Concurrent HTTPService requests - is it possible?

I am a bit confused. I have several HTTPService objects that invoke different web services.
I cannot seem to fire more than one at a time. If I fire off an HTTPService, then fire off another one, it seems that the first request is destroyed.
I have the need to use a WebService I have written to handle the update of some data. I need to call this service six times (for each of the six calendar controls I have).
I have argued with my architect that I should have ONE service to handle all six loads of data, at once. But currently it is written to handle only ONE month, hence my need to fire off this web service 6 times.
Is this even possible? I use HTTPService objects...would I need to change the data access object to something like WebService object?
How can I call six webservices, at once, without running into concurrency problems? Any ideas, I am completely lost on this one...help!
By the way, my web services are written in .NET. I do not use ColdFusion or BlazeDS or anything else to layer my server. I speak directly to my web services via HTTPService objects. FYI.

^ Thank you so much. That was some great information and I will try to use the concurrency property on my HTTPService objects.
I have been able to find very little info on this subject and I see it as being rather important. I noticed in other FLEX apps I have demoed and looked at, that there are multiple service calls happening, concurrently, so this leads me to believe it can happen. I just dont know how to make it happen for my application. Thanks for the tip.
Also, I believe we are using WebService, not REST service. I noticed there are WebService objects in FLEX, where you can define multiple services in one object. I may need to switch to those type of objects instead of HTTPService. I am unsure.
I would much rather make my application web service calls more transactional. I would rather it pass the 6-month data in one call, rather than 6 one month calls. It just seems that 1 call would be more efficient than 6. 6 calls would also require a lot more logic and more work. I am curious to see if I can make it work though, I'll run a test and find out. Thank you.

Similar Messages

[svn] 949: Bug: BLZ-96 - When sending a HttpService request from ActionScript with multiple headers with the same name , it causes a ClassCastException in the server

Revision: 949
Author: [email protected]
Date: 2008-03-27 07:12:59 -0700 (Thu, 27 Mar 2008)
Log Message:
Bug: BLZ-96 - When sending a HttpService request from ActionScript with multiple headers with the same name, it causes a ClassCastException in the server
QA: Yes - try again with legacy-collection true and false.
Doc: No
Checkintests: Pass
Details: Another try in fixing this bug. When legacy-collection is false, Actionscript Array on the client becomes Java Array on the server and my fix yesterday assumed this case. However, when legacy-collection is true, Actionscript Array becomes Java ArrayList on the server. So added code to handle this case.
Ticket Links:
http://bugs.adobe.com/jira/browse/BLZ-96
Modified Paths:
blazeds/branches/3.0.x/modules/proxy/src/java/flex/messaging/services/http/proxy/RequestF ilter.java

Hi all!
Just to post the solution to this if anyone ever runs accross this thread...
For some reason i had it bad the first time, don't have time right now to see why but here is what worked for me:
HashMap primaryFile = new HashMap();
primaryFile.put("fileContent", bFile);
primaryFile.put("fileName", uploadedFile.getFilename());
operationBinding.getParamsMap().put("primaryFile", primaryFile);
HashMap customDocMetadata = new HashMap();
HashMap [] properties = new HashMap[1];
HashMap customMetadataPropertyRoom = new HashMap();
customMetadataPropertyRoom.put("name", "xRoom");
customMetadataPropertyRoom.put("value", "SOME ROOM");
properties[0] = customMetadataPropertyRoom;
customDocMetadata.put("property", properties);
operationBinding.getParamsMap().put("CustomDocMetaData", customDocMetadata);
Basically an unbounded wsdl type is an array of objects (HashMaps), makes sense, i thought i had it like this before, must have messed up somewhere...
Good luck all!

