Re: JSON Error - Hibernate Entities

2011-02-14 Thread Maurizio Cucchiara 
Your Item class is a simple POJO [1], isn't it?
 Have you tried to use a DTO [2] object and see what happens?

[1] http://en.wikipedia.org/wiki/Plain_Old_Java_Object
[2] http://martinfowler.com/eaaCatalog/dataTransferObject.html
On 14 February 2011 08:39, CRANFORD, CHRIS chris.cranf...@setech.com wrote:

 Here is the portion from the struts configuration:
 struts-warranty.xml

 action
  name=ajaxWarrantyItemsAcList
  class=com.setech.dw.warranty.web.WarrantyAssignmentItemAjaxAction
  result name=success type=json
    param name=rootitemsList/param/result
  /result
 /action

 The ajax action class looks like this:

 public class WarrantyAssignmentItemAjaxAction extends BaseAction
 {
  private ListItem itemsList;

  public ListItem getItemsList() {
    Return itemsList;
  }

  // other stuff removed from breavity
 }

 I always map the root object to the property I want returned for each
 AJAX call because I have noticed that JSON complains should it try to
 serialize things such as my service objects and so on.

 I did notice that because a few objects within the graph have cyclic
 redundancy that JSONWriter logged a few messages about that before it
 finally puked so I'm not sure if because my object graph has these
 circular references if that is creating problems for it or not.

 -Original Message-
 From: Maurizio Cucchiara [mailto:maurizio.cucchi...@gmail.com]
 Sent: Monday, February 14, 2011 1:12 AM
 To: Struts Users Mailing List
 Subject: Re: JSON Error - Hibernate Entities

 Could you post your struts.xml and the action which you're trying to
 serialize?
 I'm pretty sure that your action class contains a reference to a
 connection
 object and the json plugin is trying to serialize it.
 If I'm right you could simply change your root parameter via action
 configuration inside the struts.xml file.

 Maurizio Cucchiara

 Il giorno 14/feb/2011 07.19, CRANFORD, CHRIS
 chris.cranf...@setech.com
 ha scritto:
 I am trying to return a list of hibernate entities to my AJAX call;
 however, I get the following error message when JSONWriter tries to
 serialize the objects.  Can anyone explain why I am getting this error
 and if there is something I can do to avoid it so I can pass my
 objects
 back via a JSON call?

 java.lang.IllegalAccessException: Class
 org.apache.struts2.json.JSONWriter can not access a member of class

 org.apache.tomcat.dbcp.dbcp.PoolingDataSource$PoolGuardConnectionWrappe
 r
 with modifiers public

 Chris


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Maurizio Cucchiara

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RE: JSON Error - Hibernate Entities

2011-02-14 Thread CRANFORD, CHRIS 
I eventually decided to write a DTO wrapper that took my POJO as a constructor 
argument and extracted the fields I wanted to pass instead of trying to 
serialize the entire object and that seemed to work.  It just appears that the 
amount of information within the POJO was creating issues for JSON to serialize 
it; however I cannot isolate exactly what is the problem in the POJO.  All of 
the properties in the POJO are serializable :=/.

 -Original Message-
 From: Maurizio Cucchiara [mailto:maurizio.cucchi...@gmail.com]
 Sent: Monday, February 14, 2011 2:40 AM
 To: Struts Users Mailing List
 Subject: Re: JSON Error - Hibernate Entities
 
 Your Item class is a simple POJO [1], isn't it?
  Have you tried to use a DTO [2] object and see what happens?
 
 [1] http://en.wikipedia.org/wiki/Plain_Old_Java_Object
 [2] http://martinfowler.com/eaaCatalog/dataTransferObject.html
 On 14 February 2011 08:39, CRANFORD, CHRIS chris.cranf...@setech.com
 wrote:
 
  Here is the portion from the struts configuration:
  struts-warranty.xml
 
  action
   name=ajaxWarrantyItemsAcList
   class=com.setech.dw.warranty.web.WarrantyAssignmentItemAjaxAction
   result name=success type=json
     param name=rootitemsList/param/result
   /result
  /action
 
  The ajax action class looks like this:
 
  public class WarrantyAssignmentItemAjaxAction extends BaseAction
  {
   private ListItem itemsList;
 
   public ListItem getItemsList() {
     Return itemsList;
   }
 
   // other stuff removed from breavity
  }
 
  I always map the root object to the property I want returned for each
  AJAX call because I have noticed that JSON complains should it try to
  serialize things such as my service objects and so on.
 
