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createNamedQuery(name, resultClass)

specified by the resultClass argument. Parameters: name - the name of a query defined in metadata
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createNamedQuery(name)

Method javax.persistence.EntityManager Query createNamedQuery( String name ) Create an instance of Query for executing a named query (in the Java Persistence query language or in native SQL). Parameters: name - the name of a query defined in metadata Returns: the new query instance Throws
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javax.persistence.ColumnResult

javax.persistence Annotation ColumnResult Target: References name of a column in the SELECT clause of a SQL query - i.e., column alias, if applicable. Scalar result types can be included in the query result by specifying this annotation in the metadata. Example: Query q = em.createNativeQuery
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NamedNativeQuery.resultSetMapping

Annotation Element javax.persistence.NamedNativeQuery String resultSetMapping The name of a SqlResultSetMapping, as defined in metadata. Default value: "" Since: JPA 1.0
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Exception makes the system unusable for several minutes

.hummingbird.API.executeEndAction(API.java:1874) at com.agile.hummingbird.API.handleAction(API.java:1614) at com.agile.hummingbird.API.directRequest(API.java:1089) at com.agile.hummingbird.API.handleWebSocketRequest(API.java:890) at com.agile.hummingbird.WebSocketServerListener
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stress test -> com.objectdb.o.InternalException: null

I am running a stress test with 2 users, each making a request to the JSON API (which uses as storage ObjectDB) each 50 milliseconds. An API call might have between 1-4 db calls ... /fitbird/control/p2/WorkoutPlanC.java) at com.fitbird.boundary.api.util.PlanAccessVerifier.<init
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registerClass(event)

Method javax.jdo.spi.RegisterClassListener void registerClass( RegisterClassEvent event ) This method gets called when a persistence-capable class is registered. Parameters: event - a RegisterClassEvent instance describing the registered class plus metadata. Since: JDO 1.0
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javax.jdo.spi.RegisterClassListener

-capable class is registered. Parameters: event - a RegisterClassEvent instance describing the registered class plus metadata. Since: JDO 1.0
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registerClass(pcClass, fieldNames, fieldTypes, fieldFlags, persistenceCapableSuperclass, pc)

Static Method javax.jdo.spi.JDOImplHelper void registerClass( Class pcClass, String[] fieldNames, Class[] fieldTypes, byte[] fieldFlags, Class persistenceCapableSuperclass, PersistenceCapable pc ) Register metadata by class. The registration will be done in the class named JDOImplHelper loaded by
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javax.jdo.datastore.Sequence

javax.jdo.datastore Interface Sequence Implementations of this interface can be used to obtain sequences. The behavior with regard to the transaction and rollover behavior are defined in the metadata. Since: JDO 2.0 void allocate(int additional) Provides a hint to the implementation

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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