How set diff. timeouts for entity beans?

How do i set diff. timeouts for diff. entity beans? Is it in the ejb-jar.xml file? Is this refreshed every time it is accesses?

Hi there,
Although not familiar with all of the App servers on the market, I'd say that you are unlikely to find a timeout value for Entity Beans. Passivation of Entity beans is normally a function of the commit options supported by a specific App server. For example, with Commit Option C an entity bean instance should always be returned to the instance pool after a transaction has completed. You can find details of the various commit options in the EJB specification which you can view or download from:
http://java.sun.com/products/ejb/docs.html
Hope this helps
Amanda
Developer Technical Support
Sun Microsystems
http://www.sun.com/developers

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How to disable cache implementation in 8.1 SP6 for entity beans

How to disable cache implementation in 8.1 SP6 for entity beans
In our production environment, we want to disable cache implementation for entity beans. We are using weblogic 8.1 SP6.
Weblogic cache implementation has been causing many cachefull exceptions so we want that it fetches the data from database everytime instead of cache.

Check the "max-beans-in-cache" setting in your weblogic-ejb-jar.xml. The cache full exception, means that a new bean could not be created because of this cache being full.
Nothing to do with fetching from the database directly.
If you really want direct fetches then do not use beans at all. Consider using direct JDCB/SQL calls (without a entity bean) to fetch huge data.
Let's again review your application based on the below explanation before making a decision on which configuration change to perform:
If you truly have many ejbs simultaneously enrolled in transactions, then yes, the cache must be big enough to hold all the instances.
Your cache must have a max size large enough to handle your peak simultaneous transaction load.
Also, try to ask the following query to your application developer. Does every user actually have to have more than one bean in the cache ? Are many of these values read-only reference values that are not updated ?
SOLUTION CHOICE:
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Arun

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Hi all,
Does the 2-phase commit capability in WL6.X applies to entity bean?
Thanks,
Rick

Two phase commit is the mechanism that allows transactions to the managed
across different servers and databases.
yes, definitely I does apply for entity beans
"Rick Lee" <[email protected]> wrote in message
news:[email protected]..
>
Hi all,
Does the 2-phase commit capability in WL6.X applies to entity bean?
Thanks,
Rick

Set a timeout for crystal sessions while using the Windows.Forms.Viewer?

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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 :-)

Which WebLogic XDoclet Properties to set for Entity Beans

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Hi ,
Go through the following link,In that you will find the weblogic tags and will get some needfull information on this issue.
http://dev2dev.bea.com/pub/a/2002/03/243.html
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Anilkumar kari

How to set render false for OALink Bean

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How do I create an Entity Bean with unknown primary keys

