My AMF channel seem to be a polling one

Hello everyone.
When i'm trying to use a simple amf channel for my messaging service, it looks like that some king of polling is happening instead. I'm testing this on simple chat application, and when i'm sending, for example, 4 message in a row I have to wait few second to see them appear in the right place.
Beside that i'm not doing anything, once i have subscribed to the destination, i can see in the blazeds log that the same messaging action is going over and over. Here is a sample of the log
[BlazeDS] Channel endpoint my-lol received request.
[BlazeDS] Deserializing AMF/HTTP request
Version: 3
(Message #0 targetURI=null, responseURI=/99)
(Array #0)
[0] = (Externalizable Object #0 'flex.messaging.messages.CommandMessageExt')
(Object #1)
(Object #2)
DSId = "5669DA6B-360B-0DB5-61E4-2B7EF19B15B5"
(Byte Array #3, Length 16)
2
[BlazeDS] Before handling general client poll request.
incomingMessage: Flex Message (flex.messaging.messages.CommandMessageExt)
operation = poll
clientId = null
correlationId =
destination =
messageId = AFDBF526-C039-0761-A2CD-CF71C19A7061
timestamp = 1223251050921
timeToLive = 0
body = {}
hdr(DSEndpoint) = my-lol
hdr(DSId) = 5669DA6B-360B-0DB5-61E4-2B7EF19B15B5
[BlazeDS] After handling general client poll request.
reply: Flex Message (flex.messaging.messages.AcknowledgeMessage)
clientId = null
correlationId = null
destination = null
messageId = 5674B9CD-9919-6D3D-2E72-A81BC9E2866B
timestamp = 1223251050921
timeToLive = 0
body = null
[BlazeDS] Serializing AMF/HTTP response
Version: 3
(Message #0 targetURI=/99/onResult, responseURI=)
(Externalizable Object #0 'DSK')
1.223251050921E12
(Byte Array #1, Length 16)
And so on ! (only the Id are changing)
Again i'm doing simple things here, I have a producer and a consumer with the same destination "chat". This destination is using a channel named "my-lol" but it's a copy of the default "my-amf" one.
Can you explain to me what is happening ?
Thank you

As you know, to use a Consumer you'll need a channel capable of push (or at least one that can simulate it) in order to receive updates. The AMFChannel sends and receives AMF messages over HTTP, so if you want to received pushed messages you'll either need a long lived connection or some method of polling at a reasonable interval to simulate it.
While LCDS more channels than BlazeDS, I suggest reading Seth's documentation on the pros and cons of each kind of channel so that you can pick which approach you want based on your needs and application environment.
http://www.dcooper.org/Blog/client/index.cfm?mode=entry&entry=8E1439AD-4E22-1671-58710DD52 8E9C2E7
Pete
From: Jordan Amar [mailto:[email protected]]
Sent: Sunday, October 05, 2008 8:10 PM
To: [email protected]
Subject: my AMF channel seem to be a polling one
A new discussion was started by Jordan Amar in
Configuration and Getting Started Discussion --
my AMF channel seem to be a polling one
Hello everyone.
When i'm trying to use a simple amf channel for my messaging service, it looks like that some king of polling is happening instead. I'm testing this on simple chat application, and when i'm sending, for example, 4 message in a row I have to wait few second to see them appear in the right place.
Beside that i'm not doing anything, once i have subscribed to the destination, i can see in the blazeds log that the same messaging action is going over and over. Here is a sample of the log
[BlazeDS] Channel endpoint my-lol received request.
[BlazeDS] Deserializing AMF/HTTP request
Version: 3
(Message #0 targetURI=null, responseURI=/99)
(Array #0)
[0] = (Externalizable Object #0 'flex.messaging.messages.CommandMessageExt')
(Object #1)
(Object #2)
DSId = "5669DA6B-360B-0DB5-61E4-2B7EF19B15B5"
(Byte Array #3, Length 16)
2
[BlazeDS] Before handling general client poll request.
incomingMessage: Flex Message (flex.messaging.messages.CommandMessageExt)
operation = poll
clientId = null
correlationId =
destination =
messageId = AFDBF526-C039-0761-A2CD-CF71C19A7061
timestamp = 1223251050921
timeToLive = 0
body = {}
hdr(DSEndpoint) = my-lol
hdr(DSId) = 5669DA6B-360B-0DB5-61E4-2B7EF19B15B5
[BlazeDS] After handling general client poll request.
reply: Flex Message (flex.messaging.messages.AcknowledgeMessage)
clientId = null
correlationId = null
destination = null
messageId = 5674B9CD-9919-6D3D-2E72-A81BC9E2866B
timestamp = 1223251050921
timeToLive = 0
body = null
[BlazeDS] Serializing AMF/HTTP response
Version: 3
(Message #0 targetURI=/99/onResult, responseURI=)
(Externalizable Object #0 'DSK')
1.223251050921E12
(Byte Array #1, Length 16)
And so on ! (only the Id are changing)
Again i'm doing simple things here, I have a producer and a consumer with the same destination "chat". This destination is using a channel named "my-lol" but it's a copy of the default "my-amf" one.
Can you explain to me what is happening ?
Thank you
View/reply at my AMF channel seem to be a polling one
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Similar Messages

