Hi!
Does anyone use the PersistentLockMapImpl? I get a problem when I use
PersistentLockMapImpl for lock map.
I have two classes A and B. Their relation is non-decomposed association ,and their
collection-descriptor be set proxy="true" each other.
Like as:
<class-descriptor class="A" table="A">
<field-descriptor name="OID" column="OID" jdbc-type="CHAR" primarykey="true"
autoincrement="true" nullable="false"/>
<field-descriptor name="currentState" column="currentState" jdbc-type="INTEGER"
nullable="false"/>
<collection-descriptor name="Bs"
collection-class="org.apache.ojb.odmg.collections.DListImpl" element-class-ref="B"
indirection-table="A_B" proxy="true">
<fk-pointing-to-this-class column="AOID"/>
<fk-pointing-to-element-class column="BOID"/>
</collection-descriptor>
</class-descriptor>
<class-descriptor class="B" table="B">
<field-descriptor name="OID" column="OID" jdbc-type="CHAR" primarykey="true"
autoincrement="true" nullable="false"/>
<field-descriptor name="currentState" column="currentState" jdbc-type="INTEGER"
nullable="false"/>
<collection-descriptor name="As"
collection-class="org.apache.ojb.odmg.collections.DListImpl" element-class-ref="A"
indirection-table="A_B" proxy="true">
<fk-pointing-to-this-class column="BOID"/>
<fk-pointing-to-element-class column="AOID"/>
</collection-descriptor>
</class-descriptor>
In my case, I use ODMG API to operate object persistence. At the same transaction , I
first select a object of class A then select a
object of class B and set a new value to B's currentState property. After the
transaction finishing, the value of B's currentState did
not be changed in database. I confirm it work if I set
LockMapClass=org.apache.ojb.odmg.locking.InMemoryLockMapImpl in the OJB.properties
file.Because our application has multi OJB instance at the same time, I must set
LockMapClass=org.apache.ojb.odmg.locking.PersistentLockMapImpl.
The lock properties are
LockManagerClass=org.apache.ojb.odmg.locking.LockManagerDefaultImpl
LockMapClass=org.apache.ojb.odmg.locking.PersistentLockMapImpl
LockTimeout=60000
ImplicitLocking=true
LockAssociations=WRITE and
ObjectCacheClass=org.apache.ojb.broker.cache.ObjectCacheEmptyImpl
In my program , I new a Transaction.READ type transaction to query A and B.
I try to query B first before query A, then set a new value to B's currentState
property. The OJB ODMG can update field of B success even
LockMapClass=org.apache.ojb.odmg.locking.PersistentLockMapImpl.
Does anybody know why it is or tell me how to solve this problem?
