Zend_AMF, RemoteObject problem

Hi there,
I have strange problem with FLEX 3. I'm using RemoteObject to call PHP script (Zend_AMF) and return array in AMF format. Technically everything works properly but it is slow. 18 000 records take 2 minutes. After few days of "try and fault" I changed code and instead of RemoteObject I used NetConnection to data from PHP. I received same result set with in 15 secs. I have tested few times jsuts changing 1 line of code in FLEX. With RemoteObject it is 10 times slower then with NetConnection.
As far as I know RemoteObject is preffered approach (newer) and NetConnection is for back compatibility reason only. Can someone explain that? Is teher any additional setup required for RemoteObject I am not aware of?
I am running Appache 2.2 as module on Vista and have Zand Framework 1.9.2 and PHP 5.3.0
Thank you

Richard Bates of flexandair.com figured it out. In my php.ini file, I had the memory limit set at 8M. After, changing it to 32M, it worked. Thank you, Richard!
-Laxmidi

Similar Messages

Air + Ipad + RemoteObject problem with session cookies

I am making Air version for IPad of a Flex application.
My flex application needs session from an secured enterprise proxy, without that session none remoteObject requests can pass the proxy and reach blazeDS.
My solution for flex works fine: calling an enterprise servlet at application´s startup to obtain a cookie session. I use a POST call to the servlet using URLRequest (sending the user and password parameters), the servlet responds with a message with a session cookie, and from that point, without me having to code anything more, my flex application get that cookie with the session that automatically is loaded in my browser cookie stack, and that transparently is used from all my subsequents remoteObjects calls in the flex application.
In my Adobe Air Ipad version, this just does not work, the session or is not storaged or is not attached with subsequent remoteObjects requests.
- I´m forcing request.manageCookies = true
- I´m working with the IOS simulator (Is there any difference for cookies with a real Ipad device?)
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.. What´s the problem/difference with Air+Ipad from the flex version?

Hi BalusC ,
Thanks for your detailed response. I have a question about this comment you noted..
"Terrible. Just keep the bean request scoped. "
I changed the bean to request and now have this issue.
            <rich:dataGrid id="membersInZipcode" value="#{membersInZipcode.arrayListOfSearch4Member}"
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        </h:form> I am using a request bean to hold the search parms that loads the bean. This works great.
The problem is when I use the rich:datascroller for the next page.
It goes back to the bean and the request scope bean is empty. This holds the search values.
How do I put this back into the request after each process??
Question 2..
"Those settings only applies on the current request, i.e. the JSP file itself. Images are obtained by separate and independent requests. You need to set the headers on those requests as well. You can use a filter for this."
I have never set a filter ...how do I do it? Do you have a link for an example of this filter setup?
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Problem in mapping remoteobject on server side

Hello all
I am trying to use remoteobjects in Flex and PHP via Zend_AMF. I am having problem in mapping the data object in flex with the one in PHP.
Here's my code....
private function getAuthors(event:Event):void
     serviceRO = new RemoteObject();
     serviceRO.endpoint = "http://localhost/sampleproj/public/";
     serviceRO.destination = "zend";
     serviceRO.source = "MyService";
     serviceRO.addEventListener(FaultEvent.FAULT, faultListener);
     serviceRO.getData.addEventListener(ResultEvent.RESULT, resultListener);
Now, here's the server side directory structure that works for me....
webroot
+ sampleproj
++ public
+++ index.php (index file for the webapp)
+++ MyService.php (this is the service class)
+++ VOAuthor.php (this is the Value Object class)
Since the index file, and the service file and value object are all in same directory, it works.
This is what DOESN'T work....
webroot
+ sampleproj
++ services
+++ MyService.php (this is the service class)
++ vos
+++ VOAuthor.php (this is the Value Object class)
++ public
+++ index.php (index file for the webapp)
The error that I get is:
Channel.Connect.Failed error
Here's little of something that's going on in index.php
<?php
require_once ('C:/webtools/zendframework/zf/library/Zend/Amf/Server.php');
require_once ( realpath(dirname(__FILE__) . '/../services/MyService.php') );
$server = new Zend_Amf_Server();
$server->setClass("MyService"); // adding the class to AMF server
$server->setClassMap("VOAuthor", "VOAuthor"); // mapping the ActionScript VO to PHP VO
echo($server->handle());
?>
My guess is that in ActionScript code I have to do something with RemoteObject's endpoint.
Can anybody please help me out with this?
Thanks and Regards
ShiVik