Hi,
Can a good folk help me.
I am mapping an entity bean to an oracle table for the purpose of logging . I do not need a primary key contraint on this table. How do I specify in my entity bean file descriptor not to use any field for primary key ...
I have done this so far...
in my ejb.xml file - I set....
<prim-key-class>java.lang.Object</prim-key-class>
and deleted ....
<primkey-field>...</primkey-field>
My table structure is .....
CREATE TABLE FAMS_REQUEST_LOG (
EDITEDBY VARCHAR2(20),
OLDTRANSDATE DATE,
REQUESTID VARCHAR2(30) NOT NULL,
OLDQTY NUMBER(20),
NEWQTY NUMBER(20),
NEWTRANSDATE DATE)
but I still get this error message on deploying...
[#|2006-03-01T14:30:29.250+0100|INFO|sun-appserver-pe8.1_02|javax.enterprise.system.tools.deployment|_ThreadID=19;|Total Deployment Time: 11000 msec, Total EJB Compiler Module Time: 0 msec, Portion spent EJB Compiling: 0%|#]
[#|2006-03-01T14:30:29.265+0100|SEVERE|sun-appserver-pe8.1_02|javax.enterprise.system.tools.deployment|_ThreadID=19;|Exception occured in J2EEC Phase
com.sun.enterprise.deployment.backend.IASDeploymentException: Fatal Error from EJB Compiler -- JDO74046: JDOCodeGenerator: Caught a MappingConversionException loading or creating mapping model for application 'fixassetenterpriseapp' module 'FixAssetEnterpriseApp-EJBModule': JDO71030: There is no column in table FAMS_REQUEST_LOG which can be used to support the servers implementation of unknown key classes.
at com.sun.ejb.codegen.CmpCompiler.compile(CmpCompiler.java:274)
at com.sun.ejb.codegen.IASEJBC.doCompile(IASEJBC.java:615)
at com.sun.ejb.codegen.IASEJBC.ejbc(IASEJBC.java:563)
at com.sun.enterprise.deployment.backend.EJBCompiler.preDeployApp(EJBCompiler.java:340)
at com.sun.enterprise.deployment.backend.EJBCompiler.compile(EJBCompiler.java:209)
at com.sun.enterprise.deployment.backend.AppDeployer.runEJBC(AppDeployer.java:284)
at com.sun.enterprise.deployment.backend.AppDeployer.deploy(AppDeployer.java:176)
at com.sun.enterprise.deployment.backend.AppDeployer.doRequestFinish(AppDeployer.java:107)
at com.sun.enterprise.deployment.phasing.J2EECPhase.runPhase(J2EECPhase.java:146)
at com.sun.enterprise.deployment.phasing.DeploymentPhase.executePhase(DeploymentPhase.java:71)
at com.sun.enterprise.deployment.phasing.PEDeploymentService.executePhases(PEDeploymentService.java:633)
at com.sun.enterprise.deployment.phasing.PEDeploymentService.deploy(PEDeploymentService.java:188)
at com.sun.enterprise.deployment.phasing.PEDeploymentService.deploy(PEDeploymentService.java:520)
at com.sun.enterprise.management.deploy.DeployThread.deploy(DeployThread.java:143)
at com.sun.enterprise.management.deploy.DeployThread.run(DeployThread.java:172)
|#]
Dotun

you will have to create a sequence and a trigger
CREATE SEQUENCE <SEQUENCE NAME>
INCREMENT BY 1
START WITH 1
NOCACHE
/this sequence will guarantee that each requested number is unique
the trigger will select from this sequence and insert the obtained value in the new record
CREATE OR REPLACE TRIGGER <TRIGGER NAME>
BEFORE INSERT ON <TABLE NAME>
REFERENCING NEW AS NEW OLD AS OLD
FOR EACH ROW
    BEGIN
        select
            <SEQUENCE NAME>.nextval
        into
            :NEW.<COLUMN NAME>
        from
            dual;
    END;
[/CODE]
this will always take the value from the sequence, even if you already provided a value yourself
(otherwise you will first have to test if :NEW.<column name> is null, but I wouldn't do this for a key column.
if you need the generated key back for further processing (inserting it into a child table for example), you can use the returning clause on the insert statement
see the oracle documentation for more information about sequences, triggers and the returning clause
greetings
Freek D
I am new to Oracle and need to know how to create a table that uses an automatic incrementation on a primay key for it's default. I need the uniqueness automatically managed by the DBMS.. This activity is know as setting the Column (primary key with identity) in Ms-SQL..
Your help would be appreciated greatly....
Thanks....

Re: junit test for entity beans ... ejb 3.0

I'm confused. I'm trying to test my entity bean.
I have:
- an entity bean
- a stateless session bean for accessing the entity bean (facade)
- an interface for accessing the the stateless bean
And I'm trying to write a JUnit test class to test this bean. However, I am uncertain as to how to test this (I'm new to EJB 3.0, JBoss and Eclipse).
What would the JUnit test look like? I'm confused as to whether or not I should be injecting the interface/bean/what???
I've tried several variations. I either get "NameNotFound" - not bound exceptions or Null pointer exceptions.
What would the @EJB syntax look like or how would I do it through the context?
For Example:
@EJB private TestFacade myTest; //interface to stateless bean ?
OR
InitialContext ctx = new InitialContext();
TestResultFacadeBean myTest = (TestResultFacadeBean) ctx.lookup("localTest");
I'm confused at to which method I should be using and what object I should be accessing. If I could get either one to work, I'd be happy. :)
How do I ensure my bean is deployed to the container? What do I need to do?
If anyone has a simple example or explanation as to which method I should use and how to use it, I'd be very grateful.
Thanks very much,
LisaD

