Probably because if you're only using just one or the other in your app (data management or remoting) those would be the preferred default channels. But if you're using multiple services in the same app, which is common, you'd want to avoid defining unique channels for each service and instead use a common set of default channels across all of them. The docset for the upcoming 2.6 release does a much better job of explaining much of this than the current docs do.
Best, Seth From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of Robert Csiki Sent: Friday, May 16, 2008 2:22 PM To: [email protected] Subject: [flexcoders] Re: LCDS and channel usage Do you know why the template LCDS WAR uses RTMP channel in data-management-config.xml and the AMF one in remoting-config.xml? Thanks, Robert --- In [email protected], "Seth Hodgson" <[EMAIL PROTECTED]> wrote: > > Hi Robert, > > What's the specific error message you're seeing and where are you seeing it? > If your amf channel is configured to poll you should be fine, and if it's > not, as long as DataService.autoSyncEnabled = false you'll still be fine. > Otherwise, I'd except you to get a warning in the client log, but no errors. > > Best, > Seth > > From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of > Robert Csiki > Sent: Friday, May 16, 2008 1:33 PM > To: [email protected] > Subject: [flexcoders] Re: LCDS and channel usage > > Thanks Seth, this really helps and your comments are very detailed and > useful. I really appreciate these comprehensive comments of yours! > I have a question though, in regards to your statement that "Any channel type > ! can be used with any service component" and whit the example of a > DataService using the AMFChannel. > I tried the default AMF Channel configured in LCDS xml files (the one with id > = "my-amf") as the channel to be used by my DataService object. I got an > error saying the DataService can't use this AMF channel. The same channel is > successfully used by my RemoteObject class. > I wonder why DataService can't use the AMF Channel in my case? > Thanks, Robert > > --- In [email protected], "Seth Hodgson" shodgson@ wrote: > > > > Hi Robert, > > > > Chances are you're trying to use DataService with auto-sync enabled over an > > AMFChannel that doesn't have polling enabled; if that's the case you won't > > receive any pushed updates. Auto-sync can be disabled for a DataService > > (say you're just doing CRUD interactions with the server and don't need > > pushed data in your app), and in that scenario usi! ng an AMFChannel with > > polling disabled works fine. > >! ; &g t; > Any channel type can be used with any service component. There's a general overview of the channel options and why you'd prefer one over another here, and the doc team is currently working on lots of improvements to the official docset in these areas: http://www.dcooper.org/blog/client/index.cfm?mode=entry&entry=8E1439AD-4E22-1671-58710DD528E9C2E7 > > > > In terms of whi! ch channels are used by the client to interact with the > > server, this is defined by the order that Channels are assigned to your > > client-side ChannelSet (if you set things up directly in code). > > Or in the more automatic case, it's based on your services-config.xml file > > <default-channels> config, or a specific service's <default-channels> or a > > specific destination's <channels>. The best practice is to just define this > > list once at the top level in services-config.xml within the <services> > > section:> > <services> > > ... > > <default-channels> > > <channel ref="rtmp"/> > > <channel ref="amf-polling"/> > > </default-channels> > > </services> > > This default setting is applied to all services and destinations, unless > > you override at a specific service or destination. There's really no good > > use case to do that though, so just define the set of channels clients s! > > hould use here at the top level. This list of Channels is what! is "bur > > ned" into your swf when you compile with the -services option, and it's > > used to dynamically construct a ChannelSet on the client at runtime. > > > > There's no magic in the ChannelSet to determine which Channel from among > > the set to connect with - it starts with the first, and advances through > > until it successfully connects. If it looses connectivity, it continues > > through the list from its current position. So t! his component provides > > reconnect and high-availability by fall! ing back through its options. So > > for the example above, the client will first try to connect via RTMP to > > your server-side RTMP endpoint's URL, and if that fails (say the client has > > a firewall blocking that port), it will fall back to a connect attempt over > > your AMFChannel (which has polling enabled). > > > > Hope that helps, > > Seth > > > > From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of > > Robert Csiki > > Sent: Friday, May 1! 6, 2008 8:33 AM > > To: [email protected] > > Subject: [flexcoders] LCDS and channel usage > > > > Hi there, > > What channels are compatible with what service objects? For instance, I > > noticed the AMF family is not good for DataService. If you know of a ling > > that contains this service/channel matrix, I'd appreciate if you'll point > > it to me. > > Also: for each of the available! services (DataService, HttpService, > > WebService, RemoteService), whenever they support multiple channels, what's > > the order these channels are being tried by the framework? Is this order > > configurable? How the framework decides the channel to use (the "current > > channel")? > > Thanks, Robert > > >
