Nabble - DWR - Dev

Re: File Upload

2009-11-14T03:49:30Z

This means is it not necessary to define form enctype="multipart/form-data"

XMaNIaC wrote:

I'm not sure DWR needs the encode type at all.

Regards

On Sat, Nov 14, 2009 at 6:51 AM, Mehar Bandaru <meharchaitanya@gmail.com>wrote:

>
> Hi I am new to DWR
>
> In my daily usage i admired its beauty and fond of it
>
> But i had some problem with file upload following is my requirement
>
> I had a form which in which there are some text fields and one field is of
> file type
>
> If the user submits the page once after performing all validations i need
> to
> upload the file
> if there are any errors the page will retain with pre entered values along
> with a display message
>
> For this i had written a service where i will call server side code and
> validate the data if there are no errors and page is validated then will
> send an the pass the request to the another service where i will be storing
> all the data captured into the database
>
> If the user submits some data which not passes should retain in the page
> but
> when i use the form enctype="mutipart/form-data" i am getting an error the
> values are not being retained
>
>
> can you help me over this
> --
> View this message in context:
> http://old.nabble.com/File-Upload-tp26347437p26347437.html
> Sent from the DWR - Dev mailing list archive at Nabble.com.
>
>
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>
>

[발송실패 안내] kcy0142@naver.com 으로 메일이 전송되지 못했습니다.

2009-11-14T01:47:57Z

NAVER 메일

고객님께서 보내신 메일이 전송되지 못했습니다.
아래 실패 사유와 해결 방법을 참고 부탁 드립니다.

보낸시간	:	2009-11-14 18:47 (GMT +0900)
받는주소	:	kcy0142@...
메일제목	:	Re: [dwr-dev] File Upload

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Sent Time	:	2009-11-14 18:47 (GMT +0900)
Recipient	:	kcy0142@...
Subject	:	Re: [dwr-dev] File Upload

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See attached message file

I'm not sure DWR needs the encode type at all.

Regards

On Sat, Nov 14, 2009 at 6:51 AM, Mehar Bandaru <meharchaitanya@...> wrote:

Hi I am new to DWR

In my daily usage i admired its beauty and fond of it

But i had some problem with file upload following is my requirement

I had a form which in which there are some text fields and one field is of
file type

If the user submits the page once after performing all validations i need to
upload the file
if there are any errors the page will retain with pre entered values along
with a display message

For this i had written a service where i will call server side code and
validate the data if there are no errors and page is validated then will
send an the pass the request to the another service where i will be storing
all the data captured into the database

If the user submits some data which not passes should retain in the page but
when i use the form enctype="mutipart/form-data" i am getting an error the
values are not being retained

can you help me over this
--
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Re: File Upload

2009-11-14T01:47:53Z

I'm not sure DWR needs the encode type at all.

Regards

On Sat, Nov 14, 2009 at 6:51 AM, Mehar Bandaru <meharchaitanya@...> wrote:

Hi I am new to DWR

In my daily usage i admired its beauty and fond of it

But i had some problem with file upload following is my requirement

I had a form which in which there are some text fields and one field is of
file type

If the user submits the page once after performing all validations i need to
upload the file
if there are any errors the page will retain with pre entered values along
with a display message

For this i had written a service where i will call server side code and
validate the data if there are no errors and page is validated then will
send an the pass the request to the another service where i will be storing
all the data captured into the database

If the user submits some data which not passes should retain in the page but
when i use the form enctype="mutipart/form-data" i am getting an error the
values are not being retained

can you help me over this
--
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Re: File Upload

2009-11-13T22:29:11Z

HI Sidd

Here is my Code snippet

Here is my HTML
======================
<html>
<head>
<script type='text/javascript'
src='/myproj/dwr/interface/Upload.js'></script>
<script type='text/javascript' src='/myproj/dwr/engine.js'></script>
<script type='text/javascript' src='/myproj/dwr/util.js'></script>
<script type="text/javascript">
var userRegistrationModel = {firstName:null,lastName:null,middleName:null};
function registerUser() {
dwr.util.getValues(userRegistrationModel);
var image1 = dwr.util.getValue('photo');
var loc=image1.value;
Upload.validate(userRegistrationModel,callback);

}
function callback(valid) {
if(valid == "valid") {
Upload.uploadImageFile(image1,success);
} else {
dwr.util.setValue("displayMessages", valid,{ escapeHtml:false });
}
}
function success(sent) {
window.location="user_registration_confirmation.jsp";
}
</script>
</head>
<body>

<form name="registrationForm" method="post" enctype="multipart/form-data" action="" onsubmit="return registerUser();">
<div id=displayMessages >

</div>
<div>
<label>FirstName:</label>
<input name="firstName" id="firstName" type="text" size="30" />
</div>
<div>
<label>LastName:</label>
<input name="lastName" id="lastName" type="text" size="30" />
</div>

<div>
<label>MiddleName:</label>
<input name="middleName" id="middleName" type="text" size="30" />
</div>
<div>
<label>Photo</label>
<input name="photo" id="photo" type="file" size="30" />
</div>
<div>
<label> </label>
<input name="submit" value="register" />
</div>
</form>

</body>
</html>

Here is my DWR.xml file
=====================================

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE dwr PUBLIC
"-//GetAhead Limited//DTD Direct Web Remoting 2.0//EN"
"http://getahead.org/dwr/dwr20.dtd">
<dwr>
<allow>
<create creator="new" javascript="Upload" scope="session">
<param name="class" value="org.myproj.upload.UploadService"/>
</create>
<convert converter="bean" match="org.myproj.model.*"/>
</allow>
</dwr>
Here is My Java Code
========================

package org.myproj.model;

public class UserRegistrationModel {
public UserRegistrationModel() {

}

public String getFirstName() {
return firstName;
}

public void setFirstName(String firstName) {
this.firstName = firstName;
}

public String getMiddleName() {
return middleName;
}

public void setMiddleName(String middleName) {
this.middleName = middleName;
}

String firstName;
String LastName;
String middleName;

}

package org.myproj.upload;

public class UploadService{

public UploadService(){
}

public String validate(UserRegistrationModel uModel){
List<String> errorList =new String<ArrayList>();
if(uModel.getFirstName()==null)
{
errorList.add("UserName required <br/>");
}
if(uModel.getLastName()==null)
{
errorList.add("LastName required <br/>");
}
if(uModel.getMiddleName()==null)
{
errorList.add("MiddleName required <br/>");
}
if(errorList.size() >0){
return errorList.toString();
}else{
return "valid";
}
}
public String uploadImageFile(BufferedImage image){
String fname = "D:\\new123.jpg";
File f2 = new File(fname);
ImageIO.write(image, "jpg", f2);
return "success";
}

}

########################################################################

sidd rc wrote:

Hi Mehar
Could you send your piece of code which
you are using to upload your file.
--------------------------------------------------