OK, you need to have several layers of testing.
Layer 0. Test the entity beans are deployable (more on this later). Basically, you need to know that all your annotations work. Things to watch out for are multiple @Id fields in one class or @EmbeddedID or @IdClass in conjuction with @ManyToOne, @ManyToMany, @OneToMany, @OneToOne and fun with @JoinTable, @JoinColumn and @JoinColumns. Once you know how these are supposed to work with the spec, it's not too bad to write it correctly each time. But there are some gotchas that will break things later on.
Layer 1. Do the functions in the classes that don't depend on annotations work as expected. Typically, this is just going to be the getters and setters in your entity classes. Of course JUnit best practice says we don't bother testing functions that look like:
public T getX() {
return this.x;
or
public void setX(T x) {
this.x = x;
as there is nothing that can go wrong with them. So in that case, your level 1 tests will just be initial values specified from constructors and verifying that the non-get/set pairs work, and that the getters you have tagged @Transient work (because you've likely put some logic in them)
Layer 2. Test the session bean methods that don't require injection to work.
Layer 3. Test the session bean methods that require injection (Mock Objects). Simulate the injection for yourself, injecting Mock Objects for the entity manager. Then you can confirm that the correct methods are being called in the correct sequences, etc.
[Note this may require some skill in designing the mock. I'm working on developing my own entitymanager mock, and if it looks usefull I'll release it to the world.
Layer 4. Test the session bean methods that require injection (Real entity manager) (See Layer 0)
For this you will need an out of container persistence implementation. Currently Hibernate and Glassfish provide beta versions. You will need a different persistence.xml file that lists all the entities. You will have to use reflection to inject the entity manager(s) that you create from an entity manager factory unless you provide a constructor that takes an EntityManager as a parameter. You may need to use reflection to call any @PostConstruct method if you made it private.
Layer 5. Navigate the relationships in the objects returned from Layer 4 using a database that has been loaded with test data.
I am currently using Layers 0, 1, 2 & 4 to test my session beans and entity beans.

Do JNDI look up for entity beans from a session bean in different jars

I have a problem doing entity beans JNDI look up from a session bean which is deployed
as a separate package (session.jar) from the entity beans (entity.jar)
I believe if both session bean and entity beans are deployed into one jar and
I specify ejb-local-reference-description for session bean, it should work. However,
due to some reason, they have to be in separated packages but still in the same
container. Then question how to do JNDI lookup given entity beans only have local
interfaces?
FYI.
1 both session.jar and entity.jar are self-contained. i.e., no deployment error.
each JNDI name can be viewed from JNDI tree
2. weblogic-ejb-jar.xml for session.jar
<weblogic-ejb-jar>
<description><![CDATA[Generated by XDoclet]]></description>
<weblogic-enterprise-bean>
<ejb-name>PetstoreLogic</ejb-name>
<stateless-session-descriptor>
</stateless-session-descriptor>
<reference-descriptor>
</reference-descriptor>
<jndi-name>PetstoreLogic</jndi-name>
<local-jndi-name>PetstoreLogicLocal</local-jndi-name>
</weblogic-enterprise-bean>
</weblogic-ejb-jar>
3. weblogic-ejb-jar.xml (code snip) for entity.jar
<weblogic-enterprise-bean>
<ejb-name>Account</ejb-name>
<entity-descriptor>
<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>
</entity-descriptor>
<reference-descriptor>
</reference-descriptor>
<local-jndi-name>net.sourceforge.cpetstore/AccountLocalHome</local-jndi-name>
</weblogic-enterprise-bean>
4. if I do
accountLocalHome = (AccountLocalHome) ic.lookup("net/sourceforge/cpetstore/AccountLocalHome");
get error like:
javax.naming.LinkException: . Root exception is javax.naming.NameNotFoundException:
While trying to look up /app/ejb/net.sourceforge.cpetstore-entity.jar#Account/local-home
in /app/ejb/cpetstore-ejb.jar#PetstoreLogic.; remaining name '/app/ejb/net/sourceforge/cpetstore-entity/jar#Account/local-home'
     at weblogic.jndi.internal.BasicNamingNode.newNameNotFoundException(BasicNamingNode.java:869)
     at weblogic.jndi.internal.ApplicationNamingNode.lookup(ApplicationNamingNode.java:150)
     at weblogic.jndi.internal.WLContextImpl.lookup(WLContextImpl.java:338)

