BMP Entity should use UserTransaction ???

If I have a BMP Entity, should i use UserTransaction in the bean ??? if not , what
should i use ?
thanks :)

If you use a TXDatasource within a TX the autocommit is set to false by default.
Peter wrote:
Should I use setAutoCommit(false) ??
Rajesh Mirchandani <[email protected]> wrote:
You should not use UserTransaction in a BMP. You could set the tx attributes
in the
ejb-jar.xml file and have the container handle the transactions for you.
Look in the ejb spec (chapter on transactions) for more info.
Peter wrote:
If I have a BMP Entity, should i use UserTransaction in the bean ???if not , what
should i use ?
thanks :)--
Rajesh Mirchandani
Developer Relations Engineer
BEA Support
Rajesh Mirchandani
Developer Relations Engineer
BEA Support

Similar Messages

Using JDO under BMP entity beans

I have an entity bean that is a BMP which uses JDO under the hood. The Oc4J document says that "Bean-managed persistence entity beans manage the resource locking within the bean implementation themselves" in the advanced subject chapter. Ok can someone in oracle add an extra line eloborating on that statement ?
I am stuck in trying to pass a test that can do concurrent modify of an entity bean. I had 2 or more threads trying to modify one single BMP entity bean object concurrently. The database vendor recognizes one bean had the lock and deny locks to any other beans. Who should block the call to the database until one thread releases the lock on the object ? The developer ? J2EE container ? Database ?
J2EE tenet "Developers are shielded from concurrency and threading issues while implementing business logic" Does that still hold ??
An object Person's salary value and his benefit information are tried to be modified at the same time by different external system(salary administrator, benefit's administrator). But I dont want the user to see the lock on the object error, but instead I require a pessimistic lock on the BMP. Why does Oc4J not support pessimistic concurrency option for BMP ?

Kurien,
If you wish to bring something to the attention of the "Oracle dev team", I suggest you try Oracle's "MetaLink" Web site:
http://metalink.oracle.com
It is the official Oracle support Web site.
These forums are for the Oracle community. Oracle Corporation employees are not obliged to even visit these forums.
By the way, I am not an Oracle employee.
Good Luck,
Avi.
P.S. For your information, you may find Debu Panda's blogs of help:
http://radio.weblogs.com/0135826/

I want to set deadlock priority of a stored proc to low so that when ever any one call it from entity or command object it should use same priority

Hi,
I want to set deadlock priority of a stored proc to low so that when ever any one calls it from entity or command object it should use same priority.
some body sugested to put
set deadlockprioirty low
go
exec yourSP()
but in this case i have to change my bussiness layer.
is there any other way from database which do the task?
yours sincerley.

You can modify your stored procedures and add the code line
set deadlock_priority low
at the very beginning of the SP.
Olaf Helper
[ Blog] [ Xing] [ MVP]

Help! My database connection from BMP Entity bean dies after a while!!!

Hi all!
I posted a related post about this lately How do I use connection pooling from BMP Entity Beans in OC4J 10.1.2? but it didn't solve my problems.
I have some entity beans coded with BMP, so I handle all database stuff myself. I have set up datasources.xml like this:
    <data-source
        class="com.evermind.sql.DriverManagerDataSource"
        name="OracleDS"
        location="jdbc/OracleCoreDS"
        xa-location="jdbc/xa/OracleXADS"
        ejb-location="jdbc/OracleDS"
        connection-driver="oracle.jdbc.driver.OracleDriver"
        username="scott"
        password="tiger"
        url="jdbc:oracle:thin:@//URL TO DB:SID"
        inactivity-timeout="30"
        min-connections="10"
        max-connections="50"
    />All JNDI connection lookup is done through the ejb-location as I should. I have been through all my try {} catch {} finally {} blocks, so ensure that I close all objects after use.
After a few hours of inactivity, my program dies. I have inserted a lot of debug statements (System.out.println()), and it seems like the program hangs when it's trying to execute a PreparedStatement.
I.e. it dies when I do ps.ExecuteQuery in the code below (NOTE: to make things easier to read, I have stripped out all error handling here):
    Context ic = new InitialContext();
    DataSource ds = (DataSource)ic.lookup("jdbc/OracleDS");
    c = ds.getConnection();
    System.out.println("DEBUG: Got database connection.");
    PreparedStatement ps = c.prepareStatement("SELECT foobar FROM footable WHERE foo=?");
    System.out.println("DEBUG: Prepared SQL statement.");
    ps.setString(1,"foo");
    ResultSet rs = ps.executeQuery();
    // Close all objects (rs, ps, c) here.My database is on another physical server, so I wonder if this is caused by an unstable network, or?
Please help!
~Morten

