managed persistence. It is the default.
the fields (field access). But it doesn't seem to be detecting when the
> Hi Jay,
> I have not explicitly declared transaction configuration. So, the server
> should run the the method with "TxRequired". The same info has been logged
> to geronimo.log.
>
> I am attaching the apps 1) EJB app 2) WEB app to test ejb app. You may have
> a look at the apps. The following are the steps to recreate the problem.
>
> 1. Create BankDB database in the embedded derby db server using DB manager
> portlet.
> 2. Create Account table using "create table account (accountnumber integer,
> ownername varchar(50), balance integer, version integer)"
> 3. Deploy the EJB app
> 4. Deploy the WEB app
> 5. Hit the URL in browser window -->
>
http://localhost:8080/AccountCreateWEB/Test?accNo=1>
> We could see that servlet is calling deposit(accountnumber ,100) method but
> the value is not being updated in the database.
>
> Thanks
> Phani
>
> On Wed, May 7, 2008 at 2:56 PM, Jay D. McHugh <
jaydmchugh@...> wrote:
>
>> Phani,
>>
>> Are you specifying that you want to use container managed persistence in
>> your BankBean?
>>
>> The way to do this with an annotation would be:
>> @TransactionManagement(TransactionManagementType.CONTAINER)
>>
>> If you are specifying container managed persistence then you wouldn't need
>> to worry about starting and committing your transaction - and the code for
>> your 'deposit' method would work. Actually, you don't even need the
>> 'manager.merge(account)'.
>>
>> But, if you are not specifying container managed persistence - then you
>> need to get a UserTransaction and begin/commit it to have your account
>> balance change in your database.
>>
>> Hope that helps,
>>
>> Jay
>>
>>
>> Phani Madgula wrote:
>>
>>> Hi,
>>>
>>> I got past the above error but experiencing some strange results as
>>> follows.
>>>
>>> In the BankBean.java, I have the following method.
>>>
>>> *********
>>> public void deposit(int accountNumber, int amount) {
>>> Account account = manager.find(Account.class, accountNumber);
>>> account.balance += amount;
>>> System.out.println("New balance="+account.balance);
>>> System.out.println("Merging the account");
>>> manager.merge(account);
>>> }
>>> *********
>>>
>>> I have the Account.java as follows.
>>> **********************************************************************
>>> package sample.jpa;
>>>
>>> import java.io.Serializable;
>>>
>>> import javax.persistence.Entity;
>>> import javax.persistence.Id;
>>> import javax.persistence.NamedQuery;
>>> import javax.persistence.PostLoad;
>>> import javax.persistence.PostUpdate;
>>> import javax.persistence.PrePersist;
>>> import javax.persistence.PreUpdate;
>>> import javax.persistence.Version;
>>> import javax.persistence.Table;
>>>
>>> /**
>>> * This demo entity represents a Bank Account.
>>> * <p>
>>> * The entity is not a remote object and can only be accessed locally by
>>> * clients. However, it is made serializable so that instances can be
>>> passed
>>> by
>>> * value to remote clients for local inspection.
>>> * <p>
>>> * Access to persistent state is by direct field access.
