Chris Miles

Good Afternoon,

I am using Hibernate behing JPA and have the following problem.

My application pulls an entity out using the find operation of the
EntityManager, and then somewhere else in my application I want to pull
the same Entity out again cleanly with the current database state rather
than the dirty version but any time I try I get the same dirty data.

I have tried to detach the dirty version and then fetch the Entity again
but it is still same.

I have also tried the CacheRetrieveMode.BYPASS hint on the fetch in case
it is a caching problem.

How can I fetch a clean instance of my Entity side by side with the dirty
version?

Thanks

Chris

Got it working. At last! I can sleep now!

Thank you very much.

Thanks again.

Maybe your right and it is my GridLayout that is the problem.

Using your example. What if I wanted to add three colours filling one column, and three colours filling the next column?

My code is identical to yours, except I am creating GridManager with 2 columns.

Chris

Pete,

Thanks

I am now using.

g2.fillRect(0, 0, this.getWidth(), this.getHeight());

Thank you, It now honours the X and Y values as expected, however, it does not seem to honour the widths in the grid layout.

I do

this.setLayout(new GridLayout(10, 2));

and

for (int i = 0; i < 10; i++) { this.getContentPane().add(new RectComponent(Color.red)); this.getContentPane().add(new RectComponent(Color.blue)); }

I would expect it to add a red rectangle into the first column, and then a blue rectangle into the second column.

However it is just adding 1 red rectangle taking up the full width of the frame, and then a blue underneath taking up the full width of the frame.

Chris

Hi.

I have created a JComponent which I just want to fill with a colour. Very simple.

I have a JFrame with a GridLayout with 1 column and 5 rows.

My JComponent code is very simple, and just calls fillRect.

I add 5 of these components to the JFrame's content panel.

public void paintComponent(Graphics g) { Graphics2D g2 = (Graphics2D) g; g2.setColor(this.color); g2.fillRect(this.getX(), this.getY(), this.getWidth(), this.getHeight()); }

When I run the code the above method is invoked for all 5 components. Debugging shows that X, Width and Height are all the same which is what I expect, and the Y value is changing each time, which again is expected as there is only one column of fixed rows.

When painting is done however, I can only see one rectangle drawn.

Thanks

Chris

Hi.

I have upgraded using the 1.6 method of doing compile time annotations, and I am runing into a problem trying to build a jar containing my annotations processor with maven.

I get the error from maven (mvn package)

[INFO] Compilation failure
error: Bad service configuration file, or exception thrown while constructing Processor object: javax.annotation.processing.Processor: Provider annotations.processing.processors.CodeAnnotationProcessor not found

I have the following directory structure

src
--main
----java
------annotations
--------processing
----------processors
------------CodeAnnotationProcessor.java
----------annotations
------------CodeAnnotation.java
----resources
------META-INF
--------service
----------javax.annotation.processing.Processor

I build this with the following with maven

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>mygroup</groupId> <artifactId>annotations-processor</artifactId> <packaging>jar</packaging> <version>1.0.0</version> <name>annotations-processor</name> <url>http://maven.apache.org</url> <dependencies> <dependency> <groupId>com.sun</groupId> <artifactId>tools</artifactId> <version>1.4.2</version> <scope>system</scope> <systemPath>C:/Java/jdk1.6.0_10/lib/tools.jar</systemPath> </dependency> </dependencies> <build> <plugins> <plugin> <artifactId>maven-compiler-plugin</artifactId> <configuration> <source>1.6</source> <target>1.6</target> </configuration> </plugin> </plugins> </build> </project>

The javax.annotation.processing.Processor file contains

annotations.processing.processors.CodeAnnotationProcessor

Any my

package annotations.processing.processors; import javax.annotation.processing.AbstractProcessor; import javax.annotation.processing.RoundEnvironment; import javax.annotation.processing.SupportedSourceVersion; import javax.annotation.processing.SupportedAnnotationTypes; import javax.lang.model.element.TypeElement; import javax.lang.model.SourceVersion; import java.util.Set; @SupportedAnnotationTypes( "annotations.processing.annotations.CodeAnnotation") @SupportedSourceVersion(SourceVersion.RELEASE_6) public class CodeAnnotationProcessor extends AbstractProcessor { public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) { return true; } }

And my CodeAnnotation is as follows

package annotations.processing.annotations; import java.lang.annotation.Target; import java.lang.annotation.ElementType; import java.lang.annotation.Retention; import java.lang.annotation.RetentionPolicy; @Target(ElementType.TYPE) @Retention(RetentionPolicy.SOURCE) public @interface CodeAnnotation { }

Thank you.