The problem turned out to be in the php code.
Here's how I changed it
<?php
require_once ('C:/webtools/zendframework/zf/library/Zend/Amf/Server.php');
$server = new Zend_Amf_Server();
// the following methods provide the lazy loading of services and value objects
$server->addDirectory( realpath(dirname(__FILE__) . "/../services/") );
$server->addDirectory( realpath(dirname(__FILE__) . "/../vos/") );
echo($server->handle());
?>
Earlier I wasn't taking into account the change of directories for service and value object files.
Thanks and Regards
ShiVik

Timming Problem with RemoteObject

Hi,
I am Sagar S. De, I have faced a problem with Flex
DataService described below…
I am using flex RemoteObject to get data from Database and
then I am trying to set the data in ArrayCollection. But the data
is not assigned to ArrayCollection. When I am debugging I have
found that the ArrayCollection is assigned before data came from
Database. How do I solve the problem?
Here is a code snippet where I have faced the problem exactly
(In alert box Result2 comes before Result1).
package visualsqlbuilder.logic {
import mx.collections.ArrayCollection;
import mx.controls.Alert;
import mx.rpc.events.FaultEvent;
import mx.rpc.events.ResultEvent;
import mx.rpc.remoting.mxml.RemoteObject;
public class Table {
public var tableNames : ArrayCollection = new
ArrayCollection();
/* RETURNS ALL TABLE NAMES FORM THE DATABASE OF THE
SPECIFIED SCHEMA */
public function getTables(connectionTypetring,
schemaNametring) : ArrayCollection {
var remoteGetTables : RemoteObject = new RemoteObject();
remoteGetTables.destination = "DBDetails";
remoteGetTables.addEventListener(ResultEvent.RESULT,
resultGetTables);
remoteGetTables.addEventListener(FaultEvent.FAULT,
faultGetTables);
remoteGetTables.showBusyCursor = true;
remoteGetTables.getDBTables(connectionType, schemaName);
//Executes Before data came from Database and show tableNames
as blank ie. null
Alert.show("Result 2: " + tableNames.toString());
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var result : ArrayCollection = event.result as
ArrayCollection;
tableNames.removeAll();
for(var i : int = 0; i<result.length; i++) {
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tableNames.addItem;
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show tableNames correctly
Alert.show("Result 1: " + tableNames.toString());
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mx.controls.Alert.show(event.fault.toString());

You need to realize that Flex does most of the asynchronous,
that means that the function
remoteGetTables.getDBTables(connectionType, schemaName); will
returns immediately.
So if you want to place an Alert somewhere, do it in your
response function where you currently show your Result 1.
It's currently hard to understand what you really want to do
with your dataset. But further processing of real data needs to be
done in the function resultGetTables or other functions executed
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Ries