>>> */
>>> @Entity
>>> @Table(name = "ACCOUNT")
>>> @NamedQuery(name="findThem", query="SELECT a FROM Account a")
>>> public class Account implements Serializable {
>>>
>>> /** The account number is the primary key for the persistent object
>>> */
>>> @Id
>>> public int accountNumber;
>>>
>>> public String ownerName;
>>>
>>> public int balance;
>>>
>>> @Version
>>> public int version;
>>>
>>> /**
>>> * Entity beans must have a public no-arg constructor
>>> */
>>> public Account() {
>>> // our own primary key generation, workaround for the
>>> // time being as persistence does not support
>>> // auto-generation
>>> accountNumber = (int) System.nanoTime();
>>> }
>>>
>>> public String toString() {
>>> return "Acc.# " + accountNumber + ", owner" + ownerName + ",
>>> balance: " + balance
>>> + " $";
>>> }
>>>
>>> @PrePersist
>>> void prepersist() {
>>> System.out.println("pre persist!!");
>>> }
>>>
>>> @PreUpdate
>>> void preupdate() {
>>> System.out.println("pre update!!");
>>> }
>>>
>>> @PostUpdate
>>> void postupdate() {
>>> System.out.println("post update!!");
>>> }
>>>
>>> @PostLoad
>>> void postload() {
>>> System.out.println("post load!!");
>>> }
>>>
>>> }
>>> **********************************************************************
>>>
>>> In the servlet I have the following code
>>>
>>> **********************************************************************
>>>
>>> bank = (Bank)ctx.lookup("BankBeanRemote");
>>> account =
>>> bank.findAccount(Integer.parseInt(request.getParameter("accNo")));
>>>
>>> out.println("account Number =
>>> "+account.accountNumber+"<br/>");
>>> out.println("ownerName = "+account.ownerName+"<br/>");
>>> out.println("balance = "+account.balance+"<br/>");
>>> out.println("version = "+account.version+"<br/>");
>>>
>>>
>>> accountNumber = account.accountNumber;
>>>
>>> out.println("Depositing Rs.100"+"<br/>");
>>>
>>> bank.deposit(accountNumber,100);
>>>
>>> **********************************************************************
>>>
>>> When I run the servlet, it is able to load the account values from the
>>> "account =
>>> bank.findAccount(Integer.parseInt(request.getParameter("accNo")));"
>>> statement. However, the "bank.deposit(accountNumber,100);" is not
>>> updating
>>> the "balance" field.
>>>
>>> What is the problem?? I have the following persistence.xml file
>>>
>>> *****************************************************************************************************
>>> <?xml version="1.0" encoding="UTF-8"?>
>>> <persistence xmlns="
http://java.sun.com/xml/ns/persistence"
>>> xmlns:xsi="
http://www.w3.org/2001/XMLSchema-instance"
>>> version="1.0"
>>> xsi:schemaLocation="
>>>
http://java.sun.com/xml/ns/persistence>>>
http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd">
>>> <persistence-unit name="BankPU">
>>> <description>Bank example</description>
>>>
>>>
>>> <provider>org.apache.openjpa.persistence.PersistenceProviderImpl</provider>
>>> <class>sample.jpa.Account</class>
>>> <properties>
>>> <property name="openjpa.ConnectionURL"
>>> value="jdbc:derby:BankDB"
>>> />
>>> <property name="openjpa.ConnectionDriverName"
>>> value="org.apache.derby.jdbc.EmbeddedDriver" />
>>> <property name="ConnectionUserName" value="app" />
>>> <property name="openjpa.jdbc.SynchronizeMappings"
>>> value="false"
>>> />
>>> </properties>
>>> </persistence-unit>
>>> <!--
>>> <jta-data-source>PhoneBookPool</jta-data-source>
>>> <non-jta-data-source>PhoneBookPool</non-jta-data-source>
>>> -->
>>> </persistence>
>>>
>>>
>>> **********************************************************************************************************
>>>
>>> On Wed, May 7, 2008 at 10:52 AM, Phani Madgula <
>>>
phanibalaji.madgula@...> wrote:
>>>
>>> Hi,
>>>> I have an EJB application using JPA and a web application looking up
>>>> ejbs
>>>> in EJB application. I am able to deploy both the applications on AG2.1
>>>> server. But when I hit the servlet, I get the following error in the
>>>> console.
>>>> *****
>>>> Message: The bean encountered a non-application exception.; nested
>>>> exception is:
>>>>
>>>> <openjpa-1.0.1-r420667:592145 fatal user error>
>>>> org.apache.openjpa.persi
>>>> stence.ArgumentException: Could not locate metadata for the class
>>>> using
>>>> alias "A
>>>> ccount". This could mean that the OpenJPA enhancer or load-time weaver
>>>> was
>>>> not r
>>>> un on the type whose alias is "Account". Registered alias mappings:
>>>> "{Account=nu
>>>> ll}"
>>>> *****
>>>>
>>>> The ejb app is attached to mail. Any suggestions on what is missing
>>>> here??
>>>>
>>>> Thanks
>>>> Phani
>>>>
>>>>
>
JPA-APP1.jar (15K)