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How do I fix this error/warning that Netbeans gives me regarding no persistence unit ?   ThreaT Ashton Hogan ObjectDB itself does not require a persistence unit , but NetBeans produces this warning because a persistence unit is required by JPA. Although your application should work

, because it seems that the persistence unit is unknown. Try repeating the tutorial steps one by one carefully or download ... the  unit name to the DAO class: (if I remove it then the exception thrown is the same with null for the Unit Name)   Thanks, Allen   ceylonsoft Allen T. Arumainayagam Maybe

persistent attribute of an entity belonging to the persistence unit and to an open persistence context ... belonging to the persistence unit . PersistenceException - if the entity is not associated ... Jakarta Persistence (JPA) Method in jakarta. persistence .PersistenceUnitUtil void load (  

attribute of an entity belonging to the persistence unit and to an open persistence context ... to the persistence unit . PersistenceException - if the entity is not associated with an open ... Jakarta Persistence (JPA) Method in jakarta. persistence .PersistenceUnitUtil void load (  

Jakarta Persistence (JPA) Method in jakarta. persistence .PersistenceUnitUtil void load (    Object entity ) Load the persistent state of an entity belonging to the persistence unit ... to the persistence unit . PersistenceException - if the entity is not associated with an open persistence context

Jakarta Persistence (JPA) Method in jakarta. persistence .PersistenceContext String unitName (Optional) The name of the persistence unit as defined in the persistence .xml file. If the unitName element is specified, the persistence unit for the entity manager that is accessible in JNDI

Jakarta Persistence (JPA) Method in jakarta. persistence .PersistenceUnit String unitName (Optional) The name of the persistence unit as defined in the persistence .xml file. If specified, the persistence unit for the entity manager factory that is accessible in JNDI must have the same name. Default: "" Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta. persistence .PersistenceConfiguration String name() The name of the persistence unit , which may be used by the persistence provider for logging and error reporting. Returns: the name of the persistence unit .. Since: Jakarta Persistence (JPA) 1.0

type of the persistence unit is JTA, and there is a JTA transaction already associated ... . Otherwise, if the transaction type of the persistence unit is resource-local, or if there is no JTA ... Jakarta Persistence (JPA) Method in jakarta. persistence .EntityManagerFactory void runInTransaction

of the persistence unit is JTA, and there is a JTA transaction already associated with the caller ... . Otherwise, if the transaction type of the persistence unit is resource-local, or if there is no JTA transaction ... Jakarta Persistence (JPA) Method in jakarta. persistence .EntityManagerFactory R callInTransaction

Jakarta Persistence (JPA) Method in jakarta. persistence .EntityManager T find (    ... type. If the entity instance is contained in the persistence context, it is returned from there. If the entity is found within the persistence context and the lock mode type is pessimistic

Jakarta Persistence (JPA) Method in jakarta. persistence .EntityManager T find (    Class ... it with respect to the specified lock type. If the entity instance is contained in the persistence context, it is returned from there. If the entity is found within the persistence context and the lock mode type

persistent attribute of an entity belonging to the persistence unit . Parameters: attributeName - name ... Jakarta Persistence (JPA) Method in jakarta. persistence .PersistenceUnitUtil boolean isLoaded ... Returns: false if entity's state has not been loaded or if the attribute state has not been loaded, else true. Since: Jakarta Persistence (JPA) 1.0

persistent attribute of an entity belonging to the persistence unit . Parameters: attribute - attribute ... Jakarta Persistence (JPA) Method in jakarta. persistence .PersistenceUnitUtil boolean isLoaded ... if entity's state has not been loaded or if the attribute state has not been loaded, else true. Since: Jakarta Persistence (JPA) 3.2

.createEntityManagerFactory . Parameters: name - the name of the persistence unit , which may be used by the persistence provider for logging and error reporting Since: Jakarta Persistence (JPA) 1.0 ... Jakarta Persistence (JPA) Constructor in jakarta. persistence .PersistenceConfiguration

