Fast Object Database for Java - with JPA/JDO support

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javax.persistence.OptimisticLockException

, if one is active, will be marked for rollback. Since: JPA 1.0 See Also: EntityManager.find(Class, Object, LockModeType) EntityManager.find(Class, Object, LockModeType, java.util.Map) EntityManager
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javax.jdo.PersistenceManagerFactory

. This is used to find the object-datastore mapping file(s). Returns: the Mapping setting. Since: JDO 1.0 ... for this factory. This is used to find the object-datastore mapping file(s). Parameters: mapping - the Mapping
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Page cache File handling produced an java.io.IOException: Negative seek offset

we get following exception when we execute a find() in a scenario, we can not readjust ... \pages11.dat' (error 117)     at com.objectdb.jpa.EMImpl.find(EMImpl.java:630)     at com.objectdb.jpa.EMImpl.find(EMImpl.java:545)     at com.btc.ep.base.dal.internal.services
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getInstance(cls)

Static Method javax.jdo.spi.I18NHelper I18NHelper getInstance( Class cls ) An instance bound to a bundle. This method figures out the bundle name for the class object's package and uses the class' class loader to find the bundle. Note, the specified class object must not be null. Parameters: cls
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getObjectById(oid, validate)

Method javax.jdo.PersistenceManager Object getObjectById( Object oid, boolean validate ) This method locates a persistent instance in the cache of instances managed by this PersistenceManager. The getObjectById method attempts to find an instance in the cache with the specified JDO identity
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javax.persistence.CacheRetrieveMode

property to specify the behavior when data is retrieved by the find methods and by queries. Since: JPA 2
1

least(x)

Method javax.persistence.criteria.CriteriaBuilder Expression least( Expression x ) Create an aggregate expression for finding the least of the values (strings, dates, etc). Parameters: x - expression representing input value to least operation Returns: least expression Since: JPA 2.0
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getMapping()

Method javax.jdo.PersistenceManagerFactory String getMapping() Get the Mapping setting for this factory. This is used to find the object-datastore mapping file(s). Returns: the Mapping setting. Since: JDO 1.0
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construct(className, keyString)

Static Method javax.jdo.spi.JDOImplHelper Object construct( String className, String keyString ) Construct an instance of the parameter class, using the keyString as an argument to the constructor. If the class has a StringConstructor instance registered, use it. If not, try to find a constructor
1

setMapping(mapping)

Method javax.jdo.PersistenceManagerFactory void setMapping( String mapping ) Set the Mapping setting for this factory. This is used to find the object-datastore mapping file(s). Parameters: mapping - the Mapping setting. Since: JDO 1.0

Getting Started

ObjectDB is very easy to use. Follow the Getting Started Tutorial and the Quick Tour manual chapter and in minutes you may be able to write and run first Java programs against ObjectDB.

Prior knowledge or experience in database programming (SQL, JDBC, ORM, JPA, etc.) is not required, but some background in using the Java language is essential.

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