[svn] 931: Bug: BLZ-96 - When sending a HttpService request from ActionScript with multiple headers with the same name , it causes a ClassCastException in the server

Revision: 931
Author: [email protected]
Date: 2008-03-26 11:31:01 -0700 (Wed, 26 Mar 2008)
Log Message:
Bug: BLZ-96 - When sending a HttpService request from ActionScript with multiple headers with the same name, it causes a ClassCastException in the server
QA: Yes - we need automated tests for this basic case.
Doc: No
Checkintests: Pass
Details: RequestFilter was not handling multiple headers with the same name properly.
Ticket Links:
http://bugs.adobe.com/jira/browse/BLZ-96
Modified Paths:
blazeds/branches/3.0.x/modules/proxy/src/java/flex/messaging/services/http/proxy/RequestF ilter.java

Hi all!
Just to post the solution to this if anyone ever runs accross this thread...
For some reason i had it bad the first time, don't have time right now to see why but here is what worked for me:
HashMap primaryFile = new HashMap();
primaryFile.put("fileContent", bFile);
primaryFile.put("fileName", uploadedFile.getFilename());
operationBinding.getParamsMap().put("primaryFile", primaryFile);
HashMap customDocMetadata = new HashMap();
HashMap [] properties = new HashMap[1];
HashMap customMetadataPropertyRoom = new HashMap();
customMetadataPropertyRoom.put("name", "xRoom");
customMetadataPropertyRoom.put("value", "SOME ROOM");
properties[0] = customMetadataPropertyRoom;
customDocMetadata.put("property", properties);
operationBinding.getParamsMap().put("CustomDocMetaData", customDocMetadata);
Basically an unbounded wsdl type is an array of objects (HashMaps), makes sense, i thought i had it like this before, must have messed up somewhere...
Good luck all!

Timeout in resultHandler for HTTPService request

Hello All,
I have a flex application where I am calling to get data in XML format. The data file most likely will contain 10's of thousands of records (in most cases). What I am experiencing is a timeout in my rHandle function (see code snippets below):
Error #1502 A Script has executed for longer than the default timeout period of 15 seconds
My question/problem has 2 parts.
1) how do you disable the timeout?
2) the reading/parsing of the XML data seems to take waaaay too long. Is there a better way?
I put an Alert message at the top of the result handler function and it didnt trigger before the timeout message triggered. I am reading what could be 10's of thousands of records. Is there a better (and FASTER) way to do this than to read in XML format? Currently, no matter what I set the httpservice requests 'timeout' value to doesnt seem to have any effect. I get a timeout after 15 seconds every time. I have tried setting the timeout value to -1 (as documentation suggested) and/or to some very large value (say, 1200...20 minutes). Any and all help is appreciated.   Here is the code and an example of the XML file
private var contactService:HTTPService = new HTTPService();
private var xData:XML;
private var T_Data:ArrayCollection = new ArrayCollection();
private function get_data():void
   contactService.url="data/big_data.xml";
   contactService.format = "e4x";
   contactService.addEventListener(ResultEvent.RESULT, rHandle);
   contactService.requestTimeout = -1;
   contactService.send();
private function rHandle(event:ResultEvent):void
   var i:int;
   xData = event.result as XML;
   for (i=0; i < xData.el.length(); i++)
      var t:Object = new Object();
      t.cid = xData.el[i].cid;
      t.date = xData.el[i].date;
      t.y_axis = xData.el[i].y_axis;
      T_Data.addItem(t);
<mx:PlotChart.....DataProvider="{T_Data}"
   <mx:horizontalAxis>
      <mx:DateTimeAxis />
   </mx:horizontalAxis>
   <mx:verticalAxis>
      <mx:LinearAxis />
   </mx:verticalAxis>
   <mx:series>
      <mx:PlotSeries id=... yField="y_axis" xField="date" />
   </mx:series>
</mx:PlotChart.....
contents of big_data.xml
<xml.....>
<data>
<el><cid>1</cid><date>1243814400982</date><y_axis>10</y_axis></el>
<el><cid>2</cid><date>1243814401982</date><y_axis>12</y_axis></el>
<el><cid>3</cid><date>1243814451982</date><y_axis>44</y_axis></el>
<el><cid>4</cid><date>1243815451730</date><y_axis>21</y_axis></el>
.........(10s of thousands of records like this)....
</data>

Through trial and error, and some investigation, I found that the solution to my problem was to use remoteobject rather than httpservice.
Flex doesnt seem to handle httpservice calls with XX meg feeds very well.

