces.NamingContextFactory");
      properties.put("java.naming.factory.url.pkgs",
      "org.jboss.naming:org.jnp.interfaces");
      properties.put("java.naming.provider.url", "jnp://localhost:1099");
      properties.put("jnp.disableDiscovery", "true");
   public static void main(String[] args) {
      TestStudent beanStudent = new TestStudent();
      beanStudent.createBean();
   public void createBean() throws EJBException {
      try {
         InitialContext context = new InitialContext(properties);
         Object object = context.lookup(StudentLocalHome.JNDI_NAME);
         StudentLocalHome studentLocalHome = (StudentLocalHome)object;
         System.out.println("studentLocalHome is null ? "+studentHome.equals(null));
         StudentLocal student = studentLocalHome.create();
         student.setName("pirlouit");
         System.out.println(student.getId());
         System.out.println(student.getName());
      } catch (NamingException e) {
         throw new EJBException(e);
      } /*catch (RemoteException e) {
         throw new EJBException(e);
      }*/ catch (CreateException e) {
         throw new EJBException(e);
}The print of "student local home is null ?" give me 'true' which is not the answer I want ... so here is the problem. How can I get my entity bean using local interface ?
For the moment 've got the exception (which appears on instruction "StudentLocal student = studentLocalHome.create();") :
Exception in thread "main" java.lang.NullPointerException
     at org.jboss.ejb.plugins.local.LocalHomeProxy.invoke(LocalHomeProxy.java:118)
     at $Proxy0.create(Unknown Source)Please help !! Thank you very much !

Write a JSP to test Local Interface. You cannot call Local Interface from a remote JVM.
Jay
http://www.javarss.com - Java News from around the world.
Visit JavaRSS.com and add above signature to your messages. Thanks!

Exception in calling a CMP Entity Bean

I have deployed a simple CMP entity bean using jboss App. server, Now while executing the client i got the following exception,
error in clientjavax.naming.CommunicationException [Root exception is java.rmi.ServerException: RemoteException occurred in server thread; nested exception is:
java.rmi.UnmarshalException: error unmarshalling arguments; nested exception is:
java.lang.ClassNotFoundException: org.jnp.interfaces.FastNamingProperties (no security manager: RMI class loader disabled)]
regards,
NaveenBabu.A

Hi,
It is likely that some libraries are missing in your client environment. (it has nothing to do with security)
Make sure that the libraries in JBoss client (folder your_jboss_folder/client) are in your client application classpath. In particular, look for jnp-client.jar.
This should solve the problem.
Bruno Collet
http://www.practicalsoftwarearchitect.com

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

Hi,
I have some CMP Entity Beans with finder methods defined in ejb-ql. In my ejb-jar, within <entity> definitions I have something like:
    <entity>
      <abstract-schema-name>BeanName</abstract-schema-name>
      <cmp-field><field-name>fieldOne</field-name></cmp-field>
      <cmp-field><field-name>fieldTwo</field-name></cmp-field>
      <query>
        <query-method>
          <method-name>findAll</method-name>
          <method-params></method-params>
        </query-method>
        <ejb-ql>SELECT OBJECT(o) FROM BeanName o</ejb-ql>
      </query>
    <entity>
And in persistent.xml:
<db-properties>
     <data-source-name>datasource_name</data-source-name>
</db-properties>
<entity-bean>
     <ejb-name>BeanName</ejb-name>
     <table-name>table_name</table-name>
     <field-map key-type="NoKey">
     <field-name>fieldOne</field-name>
     <column><column-name>column_one</column-name></column>
      </field-map>
     <field-map key-type="NoKey">
     <field-name>fieldTwo</field-name>
     <column><column-name>column_two</column-name></column>
      </field-map>
      <finder-descriptor>
          <method-name>findAll</method-name>
          <method-params/>
     </finder-descriptor>
Once deployed, on server side, I can found a java source file (with corresponding compiled class file) in path:
j2ee/cluster/server0/apps/companyName/MyEARApp/EJBContainer/temp/temp38837373733/route/to/package/
with names:
BeanName0_0pm.java
BeanName0_0PM.class
and the generated java file contains this code:
public java.util.Enumeration ejbFindAll() throws javax.ejb.FinderException, javax.ejb.EJBException {
    TransactionContext tc = pm.getTransactionContext();
    Connection conn = null;
    PreparedStatement pSt = null;
    ResultSet ejb_rs = null;
    int status = javax.transaction.xa.XAResource.TMSUCCESS;
    try {
      conn = pm.getConnectionForFindMethod();
      pSt = conn.prepareStatement("SELECT \"O\".\"COLUMN_ONE\",\"O\".\"COLUMN_TWO\", FROM \"TABLE_NAME\" \"O\"");
      ejb_rs = pSt.executeQuery();
I'm trying to call this method but it throws a SQLException when preparing the statement.
It seems that Informix does not like this SQL syntax because of upper case names, doble quotes on table alias, or something else.
When editing persistent.xml in netweaver, I can define the element <datasource-vendor> as ORACLE, SAPDB, MS_SQL_SERVER, DB2_UDB_AS400 or DB2_UDB_OS390 but INFORMIX is not an accepted value.
Is there any way to define how this SQL query is build?
Thanks in advance.

