public CommandAwareRpcDispatcher(
Channel channel,
JGroupsTransport transport,
ExecutorService asyncExecutor,
TimeService timeService,
InboundInvocationHandler globalHandler) {
this.server_obj = transport;
this.asyncExecutor = asyncExecutor;
this.transport = transport;
this.timeService = timeService;
this.handler = globalHandler;
// MessageDispatcher superclass constructors will call start() so perform all init here
this.setMembershipListener(transport);
this.setChannel(channel);
// If existing up handler is a muxing up handler, setChannel(..) will not have replaced it
UpHandler handler = channel.getUpHandler();
if (handler instanceof Muxer<?>) {
@SuppressWarnings("unchecked")
Muxer<UpHandler> mux = (Muxer<UpHandler>) handler;
mux.setDefaultHandler(this.prot_adapter);
}
channel.addChannelListener(this);
asyncDispatching(true);
}
/**
* Sets the given UpHandler as the UpHandler for the channel, or, if the channel already has a
* Muxer installed as it's UpHandler, sets the given handler as the Muxer's {@link
* Muxer#setDefaultHandler(Object) default handler}. If the relevant handler is already installed,
* the <code>canReplace</code> controls whether this method replaces it (after logging a WARN) or
* simply leaves <code>handler</code> uninstalled.
*
* <p>Passing <code>false</code> as the <code>canReplace</code> value allows callers to use this
* method to install defaults without concern about inadvertently overriding
*
* @param handler the UpHandler to install
* @param canReplace <code>true</code> if an existing Channel upHandler or Muxer default upHandler
* can be replaced; <code>false</code> if this method shouldn't install
*/
protected void installUpHandler(UpHandler handler, boolean canReplace) {
UpHandler existing = channel.getUpHandler();
if (existing == null) {
channel.setUpHandler(handler);
} else if (existing instanceof Muxer<?>) {
@SuppressWarnings("unchecked")
Muxer<UpHandler> mux = (Muxer<UpHandler>) existing;
if (mux.getDefaultHandler() == null) {
mux.setDefaultHandler(handler);
} else if (canReplace) {
log.warn(
"Channel Muxer already has a default up handler installed ("
+ mux.getDefaultHandler()
+ ") but now it is being overridden");
mux.setDefaultHandler(handler);
}
} else if (canReplace) {
log.warn(
"Channel already has an up handler installed ("
+ existing
+ ") but now it is being overridden");
channel.setUpHandler(handler);
}
}