  I did notice that because a few objects within the graph have cyclic
  redundancy that JSONWriter logged a few messages about that before it
  finally puked so I'm not sure if because my object graph has these
  circular references if that is creating problems for it or not.
 
  -Original Message-
  From: Maurizio Cucchiara [mailto:maurizio.cucchi...@gmail.com]
  Sent: Monday, February 14, 2011 1:12 AM
  To: Struts Users Mailing List
  Subject: Re: JSON Error - Hibernate Entities
 
  Could you post your struts.xml and the action which you're trying to
  serialize?
  I'm pretty sure that your action class contains a reference to a
  connection
  object and the json plugin is trying to serialize it.
  If I'm right you could simply change your root parameter via action
  configuration inside the struts.xml file.
 
  Maurizio Cucchiara
 
  Il giorno 14/feb/2011 07.19, CRANFORD, CHRIS
  chris.cranf...@setech.com
  ha scritto:
  I am trying to return a list of hibernate entities to my AJAX call;
  however, I get the following error message when JSONWriter tries to
  serialize the objects.  Can anyone explain why I am getting this
 error
  and if there is something I can do to avoid it so I can pass my
  objects
  back via a JSON call?
 
  java.lang.IllegalAccessException: Class
  org.apache.struts2.json.JSONWriter can not access a member of class
 
 
 org.apache.tomcat.dbcp.dbcp.PoolingDataSource$PoolGuardConnectionWrappe
  r
  with modifiers public
 
  Chris
 
 
  
 -
  To unsubscribe, e-mail: user-unsubscr...@struts.apache.org
  For additional commands, e-mail: user-h...@struts.apache.org
 
 
  -
  To unsubscribe, e-mail: user-unsubscr...@struts.apache.org
  For additional commands, e-mail: user-h...@struts.apache.org
 
 
 
 
 
 --
 Maurizio Cucchiara
 
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Re: RE: JSON Error - Hibernate Entities

2011-02-14 Thread Maurizio Cucchiara 
My guess is that the json plugin was navigating the entire graph object,
trying to serialize the entire java world.

Maurizio Cucchiara

Il giorno 14/feb/2011 14.12, CRANFORD, CHRIS chris.cranf...@setech.com
ha scritto:
 I eventually decided to write a DTO wrapper that took my POJO as a
constructor argument and extracted the fields I wanted to pass instead of
trying to serialize the entire object and that seemed to work. It just
appears that the amount of information within the POJO was creating issues
for JSON to serialize it; however I cannot isolate exactly what is the
problem in the POJO. All of the properties in the POJO are serializable :=/.

 -Original Message-
 From: Maurizio Cucchiara [mailto:maurizio.cucchi...@gmail.com]
 Sent: Monday, February 14, 2011 2:40 AM
 To: Struts Users Mailing List
 Subject: Re: JSON Error - Hibernate Entities

 Your Item class is a simple POJO [1], isn't it?
 Have you tried to use a DTO [2] object and see what happens?

 [1] http://en.wikipedia.org/wiki/Plain_Old_Java_Object
 [2] http://martinfowler.com/eaaCatalog/dataTransferObject.html
 On 14 February 2011 08:39, CRANFORD, CHRIS chris.cranf...@setech.com
 wrote:
 
  Here is the portion from the struts configuration:
  struts-warranty.xml
 
  action
   name=ajaxWarrantyItemsAcList
   class=com.setech.dw.warranty.web.WarrantyAssignmentItemAjaxAction
   result name=success type=json
 param name=rootitemsList/param/result
   /result
  /action
 
  The ajax action class looks like this:
 
  public class WarrantyAssignmentItemAjaxAction extends BaseAction
  {
   private ListItem itemsList;
 
   public ListItem getItemsList() {
 Return itemsList;
   }
 
   // other stuff removed from breavity
  }
 
  I always map the root object to the property I want returned for each
  AJAX call because I have noticed that JSON complains should it try to
  serialize things such as my service objects and so on.
 
  I did notice that because a few objects within the graph have cyclic
  redundancy that JSONWriter logged a few messages about that before it
  finally puked so I'm not sure if because my object graph has these
  circular references if that is creating problems for it or not.
 
  -Original Message-
  From: Maurizio Cucchiara [mailto:maurizio.cucchi...@gmail.com]
  Sent: Monday, February 14, 2011 1:12 AM
  To: Struts Users Mailing List
  Subject: Re: JSON Error - Hibernate Entities
 
  Could you post your struts.xml and the action which you're trying to
  serialize?
  I'm pretty sure that your action class contains a reference to a
  connection
  object and the json plugin is trying to serialize it.
  If I'm right you could simply change your root parameter via action
  configuration inside the struts.xml file.
 
