OJB Deadlock due to reference descriptor

[SUMIT JAIN]

I am using OJB with java 1.5

I have done the following mapping

<class-descriptor class="applications.dts.models.testcase.testcasegrid.TestCaseGrid" table="dts.testcaseactions">
    <field-descriptor name="testCaseActionId" column="TestCaseActionID" primarykey="true" autoincrement="true" access="readonly" />
    <field-descriptor name="testCaseId" column="TestCaseID" />
    <field-descriptor name="affectedInsert" column="InsertFlag" />
   
    <reference-descriptor
                name="actionRef"
                class-ref="applications.dts.models.testcase.testcasegrid.testcaseactions.TCAction"
                auto-retrieve="true"
                auto-update="true"
                auto-delete="true" >
                <foreignkey field-ref="testCaseActionId"/>
    </reference-descriptor>
</class-descriptor>

<class-descriptor class="applications.dts.models.testcase.testcasegrid.testcaseactions.TCAction" table="dts.actions">
    <field-descriptor name="testCaseActionId" column="TestCaseActionID" primarykey="true" autoincrement="true" access="readonly" />
    <field-descriptor name="testCaseId" column="TestCaseID" access="readonly"/>
   
   
       <reference-descriptor
                name="testCaseGrid"
                class-ref="applications.dts.models.testcase.testcasegrid.TestCaseGrid"
                auto-retrieve="true"
                auto-update="true"
                auto-delete="true" >
                <foreignkey field-ref="testCaseActionId"/>
    </reference-descriptor>
   
</class-descriptor>


Logically it should be a deadlock but OJB does not throw any exception and is working fine.
Can anybody elaborate on this why is it working fine Or is there a mistake in my mapping?

[Janssen, Roger]

Hi,

OJB detects circular references and stops traversing if it detects an
object already instantiated, it uses a cache for that.

Roger Janssen
iBanx

-----Original Message-----
From: SUMIT JAIN [mailto:[hidden email]]
Sent: Wednesday, August 20, 2008 12:53 PM
To: [hidden email]
Subject: OJB Deadlock due to reference descriptor


I am using OJB with java 1.5

I have done the following mapping

<class-descriptor
class="applications.dts.models.testcase.testcasegrid.TestCaseGrid"
table="dts.testcaseactions">
    <field-descriptor name="testCaseActionId"
column="TestCaseActionID"
primarykey="true" autoincrement="true" access="readonly" />
    <field-descriptor name="testCaseId" column="TestCaseID" />
    <field-descriptor name="affectedInsert" column="InsertFlag" />
   
    <reference-descriptor
                name="actionRef"
       
class-ref="applications.dts.models.testcase.testcasegrid.testcaseactions
.TCAction"
                auto-retrieve="true"
                auto-update="true"
                auto-delete="true" >
                <foreignkey field-ref="testCaseActionId"/>
    </reference-descriptor>
</class-descriptor>

<class-descriptor
class="applications.dts.models.testcase.testcasegrid.testcaseactions.TCA
ction"
table="dts.actions">
    <field-descriptor name="testCaseActionId"
column="TestCaseActionID"
primarykey="true" autoincrement="true" access="readonly" />
    <field-descriptor name="testCaseId" column="TestCaseID"
access="readonly"/>
   
   
       <reference-descriptor
                name="testCaseGrid"
       
class-ref="applications.dts.models.testcase.testcasegrid.TestCaseGrid"
                auto-retrieve="true"
                auto-update="true"
                auto-delete="true" >
                <foreignkey field-ref="testCaseActionId"/>
    </reference-descriptor>
   
</class-descriptor>


Logically it should be a deadlock but OJB does not throw any exception
and is working fine.
Can anybody elaborate on this why is it working fine Or is there a
mistake in my mapping?

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1p19067031.html
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[Ilkka Priha-2]

OJB fully supports mapping of several classes to the same table. In this
case, you'll read the same data into two data structures being kind of
"reflections" of each other.