On Sat, Nov 14, 2009 at 11:21 AM, Mehar Bandaru <meharchaitanya@gmail.com>wrote:

>
> Hi I am new to DWR
>
> In my daily usage i admired its beauty and fond of it
>
> But i had some problem with file upload following is my requirement
>
> I had a form which in which there are some text fields and one field is of
> file type
>
> If the user submits the page once after performing all validations i need
> to
> upload the file
> if there are any errors the page will retain with pre entered values along
> with a display message
>
> For this i had written a service where i will call server side code and
> validate the data if there are no errors and page is validated then will
> send an the pass the request to the another service where i will be storing
> all the data captured into the database
>
> If the user submits some data which not passes should retain in the page
> but
> when i use the form enctype="mutipart/form-data" i am getting an error the
> values are not being retained
>
>
> can you help me over this
> --
> View this message in context:
> http://old.nabble.com/File-Upload-tp26347437p26347437.html
> Sent from the DWR - Dev mailing list archive at Nabble.com.
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: dev-unsubscribe@dwr.dev.java.net
> For additional commands, e-mail: dev-help@dwr.dev.java.net
>
>

Re: File Upload

2009-11-13T21:56:17Z

Hi Mehar
Could you send your piece of code which
you are using to upload your file.
--------------------------------------------------

On Sat, Nov 14, 2009 at 11:21 AM, Mehar Bandaru <meharchaitanya@...> wrote:

Hi I am new to DWR

In my daily usage i admired its beauty and fond of it

But i had some problem with file upload following is my requirement

I had a form which in which there are some text fields and one field is of
file type

If the user submits the page once after performing all validations i need to
upload the file
if there are any errors the page will retain with pre entered values along
with a display message

For this i had written a service where i will call server side code and
validate the data if there are no errors and page is validated then will
send an the pass the request to the another service where i will be storing
all the data captured into the database

If the user submits some data which not passes should retain in the page but
when i use the form enctype="mutipart/form-data" i am getting an error the
values are not being retained

can you help me over this
--
View this message in context: http://old.nabble.com/File-Upload-tp26347437p26347437.html
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File Upload

2009-11-13T21:51:38Z

Hi I am new to DWR

In my daily usage i admired its beauty and fond of it

But i had some problem with file upload following is my requirement

I had a form which in which there are some text fields and one field is of file type

If the user submits the page once after performing all validations i need to upload the file
if there are any errors the page will retain with pre entered values along with a display message

For this i had written a service where i will call server side code and validate the data if there are no errors and page is validated then will send an the pass the request to the another service where i will be storing all the data captured into the database

If the user submits some data which not passes should retain in the page but when i use the form enctype="mutipart/form-data" i am getting an error the values are not being retained

can you help me over this

spring + annotations + dwr

2009-11-03T00:39:23Z

Hello i'm beginer. I write simple chat in dwr3.0 like this

web.xml
<servlet>
<servlet-name>dispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>dispatcher</servlet-name>
<url-pattern>/dwr/*</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>dispatcher</servlet-name>
<url-pattern>*.html</url-pattern>
</servlet-mapping>

dispatcher-servlet.xml
<dwr:configuration>
<dwr:convert type="bean" class="dwr.test" />
</dwr:configuration>
<dwr:controller id="dwrController" debug="true">
<dwr:config-param name="activeReverseAjaxEnabled"
value="true"></dwr:config-param>
</dwr:controller>
<bean id="test" class="dwr.test">
<dwr:remote javascript="test">
<dwr:include method="send" />
</dwr:remote>
</bean>

dwr.test.java
@Service
@RemoteProxy(name = "test")
public class test {
@RemoteMethod
public void send(final String nickname, final String message) {
Browser.withAllSessions(new Runnable() {
public void run() {
Util.addRows("chatLog", new String[][]{{nickname, message}});
}
});
}
}

I'ts works good !

But I need to create message notification (example when add to basket)
In ajaxBasketController invoke dwr.test.message()

public void message() {
ServerContext sc = ServerContextFactory.get();

//got error
//No singleton ServerContext see logs for possible causes and solutions.

WebContext wc = WebContextFactory.get();
//got null
}

Why got errors ?

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problem with push data to a selected user

2009-10-30T02:09:57Z

I have to push data only to a particolar sub-set of user.
i hope that you can answer at least one of my question, maybe the first please!:(..here they are:

1) first of all, i have to push data to only one user. The users open the browser at same page (index.jsp).I use scriptsession, like in http://directwebremoting.org/dwr/reverse-ajax/hints-and-tips.html

i set a session attribute (or key) like user_id and i try to do push to user with id like required user_id:

String userid = ((String)scriptSession.getAttribute("user_id"));
if (userid!=null && userid.equals("roby")){
Browser.withSession(scriptSession.getId(), new Runnable() {
public void run() {
//push data to html page for user with user_id=roby
...
..
}

why doesn't work? it push to everyone user with a browser listen to the same page instead one of them :(

2) if i would to send data to a subset of user there is something filter to use?

3)is script session the right and the only method to differentiate users?

thank you very much

roby

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help problem with extending dwrServlet

2009-10-29T05:32:16Z

hi

i try to extends servlet and invoking it in web.xml but when the browser page opens it says (dbug with firebug utility) that dwr in javascript is not definited..
and give me this error:

GRAVE: Error loading WebappClassLoader
delegate: false
repositories:
/WEB-INF/classes/
----------> Parent Classloader:
org.apache.catalina.loader.StandardClassLoader@be2358
it.netbureau.DwrSessionspike.Initiate
java.lang.ClassNotFoundException: it.netbureau.DwrSessionspike.Initiate
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1387)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1233)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1094)
at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:808)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:129)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Thread.java:619)

the only things i do are:

public class Initiate extends DwrServlet implements ScriptSessionListener{
..

//i override only this method
@Override
public void init(ServletConfig servletConfig) throws ServletException {
super.init(servletConfig);
System.out.println("- ** DWR Servelet initialization completed, add listener now");
//register DWR Session Listener after servelt initialization
d = new DWRWebContextWrapper(WebContextFactory.get());
Container container = d.getWebContext().getContainer();

ScriptSessionManager manager = container.getBean(ScriptSessionManager.class);
System.out.println(manager);
manager.addScriptSessionListener(this);
}
...
..

and web.xml:

<servlet>
<servlet-name>dwr-invoker</servlet-name>


<servlet-class>it.netbureau.DwrSessionspike.Initiate</servlet-class>
<init-param>
<param-name>debug</param-name>
<param-value>true</param-value>
</init-param>
<init-param>
<description>enable/disable Comet(reverse ajax) </description>
<param-name>activeReverseAjaxEnabled</param-name>
<param-value>true</param-value>
</init-param>
<init-param>
<param-name>maxWaitAfterWrite</param-name>
<param-value>-1</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>dwr-invoker</servlet-name>
<url-pattern>/dwr/*</url-pattern>
</servlet-mapping>

dwr 3.0 rc1 is a jar(.class files) in the lib folder of my project and the classes are under /build/classes folder (instead of src: /scr/java) like netbeans 6.7 do..
i wouldn't to include all dwr source and modify dwr code.....

