Re: replicating non-remote objects

I don't know if I would necesarily encourage this behavior, but I
          wonder if a SCOPE_CLUSTER workspace would work? At the very least,
          it's worth looking into.
          Jason
          On Thu, 16 Sep 1999 17:29:54 -0500, "Sam" <[email protected]> wrote:
          >I have a hastable storing references of remote objects and other hastables
          >for caching , Can anyone suggest a way to replicate the hastable in a
          >cluster of 2 WL4.5 servers.
          >Is it possible?
          >
          >thanks,
          >Sam Jacob
          >
          >

Alain is correct on both points.
          Alain Rogister wrote:
          > I believe SCOPE_CLUSTER in WorkspaceDef is only a placeholder for things
          > to come, since workspaces are not a clustered service yet.
          >
          > You might think of using JNDI as an alternative to workspaces, but it
          > won't be that easy. Quoting the clustering developer guide:
          >
          > <quote>
          > Note that you cannot reliably use the naming service to replicate
          > objects.
          > For example, if you bind an RMI object "myReplicatedObject" into a
          > cluster-wide JNDI tree, and "myReplicatedObject" from Server One
          > places a serializable -- but not Remote -- object "myDataObject" into
          > the
          > JNDI tree, that unRemoted object does not get replicated to other
          > servers in the cluster. If Server One fails and a client calls
          > "myReplicatedObject," the RMI service will be available, but its
          > "myDataObject" will not.
          >
          > If you need to guarantee access to some data that is produced or used
          > by a replicated object, you should store the data in a database so that
          > it
          > can be reached by any server in the cluster that is hosting the
          > replicated
          > service. An example of this is an entity EJBean.
          > </quote>
          >
          > Alain.
          > --
          > Alain Rogister
          > Ubiquity s.a.
          > http://www.ubiquity.be
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Similar Messages

HOW TO PASS NON REMOTE OBJECT PARAMETER

good day,
hi im new to java and rmi, and i need help pls, my question is how can i pass a non-remote object/local object as a parameter to a remote method. can u pls give a code for the:
1. client that will invoke the remote method and pass the object in remote objects method.
2. object that will be passed to the server/remote object( a serilizable object of course).
3. the remote object and the method that will receive the object parameter.
thank you very much for your kindness,
p.s.
you can email me to [email protected]
batusai,

When you create the object locally, and pass it to the server, at that point it exists on both systems/in both jvms.
Why don't you write your own example, and try it. If you get in trouble, post the code, and we will help you.

Best Practices for many Remote Objects?

Large Object Model doing JDBC over RMI
Please read the following and provide suggestions for a recommended approach or literature that covers this area well?
N-Tiered Architecture
JSP/Servlet (MVC) - Database Access Layer - Database
Applets - JSp/Servlet Engine - Database Access Layer - Database
Application Layer - Application Layer - Database Access Layer - Database
I have an object model developed using Torque (A JDBC Object Relational modeling framework) for over 100 tables (to be over 160) that I am commencing to enable over RMI. I have got several remote methods up and running. For some of the simple methods starting up has been easy. Going forward I forsee issues.
Each table has a wrapper or data object and a peer object that have setters/getters and special methods as desired. The majority of these classes are extended from Base Objects that have basic common functionality for retrieving, creating, and manipulating with a database using SQL.
I have started building a Remote Interface and an Implementation class that invoke the necessary methods and classes within the Object Model to pull successfully off or update the database. Additionally the methods will need to return objects that represent non-primitive serializable dataobjects and collections of objects.
Going forward client applications, servlets, and jsps will be using the database in more complex and comprehensive methods over rmi. Here are a couple of things I am concerned about.
1) When to use java.rmi.server.codebase for class loading? In my implementation several of the remote methods will return objects (e.g Party, Country, CountryList, AccountList). These objects themselves are composed of other objects that are not part of the jvm. For all remote methods that return non-primitive objects must you include the classes in the codebase for the client to operate upon them. Couldn't this be pointless as you have abstract and extended classes all residing within the codebase? In practice do people generally build very thin proxy objects for the peer/data objects to hold just the basic table elements and sets?
2) Server Versioning/Identity - Going forward more server classes will be enabled via rmi. Everytime one wants to include more methods on interface that is available must you update the interface, create new implementation classes, and redistribute the Remote Interface, and stubs/skels to client apps to operate on again? Is there some sort of list lookup that a client can do to say which processes are available remotely presently (not just at initialization)? As time changes more or fewer methods might be available?
Any help is greatly appreciated.