My application is built as an EAR containing a WAR and a EJB JAR.

The JAR is deployed with ejb-jar.xml and each of my EJBs are deployed with:

<display-name>BlahEJB</display-name>
<ejb-name>BlahEJB</ejb-name>

My WAR has a web.xml with the following for each EJB:

<ejb-local-ref>
<ejb-ref-name>BlahEJB</ejb-ref-name>
<ejb-ref-type>Session</ejb-ref-type>
<local-home>BlahHomeLocal</local-home>
<local>BlahLocal</local>
</ejb-local-ref>

Within my web application I can only lookup the bean with

java:comp/env/BlahEJB

Now, I want to be able to lookup this bean from another bean.

java:comp/env/BlahEJB - does not work
BlahEJB - does not work

And about 20 other combinations does not work either.

I have tried an orion-ejb-xml configuration

with the following

<session-deployment
name="BlahEJB"
location="BlahEJB"/>

and tried every combination as well with no luck.

What am I missing here?

thanks very much

Chris

I have just started using JBoss as I was having probs with Sun app server.

I just deployed one ten minutes ago successfully.

Jar file with the stucture

root | | ----------------------------- | | cakeinabox META-INF | | beans ---------------- | | | AccountEJB jboss.xml ejb-jar.xml | --------------------------------- | | | Account.class AccountHome.class AccountBean.class

which I simply drag and dropped into JBoss's deployment directory. Bingo.

still no joy with this.... It all seems to deploy fine... why cant I use the bean in my client.. I have trawled the docs for hours with no joy

just to expand... I have changed something (not sure what)

and I am now getting the following error.

23-Jun-2006 23:31:21 com.sun.corba.ee.spi.logging.LogWrapperBase doLog INFO: "IOP00710299: (INTERNAL) Successfully created IIOP listener on the specified host/port: all interfaces/1112" javax.naming.NameNotFoundException: AccountBean not found at com.sun.enterprise.naming.TransientContext.doLookup(TransientContext.java:185) at com.sun.enterprise.naming.TransientContext.lookup(TransientContext.java:157) at com.sun.enterprise.naming.SerialContextProviderImpl.lookup(SerialContextProviderImpl.java:101) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)AccountBean not found at java.lang.reflect.Method.invoke(Method.java:585) at com.sun.corba.ee.impl.presentation.rmi.ReflectiveTie._invoke(ReflectiveTie.java:123) at com.sun.corba.ee.impl.protocol.CorbaServerRequestDispatcherImpl.dispatchToServant(CorbaServerRequestDispatcherImpl.java:648) at com.sun.corba.ee.impl.protocol.CorbaServerRequestDispatcherImpl.dispatch(CorbaServerRequestDispatcherImpl.java:192) at com.sun.corba.ee.impl.protocol.CorbaMessageMediatorImpl.handleRequestRequest(CorbaMessageMediatorImpl.java:1709) at com.sun.corba.ee.impl.protocol.CorbaMessageMediatorImpl.handleRequest(CorbaMessageMediatorImpl.java:1569) at com.sun.corba.ee.impl.protocol.CorbaMessageMediatorImpl.handleInput(CorbaMessageMediatorImpl.java:951) at com.sun.corba.ee.impl.protocol.giopmsgheaders.RequestMessage_1_2.callback(RequestMessage_1_2.java:181) at com.sun.corba.ee.impl.protocol.CorbaMessageMediatorImpl.handleRequest(CorbaMessageMediatorImpl.java:721) at com.sun.corba.ee.impl.transport.SocketOrChannelConnectionImpl.dispatch(SocketOrChannelConnectionImpl.java:469) at com.sun.corba.ee.impl.transport.SocketOrChannelConnectionImpl.doWork(SocketOrChannelConnectionImpl.java:1258) at com.sun.corba.ee.impl.orbutil.threadpool.ThreadPoolImpl$WorkerThread.run(ThreadPoolImpl.java:409)

Important thing I see is "AccountBean not found"

I have created a test EJB and deployed it to Sun AppServer 8.2 with the name "AccountBean" - It was confirmed as deployed.