Init was not called, why?

thank you

---------- Initial Header -----------

From : "Lance Java" lance.java@...
To : users@...
Cc :
Date : Thu, 29 Oct 2009 10:33:18 +0000
Subject : Re: [dwr-user] help problem with diferentiating uses with dwr sessions

> Unfortunately, you can't plugin a scriptsessionlistener using the normal DWR
> dependency injection (see
> http://bugs.directwebremoting.org/bugs/browse/DWR-384)
>
> You will need the following code to execute after the DWR servlet
> initializes:
>
> Container container = ServerContextFactory.get().getContainer();
> ScriptSessionManager manager =
> container.getBean(ScriptSessionManager.class);
> manager.addScriptSessionListener(myScripSessionListener);
>
> Here's a couple of places you can do this:
> 1. Extend the DWR servlet and execute the code after the DWR servlet
> initializes
> 2. Execute the code in a servlet that has a <load-on-startup /> value larger
> than the DWR servlet.
>
> Cheers,
> Lance.
>
>
> 2009/10/29 ytrewq2002@... <ytrewq2002@...>
>
> > hi to all,
> >
> > problem:
> > i write a dwr push.. a web page have got a textbox with a button. only the
> > user that write abc and send with button to dwr can get the push data
> > (BrowserwithPage and other update all pages so don't works for me i
> > suppose).
> >
> > my solution:
> >
> > i begin with reading session created (1) and then (2) apply
> > push;
> > I read about to differentiate users using scriptsession at:
> > http://directwebremoting.org/dwr/reverse-ajax/hints-and-tips.html:
> >
> > 1)
> >
> > when a try to construct a listener it doesn't works:
> >
> > public class Initiate implements ScriptSessionListener{
> > ..
> >
> > public void sessionCreated(ScriptSessionEvent arg0) {
> > System.out.println("IDSessionDwrListener: new session created for
> > user " + u.getUser_id()
> > + "on WebContext: " + d.getWebContext());
> > }
> >
> > public void sessionDestroyed(ScriptSessionEvent arg0) {
> > System.out.println("IDSessionDwrListener: Session destroyed" +
> > u.getUser_id()
> > + "on WebContext: " + d.getWebContext());
> > }
> > ..
> >
> > public void startService(String id_user){
> > ..
> > Container container = d.getWebContext().getContainer();
> > ScriptSessionManager manager =
> > container.getBean(ScriptSessionManager.class);
> > manager.addScriptSessionListener(this);
> > ..
> > }
> >
> > so i try to add to web.xml (servlet) this:
> >
> > <init-param>
> > <description>enable SessionScriptListener</description>
> >
> > <param-name>org.directwebremoting.event.ScriptSessionListener</param-name>
> > <param-value>it.netbureau.DwrSessionSpike.Initiate</param-value>
> > </init-param>
> > </servlet>
> >
> > but i get from dwr:
> > GRAVE: - Can't use : it.netbureau.DwrSessionSpike.Initiate@14c5b37 to
> > implement org.directwebremoting.event.ScriptSessionListener. Reason:
> > java.lang.ClassNotFoundException:
> > it.netbureau.DwrSessionSpike.Initiate@14c5b37
> > org.directwebremoting.impl.DefaultContainer@2da5a6
> > org.directwebremoting.impl.DefaultScriptSessionManager@1b09282
> >
> > why?
> >
> > 2) i try to set the value properties of a session:
> >
> > webContext d = getWebContext..
> >
> > if (u.getUser_id().equals("abc")){
> > ScriptSession scriptSession = d.getScriptSession();
> > scriptSession.setAttribute("user_id", "abc");
> > }
> > //if i am user abc so pushing data
> > ScriptSession scriptSession = d.getScriptSession();
> > String userid = ((String)scriptSession.getAttribute("user_id"));
> > if (userid!=null && userid.equals(userIDSelected)){
> > System.out.println("i'm abc");
> > }
> >
> > .. ok this work open 2, 3 browser and write abc, dfg, hjj
> > only one time "abc" appear on systm.out
> > so now how can say to dwr to give data only to user (session with abc?)?
> >
> > Browser.withPage(page, new Runnable() { doesn't work
> > Browser.withSession could be? i used it but it doesn't work, maybe i'm
> > wrong? how does works?
> >
> >
> > please help me, i'm terrible late in the project developping
> > thank you very much
> >
> > Roby
> >
> >
> > ---------------------------------------------------------------------
> > To unsubscribe, e-mail: users-unsubscribe@...
> > For additional commands, e-mail: users-help@...
> >
> >
>

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help problem with diferentiating uses with dwr sessions

2009-10-29T02:51:55Z

hi to all,

problem:
i write a dwr push.. a web page have got a textbox with a button. only the user that write abc and send with button to dwr can get the push data (BrowserwithPage and other update all pages so don't works for me i suppose).

my solution:

i begin with reading session created (1) and then (2) apply
push;
I read about to differentiate users using scriptsession at:
http://directwebremoting.org/dwr/reverse-ajax/hints-and-tips.html:

1)

when a try to construct a listener it doesn't works:

public class Initiate implements ScriptSessionListener{
..

public void sessionCreated(ScriptSessionEvent arg0) {
System.out.println("IDSessionDwrListener: new session created for user " + u.getUser_id()
+ "on WebContext: " + d.getWebContext());
}

public void sessionDestroyed(ScriptSessionEvent arg0) {
System.out.println("IDSessionDwrListener: Session destroyed" + u.getUser_id()
+ "on WebContext: " + d.getWebContext());
}
..

public void startService(String id_user){
..
Container container = d.getWebContext().getContainer();
ScriptSessionManager manager = container.getBean(ScriptSessionManager.class);
manager.addScriptSessionListener(this);
..
}

so i try to add to web.xml (servlet) this:

<init-param>
<description>enable SessionScriptListener</description>
<param-name>org.directwebremoting.event.ScriptSessionListener</param-name>
<param-value>it.netbureau.DwrSessionSpike.Initiate</param-value>
</init-param>
</servlet>

but i get from dwr:
GRAVE: - Can't use : it.netbureau.DwrSessionSpike.Initiate@14c5b37 to implement org.directwebremoting.event.ScriptSessionListener. Reason: java.lang.ClassNotFoundException: it.netbureau.DwrSessionSpike.Initiate@14c5b37
org.directwebremoting.impl.DefaultContainer@2da5a6
org.directwebremoting.impl.DefaultScriptSessionManager@1b09282

why?

