Hi @all, i have a Model of 3 Classes:
InstanceItem, EntityClass and Parameter. an InstanceItem has a reference to its parent InstanceItem and a Map to its EntityClasses. An EntityClass has a Reference to its InstanceItem and to a Collection of Parameters. Parameters have no references to anything, they just have some values. My Problem: The InstanceItem Reference to its parent gets lost somehow. I have a breakpoint that stops when i load an InstanceItem without a parent (i don't load the head elements). I also have a breakpoint when the parent is accessed and it is null. for checking that the programm does not change the InstanceItem, i added Break points to the accessors for the parent InstanceItem and a breakpoint for a field change to null. I only hit the second breakpoint always... so somewhere the parent reference disappears. maybe there is too much data in the openJPA cache so that it throws away something? i don't know what could happen there. i add my mapping.xml file and my persistence.xml if you need more info, please don't hesitate to ask. would be nice to get that problem solved quickly. MAPPING: <?xml version="1.0" encoding="Cp1252" ?> <entity-mappings xmlns="http://java.sun.com/xml/ns/persistence/orm"; xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"; xsi:schemaLocation="http://java.sun.com/xml/ns/persistence/orm http://java.sun.com/xml/ns/persistence/orm_1_0.xsd"; version="1.0"> <persistence-unit-metadata> <xml-mapping-metadata-complete/> <!--<persistence-unit-defaults> <schema>yp</schema> </persistence-unit-defaults>--> </persistence-unit-metadata> <mapped-superclass class="com.adva.yp.api.model.YPDatabaseItem" metadata-complete="true"><!-- <entity-listeners> <entity-listener class="com.adva.yp.api.data_accessor.database_accessor.entity_listener.YPDatabaseItemEntityListener"/> </entity-listeners>--> <attributes> <id name="id"> <generated-value strategy="IDENTITY"/> </id> <version name="dbVer"/> <transient name="logger"/> </attributes> </mapped-superclass> <!-- YPInstanceItem <-> YP_INSTANCE --> <entity class="com.adva.yp.api.model.YPInstanceItem"> <table name="yp_instance"> <!-- schema="yp"> --> <unique-constraint> <column-name>YP_INSTANCE_UNIQUE_ID</column-name> </unique-constraint> </table> <!-- Primary Key --> <attribute-override name="id"> <column name="YP_INSTANCE_ID"/> </attribute-override> <attributes> <!-- Basic mappings --> <basic name="uniqueId"><column name="YP_INSTANCE_UNIQUE_ID" /></basic> <basic name="name"><column name="YP_INSTANCE_NAME"/></basic> <basic name="instanceKey"><column name="YP_INSTANCE_KEY"/></basic> <basic name="categoryTypeId"><column name="YP_CATEGORY_TYPE_ID"/></basic> <basic name="instanceTypeId"><column name="YP_INSTANCE_TYPE_ID"/></basic> <basic name="description"><column name="YP_INSTANCE_DESCRIPTION" column-definition="VARCHAR(1000)"/></basic> <basic name="resolved"><column name="YP_INSTANCE_RESOLVED"/></basic> <basic name="hidden"><column name="YP_INSTANCE_HIDDEN"/></basic> <!-- Hierarchy Mapping to parent and child instance items --> <many-to-one name="instanceParent" target-entity="com.adva.yp.api.model.YPInstanceItem" fetch="EAGER"> <!--optional="true" fetch="LAZY">--> <join-column name="YP_INSTANCE_ID_PARENT"/> <cascade> <cascade-persist/> <cascade-merge/> <cascade-refresh/> </cascade> </many-to-one> <!-- All Entities --> <one-to-many name="entities" target-entity="com.adva.yp.api.model.YPEntityClass" mapped-by="referencedInstanceItem" fetch="LAZY"> <map-key name="name" /> <cascade> <cascade-all/> </cascade> </one-to-many> <!-- <one-to-many name="childInstanceItems" target-entity="com.adva.yp.api.model.YPInstanceItem" fetch="LAZY" mapped-by="instanceParent"> <cascade> <cascade-remove/> </cascade> </one-to-many> --> <!--<transient name="logger" />--> </attributes> </entity> <!-- YPEntityClass <-> YP_ENTITY --> <entity class="com.adva.yp.api.model.YPEntityClass" metadata-complete="true"> <table name="yp_entity_fast"> <!-- schema="yp"> --> <unique-constraint> <column-name>YP_ENTITY_TYPE_ID</column-name> <column-name>YP_INSTANCE_ID</column-name> </unique-constraint> </table> <!-- Primary Key --> <attribute-override name="id"> <column name="YP_ENTITY_ID"/> </attribute-override> <attributes> <!-- Basic mappings --> <basic name="name"><column name="YP_ENTITY_NAME"/></basic> <basic name="entityClassTypeId"><column name="YP_ENTITY_TYPE_ID"/></basic> <!--<basic name="referencedInstanceItemId"><column name="YP_INSTANCE_ID"/></basic>--> <!-- referenced YPInstanceItem --> <many-to-one name="referencedInstanceItem" target-entity="com.adva.yp.api.model.YPInstanceItem" optional="false"> <join-column name="YP_INSTANCE_ID" nullable="false"/> <cascade> <cascade-persist/> <cascade-merge/> <cascade-refresh/> </cascade> </many-to-one> <!