I have set JBuilder 6 to use the JDK in the AppServer directory and created a test application which failed with the error following message:

java.lang.VerifyError: (class: cakeinaboxbeans/AccountBeanTestClient1, method: getClosedDate signature: ()Ljava/util/Date :wink: Incompatible object argument for function call Exception in thread "main"

Here are the EJB files.

package AccountEJB; import java.util.Collection; import java.rmi.RemoteException; import javax.ejb.*; public interface AccountHome extends EJBHome { public Account create(int id, double credit , double discount, java.util.Date openedDate, java.util.Date closedDate) throws CreateException, RemoteException; public Collection findAll() throws FinderException, RemoteException; public Account findByPrimaryKey(int primaryKey) throws FinderException, RemoteException; }

package AccountEJB; import javax.ejb.EJBObject; import java.rmi.RemoteException; public interface Account extends EJBObject { public void setId(int id); public void setCredit(double credit); public void setDiscount(double discount); public void setOpenedDate(java.util.Date openedDate); public void setClosedDate(java.util.Date closedDate); public int getId(); public double getCredit(); public double getDiscount(); public java.util.Date getOpenedDate(); public java.util.Date getClosedDate(); }

package AccountEJB; import javax.ejb.*; import java.rmi.RemoteException; import java.sql.*; import javax.sql.*; import java.util.*; import javax.naming.*; public class AccountBean implements EntityBean { private int m_id; private double m_credit; private double m_discount; private java.util.Date m_openedDate; private java.util.Date m_closedDate; private Connection con; private EntityContext m_context; public AccountBean() { } /////////////////////// // container methods // /////////////////////// public int ejbCreate(int id, double credit , double discount, java.util.Date openedDate, java.util.Date closedDate) throws CreateException { try { insertRow(id, credit, discount, openedDate, closedDate); } catch (Exception ex) { throw new EJBException("ejbRemove: " + ex.getMessage()); } this.m_id = id; this.m_credit = credit; this.m_discount = discount; this.m_openedDate = openedDate; this.m_openedDate = closedDate; return id; } public void ejbPostCreate (int id, float credit , float discount, java.util.Date openedDate, java.util.Date closedDate) throws CreateException { } public void ejbRemove() { try { deleteRow(m_id); } catch (Exception ex) { throw new EJBException("ejbRemove: " + ex.getMessage()); } } public void setEntityContext(EntityContext context) { this.m_context = context; try { makeConnection(); } catch (Exception ex) { throw new EJBException("Unable to connect to database. " + ex.getMessage()); } } public void unsetEntityContext() { m_context = null; } public void ejbActivate() { this.m_id = ((Integer)m_context.getPrimaryKey()).intValue(); } public void ejbPassivate() { this.m_id = 0; this.m_credit = 0; this.m_discount = 0; this.m_openedDate = null; this.m_openedDate = null; try { con.close(); } catch (SQLException ex) { throw new EJBException("unsetEntityContext: " + ex.getMessage()); } } public void ejbLoad() { // load instance variables from database try { loadRow(); } catch (Exception ex) { throw new EJBException("ejbLoad: " + ex.getMessage()); } } public void ejbStore() { // save instance variables to database try { storeRow(); } catch (Exception ex) { throw new EJBException("ejbStore: " + ex.getMessage()); } } public Collection ejbFindAll() throws FinderException { Collection result; try { result = selectAll(); } catch (Exception ex) { throw new EJBException("ejbFindByPrimaryKey: " + ex.getMessage()); } if(result.isEmpty()==false) { return result; } else { throw new ObjectNotFoundException("No rows found."); } } public int ejbFindByPrimaryKey(int primaryKey) throws FinderException { boolean result; try { result = selectByPrimaryKey(primaryKey); } catch (Exception ex) { throw new EJBException("ejbFindByPrimaryKey: " + ex.getMessage()); } if(result==true) { return primaryKey; } else { throw new ObjectNotFoundException("Row for id " + primaryKey + " not found."); } } ////////////////////// // business methods // ////////////////////// // set methods public void setId(int id) { m_id = id; } public void setCredit(double credit) { m_credit = credit; } public void setDiscount(double discount) { m_discount = discount; } public void setOpenedDate(java.util.Date openedDate) { m_openedDate = openedDate; } public void setClosedDate(java.util.Date closedDate) { m_closedDate = closedDate; } //get methods public int getId() { return m_id; } public double getCredit() { return m_credit; } public double getDiscount() { return m_discount; } public java.util.Date getOpenedDate() { return m_openedDate; } public java.util.Date getClosedDate() { return m_closedDate; } /////////////////////// // Database Routines // /////////////////////// private void makeConnection() throws NamingException, SQLException { try { Class.forName("sun.jdbc.odbc.JdbcOdbcDriver"); } catch(ClassNotFoundException e) { System.err.println("JdbcOdbc Bridge Driver not found!"); } con = DriverManager.getConnection("jdbc :-o dbc:cakeinabox"); } private boolean selectByPrimaryKey(int primaryKey) throws SQLException { String selectStatement = "select id from Account where id = ? "; PreparedStatement prepStmt = con.prepareStatement(selectStatement); prepStmt.setInt(1, primaryKey); ResultSet rs = prepStmt.executeQuery(); boolean result = rs.next(); prepStmt.close(); return result; } private Collection selectAll() throws SQLException { String selectStatement = "select id from account"; PreparedStatement prepStmt = con.prepareStatement(selectStatement); ResultSet rs = prepStmt.executeQuery(); ArrayList a = new ArrayList(); while (rs.next()) { a.add(new Integer(rs.getInt(1))); } prepStmt.close(); return a; } private void insertRow (int id, double credit, double discount, java.util.Date openedDate, java.util.Date closedDate) throws SQLException { String insertStatement = "insert into Account values ( ? , ? , ? , ? , ?)"; PreparedStatement prepStmt = con.prepareStatement(insertStatement); prepStmt.setInt(1, id); prepStmt.setDouble(2, credit); prepStmt.setDouble(3, discount); prepStmt.setDate(4, new java.sql.Date(openedDate.getTime())); prepStmt.setDate(5, new java.sql.Date(closedDate.getTime())); prepStmt.executeUpdate(); prepStmt.close(); } private void deleteRow(int id) throws SQLException { String deleteStatement = "delete from Account where id = ? "; PreparedStatement prepStmt = con.prepareStatement(deleteStatement); prepStmt.setInt(1, id); prepStmt.executeUpdate(); prepStmt.close(); } private void loadRow() throws SQLException { String selectStatement = "select * from Account where id = ? "; PreparedStatement prepStmt = con.prepareStatement(selectStatement); prepStmt.setInt(1, this.m_id); ResultSet rs = prepStmt.executeQuery(); if (rs.next()) { this.m_id = rs.getInt(1); this.m_credit = rs.getDouble(2); this.m_discount = rs.getDouble(3); this.m_openedDate = new java.util.Date(rs.getDate(4).getTime()); this.m_closedDate = new java.util.Date(rs.getDate(5).getTime()); prepStmt.close(); } else { prepStmt.close(); throw new NoSuchEntityException("Row for id " + m_id + " not found in database."); } } private void storeRow() throws SQLException { String updateStatement = "update Account set " + "credit = ? ," + "discount = ? ," + "openedDate = ? " + "closedDate = ? " + "where id = ?"; PreparedStatement prepStmt = con.prepareStatement(updateStatement); prepStmt.setInt(1, m_id); prepStmt.setDouble(2, m_credit); prepStmt.setDouble(3, m_discount); prepStmt.setDate(4, new java.sql.Date(m_openedDate.getTime())); prepStmt.setDate(5, new java.sql.Date(m_closedDate.getTime())); int rowCount = prepStmt.executeUpdate(); prepStmt.close(); if (rowCount == 0) { throw new EJBException("Storing row for id " + m_id + " failed."); } } }