Problems with RemoteObject and security sandbox errors

I'm having trouble with an AS3 AMF RemoteObject request that is hosted on Google App Engine. I have a crossdomain.xml file in the root of the domain, and also one at the remoting endpoint.
Here are the contents of the root crossdomain.xml:
<?xml version="1.0"?>
<cross-domain-policy>
<site-control permitted-cross-domain-policies ="all"/>
<allow-access-from domain="*.appspot.com"/>
<allow-access-from domain="*.{appid}.appspot.com"/>
<allow-access-from domain="*.{appid}.com"/>
<allow-access-from domain="*.{appid}.org"/>
</cross-domain-policy>
I have replaced my application's ID with {appid}. In the endpoint crossdomain.xml, it says the exact same thing, except it omits the <site-control> tag.
Loading the swf file and testing it on my machine works just fine... I think that may have something to do with me having the debugger version of Flash Player. When I push it up to App Engine to make it public, other clients access it and get a Client.Error.MessageSend Channel.Security.Error error Error #2048 url: http://05-alpha.latest.{appid}.appspot.com/_rpc/data.
I am using Flex 4 beta, and the App Engine Python runtime. I have tried full wildcard in the crossdomain, and even accessing the data endpoint at a relative URL so as to avoid this error.
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The error happens regardless of where I access it (the beta URL, the production URL, etc).
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Even on my development machines (where it seems to work), there's nothing running on the host/port combo it's trying to access.
Extended AS3:
FatCatStage.mxml:
<s:RemoteObject id="dataService" showBusyCursor="false" destination="data" endpoint="/_rpc/data" />
main.mxml:
<fx:Script>
<![CDATA[
fatCatStage.dataService.RetrieveFirstGraph.addEventListener( ResultEvent.RESULT, fatCatStage.graphInitialize );
fatCatStage.dataService.RetrieveFirstGraph();
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if(event.result.result!='failure')
var GraphData:Object = event.result.response;
this.lastGraphData = GraphData;
fatCatViz.removeAll()
var root:GenericSprite = fatCatViz.addNodeElement(GraphData.object,null,this.center,GraphData.object.key);
for each ( var Connection:Object in GraphData.object.connections )
this._recursiveGraph(root, Connection, center, 3);
else
Alert.show('There was an internal graphing error. Please try again.');
fatCatViz.updateInternalStructure();
this.intervalSet = setInterval(timedReLayout,500);
]]>
</fx:Script>
That's all of the relevant actionscript for the entire application. Where is it referencing localhost?

Problems with RemoteObject?

I've got an application that uses RemoteObjects, built for web. I'm porting it to AIR now, but the RemoteObject code which works just fine built for web is failing when built for AIR.
When I invoke a method on a RemoteObject, I get a fault with the following error condition:
faultDetail "Channel.Connect.Failed error Invalid URL url: 'null'"
What's strange is that I have verified that the URL going into the Channel. And as I said, this code works perfectly when built for web.
Using Flex 4 with the latest AIR SDK.
I've tried setting the endpoint directly, which gives the same result. Also please note I'm not using MXML to create my RO's, I'm doing it all in AS3 using ChannelSets and all that.
Any ideas what's wrong?
Thanks!
Craig

The error happens regardless of where I access it (the beta URL, the production URL, etc).
That's literally all the actionscript code for the remote object... I've included an extended snippet below, but I have no idea why the SWF would be trying to access localhost.
Even on my development machines (where it seems to work), there's nothing running on the host/port combo it's trying to access.
Extended AS3:
FatCatStage.mxml:
<s:RemoteObject id="dataService" showBusyCursor="false" destination="data" endpoint="/_rpc/data" />
main.mxml:
<fx:Script>
<![CDATA[
fatCatStage.dataService.RetrieveFirstGraph.addEventListener( ResultEvent.RESULT, fatCatStage.graphInitialize );
fatCatStage.dataService.RetrieveFirstGraph();
public function doGraphChange(event:ResultEvent):void
if(event.result.result!='failure')
var GraphData:Object = event.result.response;
this.lastGraphData = GraphData;
fatCatViz.removeAll()
var root:GenericSprite = fatCatViz.addNodeElement(GraphData.object,null,this.center,GraphData.object.key);
for each ( var Connection:Object in GraphData.object.connections )
this._recursiveGraph(root, Connection, center, 3);
else
Alert.show('There was an internal graphing error. Please try again.');
fatCatViz.updateInternalStructure();
this.intervalSet = setInterval(timedReLayout,500);
]]>
</fx:Script>
That's all of the relevant actionscript for the entire application. Where is it referencing localhost?

