rmi

what is stub on the “server” and what does skeleton mean?

由 浪尽此生 提交于 2019-12-30 03:43:14
问题 What does stub do on the server side ? And what is a skeleton ? This is a diagram from wikipedia. I installed stub both on the server machine and the client machine. I understand that stub helps in the networking on the client side but what does stub do on the server side ? Also in the above figure what does skeleton mean ? 回答1: look at the followed picture: To be short, stub and skeleton are counterparts in a web service setup. Skeleton belongs to service provider side and stub belongs to

Reconnect RMI client after server restart

由 社会主义新天地 提交于 2019-12-30 02:01:08
问题 I have an RMI server and a desktop RMI client. When I restart the server, I get errors in the client. Is it possible to restart the RMI connection without restarting the client? [EDIT] Here is the stacktrace: java.rmi.ConnectException: Connection refused to host: xxx.xxx.xxx.xxx; nested exception is: java.net.ConnectException: Connection refused: connect at ...user code... Caused by: java.rmi.ConnectException: Connection refused to host: xxx.xxx.xxx.xxx; nested exception is: java.net

RPC框架

由 ∥☆過路亽．° 提交于 2019-12-29 23:53:18
RPC框架原理 RPC(remote procedure call,远程过程调用)，一般用来实现部署在不同机器上的系统之间的方法调用，使得程序能够像访问本地资源一样，通过网络传输去访问远端系统资源。 RPC框架实现原理如下图： Client Code：客户端调用方代码实现，负责发起RPC调用，为调用方用户提供使用API。 Seriaization/Deserialization：负责对RPC调用通过网络传输的内容进行序列化和反序列化，不同的RPC框架有不同的实现机制。主要分为文本和二进制两大类。文本类别的序列化机制主要有XML和JSON两种格式，二进制类别的序列化机制常见的有Java原生的序列化机制，以及Hessian、protobuf、Thrift、Avro、Kryo、MessagePack等，不同的序列化方式在可读性、码流大小、支持的数据类型及性能等方面都存在较大差异，需要用户根据自己的实际情况进行甄别与筛选。 Stub Proxy：可以看作一种代理对象，屏蔽RPC调用过程中复杂的网络处理逻辑，使RPC调用透明化，能够保持与本地调用一样的代码风格。 Transport：作为RPC框架底层的通信传输模块，一般通过Socket在客户端与服务器之间传递请求与应答消息。 Server Code：服务端服务业务逻辑具体的实现。 RMI 什么是RMI Java RMI(Remote

RMI lookup works but method invocation not

由 梦想的初衷 提交于 2019-12-29 09:21:03
问题 UPDATE: The problem is, that i'm using a kind of 2-way connection. On client side, this works: String a = this.lobby.getMsg(); and this not: this.lobby.login((Player)UnicastRemoteObject.exportObject(player, 0)); and ideas? I'm working on a java application which uses RMI for network communication. On one computer everythings works good, but if i try to run it via the internet i ran into problems. It seems, that the client is able to retreive the registry from the server and to lookup the

the significance of java RMI please? [closed]

由 不羁岁月 提交于 2019-12-29 05:46:49
问题 As it currently stands, this question is not a good fit for our Q&A format. We expect answers to be supported by facts, references, or expertise, but this question will likely solicit debate, arguments, polling, or extended discussion. If you feel that this question can be improved and possibly reopened, visit the help center for guidance. Closed 6 years ago . Why do people use RMI, or when should I use RMI? I read those tutorials about RMI on oracle's website.But it doesn't provides enough

Is it possible to use RMI bidirectional between two classes?

由 烂漫一生 提交于 2019-12-29 04:43:07
问题 I want to share some information between two classes (A and B), which are running in different java programs. Instead of writing a whole communication protocol I want to use the java build-in rmi classes for that purpose. Currently class B is able to run a method which belongs to class A remotely. Is it somehow possible to use the same "connection" within class A to call a method of class B? Otherwise I probably have to implement a second rmi service ... BR, Markus 回答1: If B implements Remote

Java RMI:Updating client side objects in the server

由 浪尽此生 提交于 2019-12-29 01:51:13
问题 I'm trying to implement a middle-ware for group communication in a distributed system using Java RMI. In there, I need to send an object to the server and modify it. So that changes should be reflected in the client-side. For example, I will give the most common tutorial in the Oracle web site: X.java public class X implements Serializable, Remote{ public int x; // defined as public, just be simple. } Hello.java import java.rmi.Remote; import java.rmi.RemoteException; public interface Hello

docker rmi命令-删除image

由 |▌冷眼眸甩不掉的悲伤 提交于 2019-12-26 09:56:49
rmi 删除image Usage: docker rmi IMAGE [IMAGE...]Remove one or more images -f,--force=falseForce removal of the image --no-prune=falseDonotdelete untagged parents Removing tagged images Images can be removed either by their short or long ID`s, or their image names. If an image has more than one name, each of them needs to be removed before the image is removed. $ sudo docker images REPOSITORY TAG IMAGE ID CREATED SIZE test1 latest fd484f19954f 23 seconds ago 7 B (virtual4.964 MB) test latest fd484f19954f 23 seconds ago 7 B (virtual4.964 MB) test2 latest fd484f19954f 23 seconds ago 7 B (virtual4

How to solve java.security.AccessControlException

由 ﹥＞﹥吖頭↗ 提交于 2019-12-25 17:15:16
问题 I need suggestions concerning the java.security.AccessControlException , I get when executing the following code. (I have consulted similar questions here but didn't success to make it work) Here is my server code: public class GetPageInfos extends UnicastRemoteObject implements RemoteGetInfo{ private static final String url="http://www.lemonde.fr/"; public class GetPageInfos extends UnicastRemoteObject implements RemoteGetInfo{ private static final String url="http://www.lemonde.fr/"; public

Why is my RMI/SSL client authentication not working?

由 泪湿孤枕 提交于 2019-12-25 08:47:45
问题 I did the following things: + generate keystore.jks with keytool + exported keystore.cer file with keytool + imported keystore.cer file into truststore.jks + copied keystore.jks and keystore.cer to the client Then I call my server with -Djavax.net.ssl.trustStore=truststore.jks -Djavax.net.ssl.trustStorePassword=* and my client with -Djavax.net.ssl.keyStore=forclient.jks -Djavax.net.ssl.keyStorePassword=* The server exposes its interface with the super() call of UnicastRemoteObject super(PORT,
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