rmi

Why/How am I getting the error: NoClassDefFoundError: org/springframework/aop/framework/ProxyFactory

北城以北 提交于 2019-12-05 11:54:45
Goal: Start up a server which supports remote access to method calls. The application doesn't fail till after all services are created. The jar is in the target/lib directory. Parent pom has the dependency: <dependency> <groupId>org.springframework</groupId> <artifactId>spring-aop</artifactId> <version>${version.spring}</version> </dependency> Note: I am able to create a spring bean of type: org.springframework.aop.framework.ProxyFactory Stack Trace: 36438 [main] ERROR org.springframework.web.context.ContextLoader - Context initialization failed org.springframework.beans.factory

RMI、Hessian、Burlap、Httpinvoker、WebService的比较

╄→гoц情女王★ 提交于 2019-12-05 08:23:52
一、综述 本文比较了RMI、Hessian、Burlap、Httpinvoker、WebService5这种通讯协议的在不同的数据结构和不同数据量时的传输性能。 RMI是java语言本身提供的远程通讯协议,稳定高效,是EJB的基础。但它只能用于JAVA程序之间的通讯。 Hessian和Burlap是caucho公司提供的开源协议,基于HTTP传输,服务端不用开防火墙端口。协议的规范公开,可以用于任意语言。 Httpinvoker是SpringFramework提供的远程通讯协议,只能用于JAVA程序间的通讯,且服务端和客户端必须使用SpringFramework。 Web service是连接异构系统或异构语言的首选协议,它使用SOAP形式通讯,可以用于任何语言,目前的许多开发工具对其的支持也很好。 测试结果显示,几种协议的通讯效率依次为: RMI > Httpinvoker >= Hessian >> Burlap>> web service RMI不愧是JAVA的首选远程调用协议,非常高效稳定,特别是在大数据量的情况下,与其他通讯协议的差距尤为明显。 HttpInvoker使用java的序列化技术传输对象,与RMI在本质上是一致的。从效率上看,两者也相差无几,HttpInvoker与RMI的传输时间基本持平。 Hessian在传输少量对象时,比RMI还要快速高效

RMI、Hessian、Burlap、Httpinvoker、WebService的比较

喜你入骨 提交于 2019-12-05 08:23:38
一、综述 本文比较了RMI、Hessian、Burlap、Httpinvoker、WebService5这种通讯协议的在不同的数据结构和不同数据量时的传输性能。 RMI是java语言本身提供的远程通讯协议,稳定高效,是EJB的基础。但它只能用于JAVA程序之间的通讯。 Hessian和Burlap是caucho公司提供的开源协议,基于HTTP传输,服务端不用开防火墙端口。协议的规范公开,可以用于任意语言。 Httpinvoker是SpringFramework提供的远程通讯协议,只能用于JAVA程序间的通讯,且服务端和客户端必须使用SpringFramework。 Web service是连接异构系统或异构语言的首选协议,它使用SOAP形式通讯,可以用于任何语言,目前的许多开发工具对其的支持也很好。 测试结果显示,几种协议的通讯效率依次为: RMI > Httpinvoker >= Hessian >> Burlap>> web service RMI不愧是JAVA的首选远程调用协议,非常高效稳定,特别是在大数据量的情况下,与其他通讯协议的差距尤为明显。 HttpInvoker使用java的序列化技术传输对象,与RMI在本质上是一致的。从效率上看,两者也相差无几,HttpInvoker与RMI的传输时间基本持平。 Hessian在传输少量对象时,比RMI还要快速高效

Zabbix-(六) JMX监控

纵然是瞬间 提交于 2019-12-05 06:21:06
Zabbix-(六) JMX监控 一.前言 Zabbix提供了JMX监控,它通过JMX API获取JVM信息,从而提供监控数据。本文讲述使用JMX监控Tomcat的JVM信息。 准备 Zabbix Server 4.4 (ip: 192.168.152.140) 运行Java应用的主机 以下简称Server-A (已被Zabbix监控) (ip:192.168.152.142) 二.安装Zabbix-Java-gateway Zabbix Server通过Zabbix Java gateway收集JMX监控数据,因此首先需要安装Zabbix-Java-gateway,同时修改Zabbix Server的配置。 安装Zabbix-Java-gateway 可以在其他主机安装Zabbix-Java-gateway,只需要修改Zabbix-server配置文件,指定Zabbix-Java-gateway的地址和端口,这里就在部署Zabbix Server的主机上部署Zabbix-Java-gateway。 # yum install zabbix-java-gateway 配置Zabbix-Java-gateway 配置文件是 /etc/zabbix/zabbix_java_gateway.conf 文件,文本采取默认配置,配置项详细信息可以参考下图或者参考 官方Zabbix-java

