Streaming in Flex
Hello Everybody
I am working on a project in which I have to get data from
database and to show in a datagrid. For the first time I got the
data and was showing in the datagrid. I want to update the datagrid
when there was any update in the database. How should I deal with
this problem?
Any suggestions will be appreciated.
Thanks
"RUSH-ME" <[email protected]> wrote in
message
news:goninu$5da$[email protected]..
> Hello Everybody
>
> I am working on a project in which I have to get data
from database and
> to
> show in a datagrid. For the first time I got the data
and was showing in
> the
> datagrid. I want to update the datagrid when there was
any update in the
> database. How should I deal with this problem?
Use something like BlazeDS.
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Solved!
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Anthony_VZ
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I am trying to display a live stream from rtmp server. Below is my code.
<?xml version="1.0" encoding="utf-8"?>
<s:Group height="100%" width="100%"
xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
xmlns:mx="library://ns.adobe.com/flex/mx">
<fx:Script>
<![CDATA[
import mx.core.FlexGlobals;
private const URL:String = "rtmp://eigr2.flashlive.bigCDN.com/20175D";//"http://www.helpexamples.com/flash/video/cuepoints.flv";
private const STREAM_KEY:String = "eigr8";
private var _video:Video = new Video();
private var _nc:NetConnection;
private var _custClient:Object;
private var _ns:NetStream;
private var _streamKey:String;
public function playVideo():void
var url:String = URL;
if(videoHandler.numChildren == 0)
_nc = new NetConnection();
_nc.addEventListener(NetStatusEvent.NET_STATUS, netStatusHandler);
_nc.addEventListener(AsyncErrorEvent.ASYNC_ERROR, asyncErrorHandler);
_nc.connect(URL);
private function netStatusHandler(event:NetStatusEvent):void
trace("NC " + event.info.code);
switch (event.info.code)
case "NetConnection.Connect.Success":
_video = new Video();
_video.smoothing = true;
var custClient:Object = new Object();
custClient.onMetaData = metaDataHandler;
_ns = new NetStream(_nc);
_ns.client = custClient;
_ns.addEventListener(AsyncErrorEvent.ASYNC_ERROR, asyncErrorHandler);
_ns.addEventListener(DRMErrorEvent.DRM_ERROR, drmerror);
_ns.addEventListener(DRMStatusEvent.DRM_STATUS, drmStatus);
_ns.addEventListener(StatusEvent.STATUS, status);
_ns.addEventListener(NetStatusEvent.NET_STATUS, target);
_ns.bufferTime = 2;
_ns.receiveVideo(true);
var net:NetStreamPlayOptions = new NetStreamPlayOptions();
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//net.transition = NetStreamPlayTransitions.APPEND;
net.streamName = STREAM_KEY;
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_video.attachNetStream(_ns);
videoHandler.addChild(_video);
videoHandler.visible = true;
//background.visible = true;
break;
case "NetConnection.Connect.Failed": //shownoVideoText();
break;
case "NetStream.Play.StreamNotFound": trace("Unable to locate video: ");
break;
private function status(event:StatusEvent):void
trace("Status Event : " + event.toString());
private function drmerror(event:DRMErrorEvent):void
trace("DRM Error : " + event.toString());
private function drmStatus(event:DRMStatusEvent):void
trace("DRM Status : " + event.toString());
private function videoStates(event:Event):void
trace(event.toString());
public function stopVideo():void
_nc.close();
_nc = null;
_ns = null;
this.videoHandler.removeChild(_video);
private function asyncErrorHandler(event:AsyncErrorEvent):void
trace("Async errrorrrrrrrrrrrrrrrrrrrr");
private function target(e:NetStatusEvent):void
trace("Started playing : " + e.info.code);
private function metaDataHandler(infoObject:Object):void
this.setVideoSize(infoObject.height, infoObject.width);
/*public function playVideo():void
custClient = new Object();
custClient.onMetaData = metaDataHandler;
nc = new NetConnection();
nc.connect(null);
nc.client = { onBWDone: function():void{} };
//nc.addEventListener(NetStatusEvent.NET_STATUS, target);
nc.addEventListener(AsyncErrorEvent.ASYNC_ERROR, asyncErrorHandler);
ns = new DynamicCustomNetStream(nc);
ns.client = custClient;
ns.addEventListener(AsyncErrorEvent.ASYNC_ERROR, asyncErrorHandler);
ns.addEventListener(NetStatusEvent.NET_STATUS, target);
ns.play(URL);
videoPlayer.attachNetStream(ns);
videoPlayer.smoothing = true;
if(!videoHandler.contains(videoPlayer))
videoHandler.addChild(videoPlayer);
private function metaDataHandler(infoObject:Object):void
this.setVideoSize(infoObject.height, infoObject.width);
override public function set currentState(value:String):void
super.currentState = value;
this.videoHandler.percentHeight = value == "fullScreen" ? 100 : 50;
public function onFCSubscribe(info:Object):void
trace("onFCSubscribe - succesful");
protected function goBack():void
FlexGlobals.topLevelApplication.showVideo(false);
]]>
</fx:Script>
<fx:Declarations>
<!-- Place non-visual elements (e.g., services, value objects) here -->
</fx:Declarations>
<s:Button click="goBack()"
horizontalCenter="0"
label="Go Back" bottom="50"/>
<mx:UIComponent width="100%"
height="50%"
top="0" left="0"
id="videoHandler"/>
</s:Group>
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Is it possible to make a remote call to a remote Java object that uses BlazeDS so that the data is gotten as a stream (InputStream)? For example when uploading a file, it would require less memory.
The BlazeDS examples about file upload that I've seen read the data from file to client memory first with FileReference#load() and after that pass it to the server as ByteArray. By doing so, both client and server need to load the whole file data into memory before it can be passed/processed.
Thanks.Thanks for the tip Joe.
It's not quite what I was looking for, but it gave me some ideas.
The blog post describes how to create your own server to handle the file stream. With BlazeDS & Java EE app server there's no need to implement the low level stuff.
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