Hi again!
Sorry for the delay, but I have been busy lately.
Anyway: Our application server is 10.1.2, so I don't think patch 4307303 is relevant here. Database server is Oracle 9.2.0.6. Everything runs on Linux (of course) ;-).
Here's a thread dump:
Full thread dump Java HotSpot(TM) Server VM (1.4.2_04-b05 mixed mode):
"ApplicationServerThread-8" prio=1 tid=0x089a9448 nid=0x5902 in Object.wait() [885e6000..885e687c]
     at java.lang.Object.wait(Native Method)
     at EDU.oswego.cs.dl.util.concurrent.SynchronousChannel.poll(SynchronousChannel.java:353)
     - locked <0x91a31e60> (a EDU.oswego.cs.dl.util.concurrent.LinkedNode)
     at EDU.oswego.cs.dl.util.concurrent.PooledExecutor.getTask(PooledExecutor.java:767)
     at com.evermind.util.ReleasableResourcePooledExecutor.myGetTask(ReleasableResourcePooledExecutor.java:151)
     at com.evermind.util.ReleasableResourcePooledExecutor.access$000(ReleasableResourcePooledExecutor.java:33)
     at com.evermind.util.ReleasableResourcePooledExecutor$MyWorker.run(ReleasableResourcePooledExecutor.java:190)
     at java.lang.Thread.run(Thread.java:534)
"AJPRequestHandler-ApplicationServerThread-7" prio=1 tid=0x08d78a58 nid=0x5902 runnable [8b2f4000..8b2f587c]
     at java.net.SocketInputStream.socketRead0(Native Method)
     at java.net.SocketInputStream.read(SocketInputStream.java:129)
     at oracle.net.ns.Packet.receive(Unknown Source)
     at oracle.net.ns.DataPacket.receive(Unknown Source)
     at oracle.net.ns.NetInputStream.getNextPacket(Unknown Source)
     at oracle.net.ns.NetInputStream.read(Unknown Source)
     at oracle.net.ns.NetInputStream.read(Unknown Source)
     at oracle.net.ns.NetInputStream.read(Unknown Source)
     at oracle.jdbc.driver.T4CMAREngine.unmarshalUB1(T4CMAREngine.java:978)
     at oracle.jdbc.driver.T4CMAREngine.unmarshalSB1(T4CMAREngine.java:950)
     at oracle.jdbc.driver.T4C8Oall.receive(T4C8Oall.java:434)
     at oracle.jdbc.driver.T4CPreparedStatement.doOall8(T4CPreparedStatement.java:181)
     at oracle.jdbc.driver.T4CPreparedStatement.execute_for_describe(T4CPreparedStatement.java:661)
     at oracle.jdbc.driver.OracleStatement.execute_maybe_describe(OracleStatement.java:959)
     at oracle.jdbc.driver.T4CPreparedStatement.execute_maybe_describe(T4CPreparedStatement.java:693)
     at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:1065)
     at oracle.jdbc.driver.OraclePreparedStatement.executeInternal(OraclePreparedStatement.java:2901)
     at oracle.jdbc.driver.OraclePreparedStatement.executeQuery(OraclePreparedStatement.java:2942)
     - locked <0x914cad08> (a oracle.jdbc.driver.T4CPreparedStatement)
     - locked <0x920256c0> (a oracle.jdbc.driver.T4CConnection)
     at com.evermind.sql.FilterPreparedStatement.executeQuery(FilterPreparedStatement.java:270)
     at com.evermind.sql.FilterPreparedStatement.executeQuery(FilterPreparedStatement.java:270)
     at com.evermind.sql.PreparedStatementBCELProxy.executeQuery(PreparedStatementBCELProxy.java:31)
     at com.brunata.servicerapport.ejb.CustomerBean.ejbCreate(Unknown Source)
     at CustomerLocalHome_EntityHomeWrapper2.create(CustomerLocalHome_EntityHomeWrapper2.java:420)
     at com.brunata.servicerapport.BeanFactory.getCustomerBean(Unknown Source)
     at com.brunata.servicerapport.CustomerOpenAction.execute(Unknown Source)
     at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:419)
     at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:224)
     at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
     at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at com.evermind.server.http.ResourceFilterChain.doFilter(ResourceFilterChain.java:65)
     at com.brunata.servicerapport.CustomerAuthorizationFilter.doFilter(Unknown Source)
     at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:649)
     at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:322)
     at com.evermind.server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:790)
     at com.evermind.server.http.AJPRequestHandler.run(AJPRequestHandler.java:208)
     at com.evermind.server.http.AJPRequestHandler.run(AJPRequestHandler.java:125)
     at com.evermind.util.ReleasableResourcePooledExecutor$MyWorker.run(ReleasableResourcePooledExecutor.java:192)
     at java.lang.Thread.run(Thread.java:534)
"Thread-23" daemon prio=1 tid=0x092ebb18 nid=0x5902 in Object.wait() [88565000..8856587c]
     at java.lang.Object.wait(Native Method)
     - waiting on <0x920000f0> (a java.util.TaskQueue)
     at java.util.TimerThread.mainLoop(Timer.java:429)
     - locked <0x920000f0> (a java.util.TaskQueue)
     at java.util.TimerThread.run(Timer.java:382)
"Thread-22" daemon prio=1 tid=0x092eb988 nid=0x5902 in Object.wait() [8dfa0000..8dfa087c]
     at java.lang.Object.wait(Native Method)
     - waiting on <0x92000188> (a java.util.TaskQueue)
     at java.util.TimerThread.mainLoop(Timer.java:429)
     - locked <0x92000188> (a java.util.TaskQueue)
     at java.util.TimerThread.run(Timer.java:382)
"AJPRequestHandler-ApplicationServerThread-6" prio=1 tid=0x08c03240 nid=0x5902 runnable [8b0f1000..8b0f187c]
     at java.net.SocketInputStream.socketRead0(Native Method)
     at java.net.SocketInputStream.read(SocketInputStream.java:129)
     at com.evermind.io.SingleReadBufferInputStream.readChunk(SingleReadBufferInputStream.java:116)
     at com.evermind.io.SingleReadBufferInputStream.read(SingleReadBufferInputStream.java:35)
     at com.evermind.server.http.AJPRequestHandler.readAJPPackets(AJPRequestHandler.java:462)
     at com.evermind.server.http.AJPRequestHandler.initRequest(AJPRequestHandler.java:396)
     at com.evermind.server.http.AJPRequestHandler.run(AJPRequestHandler.java:185)