[svn:bz-trunk] 8678: Bug: BLZ-255 - trader desktop sample with per-client-qos-polling-amf channel is confusing

Revision: 8678
Author:   [email protected]
Date:     2009-07-20 01:20:31 -0700 (Mon, 20 Jul 2009)
Log Message:
Bug: BLZ-255 - trader desktop sample with per-client-qos-polling-amf channel is confusing
QA: No
Doc: No
Ticket Links:
    http://bugs.adobe.com/jira/browse/BLZ-255
Modified Paths:
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AMF Channel - Project Relocation Issue

The problem I'm having came up when I tried moving a working BlazeDS/Flex/Java project on my local machine to a remote server. The way I've set up the server is with user directories (~username) style so I wanted to move my BlazeDS project under that directory (so the access url for the project would be something like: http://ip_address:8080/~username/blazeProject )
So I moved the project folder into the ~username subfolder of my web directory. When I moved the project there I started having problems with my AMF channel when I tried to use the RemoteObject communications that worked locally but now don't. This is the fault information I received:
>(mx.rpc::Fault)#0
errorID = 0
faultCode = "Client.Error.MessageSend"
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rootCause = (mx.messaging.events::ChannelFaultEvent)#1
bubbles = false
cancelable = false
channel = (mx.messaging.channels::AMFChannel)#2
authenticated = false
channelSets = (Array)#3
[0] (mx.messaging::ChannelSet)#4
authenticated = false
channelIds = (Array)#5
[0] "my-amf"
channels = (Array)#6
[0] (mx.messaging.channels::AMFChannel)#2
clustered = false
connected = false
currentChannel = (mx.messaging.channels::AMFChannel)#2
initialDestinationId = (null)
messageAgents = (Array)#7
[0] (mx.rpc::AsyncRequest)#8
authenticated = false
autoConnect = true
channelSet = (mx.messaging::ChannelSet)#4
clientId = (null)
connected = false
defaultHeaders = (null)
destination = "remoteReference"
id = "245BCB93-2D25-4C42-D6F7-92948FE615C8"
reconnectAttempts = 0
reconnectInterval = 0
requestTimeout = -1
subtopic = ""
connected = false
connectTimeout = -1
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failoverURIs = (Array)#9
id = "my-amf"
mpiEnabled = false
netConnection = (flash.net::NetConnection)#10
client = (mx.messaging.channels::AMFChannel)#2
connected = false
objectEncoding = 3
proxyType = "none"
uri = "http://192.168.111.201:8080/blazeProject/messagebroker/amf"
piggybackingEnabled = false
polling = false
pollingEnabled = true
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protocol = "http"
reconnecting = false
recordMessageSizes = false
recordMessageTimes = false
requestTimeout = -1
uri = "http://{server.name}:{server.port}/blazeProject/messagebroker/amf"
url = "http://{server.name}:{server.port}/blazeProject/messagebroker/amf"
useSmallMessages = false
channelId = "my-amf"
connected = false
currentTarget = (mx.messaging.channels::AMFChannel)#2
eventPhase = 2
faultCode = "Channel.Connect.Failed"
faultDetail = "NetConnection.Call.Failed: HTTP: Status 404: url: 'http://192.168.111.201:8080/blazeProject/messagebroker/amf'"
faultString = "error"
reconnecting = false
rejected = false
rootCause = (Object)#11
code = "NetConnection.Call.Failed"
description = "HTTP: Status 404"