More on Why other approaches would be better?
I have implemented some proxy objects for the remote Data Objects produced by Torque. To ease the pain, I have also constructed a proxy Builder that takes the table schema and builds a Proxy Object, an inteface for the proxy, and methods to copy between the Torque Data Object (which only lives on the server) into the Proxy Object (accessible by client and/or server).
The generated methods are useable in the object implementing the Remote Interface but are themselves not remoteable. Only the Server would use these methods. Clients can only receive primitives, proxy Objects, or collections of ProxyObjects.
This seems to be fairly light currently. I had to jump hoops to use Torque and enable remote apps to use the proxy objects. What would be the scaling issues that will come up? Why would EJBs with containers and all kinds of things about such as CMP vs BMP to be concerned with be a better approach?
Methods can be updated to do several operations verses Torque and return appropriately (transactions). In this implementation the client (Servlet, mini App or App) needs the remote stub and the proxy objects (100 or so) to stand in for the Torque generated Data Objects. A much smaller and lighter set of classes, based on common JDK classes, instead of the torque classes (and necessary abstracts/objects/interfaces/exceptions for Torque).

How to access the remote Objects Without Db_links?

Hi ,
I want to know how to access the remote objects without db_link.That is i want to access a object in some other server which has different database.

SanjayBala, just so you know that it is possible to create a database link in Oracle to non-Oracle databases in some circumstances. Look up Generic Connectivity aslo know as Heterogenous Services. With 11g Oracle has basically renamed the feature and replaced it with somethinkg named ike DG4ODBC.
I have not spent time studying the details for DB4ODBC but with HS Oracle provided the interface and you had to obtain the necessary ODBC driver on your own. I had Oracle on AIX reading and writing to SQL Server on Windows but the developers chose to write a java program and connect to both via it. On Windows and Linux platforms the necessary ODBC drivers might be available without the requirement to go out and purchase one.
The Oracle Open Gateway product is an advanced version of the above features with drivers for specific non-Oracle databases included like DB2 or Informix.
HTH -- Mark D Powell --

Premature Garbage Collection of Remote Objects

I have a problem with distributed garbage collection and RMI. In CSPoker we try to support RMI for client-server communication. The client looks up the server through the registry, calls the login method and receives back a Remote Object reference called ServerContext. The client can register Remote even listener Objects with the server.
In both directions we occasionally see:
java.rmi.NoSuchObjectException: no such object in table
The behaviour is completely unpredictable. Some developers never see it, others see it all the time. Even on the same machine, sometimes it failes immediately
and sometimes it fails after a while. One person running the Sun JRE 6 on Windows has this poblem most frequently.
Can this be a bug or do we misinterpret something? The way we see it, as long as the client leases the Remote Object it shouldn't be GCed. All tests are run on localhost so no network partition can occur.
The problem would probably be solved if we hold static references to all Remote Objects in the local JVM. This is not an option because we want the Objects to be GCed once the lease expires.
Here are 2 debugging outputs of server runs with RMI logging enabled:
http://cspoker.pastebin.com/f27a7d6fc
As you can see, the lease requests are coming through but a NoSuchObjectException is thrown and the Object is finalized.
http://cspoker.pastebin.com/f732797d2

