JavaRanch Distributed Java

java

Fri, 9 May 2008 01:26:58 MDT

What are the files generated after using IDL to Java Compilet ?

jsp vs rmi

Fri, 9 May 2008 01:24:57 MDT

How can I call the rmi methods from jsp.

After running the following jsp shows the error given below the code.
=======================================================================
<html>
<head>
<title>JSP and RMI</title>
</head>
<body>
<%@ page import='java.rmi.*' %>
<%@ page import='java.rmi.Naming' %>
<%@ page import='server1.*' %>
<%@ page import='interface1.*' %>
<%@ page import='java.lang.*' %>

<%
try
{
RajaService rp=(RajaService)Naming.lookup("rmi://localhost/RajaService");
out.println("5 sqare is : "+rp.sqare(5));
}
catch(Exception ex){out.pri...

jsp vs rmi

Fri, 9 May 2008 00:00:57 MDT

I would like to call the remote methods (rmi) from jsp.

How can I do so.

How do I listen a client shutdown

Thu, 8 May 2008 02:42:54 MDT

I have written a Java component prototype to hit a server by multiple
client .each client when ask the server for the service from the server
server will provide a port and client will invoke the rmi://call to the service in that port and get the service .

Each client will not know if some other client is also accessing the same service using the other port .

Thats is my component and so far so good .

Now I have a problem in this program ,If a client shut down it not been known to server so the server is not unbinding the port as a result that port which was accessing by the the client is get busy for ever

I dont want that ,I want if the client is get down server automatically kno...

dynamic loading of user-defined return types

Tue, 6 May 2008 00:20:48 MDT

Hi all,
I'm working with rmi. if my remote method return type is primitive or predefined, i am able to access that methods from client side. For ex. interface HelloRMI extends Remote
{
boolean isValid(.....)throws RE
int getNo(.......)th...
JFrame getHelloFrame(.....)...
Properties getProp(.....)....
}
is working fine, and able to access these from client side.
but if i have one method which returns custom-object like
Student getStud(....)... or StudFrame getFrame(....) , etc. these are not accessible from client and i am getting ClassDefNotFoundException for Student, StudFrame, etc.

XMLDecoder, RMISocketFactory, codebase, many docs, confused me a lot. pleas...

Rmi compilation in weblogic

Mon, 5 May 2008 07:10:46 MDT

hi

please tell me how to compile and deploy and run rni example in weblogic. Please it is very very urgent..
help as soon as possible

notBoundException

Mon, 5 May 2008 01:30:45 MDT

i have a rmi application using distribued databases,
the server is runnning fine and binding to the registry but the client is not running and showing the exception java.rmi.notBoundException.

i have tried everything but in vain . if anyone can guide please its urgent..as my whole project is based on this..

failover mechanism

Sat, 3 May 2008 10:04:31 MDT

Hi,
I am not sure how fail over(jvm crash etc) can be handled in case of RMI applications?Is it the task of the developer to store serializable objects by writing them in a file or there is some default implementation provided by JVM?

If it is task of developer then how to do this?By writing each object into a file before writing into stream or is there any listener available?

What will happen at server and client side if an object is half transfered and network connection goes down ?

Please express your views.

regards,
ajse

No skeletons required

Fri, 2 May 2008 07:14:28 MDT

I'm doing some research on RMI. I'm aware that there's no longer a need to explicitly created stubs and skeletons using rmic. I know the stubs are created at runtime as they are needed, but what about skeletons? Are they automatically created as well? If no skeleton is present, what is it on the server that is actually handling the network connection?

java. lang. NoClassDefFoundError

Wed, 30 Apr 2008 11:02:22 MDT

hi all,
i am working with rmi. For accessing remote methods returning primitives, serializable objects from client i dont have any problems. its working fine.

