Java RMI server call another RMI server - rmi

is it possible to have a RMI server where I can call another RMI server? I want to have a client to connect to first RMI server, get some data and send the data to second RMI server, which insert data to DB?

Related

Scalling Socket.IO using Postgre Adapter, one server cannot send message to another server

Using postgres adapter not receive message from another server, but successfully with redis adapter,
here my code..
Postgresql Code
Anyone can fix this ??
Expect for close my problem

Is client-server option is available in Wiremock.

I am trying to validate server-client connectivity. I am running the client in one system and server in other system. When i manually running the Wiremock server in client system, i am able to see the responses from Server. My question here is "How to run the Wiremock Server in Server system via client System".

Difference between server connection and server instance?

I was using MySQL Workbench and I am not able to figure out the difference between the following:
1. Server instance
2. Connection to server
In general I want to know if we can use Open Connection to start querying without creating
a server instance of the connection we are trying to connect. Are these two things independent?
You need one or two connections depending on what you wanna do with your server. For MySQL work (i.e. running queries) you need a MySQL connection. For server work (e.g. shutting the MySQL server down or manage other aspects that require shell access) you need a second connection (which is called a Server Instance).
Beginning with MySQL Workbench 6.0 we merged both connection settings into one interface.

Can RMI(JRMP) server be called by RMI IIOP?

Can RMI (JRMP) server be called by RMI IIOP?
I know that RMI IIOP is used for cross language communication using corba, But can RMI server implemented using JRMP be called by RMI IIOP client?
I'm guessing this is possible by using the IP address of RMI (JRMP) registry host.
No. The question doesn't even make sense. An RMI server is called via its stub, and the protocol is implemented by the stub, not the client.
However you can export the same object as both an RMI/JRMP remote object and an RMI/IIOP remote object, by extending neither UnicastRemoteObject nor PortableRemoteObject and calling the exportObject() methods of both those classes, and registering it in both an RMI Registry and a COSNaming service, and running both rmic (if necessary, see the preamble to UnicastRemoteObject) and rmic -iiop.
Then if you look it up via a Registry you get an RMI/JRMP stub, and if you look it up via a COSNaming service you get an RMI/IIOP stub.

Two (or more) socket client connections on one machine

I have a simple node.js client and server programs running on one machine and when I try to connect to the server with second instance of client program simultaneously I get EADDRINUSE, Address already in use error. Is it possible to have two or more TCP based socket client connections (created with createConnection) to one server (created with createServer) on the same machine, or only one client program can be connected to the server at the same time?
Yes, it's possible. Infact, very common. Many applications open dozens, or hundreds of connections to the same server. It sounds like your client program is binding on a port. Only the server should be binding on a port. You should verify.
The client will usually use a random port between 1024-65535, as assigned by your OS. You don't need to worry about it. Since the client is initiating a connection to the server, the server port must unique to one program. Which is why your problem signifies you are trying to start the server twice. Please see http://www.tcpipguide.com/free/t_TCPIPClientEphemeralPortsandClientServerApplicatio.htm