     at com.evermind.server.http.AJPRequestHandler.run(AJPRequestHandler.java:125)
     at com.evermind.util.ReleasableResourcePooledExecutor$MyWorker.run(ReleasableResourcePooledExecutor.java:192)
     at java.lang.Thread.run(Thread.java:534)
"DestroyJavaVM" prio=1 tid=0x08053278 nid=0x5902 waiting on condition [0..bfffcac4]
"OC4JMonitorThread" daemon prio=1 tid=0x08d7a5a0 nid=0x5902 in Object.wait() [88667000..8866787c]
     at java.lang.Object.wait(Native Method)
     - waiting on <0x92aed1f8> (a java.lang.Object)
     at oracle.ons.NotificationQueue.internalDequeue(NotificationQueue.java:253)
     - locked <0x92aed1f8> (a java.lang.Object)
     at oracle.ons.NotificationQueue.dequeue(NotificationQueue.java:226)
     at oracle.ons.Subscriber.receive(Subscriber.java:136)
     at com.evermind.server.OC4JMonitorThread.run(OC4JMonitorThread.java:315)
     at java.lang.Thread.run(Thread.java:534)
"Thread-6" daemon prio=1 tid=0x087f9f98 nid=0x5902 in Object.wait() [886e8000..886e887c]
     at java.lang.Object.wait(Native Method)
     - waiting on <0x92aed368> (a java.lang.Object)
     at java.lang.Object.wait(Object.java:429)
     at oracle.ons.NotificationQueue.internalDequeue(NotificationQueue.java:255)
     - locked <0x92aed368> (a java.lang.Object)
     at oracle.ons.NotificationQueue.dequeue(NotificationQueue.java:215)
     at oracle.ons.SenderThread.run(SenderThread.java:81)
"Thread-5" daemon prio=1 tid=0x087f9d10 nid=0x5902 runnable [88769000..8876987c]
     at java.net.SocketInputStream.socketRead0(Native Method)
     at java.net.SocketInputStream.read(SocketInputStream.java:129)
     at oracle.ons.InputBuffer.readMoreData(InputBuffer.java:267)
     at oracle.ons.InputBuffer.getNextString(InputBuffer.java:222)
     at oracle.ons.ReceiverThread.run(ReceiverThread.java:228)
"TaskManager" prio=1 tid=0x087f9b30 nid=0x5902 waiting on condition [887ea000..887ea87c]
     at java.lang.Thread.sleep(Native Method)
     at com.evermind.util.TaskManager.run(TaskManager.java:247)
     at com.evermind.util.ReleasableResourcePooledExecutor$MyWorker.run(ReleasableResourcePooledExecutor.java:186)
     at java.lang.Thread.run(Thread.java:534)
"Thread-4" prio=1 tid=0x08ca2fb8 nid=0x5902 in Object.wait() [891e2000..891e287c]
     at java.lang.Object.wait(Native Method)
     - waiting on <0x92aee258> (a java.util.TaskQueue)
     at java.util.TimerThread.mainLoop(Timer.java:429)
     - locked <0x92aee258> (a java.util.TaskQueue)
     at java.util.TimerThread.run(Timer.java:382)
"AJPConnectionListener [0.0.0.0/0.0.0.0:3302]" prio=1 tid=0x086f1668 nid=0x5902 runnable [8a7ca000..8a7ca87c]
     at java.net.PlainSocketImpl.socketAccept(Native Method)
     at java.net.PlainSocketImpl.accept(PlainSocketImpl.java:353)
     - locked <0x927a0390> (a java.net.PlainSocketImpl)
     at java.net.ServerSocket.implAccept(ServerSocket.java:448)
     at java.net.ServerSocket.accept(ServerSocket.java:419)
     at com.evermind.server.http.AJPConnectionListener.run(AJPConnectionListener.java:60)
     at com.evermind.util.ReleasableResourcePooledExecutor$MyWorker.run(ReleasableResourcePooledExecutor.java:186)
     at java.lang.Thread.run(Thread.java:534)
"RMIServer [0.0.0.0:3202] count:2" prio=1 tid=0x086cbff0 nid=0x5902 runnable [8b172000..8b17287c]
     at java.net.PlainSocketImpl.socketAccept(Native Method)
     at java.net.PlainSocketImpl.accept(PlainSocketImpl.java:353)
     - locked <0x927a0850> (a java.net.PlainSocketImpl)
     at java.net.ServerSocket.implAccept(ServerSocket.java:448)
     at java.net.ServerSocket.accept(ServerSocket.java:419)
     at com.evermind.server.rmi.RMIServer.run(RMIServer.java:464)
     at com.evermind.util.ReleasableResourcePooledExecutor$MyWorker.run(ReleasableResourcePooledExecutor.java:186)
     at java.lang.Thread.run(Thread.java:534)
"JMSServer[webprod:3702]" prio=1 tid=0x0879aff0 nid=0x5902 runnable [8b1f3000..8b1f387c]
     at java.net.PlainSocketImpl.socketAccept(Native Method)
     at java.net.PlainSocketImpl.accept(PlainSocketImpl.java:353)
     - locked <0x92746aa0> (a java.net.PlainSocketImpl)
     at java.net.ServerSocket.implAccept(ServerSocket.java:448)
     at java.net.ServerSocket.accept(ServerSocket.java:419)
     at com.evermind.server.jms.JMSServer.run(JMSServer.java:516)
     at com.evermind.util.ReleasableResourcePooledExecutor$MyWorker.run(ReleasableResourcePooledExecutor.java:186)
     at java.lang.Thread.run(Thread.java:534)
"LogFlusher" daemon prio=1 tid=0x081b91a0 nid=0x5902 waiting on condition [8b274000..8b27487c]
     at java.lang.Thread.sleep(Native Method)
     at oracle.core.ojdl.BufferedLogWriter$Flusher.run(BufferedLogWriter.java:354)
"Signal Dispatcher" daemon prio=1 tid=0x080ba9e0 nid=0x5902 waiting on condition [0..0]
"Finalizer" daemon prio=1 tid=0x080b61a8 nid=0x5902 in Object.wait() [8e9a7000..8e9a787c]
     at java.lang.Object.wait(Native Method)
     at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:111)
     - locked <0x925b0378> (a java.lang.ref.ReferenceQueue$Lock)
     at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:127)
     at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:159)
"Reference Handler" daemon prio=1 tid=0x080b5dc8 nid=0x5902 in Object.wait() [8ea28000..8ea2887c]
     at java.lang.Object.wait(Native Method)
     at java.lang.Object.wait(Object.java:429)
     at java.lang.ref.Reference$ReferenceHandler.run(Reference.java:115)
     - locked <0x925b02a0> (a java.lang.ref.Reference$Lock)
"VM Thread" prio=1 tid=0x080b52e0 nid=0x5902 runnable
"VM Periodic Task Thread" prio=1 tid=0x080bee08 nid=0x5902 waiting on condition
"Suspend Checker Thread" prio=1 tid=0x080b9fc8 nid=0x5902 runnable As far as I can see, my PreparedStatement (or connection) is locked.... Any ideas?
~Morten ;-)

