The class level annotation for declaring resource jndi entries is
@Resources:
@Resources({ @Resource(name="PostgreSQL Database",
type=DataSource.class) })
Also the type attribute is a java.lang.Class object not a
java.lang.String object.
BTW it is much easier to use field injection like this:
@Stateless
public class HelloBean implements Hello {
@Resource
private DataSource dataSource;
public String sayHello() {
return "Hello from EJB world!";
}
}
This way you can avoid all the annoying boiler plate JNDI code.
-dain
On Oct 22, 2007, at 10:02 AM, satsuma wrote:
Hi,
This is not actually solved yet. When I try to compile my bean
class, I get
an error that says:
HelloBean.java:7: cannot find symbol
symbol: class Resource
@Resource(name = "PostgreSQL Database", type = "javax.sql.DataSource")
^
1 error
My source files look like this
// Remote interface
import javax.ejb.Remote;
import java.util.List;
@Remote
public interface Hello
{
public String sayHello();
}
// Bean class
import java.util.List;
import javax.ejb.Stateless;
import javax.persistence.*;
@Resource(name = "PostgreSQL Database", type = "javax.sql.DataSource")
@Stateless
public class HelloBean implements Hello
{
public String sayHello()
{
return "Hello from EJB world!";
}
}
There's no database operations yet, because I'm first trying to get it
through the compiler with the Resource annotation. The
PersistenceContext
annotation does not cause any errors.
My classpath is
.:/opt/apache-tomcat-6.0.10/lib/servlet-api.jar:
/opt/apache-tomcat-6.0.10/lib/jsp-api.jar:
/usr/share/java/postgresql-jdbc3-8.1.jar:/opt/junit/junit-4.4.jar:
/opt/openejb-3.0-beta-1/lib/geronimo-ejb_3.0_spec-1.0.jar:
/opt/openejb-3.0-beta-1/lib/openejb-client-3.0-beta-1.jar:
/opt/openejb-3.0-beta-1/lib/geronimo-jpa_3.0_spec-1.1.jar
Is there something missing?
Java is version 1.5.0_08.
satsuma wrote:
Thanks Dario, that does it!
Allthough I have no problem with the compilation part any more, but I
still can't get the database connection to work. I'll make a
thread for
the new question, to keep this thread under the current subject.
Dario Laverde wrote:
Hello Satsuma,
Add the following 2 jars to your classpath:
geronimo-ejb_3.0_spec-1.0.jar
geronimo-jpa_3.0_spec-1.1.jar
For an example (using Tomcat) check my blog entry at:
http://javanotebook.com/2007/09/28/openejb_3_and_tomcat_6.html
-Dario
Thank you Mohammad for your reply.
I can not find such a jar file from the lib directory. The only
ones
close
to that(containing 'persistence') are openjpa-
persistence-1.0.0.jar and
openjpa-persistence-jdbc-1.0.0.jar, so I added both of those to my
classpath, but that didn't solve the problem. Any more tips?
Mohammad Nour El-Din wrote:
Try including the persistence-api-XXXX.jar found in the
${openejb.home}/lib
directory .
On 10/18/07, satsuma <[EMAIL PROTECTED]> wrote:
Hi,
I have just started EJB programming and I ran into a problem,
when
trying
to
implement a simple stateless session bean that accesses
database. I
have
been following the instruction in the openEJB documentation page,
http://openejb.apache.org/databases.html
When I try to compile my class, I get an error that states
"package
javax.persistence.* does not exist" and because of this I can
not use
annotations such as @Resource or @PersistenceContext. The
@Stateless
annotation on the other hand, works as supposed(I made the
hello world
tutorial from the documentation).
I have added geronimo-ejb_3.0_spec-1.0.jar and
openejb-client-3.0-beta-1.jar
to my classpath, do I need to add something more?
Thanks.
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Thanks
- Mohammad Nour
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