The return type of the finder method defined in the remote home interface is either the entity bean's remote interface or a collection of objects implementing the entity bean's remote interface. The return type of the finder method defined in the local home interface is either the entity bean's local interface or a collection of objects implementing the entity bean's local interface

CMP entity bean update after database update

I'm new to JDeveloper and J2EE. Since JDev 10.1.3 is now production software I finally got started with it. Everything was quite simple to achieve however I have one problem.
My current setup is faily easy. I have a statelss session bean and a CMP entity bean using TopLink (both EJB 2.1). Getting them both created went smooth and having the two talk was as easy as pie thanks to Jdev.
The problem I have is with the entity bean. I'm using a custom finder method to retrieve records using non-PK fields. This works like a charm and I'm getting the data I need. But when I update the data in the database (OracleXE) and I rerun the client I get the old data. The only way for me to get new data is to restart the embedded OC4J server in JDev.
How can I have the entity bean updated by changes in the database?

Thanks Avi!
I spent some time with the documentation and I see I can configure the cache. However how to do this is not clear to me. I have the impression that most of it relates to BMP entity beans.
Apparantly there is a DoNotCheckCache method I can invoke on the query, but I have no idea how to achieve this...
Message was edited by:
Deddiekoel

Error in deploying CMP Entity Beans

Hello,
When I created a CMP Entity Bean using the JDeveloper Release Candidate and try to deploy it I get the following message:
Auto-creating table: create table POGROUP_PRESS_RELEASE (press_release_id integer not null primary key, press_release_date varchar (255) null, title varchar (255) null, time varchar (255) null, release_type varchar (255) null, URL VARCHAR2(100))
Warning: Error creating table: ORA-00955: name is already used by an existing object
What does this mean? Does it mean that this bean cannot be deployed. If the table already exists in the database shouldn't it use the table instead of trying to create the table?
Any help would be appreciated,
Gopi

initialize "table" attribute of <entity-deployment> element to POGROUP_PRESS_RELEASE.This will prevent auto-create functionality of OC4J.
However this <entity-deployment> tag present only in orion-ejb-jar.xml.So you have to create this file and include along with ejb-jar.xml in jar file.
Sample orion-ejb-jar.xml looks like this....
<orion-ejb-jar deployment-version="1.0.2.2" deployment-time="ea013a2eda">
<enterprise-beans>
<entity-deployment name="TestHome" location="TestHome" wrapper="TestHome_EntityHomeWrapper5" table="POGROUP_PRESS_RELEASE" data-source="jdbc/OracleDS">
<primkey-mapping>
<cmp-field-mapping name="m_ID" persistence-name="ID" />
</primkey-mapping>
<resource-ref-mapping name="jdbc/OracleCoreDS" />
</entity-deployment>
</enterprise-beans>
</entity-deployment>
</orion-ejb-jar>
For complete DTD :
http://xmlns.oracle.com/ias/dtds/orion-ejb-jar.dtd
Hope this helps.....
--Venky

Using a CMP Entity Bean local stub as a field of another CMP Entity Bean

Hello,
Is it possible to implement a field of a CMP Entity bean as another CMP Entity bean and how is it done?
I've seen a pseudo code for this in Ed Roman's Mastering EJBs, second edition, but I can't seem to get it to work (pages: 330 - 1:1 using CMP and 339 - fake M:N using CMP).
I'm using SUN ONE Application Sever 7. Is this server capable of this?
I'm trying to implement a fake M:N relationship using 3 beans: 2 for each side of the relationship and one as the "bridge" table.
For example, the two beans on each side of the relationship are SubscriberBean, SubscriptionBean and the "bridge: bean is SubscriberSubscriptionBean. The SubscriberSubscriptionBean has two fields: SubscriberLocal stub and SubscriptionLocal stub.
Please let me know if you need more information to answer this question.
Thanks.
Nikola