Can I use UserTransaction within a CMP Session bean?

Basically the problem is as follow:
I have the following method in a Statefull session bean:
public Whatever do()
processSomething();
notify();
the notify() basically notifying the client that then query for the something that was processed in the processSomething() method.
THE PROBLEM is that the changes have not been committed yet as the do() method is not finished yet and the container has not committed the changes.
THE QUESTION is - can I use UserTransaction inside
processSomething to commit the changes and leave the bean as CMP? I want to leave it as CMP as there are more methods on the bean and I don't want to have to manage the transactions for them.
Anyone has any other ideas?
Thanks in advanced.

Hi again,
The EJB specs say that a stateful Session Bean with CMT is NOT allowed to use the UserTransaction; see page 361 of the EJB2.0 specification. So combining them will not (or should not) work.
I suggest CMT+SessionSynchronization combined with using a flag to indicate whether notify should be called or not. Otherwise, you could try splitting up the bean into two beans: one with CMT and another one without. The one without CMT could use the UserTransaction and notify.
Also, you might want to check http://www.onjava.com/pub/a/onjava/2001/10/02/ejb.html
Hope that helps a bit,
Guy
http://www.atomikos.com

Deploying BMP Entity Bean with primary key calss

Hi,
I am using EJB 2.0 with and websphere studio 5.0 and database is sql server 2000.
My BMP Entity bean has a primary key class.From my client I am invoking the Entity Bean by calling it's findbyprimarykey method.
The home interface of my findbyprimarykey method returns a class of type Remote.But in the Entity Bean class,the return type is the primarykey class type.
My problem is invoking this findbyprimarykey from the client to get the remote interface so that the other business methods of the entity bean can be called.
The control goes into the ejbFindbyPrimaryKey but when it is returing from the Entity Bean class,it gives a remote exception (as the return type in Entity Bean class and Home interface are different for the findbyprimarykey method).
I think that somewhere in the deployment decriptor in my websphere,i have to specify the primarykey class type,which i am missing out and hence getting the error.
Please help me out with your advice and solution.
Thanks
Rahul Priyadarshi

