I open two clients, and trying to send a message from one to another.
So i have two requests hanging on server's side, and the third one
trying to send the message.
the server side is like this :
@Override
public ArrayList<Event> getEvents( Integer sessionId )
{
UserInfo user = getUserById( sessionId );;
ArrayList< Event > events = null ;
if( user != null )
{
if( user.events.size() == 0 )
{
try
{
synchronized( user )
{
user.wait( 20*1000 );
}
}
catch ( InterruptedException ignored ) {}
}
synchronized( user )
{
events = user.events;
user.events = = new ArrayList<Event>(); ;
}
}
return events;
}
And the sendEvent() on the server side is like this :
@Override
public void sendEvent( Integer senderId, Integer recieverId, String
message )
{
System.out.println( senderId + "entered the sendMessage
method" );
UserInfo reciever = getUserById( recieverId );
MessageEvent me = new MessageEvent( senderId , message );
if( reciever != null )
{
synchronized( reciever )
{
reciever.events.add( me );
reciever.notifyAll();
}
}
}
So I have two clients opened in hosted mode. For debugging
i put System.out.println( senderId + "entered the sendEvent method" );
command at the enter
to sendEvent() method. And the message "senderId entered the sendEvent
method" appeared, only when
one of the clients exited the getEvents(). So maybe the problem is
that both clients are opened at the same
computer, or maybe it's because of hosted mode ?
On Apr 22, 11:56 pm, Vitali Lovich <[email protected]> wrote:
> Most browsers only support 2 outstanding AJAX events - that may be what you
> are running into. Without knowing what other calls you make, I cannot make
> a recommendation.
>
> One thing that does come to mind is that I hope you only call getEvents once
> on startup.
>
> On Wed, Apr 22, 2009 at 4:47 PM, [email protected]
> <[email protected]>wrote:
>
>
>
> > Hi.
> > I'm trying to implement chat on my GWT app. So client has getEvents()
> > function implemented like this :
>
> > public void getEvents( )
> > {
> > networkSvc.getEvents(
> > new AsyncCallback< ArrayList<Event> >()
> > {
> > public void onSuccess( ArrayList< Event >
> > events )
> > {
> > handleEvents( events );
> > networkSvc.getEvents( this );
> > }
> > public void onFailure( Throwable caught )
> > {
> > System.out.println("eventListner " +
> > caught );
> > }
> > }
> > );
> > }
>
> > This func in an endless loop with the server .
> > at the server side getEvents goes to sleep for 30 sec or till events
> > approaching.
> > The second function is sendEvent() function.
> > As i see, i can't send an event to server while the server processing
> > the previos request.
> > I mean it looks like the sendEvent() waits till the getEvents() gets
> > the response,
> > and just after that it sends its own request.
> > Is that right, or there is some bug in my algorithm ?
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