Im sorry but i dont know about the example you are talking about. I kinda learn
all those techniques from forums, articles and tutorials because book often suffer from
not having the information im mostly looking for.
As far as i understand you, you want to implement a bridge been, which is representing a row in a join table. So that if one side of the relation is deleted the join-table entry (your bridge-CMP-Bean) is cascaded. Right?
First of all the simple part: (My approach)
- The joint table is foreign keys only - without a relation description. -
In this case you dont have to implement a bridge bean. Because it just wouldnt represent anything of sense.
Lets think of an entity/table USER whith the columns name (PRIMARY KEY), and prename.
Our second entity/table is ADDRESS with the columns road (PRIMARY KEY) and housenr.
The join table is simply: USER_ADDRESS with fk_name (FOREIGN KEY) and fk_road (FOREIGN KEY) both on CASCADE DELETE. So if the address is deleted the mapping entry is deleted, too same for the user part:
USER -> USER_ADDRESS <- ADDRESS.
Our entity Beans are called User and Address in class-names JNDI-names and names.
Now we want to create the CMR mapping so we can access the addresses of a user from the user bean directly. The methods on the user side are:
public abstract Collection getAddresses();
and
public abstract void setAddresses(Collection new_addresses);
the xdoclet comments on the User side are (for the getter only)
* @ejb.interface-method
* @ejb.relation
*                name = "User-has-Addresses"
*                role-name = "User-Addresses"
*                target-ejb = "Address"
*                target-multiple = "true"
* @sunone.relation
*                column="USER_ADDRESS.fk_name"
*                target="USER_ADDRESS.fk_road"
public abstract Collection getAddresses();
for the other side of the relation we define in the Address-Entity
public abstract Collection getUsers();
and
public void setUsers(Collection users);
the xdoclet comments on the Address side are (for the getter only)
* @ejb.interface-method
* @ejb.relation
*                name = "User-has-Addresses"
*                role-name = "Address-User"
*                target-ejb = "User"
*                target-multiple = "true"
* @sunone.relation
*                target="USER_ADDRESS.fk_road"
*                column="USER_ADDRESS.fk_name"
As we dont want the user or address to be deleted if the other side of the relation is deleted we dont specify cascade-delete="yes" in the ejb.relation namespace.
The sun-cmp-mappings.xml should now look like this:
(For the User - side)

<cmr-field-mapping>
<cmr-field-name>addresses</cmr-field-name>
<column-pair>
<column-name>USER_ADDRESS.fk_name</column-name>
<column-name>USER_ADDRESS.fk_road</column-name>
</column-pair>
</cmr-field-mapping>
and similar on the Address-Side:
<cmr-field-mapping>
<cmr-field-name>users</cmr-field-name>
<column-pair>
<column-name>USER_ADDRESS.fk_road</column-name>
<column-name>USER_ADDRESS.fk_name>/column-name>
</column-pair>
</cmr-field-mapping>
Dont forget that all elements in the Collection must be of the right Interface-type.
First of all the harder part:
Now what you might want is when the relation has some information specified like user live at address and is tenant or facility manager.
The, in the first step you will have to implement the UserAddressRelation entity which will have to CMR fields of the 1:N type.(Just as you wish)
Lets think of the example above extended by the relation type. Our relation bean is named UserAddressRelation.
Now User has the methods as above but the classes in the Collection must now be of the UserAddressRelationLocal/Remote interface and not AddressLocal/Remote-interface.
You will have to change the xdoclet comment to:
* @ejb.interface-method
* @ejb.relation
*                name = "User-has-Addresses"
*                role-name = "User-Address"
*                target-ejb = "UserAddressRelation"
*                target-multiple = "true"
* @sunone.relation
*                target="USER_ADDRESS.fk_name"
*                column="USER.name"
So we now dont reference the other side bean directly. We reference the relation EntityBean. Do the similar changes on the other side.
In particular you will have to specify 4 CMR mappings now:
1. User to UserAddressRelation 1:N
2. UserAddressRelation N:1
3. Address to UserAddressRelation 1:N
4. UserAddressRelation N:1
Which i dont want to explain in detail now because its kinda all the same as above.
Now you cann access the Addresses of a user in the way.
UserLocal.getAddresses(); <- !you get the mappings!
UserLocal.getAddresses().item(0).getAddress() <- you get the address (this is dirty coding just for understanding)
UserLocal.getAddresses().item(0).getUserRole() <. you get the role of the user at this address.
Hope this helped you. You are welcome to ask any detailed question.