Hi,
Sorry to disturb you again.
Even my code is also almost the same....i am pasting the code below...Please go through it and let me know if I have made any mistake..
EditVendorEntityBean.....(Bean Class)
package code.beans.EditVendor;
import code.beans.dataAccess.*;
import javax.ejb.CreateException;
import javax.ejb.RemoveException;
import javax.ejb.EntityBean;
import javax.ejb.EntityContext;
import javax.ejb.EJBException;
import javax.ejb.FinderException;
import javax.ejb.ObjectNotFoundException;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import java.sql.*;
import javax.sql.*;
import java.util.*;
* Bean implementation class for Enterprise Bean: EditVendorEntity
public class EditVendorEntityBean implements javax.ejb.EntityBean {
     private static Hashtable dataSources = new Hashtable();
     private String username;
private int Vendor_ID;
private int Category_Id;
private String Category_Name;
private String Vendor_Name;
private String Vendor_Address1;
private String Vendor_Address2;
private String Contact_Name;
private String Home_Phone;
private String Work_Phone;
private String email;
private String faxno;
private String userloginname;
private boolean dirtyFlag = false;
private EntityContext context;
private static final String DS_NAME = "jdbc/spiPOPS";
Connection con = null;
Statement stmt = null;
PreparedStatement st = null;
ResultSet res = null;
     //***********************Business Methods*********************
// Begin of Busines Methods
public void setData (String[] catname, String vendorname,String vendadd1,String vendadd2,String vendcontact,String venoff,String venres,String mailid,String venfax) {
          System.out.println("in setData where Vendor Id= "+ Vendor_ID);
               boolean status=false;
               boolean existing=false;
               ArrayList cat=new ArrayList();
               try
                    cat=getcategorylist(this.Vendor_ID);
               catch(SQLException e)
                    System.out.println("Could not get category list");
               System.out.println("Size of cat array -->" + cat.size() + " and string array size -->" + catname.length);
               if(catname.length>0)
                    //Removing unwanted vendor categories for a particular vendor id
                    for(int i=0;i<cat.size();i++)
                              existing=false;
                              String tempdata=(String)cat.get(i);
                              for(int j=0;j<catname.length;j++)
                                   if(tempdata.equals(catname[j]))
                                        existing=true;
                              if(!existing)
                                   try
                                        delvencat(this.Vendor_ID,tempdata.trim());
                                   catch(SQLException e)
                                        System.out.println("Could not delete record in POPS_VENDOR_CATEGORY for -->" + tempdata);
               //Adding new vendor categories for a particular vendor
                    try
                              for(int i=0;i<catname.length;i++)
                                   status=false;
                                   String strcat=catname;
                                   status=checkcat(this.Vendor_ID,strcat.trim());
                                   if(!status)
                                        insertvencat(this.Vendor_ID,strcat.trim());
                    catch(SQLException e)
                              System.out.println("Could not insert or select from POPS_VENDOR_CATEGORY table");
               this.Vendor_Name          =vendorname;
          this.Vendor_Address1     =vendadd1;
          this.Vendor_Address2     =vendadd2;
          this.Contact_Name          =vendcontact;
          this.Work_Phone               =venoff;
          this.Home_Phone               =venres;
          this.email                    =mailid;
          this.faxno                    =venfax;
               dirtyFlag = true;
               System.out.println("Leaving set data method");
public Vector getData() {
     Vector vctRec=new Vector();
     ArrayList arrdatas = new ArrayList();
     arrdatas.add(""+this.Vendor_ID);
     arrdatas.add(this.Vendor_Name);
     arrdatas.add(this.Vendor_Address1);
     arrdatas.add(this.Vendor_Address2);
     arrdatas.add(this.Contact_Name);
     arrdatas.add(this.Work_Phone);
     arrdatas.add(this.Home_Phone);
     arrdatas.add(this.email);
     arrdatas.add(this.faxno);
     vctRec.addElement(arrdatas);
     ArrayList cat=new ArrayList();
          try
          System.out.println("Calling getcategorylist from getdata with vendorid-->" + this.Vendor_ID);
          cat          = getcategorylist(this.Vendor_ID);
     catch(SQLException e)
               System.out.println("Could not get datas for category list");
     vctRec.addElement(cat);
     ArrayList allcats=new ArrayList();
     try
                    allcats          = getallcategorylist();
          catch(SQLException e)
                    System.out.println("Could not get datas for category list");
     vctRec.addElement(allcats);
          dirtyFlag = false;
     System.out.println("Before return statement in getdata with vector size -->" + vctRec.size());
          return vctRec;
// End of Business Methods
//**************************Entity Bean Methods*******************************
     * ejbActivate
     public void ejbActivate() {
          Vendor_ID = Integer.parseInt((String)context.getPrimaryKey());
     System.out.println("Inside ejbActivate Vendor_ID-->"+ Vendor_ID);
     * ejbLoad
     public void ejbLoad() {
          System.out.println("Inside ejbLoad ********" );
try {
loadRow();
}catch (Exception ex) {
          System.out.println("Failed in loadRow()");
throw new EJBException("ejbLoad: " +
ex.getMessage());
     * ejbPassivate
     public void ejbPassivate() {
     System.out.println("Inside ejbPassivate " );
Vendor_ID = 0;
     * ejbRemove
     public void ejbRemove() throws javax.ejb.RemoveException {
          //Empty Method
     * ejbStore
     public void ejbStore() {
System.out.println("Inside ejbStore " );
try {
storeRow();
}catch (Exception ex) {
          System.out.println("Exception thrown in storeRow" + ex.getMessage());
throw new EJBException("ejbLoad: " +
ex.getMessage());
     * getEntityContext
     public javax.ejb.EntityContext getEntityContext() {
          return context;
     * setEntityContext
     public void setEntityContext(javax.ejb.EntityContext ctx) {
          System.out.println("Inside setEntityContext " );
try{
     con = getConnection(DS_NAME);
     System.out.println("DB Connection Created!!");
catch(Exception e){
this.context = ctx;
     * unsetEntityContext
     public void unsetEntityContext() {
System.out.println("Inside unsetEntityContext " );
closeDbConnection(con, res, st);
this.context = null;
     * ejbCreate
     //code.beans.EditVendor.EditVendorEntityKey
     public code.beans.EditVendor.EditVendorEntityKey ejbCreate(String vendorid)
          throws javax.ejb.CreateException {
          return new EditVendorEntityKey(vendorid);
          //return null;
     * ejbPostCreate
     public void ejbPostCreate(String vendorid) throws javax.ejb.CreateException {
          //Empty
     * ejbFindByPrimaryKey
     //code.beans.EditVendor.EditVendorEntityKey
     public code.beans.EditVendor.EditVendorEntityKey ejbFindByPrimaryKey(
          code.beans.EditVendor.EditVendorEntityKey primaryKey)
          throws javax.ejb.FinderException {
try {
if(selectByPrimaryKey(Integer.parseInt(primaryKey.getVendorId()))) {
          System.out.println("Leaving the findbyprimarykey method from the entity bean");
     return primaryKey;
     //return null;
}else {
     throw new ObjectNotFoundException
     ("Row for id " + primaryKey + " not found.");
}catch (Exception ex) {
throw new EJBException("EXCEPTION IN ejbFindByPrimaryKey :- " + ex.getMessage());
     /*********************** Database Utility Routines *************************/
private boolean selectByPrimaryKey(int priKey)
throws SQLException {
     System.out.println("inside selectByPrimaryKey for primary key " + priKey);
String queryStr ="SELECT VENDOR_ID FROM POPS_VENDOR WHERE VENDOR_ID = " + priKey;
System.out.println("in selectByPrimaryKey where queryString is: "+ queryStr);
          stmt = con.createStatement();
ResultSet result = stmt.executeQuery(queryStr);
if(!result.next()) {
stmt.close();
     System.out.println("Did not find "+priKey);
return false;
else { //Found the primaryKey
Vendor_ID = result.getInt("VENDOR_ID");
stmt.close();
return true;
private void loadRow() throws SQLException {
          System.out.println("inside loadRow ...");
          stmt = con.createStatement();
          String queryStr = "SELECT VENDOR_NAME,VENDOR_ADDRESS1,VENDOR_ADDRESS2,CONTACT_NAME,HOME_PHONE,WORK_PHONE,EMAIL_ID,FAX_NO " +
                              "FROM POPS_VENDOR WHERE VENDOR_ID=" + Vendor_ID;
          System.out.println("Inside loadRow()***********"+queryStr);
          ResultSet result = stmt.executeQuery(queryStr);
          ArrayList catadatas=new ArrayList();
     if(!result.next())
     throw new SQLException("No record for primary key" + Vendor_ID);
          this.Vendor_ID               =Vendor_ID;
                    this.Vendor_Name          =result.getString("VENDOR_NAME");