In weblogic-ejb-jar.xml use jndi-name instead of local-jndi-name in reference-descriptor
element.
"Qiming He" <[email protected]> wrote:
>
I have a problem doing entity beans JNDI look up from a session bean
which is deployed
as a separate package (session.jar) from the entity beans (entity.jar)
I believe if both session bean and entity beans are deployed into one
jar and
I specify ejb-local-reference-description for session bean, it should
work. However,
due to some reason, they have to be in separated packages but still in
the same
container. Then question how to do JNDI lookup given entity beans only
have local
interfaces?
FYI.
1 both session.jar and entity.jar are self-contained. i.e., no deployment
error.
each JNDI name can be viewed from JNDI tree
2. weblogic-ejb-jar.xml for session.jar
<weblogic-ejb-jar>
<description><![CDATA[Generated by XDoclet]]></description>
<weblogic-enterprise-bean>
<ejb-name>PetstoreLogic</ejb-name>
<stateless-session-descriptor>
</stateless-session-descriptor>
<reference-descriptor>
</reference-descriptor>
<jndi-name>PetstoreLogic</jndi-name>
<local-jndi-name>PetstoreLogicLocal</local-jndi-name>
</weblogic-enterprise-bean>
</weblogic-ejb-jar>
3. weblogic-ejb-jar.xml (code snip) for entity.jar
<weblogic-enterprise-bean>
<ejb-name>Account</ejb-name>
<entity-descriptor>
<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>
</entity-descriptor>
<reference-descriptor>
</reference-descriptor>
<local-jndi-name>net.sourceforge.cpetstore/AccountLocalHome</local-jndi-name>
</weblogic-enterprise-bean>
4. if I do
accountLocalHome = (AccountLocalHome) ic.lookup("net/sourceforge/cpetstore/AccountLocalHome");
get error like:
javax.naming.LinkException: . Root exception is javax.naming.NameNotFoundException:
While trying to look up /app/ejb/net.sourceforge.cpetstore-entity.jar#Account/local-home
in /app/ejb/cpetstore-ejb.jar#PetstoreLogic.; remaining name '/app/ejb/net/sourceforge/cpetstore-entity/jar#Account/local-home'
     at weblogic.jndi.internal.BasicNamingNode.newNameNotFoundException(BasicNamingNode.java:869)
     at weblogic.jndi.internal.ApplicationNamingNode.lookup(ApplicationNamingNode.java:150)
     at weblogic.jndi.internal.WLContextImpl.lookup(WLContextImpl.java:338)

Set Command Timeout For SQL Server

Hello,
How do you set the command timeout for the 'open' statement? I am running a Database via SQL Server and I tried the dialog box timeout statement (the check box on the advanced tab) and simply get an error. The manual shows a 'step.commandtimeout' but how is it implemented?
Thanks,
Kevin

Kevin -
I looked at the internal implementation of the CVI SQL Toolkit. The toolkit function that the step type uses is DBNewSQLStatement. Internally to the toolkit the function opens a recordset instead of a command object. The command timeout attribute is only available on a command object and not on a recordset object, so as implemented inside the toolkit the error is appropriate. I think the toolkit could have used a command object to create the recordset object and this would allow the toolkit to let you set the timeout attribute. Unfortuneately this is not the way it was done.
For the future I may investigate to see if there is a way to bypass this limitation by using different toolkit functions, but I am not sure if there a
re any side effects.
Scott Richardson (NI)
Scott Richardson
National Instruments

IsDirty or isModified flag for Entity Beans

I've been reading a lot of conflicting information on the use of a isModified boolean in Entity Beans. Is creating a modified boolean recommended for BMPs? Or CMPs? Or both? I am doing a BMP, and wondering if it will really buy me much performance-wise to add this logic to my ejbStore() method. Thoughts?
Thanks,
Ceily Turner

