Michael Bayne
ba4985053f
sensible a way as we can hope for. git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@1717 542714f4-19e9-0310-aa3c-eee0fc999fb1
68 lines
2.8 KiB
Java
68 lines
2.8 KiB
Java
//
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// $Id: ClientObserver.java,v 1.6 2002/09/19 23:36:59 mdb Exp $
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package com.threerings.presents.client;
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/**
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* A client observer is a more detailed version of the {@link
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* SessionObserver} for entities that are interested in more detail about
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* the logon/logoff process.
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*
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* <p> In the normal course of affairs, <code>clientDidLogon</code> will
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* be called after the client successfully logs on to the server and
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* <code>clientDidLogoff</code> will be called after the client logs off
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* of the server. If logon fails for any reson,
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* <code>clientFailedToLogon</code> will be called to explain the failure.
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*
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* <p> <code>clientWillLogoff</code> will only be called when an abortable
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* logoff is requested (like when the user clicks on a logoff button of
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* some sort). It will not be called during non-abortable logoff requests
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* (like when the browser calls stop on the applet and is about to yank
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* the rug out from under us). If an observer aborts the logoff request,
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* it should notify the user in some way why the request was aborted
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* (<em>but it shouldn't do so on the thread that calls
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* <code>clientWillLogoff</code></em>).
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*
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* <p> If the client connection fails unexpectedly,
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* <code>clientConnectionFailed</code> will be called to let the
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* observers know that we lost our connection to the
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* server. <code>clientDidLogoff</code> will be called immediately
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* afterwards as a normal logoff procedure is effected.
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*
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* <p> These callbacks happen on the client thread and should therefore
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* not be used to perform any complex action or do much more than relay
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* the signal to some other thread (like the AWT thread) to act more fully
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* on the notice.
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*/
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public interface ClientObserver extends SessionObserver
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{
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/**
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* Called if anything fails during the logon attempt. This could be a
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* network failure, authentication failure or otherwise. The exception
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* provided will indicate the cause of the failure.
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*/
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public void clientFailedToLogon (Client client, Exception cause);
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/**
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* For systems that allow switching screen names after logon, this
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* method is called whenever a screen name change takes place to
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* report that the client object has been replaced to potential
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* client-side subscribers.
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*/
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public void clientObjectDidChange (Client client);
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/**
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* Called when the connection to the server went away for some
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* unexpected reason. This will be followed by a call to
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* <code>clientDidLogoff</code>.
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*/
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public void clientConnectionFailed (Client client, Exception cause);
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/**
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* Called when an abortable logoff request is made. If the observer
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* returns false from this method, the client will abort the logoff
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* request.
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*/
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public boolean clientWillLogoff (Client client);
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}
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