Thanks for the quick reply.
For instance:
11:56:02,427 DEBUG (org.cspoker.common.api.shared.context.ForwardingRemoteServerContext.java:72) [finalize] - Garbage collecting old context: org.cspoker.server.rmi.export.ExportingServerContext@15a8767
07.11.2008 11:56:02 sun.rmi.server.UnicastServerRef logCall
FEINER: RMI TCP Connection(2)-10.0.4.106: [10.0.4.106: sun.rmi.transport.DGCImpl[0:0:0, 2]: java.rmi.dgc.Lease dirty(java.rmi.server.ObjID[], long, java.rmi.dgc.Lease)]
07.11.2008 11:56:03 sun.rmi.transport.Transport serviceCall
FEIN: RMI TCP Connection(2)-10.0.4.106: [10.0.4.106] exception:
java.rmi.NoSuchObjectException: no such object in table
        at sun.rmi.transport.Transport.serviceCall(Transport.java:129)
        at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:466)
        at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:707)
        at java.lang.Thread.run(Thread.java:595)The context Object is exported and returned to the client here :
return (ExternalRemoteServerContext) UnicastRemoteObject.exportObject(context, 0);Then [the object|http://code.google.com/p/cspoker/source/browse/trunk/server/rmi/src/main/java/org/cspoker/server/rmi/export/ExportingServerContext.java?r=1023] that was just exported is GCed.
11:56:02,427 DEBUG (org.cspoker.common.api.shared.context.ForwardingRemoteServerContext.java:72) [finalize] - Garbage collecting old context: org.cspoker.server.rmi.export.ExportingServerContext@15a8767Then a lease request comes in:
FEINER: RMI TCP Connection(2)-10.0.4.106: [10.0.4.106: sun.rmi.transport.DGCImpl[0:0:0, 2]: java.rmi.dgc.Lease dirty(java.rmi.server.ObjID[], long, java.rmi.dgc.Lease)]Then the client calls a method on the remote object and the NoSuchObjectException is thrown.
The behaviour is non-deterministic in any case but yes, on the Linux JVM I'm not seeing the problem, somebody on Windows gets it all the time.

Returning Non Serializable Objects

Is it possible in anyway to return non serializable objects from the remote method of an EJB, for instance return a result set. Everytime i try, i get a CORBA marshalling exception, i tried to put the resultset in a serilized object such as an enumeration or vector but got the same error when retreiving it from the enumeration or vector. Help is needed and appreciated. Thanx.

Is it possible in anyway to return non serializable objects from the remote method of an EJB, for instance return a result set. Everytime i try, i get a CORBA marshalling exception, i tried to put the resultset in a serilized object such as an enumeration or vector but got the same error when retreiving it from the enumeration or vector. Help is needed and appreciated. Thanx.