Status of the httpservice request?

Im using httpservice to get XML from a live URL of a web service I run.... works great and Im just trying to make it a little more elegant and presentable... is there a way for me to have an animated busy indicator on the stage and have it sit on top (using depth control) of my list that populates with the XMl data... then based on the status of the httpservice request, toggle the depth so that when the xml has finished loading, the busy indicator drops beneath the list object (using a lower number for the depth).
or maybe its better to have the list alpha change and just leave the busy indicator below the list -- either way -- Im trying to figure out how to use some type of listener routine (presuming thats how I'd do it) to get the status and check for some type of completion.
heres the code Im using in FB 4.6 ... if its a mess, please be kind... Im just beginning to dabble with FB (and having a real blast so far).
<?xml version="1.0" encoding="utf-8"?>
<s:View xmlns:fx="http://ns.adobe.com/mxml/2009"
                    xmlns:s="library://ns.adobe.com/flex/spark"
                    creationComplete="init(event)" splashScreenImage="@Embed('logo.png')"
                    title="Events Listing Demo">
<fx:Script>
                    <![CDATA[
                              import mx.events.FlexEvent;
                        import spark.events.IndexChangeEvent;
                              protected function init(event:FlexEvent):void
                                        lfXML.send();
                              protected function list1_changeHandler(event:IndexChangeEvent):void
                                        navigator.pushView(Detail, event.target.selectedItem);
                              protected function btnreload_clickHandler(event:MouseEvent):void
                                        navigator.pushView(HomeView);
                    ]]>
</fx:Script>
<fx:Declarations>
<s:HTTPService id="lfXML" url="URL TO MY XML SERVICE HERE"/>
</fx:Declarations>
          <s:List id="list1" y="191" left="10" width="460" height="407" change="list1_changeHandler(event)"
                              contentBackgroundAlpha="90"
                              dataProvider="{lfXML.lastResult.Events.EventListing}" depth="6"
                              labelField="EventTitle">
</s:List>
          <s:BusyIndicator id="indicator1" y="280" width="180" height="165" depth="5" horizontalCenter="0" />
          <s:Button id="btnreload" x="109" label="Reload Events Data" click="btnreload_clickHandler(event)"
                                verticalCenter="301"/>
<s:Image x="10" y="2" width="460" height="173" source="@Embed('views/logo.jpg')"/>
</s:View>

After making a call, HTTPService fires a FaultEvent (if there was a failure) or ResultEvent (if there was a success).
Therefore, all you need to do is to display the busy indicator after any .send() and hide it again in response to any FaultEvent or ResultEvent.
EG: You could do this using states like this.
[code]
<fx:Script>
<![CDATA[
import mx.events.FlexEvent;
import mx.rpc.events.FaultEvent;
import mx.rpc.events.ResultEvent;
protected function init(event:FlexEvent):void
lfXML.send();
currentState = "loading";
protected function lfXML_faultHandler(event:FaultEvent):void
// TODO Auto-generated method stub
currentState = "ready";
protected function lfXML_resultHandler(event:ResultEvent):void
// TODO Auto-generated method stub
currentState = "ready";
]]>
</fx:Script>
<s:states>
<s:State name="ready" />
<s:State name="loading" />
</s:states>
<fx:Declarations>

<s:HTTPService id="lfXML"
fault="lfXML_faultHandler(event)"
result="lfXML_resultHandler(event)"
/>
</fx:Declarations>
<s:List id="list1" y="191" left="10" width="460" height="407" change="list1_changeHandler(event)"
contentBackgroundAlpha="90"
dataProvider="{lfXML.lastResult.Events.EventListing}" depth="6"
labelField="EventTitle">
</s:List>
<s:BusyIndicator id="indicator1" y="280" width="180" height="165" depth="5" horizontalCenter="0"
includeIn="loading"
/>
<s:Button id="btnreload" x="109" label="Reload Events Data" click="btnreload_clickHandler(event)"
verticalCenter="301"/>
<s:Image x="10" y="2" width="460" height="173" source="@Embed('views/logo.jpg')"/>
[/code]

