How to send message to Client about Server shutdown.

I have made a Chatting Application using RMI.
I need to send messages to all the Clients when a Server shutdowns abnormally.
One way is that I use shutdown hook on the Server Application.
But, what if the power of the machine on which server is running goes off. How will the Client get to know that server is down.
I also want that If a Client shutdowns abnormally,it should send the message to the Server which in turn will send message to other Clients about the particular Client.
Thanks & Regards.
Nimesh

Before you make any call form client to server check that sever is available. This is easily done by intorudciing an rmi method that will return true e.g m_sever.isAvalable(); if server is availbel you will get ture if not then you will get an RMI Excpetion which you then trap and attemp to reconnect to the server (NAming.lookup() ) .. if several attempts fail then assume server is down.
When a client dies it throws an excpetion on the sErver :
java.net.SocketException: Connection reset by peer: JVM_recv in socket input stream read
     at java.net.SocketInputStream.socketRead0(Native Method)
     at java.net.SocketInputStream.read(SocketInputStream.java:116)
     at java.io.BufferedInputStream.fill(BufferedInputStream.java:183)
     at java.io.BufferedInputStream.read(BufferedInputStream.java:201)
     at java.io.FilterInputStream.read(FilterInputStream.java:66)
     at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:442)
     at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:701)
     at java.lang.Thread.run(Thread.java:536)
trap this and deal with it appropriatly.
hope this helps.
Charbel.

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Before you make any call form client to server check that sever is available. This is easily done by intorudciing an rmi method that will return true e.g m_sever.isAvalable(); if server is availbel you will get ture if not then you will get an RMI Excpetion which you then trap and attemp to reconnect to the server (NAming.lookup() ) .. if several attempts fail then assume server is down.
When a client dies it throws an excpetion on the sErver :
java.net.SocketException: Connection reset by peer: JVM_recv in socket input stream read
     at java.net.SocketInputStream.socketRead0(Native Method)
     at java.net.SocketInputStream.read(SocketInputStream.java:116)
     at java.io.BufferedInputStream.fill(BufferedInputStream.java:183)
     at java.io.BufferedInputStream.read(BufferedInputStream.java:201)
     at java.io.FilterInputStream.read(FilterInputStream.java:66)
     at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:442)
     at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:701)
     at java.lang.Thread.run(Thread.java:536)
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