>        details = "http://192.168.111.201:8080/blazeProject/messagebroker/amf"
        level = "error"
      target = (mx.messaging.channels::AMFChannel)#2
    type = "channelFault"
Whoops that's not the right endpoint for the channel! Instead of "http://192.168.111.201:8080/blazeProject/messagebroker/amf", I want http://192.168.111.201:8080/~username/blazeProject/messagebroker/amf" right? So I went into my services-config file and changed the my-amf endpoint url to "". Hmm, I'm still running into the same fault as above except that the endpoint url is now "http://192.168.111.201:8080/~username/blazeProject/messagebroker/amf".
Changed:
>
To:
>
I've also tried hard coding an absolute url in there to no avail:
>
I've tried setting up a similar username subfolder setup on my local machine and am getting the same error so it must be something in my configuration files that is amiss. It looks like my Flex code is looking for the AMF channel in the right place, but it the server side stuff isn't setting it up properly (when I navigate to "http://192.168.111.201:8080/~username/blazeProject/messagebroker/amf" in a browser it returns a 404 response when a 200 response is expected). Any idea where I'm missing that code? I've been looking at the web.xml file and am thinking that the solution may be in the servlet-mapping there, but I'm not sure how I would change that to do what I wish.
I've done a lot of tinkering and can't seem to find a solution myself, so I'm hoping someone on here can steer me in the right direction! Any suggestions would be greatly appreciated!
One other thing: I've read that sometimes this error is thrown when there are initialization errors when deploying the project, but I've checked the server logs and that's not the case here...

Java Remoting over AMF channel slow from internet

Hi
We have a Flex app that uses an AMF channel to call a Java object on LCDS. The LCDS is a default 2.5.1 install on windows, running the built in JBOSS server.
When we run the flex client on the lan, response is excellent. When we call it from outside the firewall, we get a 5 to 7 second delay on the all Java calls. The app also uses SQL assember, but we dont see any perfomance issue with the data service calls.
The LCSD server is behind our firewall, and we are doing simple port forwarding of 8700 and 2038 to enable access from outside teh firewall.
To test, I set up a very simple java method, and if I call it from a pc on the lan I get an instant response. If I call it via the internet, I get a 5 second delay. This shows that bandwidth is not the issue.
My suspicion is that the problem is with polling on a simple amf channel. I tried to setup a streamingAMFchannel, but got a class not found error. I set up long polling, but got the same result.
Here is more background:
I created a simple java method:
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I call this from a form
<?xml version="1.0" encoding="utf-8"?>
<mx:Canvas xmlns:mx="http://www.adobe.com/2006/mxml" width="400" height="300">
      <mx:RemoteObject
            id="testBed"
            destination="testBed">
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      </mx:RemoteObject>
            <mx:Script><![CDATA[
            private function ping():void {
                  var date:Date = new Date();
                  msgBox.text=msgBox.text+"Calling ping at "+date.toLocaleTimeString()+" "+date.getMilliseconds()+"\n"
                  testBed.ping()
                  date = new Date();
                  msgBox.text=msgBox.text+"Ping called at "+date.toLocaleTimeString()+" "+date.getMilliseconds()+"\n"
            private function pingHandler(result):void {
                  var date:Date = new Date();
                  msgBox.text=msgBox.text+"Ping returned at "+date.toLocaleTimeString()+" "+date.getMilliseconds()+"\n"
                  msgBox.text=msgBox.text+"Ping returned   :"+result+"\n"
            }     ]]>   </mx:Script>
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            <mx:TextArea x="19" y="10" width="371" height="250" id="msgBox" text=""/>
</mx:Canvas>
When I run over the net I get
Calling ping at 04:19:11 PM 593
Ping called at 04:19:11 PM 593
Ping returned at 04:19:16 PM 562
Which is a 5 second delay
I have attached my config files.
Any suggestions would be appreciated.
Cheers
James

Can you give a little more information on the architecture of your application layers and where do they run?
Do you use ADF BC? Are they running on the client machine or on a server through EJB?
Also does running a form that doesn't connect to the DB also slow on the remote clients?
You can try to use the profiler in JDeveloper to monitor your application and see which events takes place when.

AMF channel return object format

Hey,
I am working with BlazeDS and JBoss 5.
In Jboss I have AuthentificationFilter before Remote Objects... So each request must pass throw this filter.
On server side:
In the filter I am checking login session data and if it is ok ,it passes to Remote Object.
If not I make following :
httpResponse.getWriter().write("Session Invalid");
On flex side :
I get fault result from server, and I don't see "Session invalid" string. I have the fault of Bad Version, because it is not AMF Channel , I quess.
The question is how can I get String from this filter ???
Thanks a lot!