HTTPService request for each View inside a ViewStack

Can someone point me in the right direction to have a
httpservice request for each view inside my viewstack?
<mx:ViewStack id="views">
<mx:Canvas id="view0">
</mx:Canvas>
<mx:Canvas id="view1">
</mx:Canvas>
</mx:ViewStack>
Can someone whip together a quick example or just point me in
the right direction?
Thanks

Ahh, don't do that.
Use a central HTTPService instance, and use AsyncToken to
keep track of which result goes where. Some code snippets below.
Tracy
Sample code using HTTPService, e4x, handler function to
populate a list item.
Also shows usage of AsyncToken.
The DataGrid tag:
<mx:DataGrid id="dg" dataProvider="{_xlcMyListData}"
.../>
The HTTPService tag:
<mx:HTTPService id="service" resultFormat="e4x"
result="onResult(event)" fault="..../>
Script block declaration:
import mx.rpc.Events.ResultEvent;
[Bindable]private var _xlcMyListData:XMLListCollection;
Invoke send:
var oRequest:Object = new Object();
oRequest.Arg1 = "value1";
var callToken:AsyncToken = service.send(oRequest);
token.callId = "myQuery1";
Result Handler function:
private function onResult(oEvent:ResultEvent):void {
var xmlResult:XML = XML(event.result); //converts result
Object to XML. can also use "as" operator
var xlMyListData:XMLList = xmlResult.myListData; //depends
on xml format, is row data
_xlcMyListData = new XMLListCollection(xlMyListData); //wrap
the XMLList in a collection
trace(_xlcMyListData.toXMLString()); //so you can see
exactly how to specify dataField or build labelFunction
var callToken:AsyncToken = oEvent.token;
var sCallId = callToken.callId; //"myQuery1"
switch(sCallId) {
case "myQuery1":
doQuery2();
break;
}//onResult

How to send concurrent xml request to Soap service.

Hi
I am working in a scenario. where i need to send more than 10 concurrent xml request to soap service hosted in IIS.
and that service directly pools to biztalk recieve location. Presently i am sending a single request through soap ui.
Is there any tool available to send more than 10 xml request to service. If not then how we send through C#.code

Hi Anagh,
Microsoft BizTalk LoadGen 2007 Tool would be the perfect fit for your requirement where you need to send "Concurrent" request to SOAP.
Using LoadGen you can configure it use to number of concurrent threads to send messages. In its config file, it has a section called
<NumThreadsPerSection> which can be used to set the number of concurrent threads that LoadGen will use to send messages.
Read one of my old blogposts where I have talked about using LoadGen for simulating message load for SOAP services.
http://indway-is.blogspot.co.uk/2009/01/loadgen-testharness-for-soap-transport.html
If this answers your question please mark it accordingly. If this post is helpful, please vote as helpful by clicking the upward arrow mark next to my reply.

Concurrent multiple requests hitting action classes

I have posted this issue in other forums, but i haven't got an answer that makes me satisfied.
Here is the scenario.
I have MVC architecture.
I have several action classes forwarded to one JSP page. Basically, one JSP page is shared by multiple action classes. The model built in the action class is displayed in the JSP page something like request.getAttribute(DATA_MODEL_VAR). "DATA_MODEL_VAR" is just string variable. The JSP page is very simple.
But I am just curious if there is any synchronization issue for JSP page. The JSP doesn't have isThreadSafe tag. I mean if there is any chance that the model built in A action class can be overriden by the model built in B action class if concurrent multiple requests are made to action class A and B. While I test some load testing, I found data (that doesn't even belong to a particular user) in JSP. That's why it makes me curious.
It would be great if someone can give me some info or resources.
Thank you.

I have posted this issue in other forums, but i haven't got an answer that makes me satisfied.
Here is the scenario.
I have MVC architecture.
I have several action classes forwarded to one JSP page. Basically, one JSP page is shared by multiple action classes. The model built in the action class is displayed in the JSP page something like request.getAttribute(DATA_MODEL_VAR). "DATA_MODEL_VAR" is just string variable. The JSP page is very simple.
But I am just curious if there is any synchronization issue for JSP page. The JSP doesn't have isThreadSafe tag. I mean if there is any chance that the model built in A action class can be overriden by the model built in B action class if concurrent multiple requests are made to action class A and B. While I test some load testing, I found data (that doesn't even belong to a particular user) in JSP. That's why it makes me curious.
It would be great if someone can give me some info or resources.
Thank you.