-- Ilkka

SUMIT JAIN wrote:

> I am using OJB with java 1.5
>
> I have done the following mapping
>
> <class-descriptor
> class="applications.dts.models.testcase.testcasegrid.TestCaseGrid"
> table="dts.testcaseactions">
>     <field-descriptor name="testCaseActionId" column="TestCaseActionID"
> primarykey="true" autoincrement="true" access="readonly" />
>     <field-descriptor name="testCaseId" column="TestCaseID" />
>     <field-descriptor name="affectedInsert" column="InsertFlag" />
>    
>     <reference-descriptor
> name="actionRef"
>
> class-ref="applications.dts.models.testcase.testcasegrid.testcaseactions.TCAction"
> auto-retrieve="true"
> auto-update="true"
> auto-delete="true" >
> <foreignkey field-ref="testCaseActionId"/>
>     </reference-descriptor>
> </class-descriptor>
>
> <class-descriptor
> class="applications.dts.models.testcase.testcasegrid.testcaseactions.TCAction"
> table="dts.actions">
>     <field-descriptor name="testCaseActionId" column="TestCaseActionID"
> primarykey="true" autoincrement="true" access="readonly" />
>     <field-descriptor name="testCaseId" column="TestCaseID"
> access="readonly"/>
>    
>    
>        <reference-descriptor
> name="testCaseGrid"
> class-ref="applications.dts.models.testcase.testcasegrid.TestCaseGrid"
> auto-retrieve="true"
> auto-update="true"
> auto-delete="true" >
> <foreignkey field-ref="testCaseActionId"/>
>     </reference-descriptor>
>    
> </class-descriptor>
>
>
> Logically it should be a deadlock but OJB does not throw any exception and
> is working fine.
> Can anybody elaborate on this why is it working fine Or is there a mistake
> in my mapping?
>

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[Ilkka Priha-2]

Oops, the tables are not the same, so Roger's reply gives a better answer.

-- Ilkka

Ilkka Priha wrote:

> OJB fully supports mapping of several classes to the same table. In this
> case, you'll read the same data into two data structures being kind of
> "reflections" of each other.
>
> -- Ilkka
>
> SUMIT JAIN wrote:
>> I am using OJB with java 1.5
>> I have done the following mapping
>>
>> <class-descriptor
>> class="applications.dts.models.testcase.testcasegrid.TestCaseGrid"
>> table="dts.testcaseactions">
>>         <field-descriptor name="testCaseActionId"
>> column="TestCaseActionID"
>> primarykey="true" autoincrement="true" access="readonly" />
>>         <field-descriptor name="testCaseId" column="TestCaseID" />
>>         <field-descriptor name="affectedInsert" column="InsertFlag" />
>>        
>>         <reference-descriptor         name="actionRef"    
>> class-ref="applications.dts.models.testcase.testcasegrid.testcaseactions.TCAction"
>>
>>         auto-retrieve="true"
>>         auto-update="true"
>>         auto-delete="true" >
>>         <foreignkey field-ref="testCaseActionId"/>
>>     </reference-descriptor>
>> </class-descriptor>
>>
>> <class-descriptor
>> class="applications.dts.models.testcase.testcasegrid.testcaseactions.TCAction"
>>
>> table="dts.actions">
>>         <field-descriptor name="testCaseActionId"
>> column="TestCaseActionID"
>> primarykey="true" autoincrement="true" access="readonly" />
>>         <field-descriptor name="testCaseId" column="TestCaseID"
>> access="readonly"/>
>>        
>>        
>>        <reference-descriptor         name="testCaseGrid"        
>> class-ref="applications.dts.models.testcase.testcasegrid.TestCaseGrid"
>>         auto-retrieve="true"
>>         auto-update="true"
>>         auto-delete="true" >
>>         <foreignkey field-ref="testCaseActionId"/>
>>     </reference-descriptor>
>>     </class-descriptor>
>>
>>
>> Logically it should be a deadlock but OJB does not throw any exception
>> and
>> is working fine.
>> Can anybody elaborate on this why is it working fine Or is there a
>> mistake
>> in my mapping?
>>
>
>
>
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>
> .
>

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