Javax.naming.NameAlreadyBoundException: Failed to bind remote object

I am getting an error while deploying wli-ejbs.ear file. This ear uses oracle thin drivers to connect to database. But while deploying i am receiving an error as below. Can anyone please help me to solve this problem?
Deployer:149033]preparing application wli-ejbs on managed2_cvf01
[Deployer:149033]preparing application wli-ejbs on managed1_cvf01
[Deployer:149033]prepared application wli-ejbs on managed1_cvf01
[Deployer:149033]prepared application wli-ejbs on managed2_cvf01
[Deployer:149033]activating application wli-ejbs on managed1_cvf01
[Deployer:149033]activating application wli-ejbs on managed2_cvf01
[Deployer:149034]An exception occurred for task [Deployer:149026]Deploy application wli-ejbs on cvf01_cluster.: weblogic.management.DeploymentException:
Exception:weblogic.management.ApplicationException: activate failed for calendar/oracle
Module: calendar/oracle Error: Exception activating module: EJBModule(calendar/oracle,status=PREPARED)
Unable to deploy EJB: RemoteCalendarBean from calendar/oracle:
[EJB:011008]Unable to bind EJB Home Interface to the JNDI name: RemoteCalendarBean.
javax.naming.NameAlreadyBoundException: Failed to bind remote object (ClusterableRemoteRef(704752282736664516S:172.24.206.163:[7003,7003,7004,7004,7003,7004,-1,0,0]:172.24.206.163:7003,172.24.206.163:7003:cvf01:managed1_cvf01 null)/948 [com.bea.wli.calendar.api.BusinessCalendarHome+javax.ejb.EJBHome+weblogic.ejb20.interfaces.RemoteHome]) to replica aware stub at RemoteCalendarBean(ClusterableRemoteRef(704752282736664516S:172.24.206.163:[7003,7003,7004,7004,7003,7004,-1,0,0]:172.24.206.163:7003,172.24.206.163:7003:cvf01:managed1_cvf01 [704752282736664516S:172.24.206.163:[7003,7003,7004,7004,7003,7004,-1,0,0]:172.24.206.163:7003,172.24.206.163:7003:cvf01:managed1_cvf01/944, -8505871579836432025S:172.24.206.163:[7005,7005,7006,7006,7005,7006,-1,0,0]:172.24.206.163:7003,172.24.206.163:7003:cvf01:managed2_cvf01/1008])/944 [com.bea.wli.calendar.api.BusinessCalendarHome+javax.ejb.EJBHome+weblogic.ejb20.interfaces.RemoteHome]); remaining name ''
at weblogic.rmi.cluster.ClusterableRemoteObject.onBind(ClusterableRemoteObject.java:177)
at weblogic.jndi.internal.BasicNamingNode.bindHere(BasicNamingNode.java:347)
at weblogic.jndi.internal.ServerNamingNode.bindHere(ServerNamingNode.java:124)
at weblogic.jndi.internal.BasicNamingNode.bind(BasicNamingNode.java:291)
at weblogic.jndi.internal.WLEventContextImpl.bind(WLEventContextImpl.java:279)
at weblogic.jndi.internal.WLContextImpl.bind(WLContextImpl.java:386)
at weblogic.ejb20.deployer.ClientDrivenBeanInfoImpl.activate(ClientDrivenBeanInfoImpl.java:1141)
at weblogic.ejb20.deployer.EJBDeployer.activate(EJBDeployer.java:1385)
at weblogic.ejb20.deployer.EJBModule.activate(EJBModule.java:631)
at weblogic.j2ee.J2EEApplicationContainer.activateModule(J2EEApplicationContainer.java:3315)
at weblogic.j2ee.J2EEApplicationContainer.activate(J2EEApplicationContainer.java:2194)
at weblogic.j2ee.J2EEApplicationContainer.activate(J2EEApplicationContainer.java:2167)
at weblogic.management.deploy.slave.SlaveDeployer$ComponentActivateTask.activateContainer(SlaveDeployer.java:2503)
at weblogic.management.deploy.slave.SlaveDeployer$ActivateTask.doCommit(SlaveDeployer.java:2421)
at weblogic.management.deploy.slave.SlaveDeployer$Task.commit(SlaveDeployer.java:2138)
at weblogic.management.deploy.slave.SlaveDeployer.commitUpdate(SlaveDeployer.java:676)
at weblogic.drs.internal.SlaveCallbackHandler$2.execute(SlaveCallbackHandler.java:35)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:219)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:178)

run the sync.bat file as mentioned in the instructions...
or through EBCC(select sampleportal-project dir, app name "sampleportal")...
good luck
Vijay
"ellen" <[email protected]> wrote:
>
I installed sampleportal and did all the changes according to the documents,
when
the server started, there is this error:
Unable to deploy EJB: CatalogWebService from catalogwe.jar:
Unable to bind EJB Home Interface to the JNDI name: sampleportal.BEA_commerce.CatalogWebService.
The error was: javax.naming.nameAlreadyBoundException: Failed to bind remote
object...to
replica aware stub at CatalogWebService; remaining name'sampleportal.BEA_commerce'
After the server started with the above error, I tried to run the app, here
is what
occured:
PortalPersistenceManager: portal'sampleportal/sampleportal' not found.
Has anybody seen this before?
Ellen

