Hi Armin, Thanks for the tip about building the identity objects. I do agree that my problem sounds similar to OJB-63. I'm using code downloaded from the SVN OJB_1_0_RELEASE branch as of 23rd of this month. Like what is described in OJB-63 when I have org.apache.ojb.broker.accesslayer.sql.SqlGeneratorDefaultImpl.LogLevel=DEBUG I can see the correct sql being generated with the "clazz_" column in the ResultSet and hence the correct class is created. However when I turn debugging off for this class, i.e I set it to org.apache.ojb.broker.accesslayer.sql.SqlGeneratorDefaultImpl.LogLevel=WARN, the super class is generated. I tried changing the loglevel for the other jdbc access querying and object materialization class entries in the OJB-logging.properties file and only setting the loglevel to DEBUG for SqlGeneratorDefaultImpl works. This is rather strange to me. Please advice, thank you.
Regards, Chris -----Original Message----- From: Armin Waibel [mailto:[EMAIL PROTECTED] Sent: Friday, February 24, 2006 10:20 PM To: OJB Users List Subject: Re: OJB and the X-Files... :) Hi Chris, Christopher Lowe wrote: > Dear All, > > I have a simple inheritance relationship between a Special and > ActivitySpecial. I'm using proxies throughout my project with the cglib > proxy factory and indirection handler (I'm also using the broker API). I'm > performing a simple query to find an activity special as follows: > > Special special = (Special) broker.getObjectByIdentity(new Identity(new > Special(24), broker)); > log.debug("Special: " + special); > It's recommended to use the service class IdentityFactory to build the Identity and lookup persistent objects. http://db.apache.org/ojb/docu/tutorials/pb-tutorial.html#Find+object+by+prim ary+key > Now here is the catch. When I set > org.apache.ojb.broker.accesslayer.sql.SqlGeneratorDefaultImpl.LogLevel=DEBUG > in the OJB-logging.properties file everything works fine. The correct object > is materialized and when the debug statement is printed out the correct > class ActivitySpecial is present. However when I set > org.apache.ojb.broker.accesslayer.sql.SqlGeneratorDefaultImpl.LogLevel=WARN > the object that is materialized is Special. This is really weird behavior. > Does anyone have an idea why this would occur? this sounds like OJB-63 https://issues.apache.org/jira/browse/OJB-63 and was fixed for OJB 1.0.4. Do you use the latest version of OJB? regards, Armin > I've included the mappings > for the classes mentioned above as well as the entries I have for my > database repository. > > Mappings: > > <class-descriptor class="com.dm.beans.Special" table="special"> > <field-descriptor name="id" column="ID" jdbc-type="INTEGER" > primarykey="true" nullable="false" autoincrement="true"/> > <field-descriptor name="supplierId" column="SUPPLIER_ID" > jdbc-type="INTEGER" /> > <field-descriptor name="name" column="NAME" jdbc-type="VARCHAR" /> > <field-descriptor name="ackOptLock" column="ACK_OPT_LOCK" > jdbc-type="BIGINT" locking="true"/> > <reference-descriptor > name="supplier" > class-ref="com.dm.beans.suppliers.Supplier" > proxy="true" > auto-update="link" > auto-delete="none" > > > <foreignkey field-ref="supplierId"/> > </reference-descriptor> > <collection-descriptor > name="products" > > collection-class="org.apache.ojb.broker.util.collections.RemovalAwareList" > element-class-ref="com.dm.beans.Product" > auto-update="link" > auto-delete="link" > proxy="true" > indirection-table="product_special" > > > <fk-pointing-to-this-class column="SPECIAL_ID"/> > <fk-pointing-to-element-class column="PRODUCT_ID"/> > </collection-descriptor> > </class-descriptor> > > <class-descriptor class="com.dm.beans.activity.ActivitySpecial" > table="activity_special"> > <field-descriptor name="id" column="ID" jdbc-type="INTEGER" > primarykey="true" nullable="false"/> > <field-descriptor name="minPersons" column="MIN_PERSONS" > jdbc-type="INTEGER" /> > <field-descriptor name="maxPersons" column="MAX_PERSONS" > jdbc-type="INTEGER" /> > <field-descriptor name="discount" column="DISCOUNT" jdbc-type="VARCHAR" > /> > <reference-descriptor > name="super" > class-ref="com.dm.beans.Special" > > > <foreignkey field-ref="id"/> > </reference-descriptor> > </class-descriptor> > > Database Repository Settings: > > <jdbc-connection-descriptor > jcd-alias="dataSource" > default-connection="true" > platform="MySQL" > jdbc-level="3.0" > useAutoCommit="1" > eager-release="false" > batch-mode="false" > jndi-datasource-name="java:comp/env/jdbc/DestinationDB" > ignoreAutoCommitExceptions="false"> > > <!