Server replication (Jgroups)

[enrico96]

Hi ,

I m new in this forum, so sorry if I posted this thread in wrong place.
I m working on a client/server chat application and I would like to replicate my server so in case it crashes ,the client shouldn't notice the crashing because the connection would be transmited to other server. I know that one way is by using jgroups , but I have know idea how to do it. Can anyone help me on that and give some information?


Thanks in advance!

[pbrockway2]

I had never heard of it before, but have you tried the JGroups Tutorial? It describes a crash-proof chat application -

"The goal of this chapter is to write a simple text-based chat application (SimpleChat), with the following features:

* All instances of SimpleChat find each other and form a cluster.
* There is no need to run a central chat server to which instances have to connect. Therefore, there is no single point of failure.
* A message is sent to all instances of the cluster.
* An instance gets a notification callback when another instance leaves (or crashes) and when other instances join.
* (Optional) We maintain a common cluster-wide shared state, e.g. the chat history. New instances acquire that history from existing instances."

[enrico96]

Hi thanks for the link but it didn't help me a lot. I forgot to say that I m using RMI for this application, so I was just wondering if there is any other way to replicate the server. The whole idea is when my server crashes, the connection of the server with the clients must NOT be lost, but has to be transmited to another server (and so on...). In this way the client cannot realize that the server crashes and the most important , all the data are not being lost

[Klauspinto]

Replication is a set of technologies for copying and distributing data and database objects from one database to another. With Replication Server, your business can leverage existing applications across multiple locations and geographies.