Failed to replicate non-serializable object Weblogic 10 3 Cluster environ

Hi,
We have problem in cluster environment, its showing all the objects in Session needs to be serialized, is there any tool to find what objects in session needs to be serialized or any way to find. There was no issue in WLS 8 when the application again setup in WLS 10, we are facing the session replication problem.
The setup is there are two managed server instance in cluster, they are set to mulicast(and also tried with unicast).
stacktrace:
####<Jun 30, 2010 7:11:16 PM EDT> <Error> <Cluster> <userbser01> <rs002> <[ACTIVE] ExecuteThread: '1' for queue: 'weblogic.kernel.Default (self-tuning)'> <<anonymous>> <> <> <1277939476284> <BEA-000126> <All session objects should be serializable to replicate. Check the objects in your session. Failed to replicate non-serializable object.>
####<Jun 30, 2010 7:11:19 PM EDT> <Error> <Cluster> <userbser01> <rs002> <[ACTIVE] ExecuteThread: '1' for queue: 'weblogic.kernel.Default (self-tuning)'> <<anonymous>> <> <> <1277939479750> <BEA-000126> <All session objects should be serializable to replicate. Check the objects in your session. Failed to replicate non-serializable object.>
Thanks,

Hi
Irrespective of WLS 8.x or WLS 9.x, 10.x, in general any objects that needs to be synced/replicated across the servers in cluster should be Serializable (or implement serializable). The object should be able to marshall and unmarshall. Simple reason why it did not showed in WLS 8.x is may be in that version they could not show these details like Error. May be they showed as Info or Warn or Just Ignored it. Weblogic Server became more and more stable and more efficient down the lines like from its oldest version 4.x, 5.x, 6.x, 7.x to latest 10.x. So my guess is they added more logic and more functionality to capture all possible errors and scenarios. I did worked on WLS 8.1 SP4 to SP6 long time back. Could not remember if I saw or did not see these errors for cluster domain with non-serializabe objects. I vaguley remember seeing it for Portal Domains but not sure. I do not have 8.x installed, otherwise I would have given a quick shot and confirm it.
So even though it did not showed up in WLS 8.x, still underneath rule is any object that needs to be replicated that is getting replicated in cluster needs to implement Serializable interface.
Thanks
Ravi Jegga

Pass non-serializable objects over sockets

I am working with a non-serializable class.I can't change it to serializable(since it's an API class).I can't create a subclass either as I need to pass the same exact Object .I have tried wrapping it in a serializable class (as transient )but then the particular object that I need is not serialized.Is there a way to pass non-serializable objects over sockets?.Some other way of doing this?.

Have you considered leaving it in situ and using RMI to manipulate it remotely ?
To be a little pedantic, if you need the "same exact object" then there's no technique that will work for you, since you can only copy an object between JVMs, not move it.
D.

Remote object trying to return another remote object and a ClassCastExcepti

I have a server running with a TreeModel (the tree model implements Remote). I also have the the TreeNodes all linked together on the server. Now, I can get to the TreeModel on the server and the root node of the remote tree model.
treeModelStub = (treeModelIface)Naming.lookup(url+"remoteTM"); //works
rootStub = (remoteTreeNodeIface)treeModelStub.getRoot(); //works. The call to getRoot returns Object
But when I call
remoteTreeNodeIface aChild = (remoteTreeNodeIface)rootStub.getChildAt(index) //Does not work. "Exception in thread "main" java.lang.ClassCastException
at remoteTreeNode_Stub.getChildAt(Unknown Source)
The remote tree node method getChildAt returns TreeNode because the class implements TreeNode:
public class remoteTreeNode extends UnicastRemoteObject implements rdcaDataIface, Comparable, TreeNode {
public TreeNode getChildAt(int idx) {
System.out.println("DEBUG: class is "+this.getClass()); // class is remoteTreeNode
return (remoteTreeNode)children.get(idx);
The remote interface is defined as:
public interface rdcaDataIface extends java.rmi.Remote {
public TreeNode getChildAt(int idx) throws RemoteException;
Any ideas why this does not work. Why can a remote object of type Object be returned just fine, but a TreeNode not be returned?
Thank you for your help,
Brent

