rmi

This question already has an answer here: java.rmi.ServerException: RemoteException occurred in server thread (ClassNotFoundException) 4 answers I'm running the program here on 2 JVMs on diff physical machines. I get the error RemoteException java.rmi.UnmarshalException: error unmarshalling return; nested exception is: java.lang.ClassNotFoundException: CalculatorImpl_Stub (no security manager: RMI class loader disabled) I've even tried running it on the same machine(unchanged program) and it works but it doesnt work on diff machines. Can someone pls help me out? @beny23- Thanks but I still end

what is the difference between socket programming, rmi and Servlets. When to use what? The Socket APIs are the low-level (transport level) abstraction by which a Java application interacts with the network, and by extension with remote clients and services. Socket and related APIs support reliable byte stream and unreliable messaging services. They are typically used for TCP/IP and UDP/IP, though other networking protocol stacks can (at least in theory) be supported. RMI is a framework and protocol family for implementing application-level networking between Java applications. It models

I have a Java application that require communication between different process. Process could run in same JVM or different JVM, but runs on the same machine. My application need to submit "messages" to another process (same or different JVM) and forgot about it. similar to messaging queue like IBM "MQ", but simple, and only use memory, no IO to hard disk for performance gains. I'm not sure what is the best approach from Performance prescriptive. I wonder if RMI is efficient in terms of Performance, I think it require some overhead. What about TCP/IP socket using local host? any other thought?

VisualVM是集成了多个JDK命令工具的一个可视化工具，它主要用来监控JVM的运行情况，可以用它来查看和浏览Heap Dump、Thread Dump、内存对象实例情况、GC执行情况、CPU消耗以及类的装载情况。 jstatd是一个rmi的server应用，用于监控jvm的创建和结束，并且提供接口让监控工具可以远程连接到本机的jvm 。jstatd位于 $JAVA_HOME/bin目录下，具体使用方法如下： 1，启动RMI服务 在需要被监控的服务器上面，通过jstatd来启动RMI服务 首先，配置java安全访问，将如下的代码存为文件 jstatd.all.policy： grant codebase "file:${java.home}/../lib/tools.jar" { permission java.security.AllPermission; }; 然后在jstatd.all.policy所在目录下，通过如下的命令启动RMI服务： jstatd -J-Djava.security.policy=jstatd.all.policy -J-Djava.rmi.server.hostname=192.168.100.175 2.启动VisualVM，添加远程主机 1)选择jstatd connection 2)输入端口信息，默认为1099 3)最终效果 来源：

#0 系列目录# 聊聊远程通信 Java远程通讯技术及原理分析 聊聊Socket、TCP/IP、HTTP、FTP及网络编程 RMI原理及实现 RPC原理及实现 轻量级分布式 RPC 框架 使用 RMI + ZooKeeper 实现远程调用框架 深入浅出SOA思想 微服务、SOA 和 API对比与分析 聊聊同步、异步、阻塞与非阻塞 聊聊Linux 五种IO模型 聊聊IO多路复用之select、poll、epoll详解 聊聊C10K问题及解决方案 #1 简介# RMI是远程方法调用的简称，像其名称暗示的那样，它能够帮助我们查找并执行远程对象的方法。通俗地说， 远程调用就象将一个class放在A机器上，然后在B机器中调用这个class的方法 。 我个人认为，尽管RMI不是唯一的企业级远程对象访问方案，但它却是最容易实现的。与能够使不同编程语言开发的CORBA不同的是，RMI是一种纯Java解决方案。 在RMI中，程序的所有部分都由Java编写 。 #2 概念# 我在前面已经提到，RMI是一种远程方法调用机制，其过程对于最终用户是透明的：在进行现场演示时，如果我不说它使用了RNI，其他人不可能知道调用的方法存储在其他机器上。当然了，二台机器上必须都安装有Java虚拟机（JVM）。 其他机器需要调用的对象必须被导出到远程注册服务器，这样才能被其他机器调用。因此，

I'm new to both Web Services and RMI and I wonder which is the better way to do remoting between different web applications, when these applications are all written in Java, that is when different programming languages don't matter (which would be the advantage of WS). While on the one hand I would guess that there's a performance overhead when using web services (does anyone have some numbers to prove that?), on the other hand it seems to me that web services are much more loosely coupled and can be used to implement a more service-oriented architecture (SOA) (which isn't possible with RMI,