Problem with SQL Insert

Hi
I am using Flex to insert data through remoteobject and using
SAVE method generated from CFC Wizard.
My VO contains the following variables where id has a default
value of 0 :
public var id:Number = 0 ;
public var date:String = "";
public var accountno:String = "";
public var debit:Number = 0;
public var credit:Number = 0;
id is set as the primary key in my database.
I have previously used MySQL which automatically generates a
new id if I either omitted the id value in my insert statement or
use 0 as the default value.
However, now I am using MS SQL Server and the insert
generated this error:
Unable to invoke CFC - Error Executing Database Query.
Detail:
[Macromedia][SQLServer JDBC Driver][SQLServer]Cannot insert
explicit value for identity column in table 'Transactions' when
IDENTITY_INSERT is set to OFF.
Strange thing is that I dont see this problem with another
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This is SQL used to create the table:
USE [Transactions]
SET ANSI_NULLS ON
SET QUOTED_IDENTIFIER ON
SET ANSI_PADDING ON
CREATE TABLE [dbo].[Transactions](
[id] [int] IDENTITY(1,1) NOT NULL,
[date] [datetime] NULL,
[accountno] [varchar](100) NULL,
[debit] [int] NULL,
[credit] [int] NULL,
CONSTRAINT [PK_Transactions] PRIMARY KEY CLUSTERED
[id] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE =
OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON,
ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]
Has anyone encountered this problem before with insert
statements dealing with a unique id (with MS SQL Server)?

Change "addRecords =
connection.prepareStatement("
to "addRecords =
connection.preparedStatement("
-BIGD

Problem with RMI in ADB T75 receiver

Hi:
I have a problem with an xlet that uses the RMI (IXC) API in the ADB T75 development settop box.
I export an object (of type MyObject) implementing the Remote interface, and, later, I import it with no problem.
The problem appears after importing the object, when I try to cast the imported object to the type of the exported object (type MyObject) for using it (example on page 371 of the marvelous Morris book).
If I import the object in the same xlet where I export it (a little bit useless), the process works fine as the class of the imported object (remoteObject.getClass().getName()) is the same of the exported object.
But, when importing the object from another xlet, doing the cast fails (ClassCastException). This time, remoteObject.getClass().getName() returns the name "stub_MyObject_ca_ba" ( "ca" is the OrgID and "ba" is the AppID of the exporting xlet). That is, the middleware is returning to the importing xlet an object of the stub class.
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May be a bug of the ADB T75 settop box?
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Liga0068

Problem solved. This was posted by Pretorius_594 on Feb 27, 2004.
Sorry for bothering.
The problem was due to that I was doing a cast to the original object (MyObject). That is:
remoteObject = lookup(...)
MyObject importedobject = (MyObject)remoteObject.
I saw such an example in the Morris and Smith-Chaigneau book, but, definetively, that code seems not to work (at least in the ADB receiver)
Th right solution is to extend the Remote interface (MyRemote) and to cast the importedobject to that type. That is:
public interface MyRemote extends Remote ...
remoteObject = lookup(...)
MyRemote importedobject = (MyRemote)remoteObject.
Liga0068

I have a production mobile Flex app that uses RemoteObject calls for all data access, and it's working well, except for a new remote call I just added that only fails when running with a release build. The same call works fine when running on the device

