OpenAMF - Java Flash Remoting

I pass objects from Flash to Java and vice-versa. When sending an object
from Java to Flash, I am able to create "complex" object collections,
where there are looped references. But when sending objects from
Flash to Java, my experience has been that Flash locks up when
trying to send an object with looped references. That is,
if I have an object A which references B which references A,
and I try to send Object A to Java, Flash just gets stuck.

I've implemented a validation function in Flash, which checks
for these looped references, and prevents them from being sent.

This is a long-winded way of asking "how is are you creating
the ASObject instances with looped references?" I haven't been able
to do that. So I've never had problems deserializing such a beast!


Lorenzo Benvenuti wrote:
> Hi,
>
> I'm using openamf-1.0RC12 in a project and I think I found a couple of 
> bugs. I had some issues serializing object referenced more than once. I 
> gave a look to the openamf source code and I tried to play with the 
> AMFDeserializer class (actually I didn't spend much time with that): I 
> found that changing the index the class use to retrieve a previously 
> serialized object solves the problem:
>
> 291c291
> <         return storedObjects.get(index);
> ---
>  >         return storedObjects.get(index + 1);
>
> More than this, I discovered that the ASObject.toString() method causes 
> a stack overflow when dealing with looping references.
>
> Did anyone face similar issues?
>
> Regards,
>
> Lorenzo Benvenuti
>
>

Hi Todd,

I'm sorry to answer your email so lately: thank you for your email. 
Actually Flash doesn't lock up using circular references. I'm 
serializing and deserializing a tree whose nodes have both a "parent" 
and a "children" property, so that a parent node points to its children 
and every children points to its parent... and, if I disable openamf 
logging, everything works (probably because I patched 
AMFDeserializer.java as I said in the previous email?). A bit of 
investigation (that actually has been done by a colleague) led to the 
conclusion that is the ASObject.toString() that causes the trouble.

Thank you,

lorenzo

Todd Hivnor wrote:
> I pass objects from Flash to Java and vice-versa. When sending an object
> from Java to Flash, I am able to create "complex" object collections,
> where there are looped references. But when sending objects from
> Flash to Java, my experience has been that Flash locks up when
> trying to send an object with looped references. That is,
> if I have an object A which references B which references A,
> and I try to send Object A to Java, Flash just gets stuck.
> 
> I've implemented a validation function in Flash, which checks
> for these looped references, and prevents them from being sent.
> 
> This is a long-winded way of asking "how is are you creating
> the ASObject instances with looped references?" I haven't been able
> to do that. So I've never had problems deserializing such a beast!
> 
> 
> Lorenzo Benvenuti wrote:
>> Hi,
>>
>> I'm using openamf-1.0RC12 in a project and I think I found a couple of 
>> bugs. I had some issues serializing object referenced more than once. I 
>> gave a look to the openamf source code and I tried to play with the 
>> AMFDeserializer class (actually I didn't spend much time with that): I 
>> found that changing the index the class use to retrieve a previously 
>> serialized object solves the problem:
>>
>> 291c291
>> <         return storedObjects.get(index);
>> ---
>>  >         return storedObjects.get(index + 1);
>>
>> More than this, I discovered that the ASObject.toString() method causes 
>> a stack overflow when dealing with looping references.
>>
>> Did anyone face similar issues?
>>
>> Regards,
>>
>> Lorenzo Benvenuti
>>
>>   
> 
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-- 
Lorenzo Benvenuti

Senior Programmer

Tagetik Software
Via Farnesi, 141
55100 Lucca

Tel. (+39)058396811
Fax. (+39)058391199

lorenzobenvenuti@...
http://www.tagetik.com

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