-- All Parameters --> <many-to-many name="params" target-entity="com.adva.yp.api.model.YPParameter" fetch="LAZY"> <join-table name="yp_entity_parameter_fast"> <join-column name="YP_ENTITY_ID"/> <inverse-join-column name="YP_PARAMETER_ID"/> <unique-constraint> <column-name>YP_ENTITY_ID</column-name> <column-name>YP_PARAMETER_ID</column-name> </unique-constraint><!-- --> </join-table> <cascade> <cascade-persist/> <cascade-merge/> <cascade-refresh/> </cascade> </many-to-many> <!--<transient name="logger" />--> </attributes> </entity> <!-- YPParameter <-> YP_PARAMETER --> <entity class="com.adva.yp.api.model.YPParameter"> <table name="yp_parameter"> <!-- schema="yp"> --> <unique-constraint> <column-name>YP_PARAMETER_TYPE_ID</column-name> <column-name>YP_PARAMETER_VALUE_STRING</column-name> </unique-constraint> </table> <!-- Primary Key --> <attribute-override name="id"> <column name="YP_PARAMETER_ID"/> </attribute-override> <attributes> <basic name="parameterTypeId"><column name="YP_PARAMETER_TYPE_ID"/></basic> <basic name="parameterName"><column name="YP_PARAMETER_NAME"/></basic> <basic name="doubleValue"><column name="YP_PARAMETER_VALUE_DOUBLE"/></basic> <basic name="longValue"><column name="YP_PARAMETER_VALUE_LONG"/></basic> <basic name="stringValue"><column name="YP_PARAMETER_VALUE_STRING"/></basic> <basic name="rangeMin"><column name="YP_PARAMETER_VALUE_RMIN"/></basic> <basic name="rangeMax"><column name="YP_PARAMETER_VALUE_RMAX"/></basic> <!--<transient name="logger" /> --> </attributes> </entity> <entity class="com.adva.yp.api.data_accessor.database_accessor.util.YPParameterRankingTupel"> <table name="yp_parameter_ranking"/> <attributes> <id name="id"><column name="PRIM_KEY"/><generated-value strategy="IDENTITY"/></id> <basic name="type"><column name="YP_PARAMETER_NAME"/></basic> <!--nsertable="false" updatable="false" nullable="false"/></basic>--> <basic name="rankingValue"><column name="YP_PARAMETER_AVG_HIT" insertable="false" updatable="false" nullable="false"/></basic> </attributes> </entity> <entity class="com.adva.yp.api.data_cache.YPCacheObject"> <table name="yp_cache"/> <attribute-override name="id"> <column name="YP_CACHE_PK"/> </attribute-override> <attributes> <basic name="headKey"><column name="YP_CACHE_HEAD"/></basic> <basic name="positiveKey"><column name="YP_CACHE_POS"/></basic> <basic name="negativeKey"><column name="YP_CACHE_NEG"/></basic> <basic name="hitCount"><column name="YP_CACHE_HITCOUNT"/></basic> <basic name="instanceItemUniqueId"><column name="YP_INSTANCE_UNIQUE_ID"/></basic> <one-to-one name="instanceItem" target-entity="com.adva.yp.api.model.YPInstanceItem" fetch="EAGER"> <join-column name="YP_INSTANCE_ID"/> <cascade> <!--<cascade-persist/> <cascade-merge/>--> <cascade-refresh/> </cascade> </one-to-one> </attributes> </entity> </entity-mappings> PERSISTENCE (Connection String is set by Properties): <?xml version="1.0"?> <persistence xmlns="http://java.sun.com/xml/ns/persistence"; version="1.0"> <persistence-unit name="FastAccessYPAPI"> <provider>org.apache.openjpa.persistence.PersistenceProviderImpl</provider> <mapping-file>com/adva/yp/api/data_accessor/database_accessor/orm/orm_mysql_fast_access.xml</mapping-file> <class>com.adva.yp.api.model.YPDatabaseItem</class> <class>com.adva.yp.api.model.YPInstanceItem</class> <class>com.adva.yp.api.model.YPParameter</class> <class>com.adva.yp.api.model.YPEntityClass</class> <properties> <!--Apache OpenJPA doesn't have a built-in connection pool. Apache DB connection pooling services are used. --> <property name="openjpa.ConnectionDriverName" value="org.apache.commons.dbcp.BasicDataSource"/> <!--The connection properties (URL, user etc) are set internally./--> <property name="openjpa.Log" value="DefaultLevel=WARN"/> <property name="openjpa.MetaDataFactory" value="jpa"/> <property name="openjpa.jdbc.SchemaFactory" value="native(ForeignKeys=true)"/> <property name="openjpa.IgnoreChanges" value="true"/> <property name="openjpa.Multithreaded" value="true"/> <property name="openjpa.NontransactionalRead" value="true"/> <property name="openjpa.NontransactionalWrite" value="false"/> <property name="openjpa.Optimistic" value="true"/> <property name="openjpa.jdbc.DBDictionary" value="TableType=innodb"/> </properties> </persistence-unit> </persistence> It runs on MySQL 5.0. -- View this message in context: http://openjpa.208410.n2.nabble.com/Parent-reference-is-loaded-but-disappears-while-working-with-the-object-tp5728025p5728025.html Sent from the OpenJPA Users mailing list archive at Nabble.com.