I have a server running with a TreeModel (the tree
model implements Remote). I also have the the
TreeNodes all linked together on the server. Now, I
can get to the TreeModel on the server and the root
node of the remote tree model.
treeModelStub =
(treeModelIface)Naming.lookup(url+"remoteTM");
//works
rootStub =
(remoteTreeNodeIface)treeModelStub.getRoot();
//works. The call to getRoot returns Object
But when I call
remoteTreeNodeIface aChild =
(remoteTreeNodeIface)rootStub.getChildAt(index)******************************************
can only be casted to rdcaDataIface. The returned object is an instanceof the rdcaDataIface_stub, which have nothing to do with TreeNode.
//Does not work. "Exception in thread "main"
java.lang.ClassCastException
at remoteTreeNode_Stub.getChildAt(Unknown
t(Unknown Source)
The remote tree node method getChildAt returns
TreeNode because the class implements TreeNode:
public class remoteTreeNode extends
UnicastRemoteObject implements rdcaDataIface,
Comparable, TreeNode {
public TreeNode getChildAt(int idx) {
System.out.println("DEBUG: class is
lass is "+this.getClass()); // class is
remoteTreeNode
return (remoteTreeNode)children.get(idx);
The remote interface is defined as:
public interface rdcaDataIface extends java.rmi.Remote
public TreeNode getChildAt(int idx) throws
ows RemoteException;
Any ideas why this does not work. Why can a remote
object of type Object be returned just fine, but a
TreeNode not be returned?
Thank you for your help,
Brent

Remote Object - not able to get the returned value from java method

     Hi ,
I am developing one sample flex aplication that connects to the java code and displays the returned value from the
java method in flex client. Here I am able to invoke the java method but not able to collect the returned value.
lastResult is giving null . I am able to see the sysout messages in server console.
I am using flex 3.2 and blazeds server and java 1.5
Here is the code what I have written.
<?xml version="1.0" encoding="utf-8"?><mx:WindowedApplication xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" backgroundColor="#FFFFFF" initialize="initApp()">
<mx:Script><![CDATA[
import mx.controls.Alert;
import mx.binding.utils.ChangeWatcher;
import mx.rpc.events.ResultEvent;
import mx.messaging.*;
import mx.messaging.channels.*
public function initApp():void {
     var cs:ChannelSet = new ChannelSet();
     var customChannel:Channel = new AMFChannel("my-amf", "http://localhost:8400/blazeds/messagebroker/amf");     cs.addChannel(customChannel);
     remoteObj.channelSet = cs;
public function writeToConsole():void {      remoteObj.writeToConsole(
"hello from Flash client");
      var returnedVal:String = remoteObj.setName().lastResult;     Alert.show(returnedVal);
//[Bindable]
// private var returnedVal:String;
]]>
</mx:Script>
<mx:RemoteObject id="remoteObj" destination="sro" />
<mx:Form width="437" height="281">
<mx:FormItem>
</mx:FormItem>
<mx:Button label="Write To Server Console" click="writeToConsole()"/>
</mx:Form>
</mx:WindowedApplication>
Java code
public
     public SimpleRemoteObject(){
          super();     }
class SimpleRemoteObject {
     public void writeToConsole(String msg) {          System.out.println("SimpleRemoteObject.write: " + msg);     }
     public String setName(){          System.
out.println("Name changed in Java");
          return "Name changed in Java";
And I have configured destination in remote-config.xml
<destination id="sro">
   <properties>
    <source>SimpleRemoteObject</source>
    <scope>application</scope>
   </properties>
</destination>
Please help me .

You are not able to get the returned value because if you see the Remote object help you will realise you have to use result="resultfn()" and fault = "faultfn()"
In this you define what you wish to do.
More importantly in the remote object you need to define which method you wish to call using the method class like this
<mx:RemoteObject id="remoteObj" destination="sro" result="r1" fault="f1" >
     <Method name="javaMethodName" result="r2" fault="f2"/>
<mx:RemoteObject>
r2 is the function where you get the result back from java and can use it to send the alert.