                    this.Vendor_Address1     =result.getString("VENDOR_ADDRESS1");
                    this.Vendor_Address2     =result.getString("VENDOR_ADDRESS2");
                    this.Contact_Name          =result.getString("CONTACT_NAME");
                    this.Home_Phone               =result.getString("HOME_PHONE");
                    this.Work_Phone               =result.getString("WORK_PHONE");
                    this.email                    =result.getString("EMAIL_ID");
                    this.faxno                    =result.getString("FAX_NO");
                         System.out.println("Leaving loadrow method with loaded datas for vendor -->" + Vendor_ID);
                         stmt.close();
private ArrayList getcategorylist(int vendor) throws SQLException{
          String queryStr ="SELECT DISTINCT(VENDOR_CAT) FROM POPS_VENDOR_CATEGORY WHERE VENDOR_ID=" + vendor;
          System.out.println("Query for the cat list --> " + queryStr);
          stmt = con.createStatement();
          ResultSet result = stmt.executeQuery(queryStr);
          ArrayList catdatas=new ArrayList();
try{
               while(result.next())
                    catdatas.add(result.getString("VENDOR_CAT"));
          catch (SQLException e){
               stmt.close();
               System.out.println("Could not retrieve datas for Category list");
          stmt.close();
          System.out.println("size off array for cat -->" + catdatas.size() + " and datas ->" + catdatas);
          return catdatas;
     private ArrayList getallcategorylist() throws SQLException{
               //String queryStr ="SELECT DISTINCT(VENDOR_CAT) FROM POPS_VENDOR_CATEGORY";
               StringBuffer strquery=new StringBuffer(20);
               strquery.append("SELECT DISTINCT(CATEGORY_NAME) FROM POPS_CATEGORY");
               stmt = con.createStatement();
               //ResultSet result = stmt.executeQuery(queryStr);
               ResultSet result = stmt.executeQuery(strquery.toString());
               ArrayList catdatas=new ArrayList();
               try{
                    while(result.next())
                              //catdatas.add(result.getString("VENDOR_CAT"));
                              catdatas.add(result.getString("CATEGORY_NAME"));
               catch (SQLException e){
                         stmt.close();
                         System.out.println("Could not retrieve datas for All Category list");
               stmt.close();
               return catdatas;
     private void delvencat(int vendor,String vencat) throws SQLException {
          int update=-1;
          stmt = con.createStatement();
          String queryStr ="DELETE FROM POPS_VENDOR_CATEGORY WHERE VENDOR_ID = " + vendor + " AND VENDOR_CAT = '" + vencat.toUpperCase() + "'";
          System.out.println("Delete query --> " + queryStr);
          update= stmt.executeUpdate(queryStr);
          if(update!=1)
               System.out.println("Did not find data to delete");
          stmt.close();
     private void insertvencat(int vendor,String vencat) throws SQLException {
          int update=-1;
          String queryStr ="INSERT INTO POPS_VENDOR_CATEGORY(VENDOR_ID,VENDOR_CAT)" +
                              " VALUES(" + vendor +",'" + vencat + "')";
          System.out.println("Insert query --> " + queryStr);
          stmt = con.createStatement();
          update=stmt.executeUpdate(queryStr);
          if(update!=1)
               System.out.println("Could not insert records in the database");
          stmt.close();
     private boolean checkcat(int vendor,String catven) throws SQLException {
          boolean datastatus=false;
          String queryStr ="SELECT VENDOR_ID FROM POPS_VENDOR_CATEGORY WHERE VENDOR_ID = " + vendor + " AND VENDOR_CAT = '" + catven.toUpperCase() + "'";
          stmt = con.createStatement();
          ResultSet result = stmt.executeQuery(queryStr);
          datastatus=result.next();
          stmt.close();
          return datastatus;
private void storeRow() throws SQLException {
               System.out.println("Inside ejb store");
     if (!dirtyFlag) {
     System.out.println("Skipping the UPDATE because object is not dirty");
     return;
     CallableStatement cs=null;
try{
                    cs = con.prepareCall("EXEC POPS_VENDOR_UPDATE " + this.Vendor_ID + ",'" + this.Vendor_Name + "','" + this.Vendor_Address1 + "','" + this.Vendor_Address2 + "','" + this.Contact_Name + "','" + this.Work_Phone + "','" + this.Home_Phone + "','" + this.email + "','" + this.faxno +"'");
                    System.out.println("\n\n SQL Statement : \n " + "EXEC POPS_VENDOR_UPDATE " + this.Vendor_ID + ",'" + this.Vendor_Name + "','" + this.Vendor_Address1 + "','" + this.Vendor_Address2 + "','" + this.Contact_Name + "','" + this.Work_Phone + "','" + this.Home_Phone + "','" + this.email + "','" + this.faxno +"'");
                    cs.executeUpdate();
          catch (SQLException e){
                    cs.close();
                    System.out.     println("\n\n Error in calling stored procedure POPS_INSERT_NEW_REQUEST \n\n"+ e.getMessage() + "\n\n");
          cs.close();
          dirtyFlag = false;
     private Connection getConnection(String dbName) throws SQLException
          String configuredDataSourceName = null;
          if (dbName == null) {
               System.out.println("Attemp to get connection failed. The requested database name is null");
          DataSource dbSource = getDataSource(dbName);
          return dbSource.getConnection();
     private DataSource getDataSource(String dbName)
          // looking from cache;
          DataSource dbSource = (DataSource) dataSources.get(dbName);
          if (dbSource == null) { //we need to find it from JNDI
               try {
                    Context ic = new InitialContext();
                    dbSource = (DataSource) ic.lookup(dbName);
                    dataSources.put(dbName, dbSource);
               }catch (NamingException e){
          return dbSource;
     * User calls this function to safely close an connection
     * @param connt The connection a datasource
     * @param rs The resulSet inside this connection
     * @param statement The statement associate with this connection
     private void closeDbConnection(Connection cont,ResultSet rs,Statement statement)
          if (rs != null)
          try {
                    rs.close();
               } catch (SQLException ignored) {
                    ignored.printStackTrace();
          if (statement != null)
               try {
                    statement.close();
               } catch (SQLException ignored) {
                    ignored.printStackTrace();
          if (cont != null)
               try {
                    cont.close();
               } catch (SQLException ignored) {
                    ignored.printStackTrace();
     } //closeDbConnection
EditVendorEntity (Remote Interface)
package code.beans.EditVendor;
import javax.ejb.EJBObject;
import java.rmi.RemoteException;
import java.util.*;
* Remote interface for Enterprise Bean: EditVendorEntity
public interface EditVendorEntity extends javax.ejb.EJBObject {
     public void setData (String[] catname, String vendorname,String vendadd1,String vendadd2,String vendcontact,String venoff,String venres,String mailid,String venfax)
               throws RemoteException;
public Vector getData() throws RemoteException;
EditVendorEntityHome (Home Interface)
package code.beans.EditVendor;
import java.rmi.RemoteException;
import javax.ejb.CreateException;
import javax.ejb.FinderException;
import javax.ejb.DuplicateKeyException;
import javax.ejb.EJBHome;
import java.util.*;
* Home interface for Enterprise Bean: EditVendorEntity
public interface EditVendorEntityHome extends javax.ejb.EJBHome {
     * Creates an instance from a key for Entity Bean: EditVendorEntity
     public code.beans.EditVendor.EditVendorEntity create(String vendorid)
          throws javax.ejb.CreateException, java.rmi.RemoteException;
     * Finds an instance using a key for Entity Bean: EditVendorEntity
     public code.beans.EditVendor.EditVendorEntity findByPrimaryKey(
          code.beans.EditVendor.EditVendorEntityKey Vendor_ID)
          throws javax.ejb.FinderException, java.rmi.RemoteException;
EditVendorEntityKey (Primary Key Class)
package code.beans.EditVendor;
* Key class for Entity Bean: EditVendorEntity
public class EditVendorEntityKey implements java.io.Serializable {
     static final long serialVersionUID = 3206093459760846163L;
     public String primkey;
     * Creates an empty key for Entity Bean: EditVendorEntity
     public EditVendorEntityKey() { }
     public EditVendorEntityKey(String primarykey) {
          this.primkey=primarykey;
     public String getVendorId() {
return primkey;
     * Returns true if both keys are equal.
     public boolean equals(java.lang.Object otherKey) {
          if (otherKey instanceof code.beans.EditVendor.EditVendorEntityKey) {
               code.beans.EditVendor.EditVendorEntityKey o =
                    (code.beans.EditVendor.EditVendorEntityKey) otherKey;
               return (primkey.equals(otherKey));
          return false;
     * Returns the hash code for the key.
     public int hashCode() {
          return (primkey.hashCode());
Please go through and give me your comments and solution...
Thanks in advance
Rahul