but i want to access remote methods which returns my own type of objects (Student, EmpFrame, LoginFrame, etc). when i tried from rmi client (another system) it connects with rmi server, but then produces the above exception (in Subject box!!).
docs, tutorials confused me more, different technological rmi updations from Sun, XMLDecoder, Serializable, codebase, etc.,
please help
Thanks

rmic compiling errors

Tue, 29 Apr 2008 07:24:18 MDT

I am compiling my stub from my class at code/suncertify/server/ComputeEngineFactory.class

quote:
rmic -d . code/suncertify/server/ComputeEngineFactory
./code/suncertify/server/ComputeEngineFactory_Stub.java:4: '{' expected.
public final class code/suncertify/server/ComputeEngineFactory_Stub

ComputeEngineFactory_Stub.java:4: Public class code must be defined in a file called "code.java".
public final class code/suncertify/server/ComputeEngineFactory_Stub

my ComputeEngineFactory class was created through javac with no errors and has a valid package name: code.suncertify.server. What else can I change ?
I am using jdk1.5 on the Mac.

Two or more JVM in a single machine

Tue, 29 Apr 2008 07:00:18 MDT

Hi to some background ,I want to invoke RMI call to a server ,and I have written the following client code ,that access a getCounter()to show the incremented static variables value ,each time calling the getCounter() will increment the static variable by 1.That code is deployed in the server.

PDOS_Remote_Interface service1 =(PDOS_Remote_Interface)Naming.lookup("rmi://x.xxx.xxx.xxx/REMOTE_SERVICE");
String s1= service1.sayHello();
int cont1 = service1.getCounter();
System.out.println(">>>>>> "+s1);
System.out.println(">>>>>> cont1 "+cont1);

PDOS_Remote_Interface service2 =(PDOS_Remote_Interface)Naming.lookup("rmi://y.yyy.yyy.yyy/REMOTE_SERVICE");
String s2=...

How to avoid client dependencies on classes of an Exception's cause?

Mon, 28 Apr 2008 09:34:16 MDT

Hi!

Suppose I want to throw a chained exception over the wire. The cause of the exception is a class that might not be present on the client receiving the exception. What can I do?

1) The obvious: no chaining. Copy the message from the underlying exception into a brand new one, and loose the stacktrace (or at least log it to the serverlog).

2) Maybe I can copy the exception details from the old exception into the new one? It's just textual data, right?

Can somebody please give advice on what the usual approach is in such situations? Thanks a lot!

Regards,
Michael

Socket timeouts for RMI

Sun, 27 Apr 2008 12:32:12 MDT

Does RMI have a timeout period within which a remote invocation must return? Can I change this timeout period programatically for a specific remote method invocation?

Thanks
Gayatri

What does cluster do to our applications?

Sat, 26 Apr 2008 21:26:10 MDT

Cluster, the term I have run across for so many times while reading some technical articles, and I tried googling detailed explanations for it but found few that really satisfied me. though, after reading those explanations, I've gained a shallow understanding of what it is about. I know that clustering basically means putting serveral servers(here I am refering to Web servers like Resin, Tomcat, HTTP Servers like Apache...) together and letting them all fulfil requests from the client to condense to processing time, and I think that there should be more features that clustering has to provide, so what's that?

And the most important, I want to know whether clustering will keep sessions(HttpSession in the Servlet API) for other n...

How to create Stubs and Skeletons in RAD 7

Fri, 25 Apr 2008 00:24:05 MDT

I want to create the stubs and skeletons from RAD 7 . I have created
a Java project and created the files

1. RMIInterface-> The interface need to implement .
2. RMIImpl -> The implementer class.
3. RMIClient -> The client class .
4. RMIServer ->the server class .

Now Using this IDE in RAD 7 Can you please let me know how to genarte the
stubs and skeletons . Something like Right click on RMIImpl ->source ->...??
I just forget the steps .

rmic reqd?

Wed, 23 Apr 2008 05:23:59 MDT

Hi,

I am a beginner in RMI and i did a simple app using RMI. I didnt compile using rmic to get the stub but the program worked fine. Is rmic really required?

rmic reqd?