Hello,
I wanted to start a new post but when reading this post, I think it is the same kind of issue I am facing for a few days now.
I am using WebSphere (v6.1) and Java (EJB 2...) with Flex 3.4 as the frontend talking to BlazeDS.
In some cases based on properties, my application (EJBs) should still be available but the UI (Flex) should be disabled.
Throwing java exception in the (java) services methods works just fine since you can get the exception in Flex through the fault rootCause but I need/want to block the Flex app/calls before that...
To do so, I thought that a (java) ServletFilter added in the web.xml would be the right place to process this check.
If the properties says that the UI should not be accessed before launching the application frontend it is working just great. Indeed I am calling a servlet that will display the flash <object ...> but the filter is able to return an HTML information page...
if the properties are set later on, when the flex app is already running, I am facing the issue!
I tried several things but I can't get a usable message on flex side...
In my "doFilter" method, I did try this:
public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain)
          throws IOException, ServletException {
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     HttpServletRequest request = (HttpServletRequest) req;
     HttpServletResponse response = (HttpServletResponse) res;
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When doing so, I get an "Unsupported AMF version 2689" in Flashbug/Firebug under Firefox.
And I first tried a much more simple thing (in the "doFilter" method) such as :
throw new UnavailableException("Application closed");
or
res.sendError(HttpServletResponse.SC_TEMPORARY_REDIRECT);
return;
and I get this error :
faultCode:Client.Error.DeliveryInDoubt faultString:'Channel disconnected'
faultDetail:'Channel Disconnected before an acknowledement was received'
I really hope someone will be able to help us since it does not look like a crazy use case.
I have also tried to override the MessageBrokerServlet but I am facing the same issues...
Thank you very much for your help and keep on doing great job on BlazeDS!!!

[svn:bz-4.0.0_fixes] 23961: Bug#3200562: New Flex Session Id generated while disconnect with streaming amf channel

Revision: 23961
Revision: 23961
Author:   [email protected]
Date:     2012-06-15 04:42:44 -0700 (Fri, 15 Jun 2012)
Log Message:
Bug#3200562: New Flex Session Id generated while disconnect with streaming amf channel
While invalidating session, make sure a new one does not get created.
Modified Paths:
    blazeds/branches/4.0.0_fixes/modules/core/src/flex/messaging/endpoints/BaseStreamingHTTPE ndpoint.java
Property Changed:
    blazeds/branches/4.0.0_fixes/modules/

You're trying to do this directly in ActionScript without using Flex, correct?
The mxmlc compiler for Flex adds some registerClassAlias calls to map types between the client and the server. This will be missing if try to use the messaging code outside of a Flex app.
Take a look at the mx.utils.RpcClassAliasInitializer class in rpc.swc. This has a static registerClassAliases method that will do the class registration for you. You should just need to call this before running your messaging code.
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[svn:bz-4.6.x] 23962: Bug#3200562: New Flex Session Id generated while disconnect with streaming amf channel

Revision: 23962
Revision: 23962
Author:   [email protected]
Date:     2012-06-15 04:57:45 -0700 (Fri, 15 Jun 2012)
Log Message:
Bug#3200562: New Flex Session Id generated while disconnect with streaming amf channel
While invalidating session, make sure a new one does not get created.
Modified Paths:
    blazeds/branches/4.6.x/modules/core/src/flex/messaging/endpoints/BaseStreamingHTTPEndpoin t.java

I thought the same that those devices simply are too old. However I would like to know what causes this capabilities change. We want to get rid of the old H/W, but at the moment it looks as if we would need to revert back to the 4402 in order to get those things working again.
I have not enough information, but those devices are some kind of handhelds. Their MAC OUI belongs to Newport Electronics.
Regards,
Patrick

[svn:bz-trunk] 23960: Bug#3200562: New Flex Session Id generated while disconnect with streaming amf channel

Revision: 23960
Revision: 23960
Author:   [email protected]
Date:     2012-06-15 04:15:18 -0700 (Fri, 15 Jun 2012)
Log Message:
Bug#3200562: New Flex Session Id generated while disconnect with streaming amf channel
While invalidating session, make sure a new one does not get created.
Modified Paths:
    blazeds/trunk/modules/core/src/flex/messaging/endpoints/BaseStreamingHTTPEndpoint.java

[svn:bz-trunk] 23948: Bug##3200562: New Flex Session Id generated while disconnect with streaming amf channel

Revision: 23948
Revision: 23948
Author:   [email protected]
Date:     2012-06-13 06:11:35 -0700 (Wed, 13 Jun 2012)
Log Message:
Bug##3200562: New Flex Session Id generated while disconnect with streaming amf channel
On session time out, Flex Client is invalidated on the server side. It also results in Flex Session getting invalidated. In order to complete the client-server streaming connection handshake, the client ends up sending a CLOSE command. On the server side, for any work to be done, the MB first needs to creates a Flex Session (if none exists). After doing the necessary cleanup, the newly created Flex Session will also be invalidated. No stray Flex Sessions will left dangling...
Modified Paths:
    blazeds/trunk/modules/core/src/flex/messaging/endpoints/BaseStreamingHTTPEndpoint.java

Amf channels overrided in modules?

Hi All,
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Ram.

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My AMF channel seem to be a polling one

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