Jakarta Persistence (JPA) Method in jakarta. persistence .SchemaManager void validate() Validate that the database objects mapped by entities belonging to the persistence unit have the expected definitions. The persistence provider is not required to perform any specific validation, so the semantics

Jakarta Persistence (JPA) Method in jakarta. persistence .PersistenceConfiguration PersistenceConfiguration property (    String name ,    Object value ) Set a property of this persistence unit . Parameters: name - the property name value - the property value Returns: this configuration. Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta. persistence .PersistenceConfiguration PersistenceConfiguration properties (    Map properties ) Set multiple properties of this persistence unit . Parameters: properties - the properties Returns: this configuration. Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta. persistence .PersistenceConfiguration PersistenceConfiguration sharedCacheMode (    SharedCacheMode sharedCacheMode ) Specify the shared cache mode for the persistence unit . Parameters: sharedCacheMode - the shared cache mode Returns: this configuration. Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta. persistence .PersistenceConfiguration PersistenceConfiguration validationMode (    ValidationMode validationMode ) Specify the validation mode for the persistence unit . Parameters: validationMode - the shared cache mode Returns: this configuration. Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta. persistence .PersistenceUnitUtil boolean isLoaded (    Object entity ) Determine the load state of an entity belonging to the persistence unit ... whose load state is to be determined Returns: false if the entity has not been loaded, else true. Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta. persistence .EntityManagerFactory PersistenceUnitTransactionType getTransactionType() The type of transaction management used by this persistence unit , either resource-local transaction management, or JTA. Since: Jakarta Persistence (JPA) 3.2

Jakarta Persistence (JPA) Method in jakarta. persistence .EntityManagerFactory SchemaManager getSchemaManager() Return interface providing access to schema management operations for the persistence unit . Returns: an instance of SchemaManager . Throws: IllegalStateException - if the entity manager

the managed types belonging to the persistence unit . Returns: an instance of Metamodel . Throws: IllegalStateException - if the entity manager has been closed. Since: Jakarta Persistence (JPA) 2.0 ... Jakarta Persistence (JPA) Method in jakarta. persistence .EntityManager Metamodel getMetamodel

Jakarta Persistence (JPA) Method in jakarta. persistence .EntityManagerFactory String getName() The name of the persistence unit . Since: Jakarta Persistence (JPA) 3.2

Jakarta Persistence (JPA) Method in jakarta. persistence .EntityManagerFactory PersistenceUnitUtil getPersistenceUnitUtil() Return interface providing access to utility methods for the persistence unit . Returns: an instance of PersistenceUnitUtil . Throws: IllegalStateException - if the entity

Jakarta Persistence (JPA) Method in jakarta. persistence .EntityManagerFactory Metamodel getMetamodel() Return an instance of the Metamodel interface for access to the metamodel of the persistence unit . Returns: an instance of Metamodel . Throws: IllegalStateException - if the entity manager factory has been closed. Since: Jakarta Persistence (JPA) 2.0

Jakarta Persistence (JPA) Enum Constant in jakarta. persistence .SharedCacheMode NONE Caching is disabled for the persistence unit . Since: Jakarta Persistence (JPA) 1.0

names must be unique within the persistence unit . Default: "" Since: Jakarta Persistence (JPA) 1.0 ... Jakarta Persistence (JPA) Method in jakarta. persistence .NamedEntityGraph String name (Optional) The name used to identify the entity graph in calls to EntityManager.getEntityGraph . If no name

Jakarta Persistence (JPA) Method in jakarta. persistence .SchemaManager void create (    boolean createSchemas ) Create database objects mapped by entities belonging to the persistence unit ... , otherwise, assume the schemas already exist Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta. persistence .SchemaManager void drop (    boolean dropSchemas ) Drop database objects mapped by entities belonging to the persistence unit ... - if true , drop schemas, otherwise, leave them be Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Method in jakarta. persistence .SchemaManager void truncate() Truncate the database tables mapped by entities belonging to the persistence unit , and then re-import initial ... is undefined. A provider may throw an exception, or it may ignore the problem and continue. Since: Jakarta Persistence (JPA) 1.0

the transaction type for the persistence unit . Parameters: transactionType - the transaction type Returns: this configuration. Since: Jakarta Persistence (JPA) 1.0 ... Jakarta Persistence (JPA) Method in jakarta. persistence .PersistenceConfiguration