Multiple Httpservice requests

Hi,
I have a requirement where i have to load two components on
one click.
And each component has httpservice request.
function onclick is the following
public function onclick(event:MouseEvent):void{
this.loadComponentOne();
this.loadComponentTwo();
when i get the response correctly , the invoke and result
events from httpservice are in this order
Httpservice from component one in invoked
result from component one is [object Object]
HttpService from component two is invoked
result from component two is [object Object]
but sometimes there is a conflict between the responses from
the httpservices of these components
in this case,Events from httpservice output the result in
this order
Httpservice from component one in invoked
HttpService from component two is invoked
result from component one is [object Object]
result from component two is [] //empty for some reaon
i get the result from my servlet correctly but
ResultEvent.result is empty
and the component two is not loaded because the result is
empty..
so how should the multiple httprequests be handled to get the
responses correctly?
Thanks
chandana

I am using a separate class to create a httpservice.
following is the code where i send the Httpservice with all
the event handlers.
and from the component i call the methods from this class to
get the response as follows
public function selectedEntitiesList(id:String):void{
backendRequest = new MittoBackendRequest(list_url);
backendRequest.setRequest({action:action,id:id});
backendRequest.addEventListener(ResultEvent.RESULT,getList);
backendRequest.send();
Thanks
chandana

Dynamic HTTPService request AS3

I'm doing a mashup in Flex right now using Yahoo Maps. One of
the functions allows users to create their own routes.
Here's the problem. I need a dynamic httpService request
because I never know beforehand how many markers a route holds.
Here's my code:
[Bindable]
private var rssFeed:String;
private function opslaanRoute(event:Event):void
if(this.tekstInputVenster.text!="")
if(markerLijst.length>0)
rssFeed = "<route>";
rssFeed +=
"<routebeschrijving>"+this.tekstInputVenster.text+"</routebeschrijving>";
var lengte:Number = markerLijst.length;
for(var d:Number=0;d<lengte;d++)
rssFeed +="<marker>";
rssFeed +=
"<latlon"+d+">"+markerLijst[d][0]+"</latlon"+d+">";
rssFeed +=
"<indexMarker"+d+">"+markerLijst[d][1]+"</indexMarker"+d+">";
rssFeed +=
"<titel"+d+">"+markerLijst[d][2]+"</titel"+d+">";
rssFeed +=
"<beschrijving"+d+">"+markerLijst[d][3]+"</beschrijving"+d+">";
rssFeed +="</marker>";
rssFeed += "<aantal>"+indexMarkers+"</aantal>";
rssFeed += "<userid>"+_loginid+"</userid>";
rssFeed += "</route>";
opslaanR.send();
else
Alert.show("U moet markers toevoegen om op te slaan!");
else
Alert.show("U moet een routebeschrijving toevoegen om op te
slaan!");
The httpservice looks like this:
<mx:HTTPService
id="opslaanR"
url="url"
useProxy="false"
method="POST"
resultFormat="e4x"
result="opslaanSucces(event)"
showBusyCursor="true"
>
<mx:request>
{rssFeed}
</mx:request>
</mx:HTTPService>
The "aantal" tag is the number of markers a route holds.
Basically I want to loop the $_POST variables in php using "aantal"
so I can add them to my database. The PHP works flawlessly but it
never gets the httpservice values.
Please help.

well you understood me, I want an alternative to the script what I put in AS2,
but I think. of the script as you sent me centenary assume that I have in the library button menu0 menu1 .....
But I have only one menu button.
because I tried it and it did not work.
var ClassRef: Class = Class (getDefinitionByName ("menu" + i));
I will be happy if later you look again