2) i try to set the value properties of a session:

webContext d = getWebContext..

if (u.getUser_id().equals("abc")){
ScriptSession scriptSession = d.getScriptSession();
scriptSession.setAttribute("user_id", "abc");
}
//if i am user abc so pushing data
ScriptSession scriptSession = d.getScriptSession();
String userid = ((String)scriptSession.getAttribute("user_id"));
if (userid!=null && userid.equals(userIDSelected)){
System.out.println("i'm abc");
}

.. ok this work open 2, 3 browser and write abc, dfg, hjj
only one time "abc" appear on systm.out
so now how can say to dwr to give data only to user (session with abc?)?

Browser.withPage(page, new Runnable() { doesn't work
Browser.withSession could be? i used it but it doesn't work, maybe i'm wrong? how does works?

please help me, i'm terrible late in the project developping
thank you very much

Roby

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RE: DWR in portal application

2009-10-26T12:21:45Z

Not being totally related, there has been some recent discussion on portal scenarios on the users list:

http://www.nabble.com/Http-Session-problem-td25356136.html

Best regards

Mike Wilson

From: Vishnupriya Koppuravuri [mailto:vishnupriya.koppuravuri@...]
Sent: den 26 oktober 2009 13:00
To: dev@...
Subject: [dwr-dev] DWR in portal application

Hi,

i want to implement chatting in my portlet application

I want to implement reverse ajax in that application Can i use Dwr2.0 version

can u please tell me the entire procedure for including dwr in my portal application

Vishnu Priya Koppuravuri
Tata Consultancy Services
Mailto: vishnupriya.koppuravuri@...
Website: http://www.tcs.com
____________________________________________
Experience certainty. IT Services
Business Solutions
Outsourcing
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RE: DWR in portal application

2009-10-26T06:24:54Z

You'll find pushlets best suited for a chat application.

From: vishnupriya.koppuravuri@...
To: dev@...
Date: Mon, 26 Oct 2009 17:30:12 +0530
Subject: [dwr-dev] DWR in portal application

Hi,

i want to implement chatting in my portlet application

I want to implement reverse ajax in that application Can i use Dwr2.0 version

can u please tell me the entire procedure for including dwr in my portal application

Vishnu Priya Koppuravuri
Tata Consultancy Services
Mailto: vishnupriya.koppuravuri@...
Website: http://www.tcs.com
____________________________________________
Experience certainty. IT Services
Business Solutions
Outsourcing
____________________________________________

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Windows 7: It helps you do more. Explore Windows 7.

Re: DWR in portal application

2009-10-26T05:41:51Z

2009/10/26 Vishnupriya Koppuravuri <vishnupriya.koppuravuri@...>:

> Hi,
> i want to implement chatting in my portlet application
> I want to implement reverse ajax in that application Can i use Dwr2.0
> version
> can u please tell me the entire procedure for including dwr in my portal
> application
>
>
> Vishnu Priya Koppuravuri
> Tata Consultancy Services
> Mailto: vishnupriya.koppuravuri@...
> Website: http://www.tcs.com
> ____________________________________________
> Experience certainty. IT Services
> Business Solutions
> Outsourcing
> ____________________________________________
>
> =====-----=====-----=====
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> message and/or attachments to it may contain
> confidential or privileged information. If you are
> not the intended recipient, any dissemination, use,
> review, distribution, printing or copying of the
> information contained in this e-mail message
> and/or attachments to it are strictly prohibited. If
> you have received this communication in error,
> please notify us by reply e-mail or telephone and
> immediately and permanently delete the message
> and any attachments. Thank you
>
>
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Dear Sir, xmpp I propose which is strong chat modernization. dwr was
less active lately yet combining xmpp and dwr is my advice where you
also may look at my dwr sample menu builder javascript⇌mysql code
disponible montao.googlecode.com with kind regards,
Nick Rosencrantz

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[발송실패 안내] kcy0142@naver.com 으로 메일이 전송되지 못했습니다.

2009-10-26T05:38:19Z

NAVER 메일

고객님께서 보내신 메일이 전송되지 못했습니다.
아래 실패 사유와 해결 방법을 참고 부탁 드립니다.

보낸시간	:	2009-10-26 21:38 (GMT +0900)
받는주소	:	kcy0142@...
메일제목	:	Re: [dwr-dev] DWR in portal application

실패사유	:	받는 사람이 회원님의 메일을 수신차단 하였습니다.
사유원문	:	Your mail was denied from the receiver.
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보내신 메일의 원본을 첨부 합니다. 첨부 파일을 확인해 주십시오.

Your mail couldn't be delivered.
Please check the reason, and retry sending your message.

Sent Time	:	2009-10-26 21:38 (GMT +0900)
Recipient	:	kcy0142@...
Subject	:	Re: [dwr-dev] DWR in portal application

Host Said	:	Your mail was denied from the receiver.

See attached message file

Yes, you can use DWR 2.0. No, we cannot tell you the complete procedure. Read de docs please.

Regards

On Mon, Oct 26, 2009 at 1:00 PM, Vishnupriya Koppuravuri <vishnupriya.koppuravuri@...> wrote:

Hi,
i want to implement chatting in my portlet application

I want to implement reverse ajax in that application Can i use Dwr2.0 version
can u please tell me the entire procedure for including dwr in my portal application

Vishnu Priya Koppuravuri
Tata Consultancy Services
Mailto: vishnupriya.koppuravuri@...
Website: http://www.tcs.com
____________________________________________
Experience certainty. IT Services
Business Solutions
Outsourcing
____________________________________________
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Re: DWR in portal application

2009-10-26T05:38:11Z

Yes, you can use DWR 2.0. No, we cannot tell you the complete procedure. Read de docs please.

Regards

On Mon, Oct 26, 2009 at 1:00 PM, Vishnupriya Koppuravuri <vishnupriya.koppuravuri@...> wrote:

Hi,
i want to implement chatting in my portlet application

I want to implement reverse ajax in that application Can i use Dwr2.0 version
can u please tell me the entire procedure for including dwr in my portal application

Vishnu Priya Koppuravuri
Tata Consultancy Services
Mailto: vishnupriya.koppuravuri@...
Website: http://www.tcs.com
____________________________________________
Experience certainty. IT Services
Business Solutions
Outsourcing
____________________________________________
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Notice: The information contained in this e-mail
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DWR in portal application

2009-10-26T05:00:12Z

Hi,

i want to implement chatting in my portlet application

I want to implement reverse ajax in that application Can i use Dwr2.0 version

can u please tell me the entire procedure for including dwr in my portal application

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hi

2009-10-26T04:57:12Z

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Re: ConcurrentModificationException on DefaultConverterManager.getConverterAssignableFrom

2009-10-24T08:01:01Z

http://bugs.directwebremoting.org/jira/browse/DWR-427

tpeierls wrote:

> And remember this is not just a 2.x issue; it's present in the trunk, too.
>
> I'm dismayed because there are probably a zillion places where DWR has
> non-final, non-volatile, unguarded references to non-thread-safe objects,
> and now they are all called into question. I can't believe I let myself
> relax into thinking everything was OK. :-(
>
> --tim
>
>
> davidmarginian wrote:
>
>> I am really surprised we haven't spotted this before. We were wanting to
>> push out a 2.0.6 release anyway so I will work on this and hopefully push
>> something out early-mid next week.
>>
>> On Fri, Oct 23, 2009 at 8:31 AM, Mike Wilson <mikewse@...> wrote:
>>
>>
>>> Yes, I haven't noticed this before but it is pretty clear that
>>> DefaultConverterManager.getConverterAssignableFrom() mutates the
>>> converters
>>> field along the way. It caches results of previous lookups, and this
>>> happens
>>> in (after-init) run-time.
>>>
>
>

__________ Information from ESET NOD32 Antivirus, version of virus signature database 4537 (20091023) __________

The message was checked by ESET NOD32 Antivirus.