I have a production mobile Flex app that uses RemoteObject calls for all data access, and it's working well, except for a new remote call I just added that only fails when running with a release build. The same call works fine when running on the device (iPhone) using debug build. When running with a release build, the result handler is never called (nor is the fault handler called). Viewing the BlazeDS logs in debug mode, the call is received and send back with data. I've narrowed it down to what seems to be a data size issue.
I have targeted one specific data call that returns in the String value a string length of 44kb, which fails in the release build (result or fault handler never called), but the result handler is called as expected in debug build. When I do not populate the String value (in server side Java code) on the object (just set it empty string), the result handler is then called, and the object is returned (release build).
The custom object being returned in the call is a very a simple object, with getters/setters for simple types boolean, int, String, and one org.23c.dom.Document type. This same object type is used on other other RemoteObject calls (different data) and works fine (release and debug builds). I originally was returning as a Document, but, just to make sure this wasn't the problem, changed the value to be returned to a String, just to rule out XML/Dom issues in serialization.
I don't understand 1) why the release build vs. debug build behavior is different for a RemoteObject call, 2) why the calls work in debug build when sending over a somewhat large (but, not unreasonable) amount of data in a String object, but not in release build.
I have't tried to find out exactly where the failure point in size is, but, not sure that's even relevant, since 44kb isn't an unreasonable size to expect.
By turning on the Debug mode in BlazeDS, I can see the object and it's attributes being serialized and everything looks good there. The calls are received and processed appropriately in BlazeDS for both debug and release build testing.
Anyone have an idea on other things to try to debug/resolve this?
Platform testing is BlazeDS 4, Flashbuilder 4.7, Websphere 8 server, iPhone (iOS 7.1.2). Tried using multiple Flex SDK's 4.12 to the latest 4.13, with no change in behavior.
Thanks!

After a week's worth of debugging, I found the issue.
The Java type returned from the call was defined as ArrayList. Changing it to List resolved the problem.
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How to stop a running remoteobject in flex?

Hi,
I'm using Flex+Blazeds+Java to do my project, but now I met a big problem: when I query the database, I use remoteobject to call the Java method to do this. But usually the query takes a long time, so during the waiting time , I hope I can cancel the query operation, or when I begin the next query, it can cancel the last query operation automatically. Is there any way to do this? If yes, How?
Thanks a lot!

Did you ever solve this problem ? If so please share the solution.

Creation of RemoteObject

Hi,
I have a serious problem with the instanciation of my RemoteObject.
The strange thing is that this instanciation work fine until i regenerate my stub and skeleton. Moreover, i have no way to print trace or debug my application. So, I would like to know all the errors that the instanciation of a RemoteObject can generate or any pointer.
my failing code is similar to:
MyRemoteObject mmyRemote = new MyRemoteObject() ;
Thanks for your help.
Best regards guiguch.

When you create an instance of an object, but dont bind it, then you can never hope to see it remotely, since its not in the registry. Strictly speaking, if you do bind it, then you are really getting an instance of the stub, which makes the call for you to the skeleton. By and by a reference to what you bound will be finally obtained. The exact details of an RMI call can be explained, and it had to do with getting references to the stubs themselves for sure.