How to use same transaction when calling CMP entity beans and DAO (JDBC)

We are currently using Weblogic 8.1 SP2 with an Oracle 10g database (using XA thin and non-XA drivers).
We have a session bean that invokes an entity bean and a DAO (data access object pattern) in order to add data in 2 separate tables (account and history). Rows are added to the first (account) table using a CMP Entity bean while inserts are done in the 2nd (history) table using a DAO. Here is some pseudo code:
addHistorySessionBean (trans-attribute="Required")
begin
Step #1 - call addAccountEntityBean (trans- attribute="Required")
Step #2 - call addHistoryDAO (get datasource, connection)
end
The 2nd table (history) has a foreign key constraint to ensure that the corresponding key exists in the first (account) table. Unfortunately, DAO inserts on the 2nd (history) table fail with a foreign key constraint violation (INTEGRITY CONSTRAINT VIOLATION - PARENT KEY NOT FOUND!) since they cannot see the row added to the 1st (account) table in step #1 by the CMP entity bean.
How does one ensure that all this is done in a single transaction ? It appears that the app server creates two seperate transactions (one for the session bean facade and the entity bean and a 2nd transaction (when we retrieve a connection using the same data source JNDI name) for the DAO.
A post on server side suggested using a "<resource-ref>" in the session bean to tie the two potentially separate transactions together, but that does not work for us. However, I am not sure if we are doing that correctly. After we define the resource ref in the session facade bean, do we use the resource ref "name" attribute to lookup the datasource or do we still lookup the datasource by JNDI name ? Do we need to define the resource-ref tag in the entity bean also ?
Does Weblogic allow using a single transaction for this type of a scenario ? How does one specify within Weblogic that the same transaction should be utilized by the entity bean and any subsequent DAOs?
People have also suggested that we defer constraint checking until the transaction(s) are committed but that sounds like a work acount without addressing this issue. Would postponing the constraint checking in Oracle cause any additional overhead ?
Any suggestions with specific examples or documentation on how to address this issue will be gratefully appreciated.

Thanks for your suggestion. Unfortunately, this does not work since it appears that there are 2 separate transactions going on here. One, the original one initiated by the session bean and used by the entity bean and the other initiated by the DAO. Any other ideas appreciated.
Hi,
Try setting the delay-database-inserts tag to
ejbCreate in RDBMS descriptor file.
http://bernal/stage/wls/docs81/ejb/DDreference-cmp-jar
.html#1113981
vasanthi ramesh

Error while using sybase trigger with the CMP entity bean,ejb version 2.1

Hi All,
I am using ejb version 2.1 and using entity bean (Transaction required) ,i am trying to update data in sybase(ver 12.3) database table
I am using session bean(Transaction required) to update the multiple entity beans in a while loop.It is working fine .But when i am trying to run it with the trigger which updates multiple tables in different sybase databases on update of each entity.Then it throws NoSuchEntityException and it rollback the whole transaction.
My trigger has only few simple update statements and the trigger runs fine without my CMP entity bean.is the CMP does not support the update triggers in sybase or is it the problem with the transaction.
Please help
Thanks
Anshu

If you can have a look at a cmp example in the samples that ship with the server. My guess is that the weblogic-ejb-jar.xml file is missing the <persistence-use> element which for 810 would look like:
<persistence>
<persistence-use>
<type-identifier>WebLogic_CMP_RDBMS</type-identifier>
<type-version>7.0</type-version>
<type-storage>META-INF/weblogic-cmp-rdbms-jar.xml</type-storage>
</persistence-use>
</persistence>
I seem to recall that the elements might be slightly different in structure for the wls700 version of the DTD, so please check that (I cannot, I'm at home and don't have everything here).
Give that a try and see if it doesn't solve your compilation failure.
Also, the compilation should not be throwing a null pointer exception in a case like that, I consider that to be a bug.
-thorick

Using local interfaces for EJB (session bean)

Hi,
I�ve a question regarding when to use the Local interfaces(EJBLocal and EJBLocalHome) of a enterprise bean. I understand that calls to enterprise bean can be made locally if the client which is invoking is in the same JVM as that of EJB. I�ve written a web client (servlet) which is packaged in a EAR and this servlet is trying to invoke a session bean which is in a �different� EAR using local interfaces. Both the EARs have been deployed in a single server (websphere 6.0 server). It didn�t work for me this way�..If I package the servlet in the same EAR of session bean then it works fine.
So is this to say that both EARs are not running on the same JVM? Or should it work even if the client and the session bean are in different EARs but in same server?
Can anyone explain me the fundamentals behind this.
Thanks in advance