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Re: ConcurrentModificationException on DefaultConverterManager.getConverterAssignableFrom

2009-10-23T11:15:16Z

And remember this is not just a 2.x issue; it's present in the trunk, too.

I'm dismayed because there are probably a zillion places where DWR has non-final, non-volatile, unguarded references to non-thread-safe objects, and now they are all called into question. I can't believe I let myself relax into thinking everything was OK. :-(

--tim

davidmarginian wrote:

I am really surprised we haven't spotted this before. We were wanting to
push out a 2.0.6 release anyway so I will work on this and hopefully push
something out early-mid next week.

On Fri, Oct 23, 2009 at 8:31 AM, Mike Wilson <mikewse@hotmail.com> wrote:

> Yes, I haven't noticed this before but it is pretty clear that
> DefaultConverterManager.getConverterAssignableFrom() mutates the converters
> field along the way. It caches results of previous lookups, and this happens
> in (after-init) run-time.

Re: ConcurrentModificationException on DefaultConverterManager.getConverterAssignableFrom

2009-10-23T09:26:25Z

I am really surprised we haven't spotted this before. We were wanting to push out a 2.0.6 release anyway so I will work on this and hopefully push something out early-mid next week.

On Fri, Oct 23, 2009 at 8:31 AM, Mike Wilson <mikewse@...> wrote:

Yes, I haven't noticed this before but it is pretty clear that DefaultConverterManager.getConverterAssignableFrom() mutates the converters field along the way. It caches results of previous lookups, and this happens in (after-init) run-time.

Btw, DWR 2.x is built against Java 1.3.

Fabio: would you mind adding this as a bug to our JIRA? I think we will want to fix it for 2.0.6 and 3.0RC2.

Best regards

Mike Wilson
From: tpeierls [mailto:tim@...]
Sent: den 23 oktober 2009 15:58
To: dev@...
Subject: Re: [dwr-dev] ConcurrentModificationException on DefaultConverterManager.getConverterAssignableFrom
In the current 2.x source (and on the trunk), converters is a non-final, non-volatile field, initialized with an empty HashMap. Last time I looked at this code, I assumed that all mutative calls that affect converters (addConverter and setConverters) were confined to a single thread during servlet init, after which all access to converters was non-mutative and made during requests -- in which case, everything would be fine. (I'm taking the standard view that there is a happens-before edge between servlet init and servlet request handling.)

However, Fabio's example makes it clear that there can be mutative access to converters during request handling as a result of calls to getConverterAssignableFrom. That means all bets are off and that this is a pretty serious concurrency bug.

I think the following steps should be taken for the converters field (and other fields like it):
The converters field should be final.
The converters field should be initialized with an empty ConcurrentHashMap. For the 2.x branch, if Java 1.4 compatibility is still required, use a plain HashMap wrapped with Collections.synchronizedMap().
The setConverters method should be implemented as
    synchronized (this.converters) {
        this.converters.clear();
        this.converters.putAll(converters);
    }
  
I posted some rules for thread-safety that might prove useful.

davidmarginian wrote:

Fabio, I took a quick look at the latest 2.x source (which is not 2.0.2). I didn't see anything that looked alarming - I did a search online and so a few things that may indicate bugs in WebSphere but I can' confirm or deny this. Any one else have thoughts here?

View this message in context: Re: ConcurrentModificationException on DefaultConverterManager.getConverterAssignableFrom
Sent from the DWR - Dev mailing list archive at Nabble.com.

RE: ConcurrentModificationException on DefaultConverterManager.getConverterAssignableFrom

2009-10-23T07:31:26Z

Yes, I haven't noticed this before but it is pretty clear that DefaultConverterManager.getConverterAssignableFrom() mutates the converters field along the way. It caches results of previous lookups, and this happens in (after-init) run-time.

Btw, DWR 2.x is built against Java 1.3.

Fabio: would you mind adding this as a bug to our JIRA? I think we will want to fix it for 2.0.6 and 3.0RC2.

Best regards

Mike Wilson

From: tpeierls [mailto:tim@...]
Sent: den 23 oktober 2009 15:58
To: dev@...
Subject: Re: [dwr-dev] ConcurrentModificationException on DefaultConverterManager.getConverterAssignableFrom

In the current 2.x source (and on the trunk), converters is a non-final, non-volatile field, initialized with an empty HashMap. Last time I looked at this code, I assumed that all mutative calls that affect converters (addConverter and setConverters) were confined to a single thread during servlet init, after which all access to converters was non-mutative and made during requests -- in which case, everything would be fine. (I'm taking the standard view that there is a happens-before edge between servlet init and servlet request handling.)

However, Fabio's example makes it clear that there can be mutative access to converters during request handling as a result of calls to getConverterAssignableFrom. That means all bets are off and that this is a pretty serious concurrency bug.

I think the following steps should be taken for the converters field (and other fields like it):
The converters field should be final.
The converters field should be initialized with an empty ConcurrentHashMap. For the 2.x branch, if Java 1.4 compatibility is still required, use a plain HashMap wrapped with Collections.synchronizedMap().
The setConverters method should be implemented as
    synchronized (this.converters) {
        this.converters.clear();
        this.converters.putAll(converters);
    }
  
I posted some rules for thread-safety that might prove useful.

davidmarginian wrote:

Fabio, I took a quick look at the latest 2.x source (which is not 2.0.2). I didn't see anything that looked alarming - I did a search online and so a few things that may indicate bugs in WebSphere but I can' confirm or deny this. Any one else have thoughts here?

View this message in context: Re: ConcurrentModificationException on DefaultConverterManager.getConverterAssignableFrom
Sent from the DWR - Dev mailing list archive at Nabble.com.