Two remote objects calls on the same php class

Hi to all,
I've encountered a strange issue while developing with remote objects.
I've a mxml component with an init() method inside which is called by a menu.
When the init() method is called it makes 7 remote object calls which are bound to some components' dataprovider.
Among this calls I've got 2 remote object which refer to the same remote class. This because I have to call the class twice and the bind the result to two different combobox. Below you find the code:
<mx:RemoteObject id="myFile" source="myRemoteClass" destination="amfphp" showBusyCursor="true" makeObjectsBindable="true" fault="traceFault(event)"/>
<mx:RemoteObject id="myXls" source="myRemoteClass" destination="amfphp" showBusyCursor="true" makeObjectsBindable="true" fault="traceFault(event)"/>
in the init function I make this calls:
myFile.listDir("dir_1")
myXls.listDir("dir_2")
then in the mxml code I bound the result of myFile to combobox1 and the result of myXls on combobox2.
The problem arise when I call the myXls' listDir method. When I call it I receive the following error:
code:
Client.Error.DeliveryInDoubt
Message:
Channel disconnected
Detail:
Channel disconnected before an acknowledgement was received
The strange thing is that not only the myXls object returns this error, but also all the other 6 remote object return the same error above.
I'm not sure, but I guess that the error could be caused by the two remote object which call the same php remote class. If I comment one of the two calls everything works fine.
Do you have any suggestion about?
Thanks!!
Bye
Luke

Hi Jan.
1) We have the 2 VO, each with 3 rows to fill in data. What I mean is that when i just fill in all the fields for the first row of the first VO, and the value of one of these fields is bigger than 50, then after the exception is thrown and the message is displayed, the fields for the first VO are duplicated and shown in the second VO as if the user had inserted them.
2) We tried yesterday the validateEntity and a Method and Atributte Validator approaches after reading that white paper with the same results.
The validation is correctly done using any of the those methods.
I will try to reproduce this issue with the HR schema.
Thanks in advance once again.

Exporting two remote objects on the same port

Hi,
I would like to export two remote objects on the same host, same port and bind them with different service names.
There is no problem when I do that from the same Java program.
But when I export and bind an object from a Java program 1, I cannot do the same with the second (and similar) Java program 2. This is the stack trace of my Exception:
java.rmi.server.ExportException: Port already in use: 50040; nested exception is:
     java.net.BindException: Address already in use: JVM_Bind
     at sun.rmi.transport.tcp.TCPTransport.listen(TCPTransport.java:243)
     at sun.rmi.transport.tcp.TCPTransport.exportObject(TCPTransport.java:178)
     at sun.rmi.transport.tcp.TCPEndpoint.exportObject(TCPEndpoint.java:382)
     at sun.rmi.transport.LiveRef.exportObject(LiveRef.java:116)
     at sun.rmi.server.UnicastServerRef.exportObject(UnicastServerRef.java:145)
     at sun.rmi.server.UnicastServerRef.exportObject(UnicastServerRef.java:129)
     at java.rmi.server.UnicastRemoteObject.exportObject(UnicastRemoteObject.java:275)
     at java.rmi.server.UnicastRemoteObject.exportObject(UnicastRemoteObject.java:178)
     at java.rmi.server.UnicastRemoteObject.<init>(UnicastRemoteObject.java:75)Can some one help please

It should work in any version of Java as long as the server socket factories are null or equal according to Object.equals() or its override in the SSF.equals() method if any. Which needs to be present and needs to take the form:
public boolean equals(Object object)
return object != null && object.getClass() == this.getClass();
}with further tests if the server socket factories have additional state.

PL/SQL: ORA-04052: error occurred when looking up remote object.

