Michael Bayne
6663aae772
git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@67 542714f4-19e9-0310-aa3c-eee0fc999fb1
78 lines
2.5 KiB
Java
78 lines
2.5 KiB
Java
//
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// $Id: InvocationManager.java,v 1.1 2001/07/19 05:56:20 mdb Exp $
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package com.threerings.cocktail.cher.server;
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import com.threerings.cocktail.cher.Log;
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import com.threerings.cocktail.cher.dobj.*;
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/**
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* The invocation services provide client to server invocations (service
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* requests) and server to client invocations (responses and
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* notifications). Via this mechanism, the client can make requests of the
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* server, be notified of its response and the server can asynchronously
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* invoke code on the client.
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*
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* <p> Invocations are like remote procedure calls in that they are named
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* and take arguments. They are simple in that the arguments can only be
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* of a small set of supported types (the set of distributed object field
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* types) and there is no special facility provided for referencing
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* non-local objects (it is assumed that the distributed object facility
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* will already be in use for any objects that should be shared).
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*
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* <p> The server invocation manager listens for invocation requests from
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* the client and passes them on to the invocation provider registered for
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* the requested invocation type. It also provides a mechanism by which
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* responses and asynchronous notification invocations can be delivered to
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* the client.
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*/
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public class InvocationManager
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implements Subscriber
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{
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public InvocationManager (DObjectManager omgr)
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{
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_omgr = omgr;
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// create the object on which we'll listen for invocation requests
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omgr.createObject(DObject.class, this, true);
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}
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public int getOid ()
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{
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return _invoid;
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}
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public void objectAvailable (DObject object)
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{
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// this must be our invocation object
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_invoid = object.getOid();
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}
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public void requestFailed (int oid, ObjectAccessException cause)
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{
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// if for some reason we were unable to create our invocation
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// object, we'll end up here
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Log.warning("Unable to create invocation object " +
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"[reason=" + cause + "].");
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_invoid = -1;
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}
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public boolean handleEvent (DEvent event, DObject target)
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{
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// we shouldn't be getting non-message events, but check just to
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// be sure
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if (!(event instanceof MessageEvent)) {
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Log.warning("Got non-message event!? [evt=" + event + "].");
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return true;
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}
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MessageEvent mevt = (MessageEvent)event;
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// make sure the name is proper just for sanities sake
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return true;
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}
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protected DObjectManager _omgr;
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protected int _invoid;
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}
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