BMP Entity never execute unsetEntityContext

hi,
i'm using BMP Entity beans
1. these seems never executing the unsetentitycontext method.
2. when undeploying my EJB or stopping my weblogic instance,
i would like to close properly some sockets, but no events
occurs.
What's happening, is it a unfixed problem? or a deployment problem?
I'm using weblogic server 6.1.1.0 SP1
thanks in advance

Entity beans are moved to a pool at the end of a transaction. When talking
to an entity bean directly, the transaction is a single method call. An
entity bean is attached at the server on demand (pulled from the pool and
activated)... and only stays attached during a transaction. So, when you
make the method call, the server attaches an entity bean, runs the method,
calls ejbStore(), and releases the bean back to the pool by calling
ejbPassivate(). Finally, beans that are in the 'pooled' state are garbage
collected by the server at it's discretion and the unsetEntityContext() is
called.
Hence, you have to release all your resources in ejbPassivtae().
"F Cahon" <[email protected]> wrote in message
news:3c62ad4e$[email protected]..
>
hi,
i'm using BMP Entity beans
1. these seems never executing the unsetentitycontext method.
2. when undeploying my EJB or stopping my weblogic instance,
i would like to close properly some sockets, but no events
occurs.
What's happening, is it a unfixed problem? or a deployment problem?
I'm using weblogic server 6.1.1.0 SP1
thanks in advance

CMP Entity beans using local interfaces

Why CMP entity beans with CMR relation ship using local interfaces only?
Why we should not use remote interface to get the CMR field relationship?
Pls give me the solutions

"Local interfaces provide the foundation for container-managed relationships among entity beans and session beans. The bean uses the local interface to maintain its references to other beans. For example, an entity bean uses its local interfaces to maintain relationships to other entity beans. Using local interfaces, beans can also expose their state and use pass-by-reference to pass their state between related bean instances. "
http://java.sun.com/developer/technicalArticles/ebeans/EJB20CMP/

How can we create an entity object using multiple tables?