And finally tghe client code.

package ejbTester; import java.util.*; import javax.naming.Context; import javax.naming.InitialContext; import javax.rmi.PortableRemoteObject; import AccountEJB.*; public class TestClient { public TestClient() { } public static void main(String[] args) { try { Context initial = new InitialContext(); Object objref = initial.lookup("AccountBean"); AccountHome home = (AccountHome)PortableRemoteObject.narrow(objref, AccountHome.class); } catch(Exception ex) { System.out.println(ex.getMessage()); ex.printStackTrace(); } } }

any help greatly apreciated...

TIA Chris

Hi thanks for the response... I do have academic qualifications but im
finding it hard to find a job (just finishing my masters just now)

After numerous job interviews it has dawned on me that industry just
doesnt hold a high regard for academic qualifications (without experience)
Yeah it may show that I am commited to studying but the actual qualifications
themself dont seem to mean squat except another stepping stone up the great
ladder. So i have took it upon myself to get my Java certification in a bid
to have something industry recognised as my friend could not get a job
for over a year with his masters degree until he gained his MCP/MSCE and
he then got a jon straight away.

What sort of recognition to the qualifications have in industry (particulary
in the UK if anyone has any experience of it)

Im just getting ready for the Java 2 1.4 exam (CX-310-035)

many thanks

Chris, Glasgow