Hi All,
I'm getting the following error message while executing a PL/SQL Block.
PL/SQL: ORA-04052: error occurred when looking up remote object UPLDUSER.filestatushistory@FTS
ORA-00604: error occurred at recursive SQL level 1
ORA-03106: fatal two-task communication protocol error
ORA-02063: preceding line from FTSStatement
declare
v_coun number;
begin
select count(*) into v_coun
from updluser.filestatushistory@fts;
end;Back ground of the situation as follows,
My DataBase version 10.2.0.3 DB Name :DB1
Table Owner : UPLDUSER
Table Name : FILESTATUSHISTORY
I have a report user on the same database and I have grant all on the above table to report user
Report User : RPT_FTS
SQL> GRANT ALL ON FILESTATUSHISTORY_V TO RPT_FTS;Now Please find the below database details where I'm getting subjected error.
Database version : 9.2.0.8
DB Name : DB2
User Name : RPT_REPORTS
I Have create a dblink from RPT_REPORTS to RPT_FTS on DB1 and the dblink works fine. But getting the above error while running it.
but When I do the same other 10.2.0.3 db , the above PL/SQL block works fine without any problem.
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Now the strange about this is that I have Created a new table on DB1 db like below;
SQL> CREATE TABLE UPLDUSER.ABC AS SELECT * FROM FILESTATUSHISTORY;and retry my code on DB2 (9.2.0.8) after changing the table to ABC and it worked. Now I don't know whats wrong with a original table(FILESTATUSHISTORY).
To over come the problem and a work-a-round method I create a view on the DB1 (RPT_FTS) like the below
SQL> CREATE VIEW FILESTATUSHISTORY AS SELECT * FROM UPLDUSER.FILESTATUSHISTORY;and was able to run the PL/SQL block Remotely.
Just wants To know what whould have been the cause for this .
Cheers
Kanchana

Hi Kanchana,
Perhaps following link of google search has answer to your query
ORA-04052. The search result contains some useful articles whose URLs I shan't post in the forums.
HTH!
*009*

Exporting a PDF so that non-printing objects show but don't print?

I've just spent a couple hours trying to find an answer to this in the forums, but can't. (The most frustrating was one thread where the original poster said, "I found the answer here," and gave a link that went right back to the main page of the forum. Argh.)
Okay, anyway ... what I need to do?
I've got a document with graphics that I want to show up on the pdf when I export it, but that--if a reader prints it--don't print.
The document looks like a 3-ring binder with "tabs" for each section--just like the real thing. But the rings and tabs go right up to the edge and look terrible when printed, and whose printer can print right at the edge of the paper, anyway? But the tabs work as navigational links while looking a the pdf, and the rings just make it look cool, so I WANT them in the pdf.
I've tried:
Turning the entire layer into a non-printing layer (one that "shows" but does not "print"). But when I export it to a pdf, it doesn't show up on the pdf to look at OR to print. So that doesn't work.
Using the Attribute option to turn each object into a non-printing object, but so far as I can tell, that doesn't do a thing, because they still print from the pdf.
Exporting with the "create pdf layers" turned on and off. Exporting with the "include non-printing items" turned on and off.
Basically, I've pretty much tried everything. I gather, from browsing the forums, that this is POSSIBLE, but can't for the life of me figure out what to do to make it happen. (Short of hiding the tabs' layer and creating an entirely separate PDF and calling it "Print version" which is not exactly what I want to do!)
Is there maybe some magical combination of ons and offs I need to select to make this whole thing work?
(And, seriously, am I the only person who thinks the supporting documentation is just dreadful? I can't find anything in any of the Help screens that even mentions this, much less explains how to do it.)
Any help is appreciated!!
--Deb

Partial progress...
The button option (and, I'm using CS3, by the way--I should have said that originally) does work in terms of showing on the pdf but not printing.
The problem is that it messes up the way the document looks.
I said it's designed to look like a 3-ring binder with tab-dividers between each section, and each tab has a hyperlink to take you to that section.
Now, when you've got a paper binder in front of you, the tabs stay in the same sequence, and often overlap a bit (which mine do). The problem I'm having, having turned all of them into buttons, is that when you click on any of them, it "jumps" to the front of the row, so that they don't "flow" in the correct sequence.
Am I explaining this well? You know, the top-most tab is at the top of the pile, the next one is always below it and above the third one, and so on ... you never see the second tab on TOP of the first one. I'm trying to get the document to act as close to a hard-copy binder as I can, and it did ... except the buttons keep jostling each other for attention...
I'm going to go play around with this some more now, but ... any suggestions? (Other than restructuring my tabs so that they don't overlap at all?)

Re: replicating non-remote objects

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