I found the problem and now pushing to the client works!!
In the controller that creates the channel, I just need create the
service and use the same id on the client. Whatever is returned by the
create channel method is not the id that I need to use to send the
message.
So this:
> ChannelService channelService =
> ChannelServiceFactory.getChannelService();
>
> String channelId = channelService.createChannel("coupoz");
>
> return new ChannelModel(channelId);
becomes:
ChannelService channelService =
ChannelServiceFactory.getChannelService();
channelService.createChannel("coupoz");
return OK_RESPONSE;
On the client, I just change:
> var channel = new goog.appengine.Channel(channelId);
to be:
var channel = new goog.appengine.Channel("coupoz");
The push then works great, which is really all I needed, but I am
interested in how to receive though.
On Nov 24, 8:52 pm, Scott <shathaw...@gmail.com> wrote:
> I am trying to use the Channel API in the 1.4.0 preview, but I am not
> using GWT. Here is what I have done so far:
>
> 1. Using the Spring framework I have a controller that listens for a
> channel create request form a client to create a new channel. The
> controller creates the channel using the following code:
>
> ChannelService channelService =
> ChannelServiceFactory.getChannelService();
>
> String channelId = channelService.createChannel("coupoz");
>
> return new ChannelModel(channelId);
>
> 2. The client, which imports the "_ah/channel/jsapi" script, then
> creates a channel and opens a socket using the channel id returned by
> the controller. Here is the client code:
>
> var channel = new goog.appengine.Channel(channelId);
> var socket = channel.open();
> socket.onopen = function() {}
> socket.onmessage = function(evt) {
> var o = JSON.parse(evt.data);
> alert(o);
> }
>
> 3. I then have a button that I can push from the client that calls
> another controller that sends a message to the client via the channel.
> I am sending back the channel id in the call from the client. Here is
> the code:
>
> ChannelService channelService =
> ChannelServiceFactory.getChannelService();
> channelService.sendMessage(new
> ChannelMessage(channelId,"test"));
>
> This seems bassackwards but when I tried just sending from the client
> using socket.send and got the error below. Plus I have no idea to
> listen for the send on the server side.
>
> WARNING: /_ah/channel/dev
> com.google.appengine.api.channel.dev.LocalChannelFailureException:
> Channel for application key null not found.
>
> When I try pushing to the client I get the following error:
> com.google.appengine.api.channel.ChannelFailureException: An
> unexpected error occurred.
> .
> .
> .
> Caused by: com.google.apphosting.api.ApiProxy$ApplicationException:
> ApplicationError: 2:
> at
> com.google.appengine.api.channel.dev.LocalChannelService.sendChannelMessage
> (LocalChannelService.java:
> 91)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> .
> .
> .
>
> Any tips or suggestions?
>
> Thanks!
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