-- alternative cache implementations, see docs section "Caching" > --> > <object-cache > class="org.apache.ojb.broker.cache.ObjectCacheTwoLevelImpl"> > <!-- meaning of attributes, please see docs section "Caching" > --> > <!-- common attributes --> > <attribute attribute-name="cacheExcludes" attribute-value=""/> > > <!-- ObjectCacheTwoLevelImpl attributes --> > <attribute attribute-name="applicationCache" > attribute-value="org.apache.ojb.broker.cache.ObjectCacheOSCacheImpl"/> > <attribute attribute-name="copyStrategy" > attribute-value="org.apache.ojb.broker.cache.ObjectCacheTwoLevelImpl$CopyStr > ategyImpl"/> > <attribute attribute-name="forceProxies" > attribute-value="false"/> > > <!-- ObjectCacheDefaultImpl attributes --> > <attribute attribute-name="timeout" attribute-value="900"/> > <attribute attribute-name="autoSync" attribute-value="true"/> > <attribute attribute-name="cachingKeyType" attribute-value="0"/> > <attribute attribute-name="useSoftReferences" > attribute-value="true"/> > </object-cache> > > <!-- For more info, see section "Connection Handling" in docs --> > <connection-pool > maxActive="30" > validationQuery="select 1 from supplier_type;" > testOnBorrow="true" > testOnReturn="false" > whenExhaustedAction="0" > maxWait="10000"> > > <!-- Set fetchSize to 0 to use driver's default. --> > <attribute attribute-name="fetchSize" attribute-value="0"/> > > <!-- Attributes with name prefix "jdbc." are passed directly to > the JDBC driver. --> > <!-- Example setting (used by Oracle driver when Statement > batching is enabled) --> > <attribute attribute-name="jdbc.defaultBatchValue" > attribute-value="5"/> > > <!-- Attributes determining if ConnectionFactoryDBCPImpl > should also pool PreparedStatement. This is > programmatically disabled > when using platform=Oracle9i since Oracle statement caching > will conflict > with DBCP ObjectPool-based PreparepdStatement caching (ie > setting true > here has no effect for Oracle9i platform). --> > <attribute attribute-name="dbcp.poolPreparedStatements" > attribute-value="false"/> > <attribute attribute-name="dbcp.maxOpenPreparedStatements" > attribute-value="10"/> > <!-- Attribute determining if the Commons DBCP connection > wrapper will allow > access to the underlying concrete Connection instance from > the JDBC-driver > (normally this is not allowed, like in J2EE-containers > using wrappers). --> > <attribute > attribute-name="dbcp.accessToUnderlyingConnectionAllowed" > attribute-value="false"/> > </connection-pool> > > <!-- alternative sequence manager implementations, see "Sequence > Manager" guide --> > <sequence-manager > className="org.apache.ojb.broker.util.sequence.SequenceManagerHighLowImpl"> > <!-- attributes supported by SequenceManagerHighLowImpl, > SequenceManagerInMemoryImpl, SequenceManagerNextValImpl > please see "Sequence Manager" guide or/and javadoc of class for > more information --> > <attribute attribute-name="seq.start" attribute-value="1"/> > <attribute attribute-name="autoNaming" attribute-value="true"/> > > <!-- attributes supported by SequenceManagerHighLowImpl > please see "Sequence Manager" guide or/and javadoc of classes > for more information --> > <attribute attribute-name="grabSize" attribute-value="1"/> > > <!-- optional attributes supported by SequenceManagerNextValImpl > (support depends > on the used database), please see "Sequence Manager" guide > or/and javadoc of > classes for more information --> > <!-- attribute attribute-name="seq.as" > attribute-value="INTEGER"/ --> > <!-- attribute attribute-name="seq.incrementBy" > attribute-value="1"/ --> > <!-- attribute attribute-name="seq.maxValue" > attribute-value="999999999999999999999999999"/ --> > <!-- attribute attribute-name="seq.minValue" > attribute-value="1"/ --> > <!-- attribute attribute-name="seq.cycle" > attribute-value="false"/ --> > <!-- attribute attribute-name="seq.cache" attribute-value="20"/ > --> > <!-- attribute attribute-name="seq.order" > attribute-value="false"/ --> > > </sequence-manager> > > Regards, > Chris > > --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