Using mx:RemoteObject

Hi There,
I was trying "Daniel Harfleet's" sample example , where he
is showing how to integrate Java and Flex using a simple RPC
example. I followed the steps, but I am getting an error on the
Server console.
My Flex application is deployed on JBoss server 4.0.5.
I've made sure that the java class is compiled and is in
placed in the WEB-INF/classes directory of my Flex application.
This is how the remoteobject tag looks in my sample.mxml
file
<mx:RemoteObject
id="echoRO"
destination="echoService"
fault="handleFault(event)"
result="handleResult(event)" />
============
This is how the entry in the remote-config.xml looks
<default-channels>
<channel ref="my-amf"/>
</default-channels>
<destination id="echoService">
<properties>
<source>fdsweb.EchoService</source>
<scope>application</scope>
</properties>
</destination>
==========
So, when I try to access the application deployed in the JBoss,
it throws the following error on the console.
22:59:59,484 INFO [STDOUT] [Flex] [ERROR] Exception when
invoking service: remo
ting-service
with message: Flex Message
(flex.messaging.messages.RemotingMessage)
operation = echo
clientId = 4A82830C-BC09-C972-DEFB-361367B86F0E
destination = echoService
messageId = C4DFD400-5B97-AB88-DFD7-80D2BD155FFC
timestamp = 1170392399484
timeToLive = 1170392399484
body = null
hdr(DSEndpoint) = my-amf
exception: flex.messaging.MessageException: No destination
'echoService' exist
s in service flex.messaging.services.RemotingService
22:59:59,500 INFO [STDOUT] [Flex] [ERROR] Error handling
message: flex.messagin
g.MessageException: No destination 'echoService' exists in
service flex.messagin
g.services.RemotingService
incomingMessage: Flex Message
(flex.messaging.messages.RemotingMessage)
operation = echo
clientId = 4A82830C-BC09-C972-DEFB-361367B86F0E
destination = echoService
messageId = C4DFD400-5B97-AB88-DFD7-80D2BD155FFC
timestamp = 1170392399484
timeToLive = 1170392399484
body = null
hdr(DSEndpoint) = my-amf
errorReply: Flex Message
(flex.messaging.messages.ErrorMessage)
clientId = null
correlationId = C4DFD400-5B97-AB88-DFD7-80D2BD155FFC
destination = echoService
messageId = 4A828333-CC08-81C5-E391-08512AA44718
timestamp = 1170392399500
timeToLive = 0
body = null
code = Server.Processing
message = No destination 'echoService' exists in service
flex.messaging.ser
vices.RemotingService
details = null
rootCause = null
body = null
extendedData = null
Could someone , please let me know as to what I am missing.
-Regards

As it seems, your destination is configured so it's likely to
be a configuration problem.
1) Are you sure your JBoss has been properly configured? This
document shows how:
http://www.adobe.com/support/documentation/en/flex/2/install.html#jboss
2) An FDS application is composed by several XML files, JAR
files and so son... To ensure your application will have all
packages needed, it's recommended to start it from samples.war
provided in FDS instalation. Are you doing it? I mean, don't start
your application from scratch, append your destination
configuration to an existing remoting-config and ad your classes to
the classes directory
3) If it doesn't work let me know

Problem in Blazeds with Jboss Clustering ( Mod_JK with SSL )

Hi,
     We are running our flex application in jboss clustering environment with the help of Apache mod_jk(Apache Web server as front end with mod_ssl enabled). We are using the SecureAMFChannel as we deploy the application in SSL. We use the RemoteObject for communicating with Java.
The Application is running fine when we have only one node of JBoss. But once we add one more node to the cluster the application throws the following exception .
Duplicate HTTP-based FlexSession error: A request for FlexClient 'FDCA49A7-9317-4D8A-881F-9248B1136E7A' arrived over a new FlexSession 'C9C563B8266A03C2207C00796CD7DFF1', but FlexClient is already associated with FlexSession '8A328320F5C530D55E94568996A1B552', therefore it cannot be associated with the new session.
As I am maintaing the session in the server, I need to use the JBoss cluster for session replication. I heard that flex clustering is not needed as we have mod_jk and it will do all the stuff for us.
I checked with simple application without any session data also then too I faced the same problem.
After the very first login, I can see 2 session created simultaneously and destroyed. I checked the application whether it calls twice before the session is created, but it is calling only once.
Also when application connects with server2 and if I down the server2 my flex application throws the error that the server is not found, It is not detecting the other server.But it works once I refresh the browser.
Application Environment Details
JBoss 6
Blaze Ds 4.5
Apache Web server 2.2.21
Mod_JK   1.2.32
Mod_SSL 2.8.31
Thanks,
Suresh T
I enabled the sticky session in Mod_jk .
It is working when the connection is not secure(http) in both apache web server and jboss web server ). But when the connection is https the above problem is happening .
Message was edited by: suresh.thirumurugan