Greetings,
I've been reading a lot of conflicting information on
the use of a isModified boolean in Entity Beans. IsAre you sure all this information was presented in the same contexts? I'm guesing the apparent conflict was only perceptual and without regard for BMP in one case and CMP in [the /an]other...
creating a modified boolean recommended for BMPs? OrDefinitely! The container will call your bean's ejbStore method (sometime) after a call to its business method(s) to ensure its state is synchronized back to the resource. However, in a BMP bean, the container has no way of knowing whether the business method(s) actually modified your bean's state, making the call to ejbStore a "blind call". Additionally, business method calls are not the only triggers to calling ejbStore - transaction COMMIT (regardless if your bean was an active participant in the transaction), and passivation being among them, as well as "at any time within the container's discretion". Though, precisely when and how often the spec. leaves to the "vendor's disrection". With all these factors at play, "blindly" hitting the resource is a sure-fire way to degrade the performance of your beans and, consequently, the application(s) which they are a part. Make your synchronization code "smart" - use a 'dirty flag'.
CMPs? Or both? I am doing a BMP, and wondering if itIn CMP, the container has more direct knowledge of the bean's state fields and, therefore, should know whether an actual update to the resource is needed - this is especially true for EJB 2.0. Of course, this depends on the vendor's implementation (coders) to be "smart" on the bean coder's behalf. In any event, the container has absolute control over bean synchronization, and ejbStore is relegated to being a pre-processor, in CMP, so using a 'dirty flag' here will gain you absolutely nothing!
will really buy me much performance-wise to add this
logic to my ejbStore() method. Thoughts?Refer back to the above. :)
Thanks,
Ceily TurnerRegards,
Tony "Vee Schade" Cook

Help needed for entity bean

i have this entity bean tat creates a new row in a mysql database... and using mysql query browser i see the record... but when using the bean to retrieve, it gives finderexception... i have to undeploy + redeploy to be able to retrieve the record... y is tat so?
how can i solve this..? i'm using jboss.

some parts of my code is listed as below...
private static final String insertStatement = "INSERT INTO cards (cardid, imageid, musicid, message, createdby, recipientEmail, createddate) VALUES (?, ?, ?, ?, ?, ?, ?)";
private static final String updateStatement = "UPDATE cards SET imageid=?, musicId=?, message=?, createdby=?, recipientEmail=?, createddate=? WHERE cardid=?";
private static final String deleteStatement = "DELETE FROM cards WHERE cardid=?";
private static final String findByPKStatement = "SELECT imageid, musicid, message, createdby, recipientEmail, createddate FROM cards WHERE cardid = ?";
public String ejbCreate(String cardID, String imageID, String musicID, String message, String createdBy, String recipientEmail, java.sql.Date createdTime) throws CreateException {
try {
getDatabaseConnection();
ps = connection.prepareStatement(insertStatement);
ps.setString(1, cardID);
ps.setString(2, imageID);
ps.setString(3, musicID);
ps.setString(4, message);
ps.setString(5, createdBy);
ps.setString(6, recipientEmail);
ps.setDate(7, createdTime);
if (ps.executeUpdate() != 1) {
throw new CreateException("Failed to insert new record");
} catch (SQLException e) {
throw new CreateException(e.getMessage());
} catch (Exception e) {
} finally {
try {
ps.close();
connection.close();
} catch (Exception e) { }
return cardID;
public String ejbFindByPrimaryKey(String cardID) throws FinderException {
try {
getDatabaseConnection();
ps = connection.prepareStatement(findByPKStatement);
ps.setString(1, cardID);
ps.executeQuery();
ResultSet rs = ps.getResultSet();
if (rs.next()) {
this.cardID = cardID;
imageID = new String(rs.getString(1));
musicID = new String(rs.getString(2));
message = new String(rs.getString(3));
createdBy = new String(rs.getString(4));
recipientEmail = new String(rs.getString(5));
createdTime = rs.getDate(6);
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throw new FinderException("Failed to select this Primary Key");
} catch (SQLException e) {
throw new FinderException(e.getMessage());
} catch (Exception e) {
} finally {
try {
ps.close();
connection.close();
} catch (Exception e) { }
return cardID;
private void getDatabaseConnection() throws NamingException, SQLException {
InitialContext ctx = new InitialContext();
String connectionURL = "jdbc:mysql://localhost:3306/card";
try {
Class.forName("com.mysql.jdbc.Driver").newInstance();
connection = DriverManager.getConnection(connectionURL, "root", "123");
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How set diff. timeouts for entity beans?

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