Wed, 23 Apr 2008 05:21:59 MDT

Hi,

I am a beginner in RMI and i did a simple app using RMI. I didnt compile using rmic to get the stub but the program worked fine. Is rmic really required?

error while making rmi over jrmp call

Tue, 22 Apr 2008 06:51:45 MDT

hi all,
i'm trying to make a rmi call by looking up the service name in the registry.

code:

 
Registry registry = LocateRegistry.getRegistry("blrgislin13",38614);
InvokedBusinessProcessDetails bpDetails = null;
Object obj = registry.lookup("IIOPBusinessProcessProxy");

i'm getting the following exception.

code:

 
java.rmi.ConnectIOException: non-JRMP server at remote endpoint
 at sun.rmi.transport.tcp.TCPChannel.createConnection(TCPChannel.java:217)
 at sun.rmi.transport.tcp.TCPChannel.newConnection(TCPChannel.java:171)
 at sun.rmi.server.UnicastRef.newCall(UnicastRef.java:306)
 at...

making a rmi call with ipv6

Tue, 22 Apr 2008 00:08:23 MDT

hi,
i'm making a rmi call to a server on a ipv6 enabled machine.
when i use the host name, it works fine.
but when i use the ip address, it throws me a timeout exception
the url value is
java.naming.provider.url=jnp://[fe80::216:72ff:fe3c:21gf]:19014

code:

 
javax.naming.CommunicationException: Receive timed out [Root exception is java.net.SocketTimeoutException: Receive timed out]
 at org.jnp.interfaces.NamingContext.discoverServer(NamingContext.java:1058)
 at org.jnp.interfaces.NamingContext.checkRef(NamingContext.java:1127)
 at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:478)
 at org.jnp.interfaces.NamingContext...

Remote Object having JFrame referrence

Thu, 17 Apr 2008 22:00:19 MDT

Hi guys. In my remote object i am having a referrence to a jframe object. The thing is i am developing a game server. so when the one player makes the move then it is sent to server and server tells the other remote object to update its GUI.

So remote object is having referrence to the gui and when it receives the message it calls methods on the gui.

But i am getting a horrible error when i try to do this. This is code for the remoteobjectplayer

code:


public class RemoteObjectPlayer implements clientInterface,Serializable
{
String playerName ;
ClientGUI player ;
 
public RemoteObjectPlayer(ClientGUI player) throws RemoteException {
this.player = play...

Java's network programming power (simple question)

Fri, 11 Apr 2008 08:33:08 MDT

I want to Java's power for network programming.
I saw many p2p program which is so power and secure and written in our
friend Java.
But I have little question.
Is Java the same power as C++ in network programming?

interoperability between Java and .net system

Thu, 10 Apr 2008 23:43:07 MDT

Hi,

I need to integrate Java application and .net application. Basically I need to use the UI of the .net application. On click of a confirmation button in my Java application, application needs to redirect to .net application pages. Once the transaction is completed in the .net application again application needs to redirect to Java application.
.net application has already been build. We are building the Java application.If an one has idea please suggest how can this be implemented.

Regards,
Vinutha

Can we use C++ for Business logic(Model)?

Thu, 10 Apr 2008 07:27:05 MDT

I am curios to know can We use C++ for Model.
Well,I am not asking how to use but need to know should I use c++ instead
of Java for business logic?
How good it will be?

please clarify this.

JavaRanch Distributed Java

java

jsp vs rmi

jsp vs rmi

How do I listen a client shutdown

dynamic loading of user-defined return types

Rmi compilation in weblogic

notBoundException

failover mechanism

No skeletons required

java. lang. NoClassDefFoundError

rmic compiling errors

Two or more JVM in a single machine

How to avoid client dependencies on classes of an Exception's cause?

Socket timeouts for RMI

What does *cluster* do to our applications?

How to create Stubs and Skeletons in RAD 7

rmic reqd?

rmic reqd?

error while making rmi over jrmp call

making a rmi call with ipv6

Remote Object having JFrame referrence

Java's network programming power (simple question)

interoperability between Java and .net system

Can we use C++ for Business logic(Model)?

What does cluster do to our applications?