Re: ConcurrentModificationException on DefaultConverterManager.getConverterAssignableFrom

2009-10-23T06:57:37Z

In the current 2.x source (and on the trunk), converters is a non-final, non-volatile field, initialized with an empty HashMap. Last time I looked at this code, I assumed that all mutative calls that affect converters (addConverter and setConverters) were confined to a single thread during servlet init, after which all access to converters was non-mutative and made during requests -- in which case, everything would be fine. (I'm taking the standard view that there is a happens-before edge between servlet init and servlet request handling.)

However, Fabio's example makes it clear that there can be mutative access to converters during request handling as a result of calls to getConverterAssignableFrom. That means all bets are off and that this is a pretty serious concurrency bug.

I think the following steps should be taken for the converters field (and other fields like it):

The converters field should be final.
The converters field should be initialized with an empty ConcurrentHashMap. For the 2.x branch, if Java 1.4 compatibility is still required, use a plain HashMap wrapped with Collections.synchronizedMap().

The setConverters method should be implemented as

    synchronized (this.converters) {
        this.converters.clear();
        this.converters.putAll(converters);
    }

I posted some rules for thread-safety that might prove useful.

davidmarginian wrote:

Fabio, I took a quick look at the latest 2.x source (which is not 2.0.2). I didn't see anything that looked alarming - I did a search online and so a few things that may indicate bugs in WebSphere but I can' confirm or deny this. Any one else have thoughts here?

Re: ConcurrentModificationException on DefaultConverterManager.getConverterAssignableFrom

2009-10-23T06:31:37Z

Fabio,

I took a quick look at the latest 2.x source (which is not 2.0.2). I didn't see anything that looked alarming - I did a search online and so a few things that may indicate bugs in WebSphere but I can' confirm or deny this. Any one else have thoughts here?

On Fri, Oct 23, 2009 at 4:51 AM, Fabio Collini <fcollini@...> wrote:

Hi, I am using dwr 2.0.2 in my web application on a websphere 6.1. Today I have this exception and I had to restart server to fix it:

org.directwebremoting.extend.MarshallException: Error marshalling it.omniagroup.lgi.filtri.model.beansext.Regola: concurrent access to HashMap attempted by Thread[WebContainer : 1,5,main]. See the logs for more details.

at org.directwebremoting.convert.BasicObjectConverter.convertOutbound(BasicObjectConverter.java:200)

at org.directwebremoting.dwrp.DefaultConverterManager.convertOutbound(DefaultConverterManager.java:192)

at org.directwebremoting.convert.BasicObjectConverter.convertOutbound(BasicObjectConverter.java:189)

at org.directwebremoting.dwrp.DefaultConverterManager.convertOutbound(DefaultConverterManager.java:192)

at org.directwebremoting.convert.CollectionConverter.convertOutbound(CollectionConverter.java:206)

at it.omniagroup.lgi.utilita.griglia.GrigliaModelPaginatoConverter.convertOutbound(GrigliaModelPaginatoConverter.java:69)

at org.directwebremoting.dwrp.DefaultConverterManager.convertOutbound(DefaultConverterManager.java:192)

at org.directwebremoting.convert.BasicObjectConverter.convertOutbound(BasicObjectConverter.java:189)

at org.directwebremoting.dwrp.DefaultConverterManager.convertOutbound(DefaultConverterManager.java:192)

at org.directwebremoting.convert.CollectionConverter.convertOutbound(CollectionConverter.java:206)

at it.omniagroup.lgi.utilita.griglia.GrigliaModelPaginatoConverter.convertOutbound(GrigliaModelPaginatoConverter.java:69)

at org.directwebremoting.dwrp.DefaultConverterManager.convertOutbound(DefaultConverterManager.java:192)

at org.directwebremoting.extend.ScriptBufferUtil.createOutput(ScriptBufferUtil.java:56)
at org.directwebremoting.dwrp.BaseCallMarshaller$CallScriptConduit.addScript(BaseCallMarshaller.java:512)

at org.directwebremoting.extend.EnginePrivate.remoteHandleCallback(EnginePrivate.java:56)
at org.directwebremoting.dwrp.BaseCallMarshaller.marshallOutbound(BaseCallMarshaller.java:330)

at org.directwebremoting.servlet.PlainCallHandler.handle(PlainCallHandler.java:53)
at org.directwebremoting.servlet.UrlProcessor.handle(UrlProcessor.java:101)

at org.directwebremoting.servlet.DwrServlet.doPost(DwrServlet.java:146)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:763)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1095)

at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1036)
at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:145)

at com.opensymphony.module.sitemesh.filter.PageFilter.parsePage(PageFilter.java:119)
at com.opensymphony.module.sitemesh.filter.PageFilter.doFilter(PageFilter.java:55)

at com.ibm.ws.webcontainer.filter.FilterInstanceWrapper.doFilter(FilterInstanceWrapper.java:190)
at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:130)
at com.ibm.ws.webcontainer.filter.WebAppFilterChain._doFilter(WebAppFilterChain.java:87)

at com.ibm.ws.webcontainer.filter.WebAppFilterManager.doFilter(WebAppFilterManager.java:832)
at com.ibm.ws.webcontainer.filter.WebAppFilterManager.doFilter(WebAppFilterManager.java:679)

at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:565)
at com.ibm.ws.wswebcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:478)

at com.ibm.ws.webcontainer.servlet.CacheServletWrapper.handleRequest(CacheServletWrapper.java:90)
at com.ibm.ws.webcontainer.WebContainer.handleRequest(WebContainer.java:748)
at com.ibm.ws.wswebcontainer.WebContainer.handleRequest(WebContainer.java:1461)

at com.ibm.ws.webcontainer.channel.WCChannelLink.ready(WCChannelLink.java:118)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleDiscrimination(HttpInboundLink.java:458)

at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleNewInformation(HttpInboundLink.java:387)

at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.ready(HttpInboundLink.java:267)
at com.ibm.ws.tcp.channel.impl.NewConnectionInitialReadCallback.sendToDiscriminators(NewConnectionInitialReadCallback.java:214)

at com.ibm.ws.tcp.channel.impl.NewConnectionInitialReadCallback.complete(NewConnectionInitialReadCallback.java:113)

at com.ibm.ws.tcp.channel.impl.AioReadCompletionListener.futureCompleted(AioReadCompletionListener.java:165)

at com.ibm.io.async.AbstractAsyncFuture.invokeCallback(AbstractAsyncFuture.java:217)
at com.ibm.io.async.AsyncChannelFuture.fireCompletionActions(AsyncChannelFuture.java:161)

at com.ibm.io.async.AsyncFuture.completed(AsyncFuture.java:136)
at com.ibm.io.async.ResultHandler.complete(ResultHandler.java:195)

at com.ibm.io.async.ResultHandler.runEventProcessingLoop(ResultHandler.java:743)
at com.ibm.io.async.ResultHandler$2.run(ResultHandler.java:873)

at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1473)
Caused by: java.util.ConcurrentModificationException: concurrent access to HashMap attempted by Thread[WebContainer : 1,5,main]

at java.util.HashMap.onExit(HashMap.java:226)
at java.util.HashMap.transfer(HashMap.java:690)

at java.util.HashMap.resize(HashMap.java:676)
at java.util.HashMap.addEntry(HashMap.java:1049)

at java.util.HashMap.put(HashMap.java:561)
at org.directwebremoting.dwrp.DefaultConverterManager.getConverterAssignableFrom(DefaultConverterManager.java:406)

at org.directwebremoting.dwrp.DefaultConverterManager.getConverter(DefaultConverterManager.java:302)

at org.directwebremoting.dwrp.DefaultConverterManager.getConverter(DefaultConverterManager.java:234)

at org.directwebremoting.dwrp.DefaultConverterManager.convertOutbound(DefaultConverterManager.java:185)

at org.directwebremoting.convert.BasicObjectConverter.convertOutbound(BasicObjectConverter.java:189)