Hi All,
I'm a newbie to OAF.
I'm trying to create a simple page using OAF.
While creating Entity object, there is an option to add the database objects from which we can create our Entity Object.
There we can enter only one database object.
If suppose I need to create a Entity object by using mutiple data base objects, how can I add other database objects?
Is there any option for multiple selection of database objects there?
Thanks in Advance

User,
a). You should use the [url http://forums.oracle.com/forums/forum.jspa?forumID=210]OA Framework Forum for this question.
b). Entity objects always correspond to a single table. I think you want to create a View object instead.
c). Really, you want to be using the OA Framework forum.
John

BMP Entity caching

Hi,
We are using BMP Entity beans on OC4J 9.0.2 and we have following problem:
Every access to an entity bean invokes ejbLoad even if the bean is already loaded. Moreover, it's seems like OC4J re-uses instances of the beans instead of creating new instances. I mean that, for example, if we have a bean that was loaded with PK=1, and we're trying to load another bean with PK=2, OC4J invokes ejbLoad on first bean with the new PK.
I've tried to increase max-instances and max-instances-per-pk without any success.
I've changed validity-timeout to big number, again without success.
I cannot change exclusive-write-access to true. OC4J always puts "false" there.
I found couple of posts in this forum about BMP caching, but there was no any solution.
Is there any solution to this problem?
Thanks

Stas -- There were a number of issues with EJB locking strategies in the v1022x. These included some scalability limits that we believed needed to be removed for enterprise systenms as well as being able to have true multi-JVM concurrency which was not easy to do with CMP in v1022x. Much of the exclusive-write-access code for non-read-only beans relied on these old mechanisms. A side effect of these changes was that for a small set of applications these changes might have some performance impact. We are looking to see how we might change this for the future but for the time being three methods exist to work around these issues. The first is to use TopLink for BMP. TopLink can provide caching that takes the place of the caching you were relying on in v1022x. The second it to use a caching mechanism like JCache that Avi described. The last and probably least desireable is to continue to use Oracle9iAS v0122x for your application.
Realize that these changes were made to increase enterprise scalability beyond what was available in v0122x, not to negatively impact enterprise scalability.
Laslty, it would be good to know if you are using multiple VMs in your application, if you manage multi-VM locking, and if the impact you are seeing is as great when you start to scale your application beyond a single VM.
Thanks -- Jeff

I have an external drive - WD My Passport FOR MAC. I want to format it to work on both mac and windows. Which format do you think I should use? Will either one cause damage to the files on the hard drive?

I have an external hard drive - WD My Passport FOR MAC. I want to format it to work on both mac and windows. I also want to be able to connect it to my TV and watch movies.
I read up and I think I am supposed to use exFAT or FAT32? I also saw MS-DOS. Which format should I should use? Will any of them cause damage to the files on the hard drive?
My little memory stick uses MS-DOS and it works on both mac and windows.
Please can you just tell me a little about each and suggest which one to use.
I know how to change it once you tell me so don't waste your time writing about changing it.

Will any of them cause damage to the files on the hard drive?
WARNING: FORMATTING A DRIVE ERASES IT COMPLETELY !!
If you need to carry large files (e.g., larger than about 4GB) back and forth, you may need ExFAT. Otherwise MS-DOS works for smaller files.
The Mac can Read, but not write Windows New Technology File System (NTFS) without an add-on program such as Paragon NTFS.

I can't send email from my iPad. I am from Australia but on holidays in Greece. Does anyone know what is the smtp outserver for Greece that I should use?

I can't send email from my iPad. I am from Australia but on holidays in Greece. Does anyone know what is the smtp outserver for Greece that I should use?

As you haven't told us who your email provider is, no.
There isn't an SMTP server for Greece - it is either provided by your email provider, or the Internet provider you are connected through.

Anyone know which render format I should use, my film will be used on a video wall (12 screens) and I need super quality. My footage format is 1080p HD resolution 1920x1080. I will be running the project from a mac with a direct line to video wall. Thanks

Anyone know which render format I should use, my film will be used on a video wall (12 screens) and I need super quality. My footage format is 1080p HD resolution 1920x1080. I will be running the project from a mac with a direct line to video wall. Thanks in advance.

I do some VJ-type work, involving playback of QuickTime files from the computer to projections, and I get good results using ProRes 422. That's convenient, because ProRes 422 is such a great editing codec, too.
Traditionally, VJs use PhotoJPEG codec, which also works well, but it's a bad editing codec. So you would have to export an edited master, then convert.
If you want it to look as good as possible, definitely schedule some time to test the footage on the wall. You may want to change the color correction of your footage to match the projectors. And if you feed the video wall some flat gray, you can see if any of the projectors need to be adjusted.
I'm not sure what application you're using for playback, but QuickTime Player 7 works well. It has an option to play fullscreen on an external monitor (View > Present Movie…).

What format i should use for my external hard drive that can be used interchangeably between mac and pc?

What format i should use for my external hard drive that can be used interchangeably between mac and pc?

Usually Fat32/MS-DOS as mentioned, but that has several limitatiuns, like 4GB filesize limit.
One option is MacDrive for you PCs... allows them to Read/Write HFS+...
http://www.mediafour.com/products/macdrive/
More options...
NTFS-3G Stable Read/Write Driver...
http://www.ntfs-3g.org/
MacFUSE: Full Read-Write NTFS for Mac OS X, Among Others...
http://www.osnews.com/story/16930

I tried to export photos from iMac to iPad using a USB flash drive. The photos are on the drive but when I plug it into the iPad, the iPad says the device requires too much power. Any ideas of what type of USB flash drive I should use?

I tried to export photos from iMac to iPad using a USB flash drive. The photos are on the drive but when I plug it into the iPad, the iPad says the device requires too much power. Any ideas of what type of USB flash drive I should use?

You can transfer photos outside of iTunes. I do it all the time. THat said, i have a 50/50 success rate with them. I'd avoid sandisk and kingston, their bundled software triggers the 'too much power' warning.
I've had mixed luck with lexar, some work, some don't.
I did have good luck with an older 4 gig geek squad one.
Look for drives without software on them, without bright LED lights and I haven't gotten any larger than 4 gig to work, but that may just be me.
For a less troublesome way? h onestly, I use a SD card that I've formatted with the DCIM folder. I've never had one of them trigger the 'too much power' warning. Just make sure they're not SDXC. those don't work.

BMP Entity should use UserTransaction ???

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