rmi

Java RMI : connection refused

和自甴很熟 提交于 2019-11-27 09:34:45
I have written following code for the client of RMI. But getting java.rmi.ConnectException: Connection refused to host: localhost; nested exception is: java.net.ConnectException: Connection refused: connect code : import java.rmi.*; import java.net.*; import java.rmi.registry.*; class client { public static void main(String [] ars) { Iface serv; Registry r; String serveraddr = ars[0]; String serverport = ars[1]; String text = "Hey jude"; System.out.println("Sending" + text); try{ r = LocateRegistry.getRegistry( serveraddr, (new Integer(serverport)).intValue() ); serv = (Iface) r.lookup("rmi:/

How to organize RMI Client-Server architecture

徘徊边缘 提交于 2019-11-27 09:23:33
I am developing a secured Banking service in RMI with a GUI both for Server and Client. The Server must be able to log every operations (new User, deleted User, Withdrawal, Lodgement...) The Client will do these operations. As everything is secured, the Client must at first, create an account with a name and a password in the GUI. After that, the GUI adds the User in the Bank UserList(arrayList) as a new Customer and the User can do several operations. It seems straightforward at first but I think my conception is not correct. Is it correct to send the whole Bank by RMI ? Because at first I

configuring RMI host so that it should know which client port is accessing it

烂漫一生 提交于 2019-11-27 08:30:07
问题 I have been working on spring RMI and I have set up a host and one client. Below is the code of my host. I want to modify it in such a way that host should know which client is accessing it, so in other words server should know which client port is accessing it. How can I achieve this in Spring RMI? interface :- package com.javatpoint; public interface Calculation { int cube(int number); } class :- package com.javatpoint; public class CalculationImpl implements Calculation{ @Override public

Java RMI AccessControlException: access denied

我的梦境 提交于 2019-11-27 08:03:52
Hey I'm getting a AccessControlException: access denied when attempting to start up a RMI app I'm writing, I can't work out why I get this exception if I open it on the default port 1099, or on another dynamic port, my policy file currently grants everything (will change when app is finished). I am stuck as to where it is going wrong, any help would be of great use My code public class Main { /** * @param args the command line arguments */ public static void main(String[] args) throws RemoteException, AlreadyBoundException, MalformedURLException { if (System.getSecurityManager() == null) {

java.net.MalformedURLException: unknown protocol: rsrc

穿精又带淫゛_ 提交于 2019-11-27 07:53:59
问题 I get this; java.net.MalformedURLException: unknown protocol: rsrc I'm not entirely sure what to do about this unknown protocol. I am using simple RMI to communicate between two JVMs. Is it a jar that I am missing that contains this protocol and, if so, which one? I haven't found Google searches to be all that great for this issue. Any help would be appreciated. Thanks. EDIT2: To clarify, my RMI code works when running from Eclipse. It's when I export and use runnable jar files and such that

RMI multiple clients - one server object for each of them

走远了吗. 提交于 2019-11-27 06:29:49
问题 I am writing a prototype of cryptographic system using RMI. I have a problem, because when I launch two clients, they got a response from one object in the server from OneTimePad class. So client A recives key that was reserved for client b, because of specific algorithm, this situation could not happen. Server send to the clients only E and N variable (like in RSA) so i can't serialize OneTimePad object and send it through the network (because it will have all keys in it). How can I make for

RMI and CORBA Differences?

我是研究僧i 提交于 2019-11-27 06:12:19
问题 I am studying for a final and have a few questions about RMI and CORBA. These are discussion questions taken from a study guide so there is no real application context around them. Why are RMI and CORBA based on TCP? The question states to answer in terms of invocation semantics. What I have thought of so far is that TCP is going to be more reliable than UDP and in RMI/CORBA, we want network reliability. I also read somewhere that TCP is deeply embedded in the native Java networking classes.

Java RMI - Client Timeout

眉间皱痕 提交于 2019-11-27 04:16:48
I'm building a Distributed System using Java RMI and it must support a server loss. If my client is connected to a Server using RMI, if this server goes down (cable problems for example), my client should get an exception so it can connect to other server. But when the server goes down, nothing happens to my client, he keeps waiting for the reply. How can I set a timeout for that? For socket read timeout, you can set your own factory like this, RMISocketFactory.setSocketFactory( new RMISocketFactory() { public Socket createSocket( String host, int port ) throws IOException { Socket socket =

How to close rmiregistry running on particular port?

纵然是瞬间 提交于 2019-11-27 03:27:45
问题 I am working on Java RMI. I am having little issue with running my rmiregistry on port 2028 as I allready used that one to run my test program. I can run my program using other port but I would like to know, How we can close rmiregistry running on perticular port ? 回答1: If you want to do this in programming, we do something like: // create the registry Registry rmiRegistry = LocateRegistry.createRegistry(port); ... // connect to it JMXConnectorServer connector = JMXConnectorServerFactory

Using JAVA NIO framework in SPRING server

拈花ヽ惹草 提交于 2019-11-27 02:00:41
问题 I'm implementing an hybrid server application that mixes a Web-Servlet and a plain Java application. The java application manages thousands of sockets for remote devices, while the Web application interacts with the user to set/read the state of any socket. Java NIO, or Apache-MINA vs Jboss-Netty, seems to be good options for the sockets application. The first question is, can I run both applications (Servlet with web interface + JAVA NIO application) in the same server? I'am using now Tomcat