... 49 more

[10/23/09 7:44:12:338 CEST] 00000040 CollectionCon W org.directwebremoting.util.CommonsLoggingOutput warn Conversion error for it.omniagroup.lgi.utilita.griglia.GrigliaModelPaginato.

org.directwebremoting.extend.MarshallException: Error marshalling it.omniagroup.lgi.filtri.model.beansext.Regola: concurrent access to HashMap attempted by Thread[WebContainer : 6,5,main]. See the logs for more details.

at org.directwebremoting.convert.BasicObjectConverter.convertOutbound(BasicObjectConverter.java:200)

at org.directwebremoting.dwrp.DefaultConverterManager.convertOutbound(DefaultConverterManager.java:192)

at org.directwebremoting.convert.BasicObjectConverter.convertOutbound(BasicObjectConverter.java:189)

at org.directwebremoting.dwrp.DefaultConverterManager.convertOutbound(DefaultConverterManager.java:192)

at org.directwebremoting.convert.CollectionConverter.convertOutbound(CollectionConverter.java:206)

at it.omniagroup.lgi.utilita.griglia.GrigliaModelPaginatoConverter.convertOutbound(GrigliaModelPaginatoConverter.java:69)

at org.directwebremoting.dwrp.DefaultConverterManager.convertOutbound(DefaultConverterManager.java:192)

at org.directwebremoting.convert.BasicObjectConverter.convertOutbound(BasicObjectConverter.java:189)

at org.directwebremoting.dwrp.DefaultConverterManager.convertOutbound(DefaultConverterManager.java:192)

at org.directwebremoting.convert.CollectionConverter.convertOutbound(CollectionConverter.java:206)

at it.omniagroup.lgi.utilita.griglia.GrigliaModelPaginatoConverter.convertOutbound(GrigliaModelPaginatoConverter.java:69)

at org.directwebremoting.dwrp.DefaultConverterManager.convertOutbound(DefaultConverterManager.java:192)

at org.directwebremoting.extend.ScriptBufferUtil.createOutput(ScriptBufferUtil.java:56)
at org.directwebremoting.dwrp.BaseCallMarshaller$CallScriptConduit.addScript(BaseCallMarshaller.java:512)

at org.directwebremoting.extend.EnginePrivate.remoteHandleCallback(EnginePrivate.java:56)
at org.directwebremoting.dwrp.BaseCallMarshaller.marshallOutbound(BaseCallMarshaller.java:330)

at org.directwebremoting.servlet.PlainCallHandler.handle(PlainCallHandler.java:53)
at org.directwebremoting.servlet.UrlProcessor.handle(UrlProcessor.java:101)

at org.directwebremoting.servlet.DwrServlet.doPost(DwrServlet.java:146)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:763)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1095)

at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1036)
at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:145)

at com.opensymphony.module.sitemesh.filter.PageFilter.parsePage(PageFilter.java:119)
at com.opensymphony.module.sitemesh.filter.PageFilter.doFilter(PageFilter.java:55)

at com.ibm.ws.webcontainer.filter.FilterInstanceWrapper.doFilter(FilterInstanceWrapper.java:190)
at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:130)
at com.ibm.ws.webcontainer.filter.WebAppFilterChain._doFilter(WebAppFilterChain.java:87)

at com.ibm.ws.webcontainer.filter.WebAppFilterManager.doFilter(WebAppFilterManager.java:832)
at com.ibm.ws.webcontainer.filter.WebAppFilterManager.doFilter(WebAppFilterManager.java:679)

at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:565)
at com.ibm.ws.wswebcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:478)

at com.ibm.ws.webcontainer.servlet.CacheServletWrapper.handleRequest(CacheServletWrapper.java:90)
at com.ibm.ws.webcontainer.WebContainer.handleRequest(WebContainer.java:748)
at com.ibm.ws.wswebcontainer.WebContainer.handleRequest(WebContainer.java:1461)

at com.ibm.ws.webcontainer.channel.WCChannelLink.ready(WCChannelLink.java:118)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleDiscrimination(HttpInboundLink.java:458)

at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleNewInformation(HttpInboundLink.java:387)

at com.ibm.ws.http.channel.inbound.impl.HttpICLReadCallback.complete(HttpICLReadCallback.java:102)

at com.ibm.ws.tcp.channel.impl.AioReadCompletionListener.futureCompleted(AioReadCompletionListener.java:165)

at com.ibm.io.async.AbstractAsyncFuture.invokeCallback(AbstractAsyncFuture.java:217)
at com.ibm.io.async.AsyncChannelFuture.fireCompletionActions(AsyncChannelFuture.java:161)

at com.ibm.io.async.AsyncFuture.completed(AsyncFuture.java:136)
at com.ibm.io.async.ResultHandler.complete(ResultHandler.java:195)

at com.ibm.io.async.ResultHandler.runEventProcessingLoop(ResultHandler.java:743)
at com.ibm.io.async.ResultHandler$2.run(ResultHandler.java:873)

at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1473)
Caused by: java.util.ConcurrentModificationException: concurrent access to HashMap attempted by Thread[WebContainer : 6,5,main]

at java.util.HashMap.onEntry(HashMap.java:214)
at java.util.HashMap.transfer(HashMap.java:686)

at java.util.HashMap.resize(HashMap.java:676)
at java.util.HashMap.addEntry(HashMap.java:1049)

at java.util.HashMap.put(HashMap.java:561)
at org.directwebremoting.dwrp.DefaultConverterManager.getConverterAssignableFrom(DefaultConverterManager.java:406)

at org.directwebremoting.dwrp.DefaultConverterManager.getConverter(DefaultConverterManager.java:302)

at org.directwebremoting.dwrp.DefaultConverterManager.getConverter(DefaultConverterManager.java:234)

at org.directwebremoting.dwrp.DefaultConverterManager.convertOutbound(DefaultConverterManager.java:185)

at org.directwebremoting.convert.BasicObjectConverter.convertOutbound(BasicObjectConverter.java:189)

... 47 more

I think that converters map declared at line 439 should be syncrohized.