help for solving problems in a java rmi assignment

谁都会走 提交于 2019-12-05 05:08:11
问题 I want to write an application to share desktop between client and server with java rmi. This is the interface: public interface IServer extends Remote{ public void share(BufferedImage image) throws RemoteException; } ----------------------------- // This is the server side code: public class ServerFrame extends JFrame implements IServer{ public static void main(String args[]) { try { ServerFrame frame = new ServerFrame(); frame.setVisible(true); LocateRegistry.createRegistry(1099); Naming

Is rmic still needed?

浪子不回头ぞ 提交于 2019-12-05 04:56:25
Is it true that the rmi interface compiler is not needed for java 1.5 or newer and that just compiling the java file where the UnicastRemoteObject is defined with javac is enough?Rmic still works and it generates a stub class file if you give it the class file of the implementation of the remote object. According to the RMI tutorial: http://download.oracle.com/javase/tutorial/rmi/overview.html Compiling Sources As with any Java program, you use the javac compiler to compile the source files. The source files contain the declarations of the remote interfaces, their implementations, any other

rmi.transport.tcp.tcptransport Connectionhandler consumes much CPU

痞子三分冷 提交于 2019-12-05 00:58:49
问题 i am running an third party RMI-Server app providing exactly one method ("getImage()" returns an image as byte[]). The implementation of this method (getting the image via a SOAP-WS) is provide by me. The problem on running this RMI-Server is the high CPU consumption (measured with jvisualvm): 65% of cpu time go into "sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run()" and on second place with 15% is "sun.net.www.http.KeepAliveCache.run()" . The "real" work (scaling the image) comes

基于zookeeper的远程方法调用(RMI)的实现

╄→гoц情女王★ 提交于 2019-12-04 21:09:09
采用zookeeper的命令服务,采用不同的目录结构存储不同模块不同服务的rmi的url,使用key来对应不同的服务。同时采用zookeeper解决了单点问题。 当有两个相同的服务注册时,因为采用的是临时有序znode,也会注册成功,客户端在调用时,发现有多个不同url,则会随机调取一个使用。 当一个服务down时,zookeeper会通知客户端更新url缓存,从而去掉down服务的链接。加入时,也会同步客户端url数据。 原理图如下: 1).目录结构 2).zookeeper调用 3).分布式调用 实现代码如下: 1.定义测试服务接口与实现 public interface Service extends Remote,Serializable{ public void service(String name); } public class ServiceImpl implements Service{ @Override public void service(String name) { System.out.println(name); } } 2.RMIServer public class RMIServer { private static final Logger logger = LoggerFactory .getLogger(RMIServer. class

RMI exportObject(Remote obj, PORT); createRegistry(PORT);

北战南征 提交于 2019-12-04 19:47:53
I'm wondering can both the UnicastRemoteObject.exportObject(Remote,portNo) & LocateRegistry.createRegistry(portNo); porNo be the same? I test it works but I'm worrid if there is any complication? Why does exportObject need to specify an object to work? when I use exportObject(Remote obj) it throws an NullPointerException . I'm wondering can both the UnicastRemoteObject.exportObject(Remote,portNo) & LocateRegistry.createRegistry(portNo); portNo be the same? Yes, unless you are using unequal socket factories, which you aren't. If there is a problem an exception will be thrown. I test it works

RMI JavaFX 2 - NotSerializableException error

落爺英雄遲暮 提交于 2019-12-04 16:59:01
I'm trying to send objects using Java RMI in a JavaFX 2 project, but when the following code runs it returns a NotSerializableException. My Admin class is Serializable and so is the super class. However it seems the exception is pointing towards the JavaFX SimpleIntegerProperty fields inside the Admin class. I don't know what to do from here as the class being sent via RMI is serializable. Any help much appreciated. ObservableList<Admin> data = null; try { data = FXCollections.observableArrayList(Main.docServer.getAllAdmins()); } catch (RemoteException e) { e.printStackTrace(); } The error I