  Maurizio Cucchiara
 
  Il giorno 14/feb/2011 07.19, CRANFORD, CHRIS
  chris.cranf...@setech.com
  ha scritto:
  I am trying to return a list of hibernate entities to my AJAX call;
  however, I get the following error message when JSONWriter tries to
  serialize the objects.  Can anyone explain why I am getting this
 error
  and if there is something I can do to avoid it so I can pass my
  objects
  back via a JSON call?
 
  java.lang.IllegalAccessException: Class
  org.apache.struts2.json.JSONWriter can not access a member of class
 
 
 org.apache.tomcat.dbcp.dbcp.PoolingDataSource$PoolGuardConnectionWrappe
  r
  with modifiers public
 
  Chris
 
 
  
 -
  To unsubscribe, e-mail: user-unsubscr...@struts.apache.org
  For additional commands, e-mail: user-h...@struts.apache.org
 
 
  -
  To unsubscribe, e-mail: user-unsubscr...@struts.apache.org
  For additional commands, e-mail: user-h...@struts.apache.org
 
 



 --
 Maurizio Cucchiara

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Re: JSON Error - Hibernate Entities

2011-02-13 Thread Maurizio Cucchiara 
Could you post your struts.xml and the action which you're trying to
serialize?
I'm pretty sure that your action class contains a reference to a connection
object and the json plugin is trying to serialize it.
If I'm right you could simply change your root parameter via action
configuration inside the struts.xml file.

Maurizio Cucchiara

Il giorno 14/feb/2011 07.19, CRANFORD, CHRIS chris.cranf...@setech.com
ha scritto:
I am trying to return a list of hibernate entities to my AJAX call;
however, I get the following error message when JSONWriter tries to
serialize the objects.  Can anyone explain why I am getting this error
and if there is something I can do to avoid it so I can pass my objects
back via a JSON call?

java.lang.IllegalAccessException: Class
org.apache.struts2.json.JSONWriter can not access a member of class
org.apache.tomcat.dbcp.dbcp.PoolingDataSource$PoolGuardConnectionWrapper
with modifiers public

Chris


-
To unsubscribe, e-mail: user-unsubscr...@struts.apache.org
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RE: JSON Error - Hibernate Entities

2011-02-13 Thread CRANFORD, CHRIS 

Here is the portion from the struts configuration:
struts-warranty.xml

action 
  name=ajaxWarrantyItemsAcList
  class=com.setech.dw.warranty.web.WarrantyAssignmentItemAjaxAction
  result name=success type=json
param name=rootitemsList/param/result
  /result
/action

The ajax action class looks like this:

public class WarrantyAssignmentItemAjaxAction extends BaseAction
{
  private ListItem itemsList;
  
  public ListItem getItemsList() {
Return itemsList;
  }

  // other stuff removed from breavity
}

I always map the root object to the property I want returned for each
AJAX call because I have noticed that JSON complains should it try to
serialize things such as my service objects and so on. 

I did notice that because a few objects within the graph have cyclic
redundancy that JSONWriter logged a few messages about that before it
finally puked so I'm not sure if because my object graph has these
circular references if that is creating problems for it or not.

 -Original Message-
 From: Maurizio Cucchiara [mailto:maurizio.cucchi...@gmail.com]
 Sent: Monday, February 14, 2011 1:12 AM
 To: Struts Users Mailing List
 Subject: Re: JSON Error - Hibernate Entities
 
 Could you post your struts.xml and the action which you're trying to
 serialize?
 I'm pretty sure that your action class contains a reference to a
 connection
 object and the json plugin is trying to serialize it.
 If I'm right you could simply change your root parameter via action
 configuration inside the struts.xml file.
 
 Maurizio Cucchiara
 
 Il giorno 14/feb/2011 07.19, CRANFORD, CHRIS
 chris.cranf...@setech.com
 ha scritto:
 I am trying to return a list of hibernate entities to my AJAX call;
 however, I get the following error message when JSONWriter tries to
 serialize the objects.  Can anyone explain why I am getting this error
 and if there is something I can do to avoid it so I can pass my
objects
 back via a JSON call?
 
 java.lang.IllegalAccessException: Class
 org.apache.struts2.json.JSONWriter can not access a member of class

org.apache.tomcat.dbcp.dbcp.PoolingDataSource$PoolGuardConnectionWrappe
 r
 with modifiers public
 
 Chris
 
 
 -
 To unsubscribe, e-mail: user-unsubscr...@struts.apache.org
 For additional commands, e-mail: user-h...@struts.apache.org


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