Best regards
Fabio

--

OmniaSoftware^® s.r.l.
Dott. Fabio Collini
(Analista Programmatore)
Via Melloni, 29 - 50019 Sesto F.no (FI)
Tel. 0554200158 int.208
fcollini@...
sceri@...http://www.omniagroup.it/

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ConcurrentModificationException on DefaultConverterManager.getConverterAssignableFrom

2009-10-23T03:49:10Z

Hi, I am using dwr 2.0.2 in my web application on a websphere 6.1. Today I have this exception and I had to restart server to fix it:

org.directwebremoting.extend.MarshallException: Error marshalling it.omniagroup.lgi.filtri.model.beansext.Regola: concurrent access to HashMap attempted by Thread[WebContainer : 1,5,main]. See the logs for more details.

at org.directwebremoting.convert.BasicObjectConverter.convertOutbound(BasicObjectConverter.java:200)

at org.directwebremoting.dwrp.DefaultConverterManager.convertOutbound(DefaultConverterManager.java:192)

at org.directwebremoting.convert.BasicObjectConverter.convertOutbound(BasicObjectConverter.java:189)

at org.directwebremoting.dwrp.DefaultConverterManager.convertOutbound(DefaultConverterManager.java:192)

at org.directwebremoting.convert.CollectionConverter.convertOutbound(CollectionConverter.java:206)

at it.omniagroup.lgi.utilita.griglia.GrigliaModelPaginatoConverter.convertOutbound(GrigliaModelPaginatoConverter.java:69)

at org.directwebremoting.dwrp.DefaultConverterManager.convertOutbound(DefaultConverterManager.java:192)

at org.directwebremoting.convert.BasicObjectConverter.convertOutbound(BasicObjectConverter.java:189)

at org.directwebremoting.dwrp.DefaultConverterManager.convertOutbound(DefaultConverterManager.java:192)

at org.directwebremoting.convert.CollectionConverter.convertOutbound(CollectionConverter.java:206)

at it.omniagroup.lgi.utilita.griglia.GrigliaModelPaginatoConverter.convertOutbound(GrigliaModelPaginatoConverter.java:69)

at org.directwebremoting.dwrp.DefaultConverterManager.convertOutbound(DefaultConverterManager.java:192)

at org.directwebremoting.extend.ScriptBufferUtil.createOutput(ScriptBufferUtil.java:56)

at org.directwebremoting.dwrp.BaseCallMarshaller$CallScriptConduit.addScript(BaseCallMarshaller.java:512)

at org.directwebremoting.extend.EnginePrivate.remoteHandleCallback(EnginePrivate.java:56)

at org.directwebremoting.dwrp.BaseCallMarshaller.marshallOutbound(BaseCallMarshaller.java:330)

at org.directwebremoting.servlet.PlainCallHandler.handle(PlainCallHandler.java:53)

at org.directwebremoting.servlet.UrlProcessor.handle(UrlProcessor.java:101)

at org.directwebremoting.servlet.DwrServlet.doPost(DwrServlet.java:146)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:763)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)

at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1095)

at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1036)

at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:145)

at com.opensymphony.module.sitemesh.filter.PageFilter.parsePage(PageFilter.java:119)

at com.opensymphony.module.sitemesh.filter.PageFilter.doFilter(PageFilter.java:55)

at com.ibm.ws.webcontainer.filter.FilterInstanceWrapper.doFilter(FilterInstanceWrapper.java:190)

at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:130)

at com.ibm.ws.webcontainer.filter.WebAppFilterChain._doFilter(WebAppFilterChain.java:87)

at com.ibm.ws.webcontainer.filter.WebAppFilterManager.doFilter(WebAppFilterManager.java:832)

at com.ibm.ws.webcontainer.filter.WebAppFilterManager.doFilter(WebAppFilterManager.java:679)

at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:565)

at com.ibm.ws.wswebcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:478)

at com.ibm.ws.webcontainer.servlet.CacheServletWrapper.handleRequest(CacheServletWrapper.java:90)

at com.ibm.ws.webcontainer.WebContainer.handleRequest(WebContainer.java:748)

at com.ibm.ws.wswebcontainer.WebContainer.handleRequest(WebContainer.java:1461)

at com.ibm.ws.webcontainer.channel.WCChannelLink.ready(WCChannelLink.java:118)

at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleDiscrimination(HttpInboundLink.java:458)

at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleNewInformation(HttpInboundLink.java:387)

at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.ready(HttpInboundLink.java:267)

at com.ibm.ws.tcp.channel.impl.NewConnectionInitialReadCallback.sendToDiscriminators(NewConnectionInitialReadCallback.java:214)

at com.ibm.ws.tcp.channel.impl.NewConnectionInitialReadCallback.complete(NewConnectionInitialReadCallback.java:113)

at com.ibm.ws.tcp.channel.impl.AioReadCompletionListener.futureCompleted(AioReadCompletionListener.java:165)

at com.ibm.io.async.AbstractAsyncFuture.invokeCallback(AbstractAsyncFuture.java:217)

at com.ibm.io.async.AsyncChannelFuture.fireCompletionActions(AsyncChannelFuture.java:161)

at com.ibm.io.async.AsyncFuture.completed(AsyncFuture.java:136)

at com.ibm.io.async.ResultHandler.complete(ResultHandler.java:195)

at com.ibm.io.async.ResultHandler.runEventProcessingLoop(ResultHandler.java:743)

at com.ibm.io.async.ResultHandler$2.run(ResultHandler.java:873)

at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1473)

Caused by: java.util.ConcurrentModificationException: concurrent access to HashMap attempted by Thread[WebContainer : 1,5,main]

at java.util.HashMap.onExit(HashMap.java:226)

at java.util.HashMap.transfer(HashMap.java:690)

at java.util.HashMap.resize(HashMap.java:676)

at java.util.HashMap.addEntry(HashMap.java:1049)

at java.util.HashMap.put(HashMap.java:561)

at org.directwebremoting.dwrp.DefaultConverterManager.getConverterAssignableFrom(DefaultConverterManager.java:406)

at org.directwebremoting.dwrp.DefaultConverterManager.getConverter(DefaultConverterManager.java:302)

at org.directwebremoting.dwrp.DefaultConverterManager.getConverter(DefaultConverterManager.java:234)

at org.directwebremoting.dwrp.DefaultConverterManager.convertOutbound(DefaultConverterManager.java:185)

at org.directwebremoting.convert.BasicObjectConverter.convertOutbound(BasicObjectConverter.java:189)

... 49 more

[10/23/09 7:44:12:338 CEST] 00000040 CollectionCon W org.directwebremoting.util.CommonsLoggingOutput warn Conversion error for it.omniagroup.lgi.utilita.griglia.GrigliaModelPaginato.