Hi Jorrit,
can you provide us with a bit more code ? And what does the exception
look like in its completeness ? What reason is given that no transaction
can be started ?
Kind Regards
Werner Guttmann
On 28.05.2010 12:46, Jorrit Wortel wrote:
Sorry, it sent the mail too early....
As I said, I wrote a jdo-conf.xml file compatible with my database and I'm
now trying to make the interact.
I wrote a little main which instanciates a person and tries to put it in the
database.
This is the code trying to save a person in the database (the person object
is called single).
*try
{
db=manag.getDatabase();
db.begin();
System.out.println("On a prepare");
}
catch(Exception e)
{ e.printStackTrace(); }
this.getCastorTemplate().create(single);
try
{
db.commit();
db.close();
}
catch(Exception e)
{ e.printStackTrace(); }
*
But every time, I get the Java Exception: No transaction in progress.
But I am instanciating the database and I begin the transaction before I try
to save.........
Does anyone know a solution to that ?
Best regards,
Jorrit Wortel
2010/5/28 Jorrit Wortel<[email protected]>
Hei,
I changed my classes and almost everything is alright now.
The only problem is the database.
I wrote
2010/5/28 Lukas Lang<[email protected]>
Hey Jorrit,
the reason for your compile-time errors is the following, I guess: We are
not shipping the JPA annotations, the persistence API Jar to be more
specific, with Castor, as for example some Servlet containers have provide
it, thus it would be loaded twice (sealing violation). The simple solution
to your problem is putting the Sun persistence API (aka JPA annotations) on
the classpath. Ether by doing so manually or adding it as a Maven dependency
in case you are using Maven. You can download the API from [1].
Good luck!
Regards,
Lukas
[1]
http://mvnrepository.com/artifact/javax.persistence/persistence-api/1.0
Am 28.05.2010 um 10:20 schrieb Jorrit Wortel:
Hi,
First of all, thank you for your information !
But I still have a problem. It is a package problem I suppose.
I'm using the JPA annotations in a class (Person.java).
I did big imports to try making it compile:
- org.castor.jdo.jpa.info.*;
- org.castor.jdo.jpa.natures.*;
- org.castor.jdo.jpa.processors.*;
I even added these ones:
org.castor.jdo.jpa.processors.fieldprocessors.*;
org.castor.jdo.jpa.processors.classprocessors.*;
But when I'm compiling, I get the following errors :
*Person.java:8: cannot find symbol*
*symbol: class Entity*
*...@entity*
* ^*
* Person.java:9: cannot find symbol*
*symbol: class Table*
*...@table(name="person")*
* ^*
*Person.java:13: cannot find symbol*
*symbol : class Id*
*location: class Person*
* @Id*
* ^*
*Person.java:14: cannot find symbol*
*symbol : class Column*
*location: class Person*
* @Column(name="nom")*
* ^*
*Person.java:17: cannot find symbol*
*symbol : class Column*
*location: class Person*
For more comprehension, The class I try to compile is as joined.
Could someone help me ? I don't understand why it is not compiling. From
the javadoc of the fieldprocessors package, I understood that it is that
package that has to process the JPA annotations.....
Best regards,
Jorrit Wortel
2010/5/26 Lukas Lang<[email protected]>
@Column(name="age")
Hey Jorrit,
it's great to see you making progress! I'll try to give you a short and
simple answer:
Since the JDOManager is managed and instantiated by your IoC container
(Spring), this piece of code is already implemented by Castor. Just wire
everything up as in the example on the website [1].
Let us know if you can fix it!
Best,
Lukas
[1] http://castor.codehaus.org/reference/html/jpa.html#d0e8744
Am 26.05.2010 um 16:00 schrieb Jorrit Wortel:
Hello everyone,
After having (successfully) Marshalled and Unarshalled data from XML to
Java and from Java to XML, I'm now trying to make things a bit harder: I'm
adding the relational database.
That is, I'm trying to pass data from an XML (or java, doesn't matter) to
a relational database.
I did the following (conforming to the doc):
- Adding the JPA annotations to my class (Person.java)
- Implementing the CastorDaoSupport with its interface (the same way it
has been done in the doc)
- Creating a spring-config.xml
- Creating a jdo-conf.xml
But in the doc it is said I have to add this piece of code :
*JDOClassDescriptorResolver resolver = new
JDOClassDescriptorResolverImpl();
resolver.addClass(org.castor.jpa.Single.class);
// or alternatively you can add the package:
resolver.addPackage("org.castor.jpa");
InputSource jdoConfiguration = ...;
JDOManager.loadConfiguration(jdoConfiguration, null, null, resolver);
JDOManager jdoManager = JDOManager.createInstance("jpa-extensions");
*
The only point is: where do I have to add it ???
It seems to be Java code but in wich class file do I have to put it ?
If anyone could help me, that would be very appreciated !
Best regards,
Jorrit Wortel
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