Hi,
Thanks for your info.
It worked for me as well.
Thanks,
Prasad
On 6/26/08,
Matthieu Labour <
[email protected]> wrote:
A new message was posted by Matthieu Labour in
Configuration and Getting Started Discussion --
  Problem with configuring BlazeDS with JBOSS
You might want to download the following tutorial
http://sebastien-arbogast.com/2008/04/10/flex-spring-and-blazeds-the-full-stack/
it works on jboss
Best
Matt
View/reply at
Problem with configuring BlazeDS with JBOSS
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Error connecting using RemoteObject

I've developed a simple flex app for listing data in a grid,
which works just fine locally when the remoteobject call is made to
the cfc. However, once the file was moved to a testing server, I
receive the following error when the object call fires off:
[RPC Fault faultString="Send failed"
faultCode="Client.Error.MessageSend"
faultDetail="Channel.Connect.Failed error
NetConnection.Call.BadVersion: : url:
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page is being made from a pc inside the network. Are there any
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Hi
1.May be JCO's are not configured properly.Check your JCO's are up and running by pinging it in ContentAdmin->WebDynpro.
2. its a simple problem of connection pooling. In your JCO connection settings change the maximum connections to 200. It will work.it is good After you execute the Model please release the connection. The reason you are getting this JCO Client null is because the connection is not getting released.
When you say the following code
wdContext.current<BAPI_INPUT>.modelObject().execute();
//Get the reference to the model and release the connection
If your Model name is say "MO_Mymodel" then
MO_Mymodel model = (MO_Mymodel) WDModelFactory.getModelInstance(MO_Mymodel.class);
model.disconnectIfAlive();
This should release your connections. Also ensure you release the connections even if there is a exception :).
Please refer the below forum also:
Error connection using JCO.Client :null
JCO.Client: null
com.sap.mw.jco.JCO$Exception: (102) JCO_ERROR_COMMUNICATION: JCO.Client not
Thanks
susmita

Problem in using the Unreferenced interface

I let my RemoteObject to implement the Unreferenced interface to handle with the unexpectly abort client. but I have a question about how to use such interface in my remote object.
My first thought about it is simple :
class RemoteObject extends UnicastRemoteObject implements Unreferenced {
    public long lock(final int recno) {
        this.lockedRecNo = recno;
        this.lockCookie = LockManager.getInstance().lock(recno);
        return lockcookie;
    public void unreferenced() {
        this.unlock(this.lockedRecNo, this.lockCookie);
}I think it is absolutely wrong under such scenario, since the unreference does not take effect immediately and we surely have only one RemoteObject, during this time. someother client may lock on other records, When performing the unreferenced, we may work on the incorrect record number and cookie.
Then I improved it as
class RemoteObject extends UnicastRemoteObject implements Unreferenced {
    private HashMap lockedRecord = new HashMap();
    public long lock(final int recno) {
        this.lockedRecNo = recno;
        this.lockCookie = LockManager.getInstance().lock(recno);
        lockedRecord.put(new Integer(recno), new Long(lockCookie))
        return lockcookie;
    public void unlock(final int recno, final int cookie) {
        LockManager.getInstance().unlock(recno, cookie);
        lockedRecord.remove(new Integer(recno));
    public void unreferenced() {
        //get all that haven't released lock from the HashMap
        //do a loop
        **loop** {
        this.unlock(this.lockedRecNo, this.lockCookie);
    }There are still some problems. maybe when we are executing the unreference, there is a client who are holding a lock and doing the update action, then we may wrongly release his lock.
I can not figure out a good enough way to handle this. can any one help me on this. thx in advance.

Hi.. Actually, it is not part of the[b] real world problem, I just want to provide a way to clean up the staleness record. If considering this. do you guys thing the approach 2 of the first posting is a way(maybe not a good way), except I should change the hashmap to hashtable to avoid the concurrent accessing... appreciate for any reply from u.

Zend_AMF, RemoteObject problem

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