First HTTPService request takes forever

Ok. I have an interesting event taking place with my application.
The first HTTPService request takes about 10-20 seconds and then, any additional requests are made between 1-5 seconds.
A user types in a country code that and clicks a submit button. The request is sent to a PHP page with the variable, the PHP creates an XML response. Flex updates a datagrid accordingly which shows rates/minute for phone numbers with that country code.
Any suggestions as to why this might be?
Thanks in advance.
Other Thoughts:
First Request = 7 results (about 15 seconds)
Second Request = 168 results (1 second)
Third Request = 3028 results (5 seconds)
Fourth Request = same request as First request (less than 1 second).

im not sure about that one. i havent seen that issue before. as for the 'if i delete itunes, will it delete my music' question, the answer is no. if you uninstall itunes, it will just leave your music on your computer.

Multipe Flex Apps Multiple HttpService request fails

I have multiple flex apps on the same page. Both make calls to different httpservices on creation complete. 90% of the time one will fails with the useless generic 2032 error.
The one request that fails never makes it to the webserver accroding to the logs. In firebug is says the connection was closed - maybe the browser is closing it? I have verified that the service url is not cached. Is this is a known limitation with how flex is making httpservice request behind the scenes that it cant handle multiple apps on the same page??
Anybody have this issue and know of a workaround?

I have multiple flex apps on the same page. Both make calls to different httpservices on creation complete. 90% of the time one will fails with the useless generic 2032 error.
The one request that fails never makes it to the webserver accroding to the logs. In firebug is says the connection was closed - maybe the browser is closing it? I have verified that the service url is not cached. Is this is a known limitation with how flex is making httpservice request behind the scenes that it cant handle multiple apps on the same page??
Anybody have this issue and know of a workaround?

How to get concurrent pgm request id in data template

Hi,
I need concurrent pgm request id in datatemplate as one of the param.Some thing like :P_CONC_REQUEST_ID in reports.How can i read requestid in data template.
Please help
Regards,
ashok

put this as first line in RTF
<?param@begin:P_CONC_REQUEST_ID?>
Then you can use it inside like
<?$P_CONC_REQUEST_ID?> to display.
Any parameter for that matter, just add them as first line, and use it.

Tree Doesnt populate the whole data with HTTPService request

Hi,
I am working with the tree control which populates the tree
with the HTTPService request.
Step1. Make a HTTPService Request and fetch the top level
entries.
Step2. When ever the user opens an treeItem by clicking on
the Triangular icon besides the tree item
Make a HTTPService, fetch the data, on the callback method
append the Datasource with the new data for the item to open.
problem is the tree branch gets populated with partial data
instead of the full data where as the DataSource has the full data.
Step3. when ever the user clicks on the item
Make a HTTPService, fetch the data, on the callback method
append the Datasource with the new data for the item to open.
Now the tree item gets populated with the correct data.
tried every thing to refresh the tree....

private function refreshTree():void{
tree.expandItem(rootNode, false);
tree.expandItem(rootNode, true);
this helped

Concurrent Managers & request monitoring and tunning

Hi,
Kindly share with me some scripts if you have for Concurrent Managers & request monitoring and tunning.
Many thanks before.

Check the following Metalink Notes:
Note: 169935.1 - Troubleshooting Oracle Apps Performance Issues
https://metalink.oracle.com/metalink/plsql/ml2_documents.showDocument?p_database_id=NOT&p_id=169935.1
Note: 108185.1 - Oracle Applications Object Library SQL scripts
https://metalink.oracle.com/metalink/plsql/ml2_documents.showDocument?p_database_id=NOT&p_id=108185.1
Note: 104664.1 - Setup & Usage (Concurrent Manager Unix specific)
https://metalink.oracle.com/metalink/plsql/ml2_documents.showDocument?p_database_id=NOT&p_id=104664.1
Note: 187504.1 - bde_request.sql - Process and Session info for one Concurrent Request (11.5)
https://metalink.oracle.com/metalink/plsql/ml2_documents.showDocument?p_database_id=NOT&p_id=187504.1
You may also use Oracle Application Manager (OAM) to monitor the concurrent managers and requests.

Concurrent HTTPService requests - is it possible?

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