Local access is only portable within the same .ear. For example, the Java EE SDK and SUN's
application servers have never supported local EJB access from a web/EJB component in a different
.ear. One issue is that local access requires that both the caller and target EJB have the same
classloader. By definition, different Java EE applications have distinct classloaders. In addition,
in Java EE 5 persistence context propagation does not span applications, so it wouldn't work in the
local case.
--ken

Use direct JDBC with CMP entity bean in one transaction

I am trying to use direct JDBC call with CMP entity bean within a session
bean method that requires transaction. The problem is that it appears these
are not in the same transaction. When I use the JDBC call, the CMP entity
bean update to the DB has not been committed yet.
We are using Weblogic 5.1 SP6. The DB is Oracle.
What I do for the JDBC is get a new connection from the pool using weblogic
jdbc pool driver.
Any help would be appreciated.
Patrick

Hi. You can do JDBC and invoke CMP EJBs and have this all treated
as one transaction, if your hand-written code explicitly starts
a JTS transaction, then uses the jts driver or a TxDataSource to
get the JDBC connection. Then your code can call transactional
EJBs and their work will be included in the transaction you started.
Assuming the bean work went OK, and your manual JDBC went OK, you
can manually commit the UserTransaction at that time. This is 5.1
talk. For 6.0, with @PC, this may be even easier...
Joe
Patrick Shen wrote:
>
But if I do that, then they would not be in the same transaction anymore.
Is there any way to use JDBC with CMP Entity bean in the same transaction?
Patrick
"L'artiste" <[email protected]> wrote in message
news:[email protected]...
Are you calling all the CMP create in the session Bean ? If so, beforeyou
make the JDBC call from the session bean, the CMP in 2. should commit. Try
to set its attribute to TX_REQUIRES_NEW. This way, the calling client will
block until this transaction is done (committed) before the execution
continues. There might be some overhead involved in doing so if you are
anticipating a lot of users.
"Patrick Shen" <[email protected]> wrote in message
news:[email protected]...
What I am trying to do is:
In a Session bean method -
1. create a new CMP entity bean (a new row in DB table)
2. create another new CMP entity bean that uses previous bean as foreignkey
3. use JDBC to update the row just created
And all these 3 calls have to be in one transaction.
Thanks,
Patrick
"L'artiste" <[email protected]> wrote in message
news:[email protected]...
Can you give a little bit more information?
Do you have methods in your session bean that creates this CMP entitybeans?
It looks like
you might wanna try to change the isolation level to
TRANSACTION_READ_COMITTED
to preven dirty_read.
"Patrick Shen" <[email protected]> wrote in message
news:[email protected]...
I am trying to use direct JDBC call with CMP entity bean within a
session
bean method that requires transaction. The problem is that it
appears
these
are not in the same transaction. When I use the JDBC call, the CMP
entity
bean update to the DB has not been committed yet.
We are using Weblogic 5.1 SP6. The DB is Oracle.
What I do for the JDBC is get a new connection from the pool usingweblogic
jdbc pool driver.
Any help would be appreciated.
Patrick
PS: Folks: BEA WebLogic is expanding rapidly, with both entry and advanced positions
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Re: Using CMP Entity Beans in Business Logic

One thing that you need to answer here is
"In the queries for the subsequent tables, in the where clause will the fields be the same and is it that only their values change?"
In the above is true I'd suggest going for a CMP as you save a lot of coding and transaction management out there.
If the above is not true and even the fields in the where clause change on fly there is no way that you can go for CMP. You will have to go for BMP.
Hope this helps decide

Hi.
You might try posting this message to the weblogic.developer.interest.cmp
newsgroup.
Regards,
Michael
Pankaj wrote:
Hi,
I have made a few CMP entity beans which are mapped to single tables in
Oracle 8i.
Create and remove of a row is working fine via the entity bean.
But when i try to update a particular row it is not happening.
The steps that I am doing are :
1. call home.findByPrimaryKey(instance of the Primary key class)
2. remote.setXXX for the field to be modified.
when i invoke setXXX() method the methods are called in the following
sequence : ejbLoad() > setXXX() > ejbStore()
but the data is not getting persisted in the Data base ....in the column it
is still the same old data.
is it something to do with a commit call or some configuration issue??....
Is there any other step to be called
I am using Weblogic 6.1 Sp2
Any help will be appreciated....This is really urgent...
Thank you,
Pankaj--
Michael Young
Developer Relations Engineer
BEA Support

CMP Entity beans using local interfaces

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