Jakarta Persistence (JPA) Interface jakarta. persistence .criteria.CriteriaBuilder Used to construct ... compatible with varags. Since: Jakarta Persistence (JPA) 2.0 The JPA Criteria API Queries article ... : absolute value. Since: Jakarta Persistence (JPA) 1.0 Expression all ( Subquery subquery ) Create

Jakarta Persistence (JPA) Class in jakarta. persistence . Persistence jakarta. persistence . Persistence .PersistenceUtilImpl java.lang.Object ∟ jakarta. persistence . Persistence .PersistenceUtilImpl Implemented Interfaces: PersistenceUtil Since: Jakarta Persistence (JPA) 1.0 Public Instance Methods boolean

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Jakarta Persistence (JPA) Interface jakarta. persistence .criteria.MapJoin Type Parameters ... collection that has been specified as a Map . Since: Jakarta Persistence (JPA) 2.0 Public Instance ... Parameters: name - alias Returns: selection item. Since: Jakarta Persistence (JPA) 1.0 Expression as

Jakarta Persistence (JPA) Interface jakarta. persistence .criteria.ListJoin Type Parameters ... that has been specified as a List . Since: Jakarta Persistence (JPA) 2.0 Public Instance Methods Selection alias ... : selection item. Since: Jakarta Persistence (JPA) 1.0 Expression as ( Class type ) Perform

Jakarta Persistence (JPA) Interface jakarta. persistence .criteria.PluralJoin Type Parameters ... query construction. Since: Jakarta Persistence (JPA) 2.0 Public Instance Methods Selection alias ... Returns: selection item. Since: Jakarta Persistence (JPA) 1.0 Expression as ( Class type ) Perform

Jakarta Persistence (JPA) Interface jakarta. persistence .criteria.SetJoin Type Parameters ... that has been specified as a Set . Since: Jakarta Persistence (JPA) 2.0 Public Instance Methods Selection alias ( String ... : selection item. Since: Jakarta Persistence (JPA) 1.0 Expression as ( Class type ) Perform a typecast

Jakarta Persistence (JPA) Interface jakarta. persistence .criteria.CollectionJoin Type Parameters ... that has been specified as a Collection . Since: Jakarta Persistence (JPA) 2.0 Public Instance ... Parameters: name - alias Returns: selection item. Since: Jakarta Persistence (JPA) 1.0 Expression as ( Class

Jakarta Persistence (JPA) Interface jakarta. persistence .criteria.Join Type Parameters ... Persistence (JPA) 2.0 The FROM clause (JPQL / Criteria API) article explains how to use Join . Public ... Selection Parameters: name - alias Returns: selection item. Since: Jakarta Persistence (JPA) 1.0 Expression

Jakarta Persistence (JPA) Interface jakarta. persistence .criteria.Root Type Parameters ... Persistence (JPA) 2.0 The FROM clause (JPQL / Criteria API) article explains how to use Root ... Selection Parameters: name - alias Returns: selection item. Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Interface jakarta. persistence .criteria.From Type Parameters ... to the type. Since: Jakarta Persistence (JPA) 2.0 Public Instance Methods Selection alias ( String name ... . Since: Jakarta Persistence (JPA) 1.0 Expression as ( Class type ) Perform a typecast

Jakarta Persistence (JPA) Interface jakarta. persistence .TypedQuery Type Parameters: - query result ... . See Also: Query Parameter Since: Jakarta Persistence (JPA) 2.0 Chapter 4 - JPA Queries (JPQL / Criteria ... : IllegalStateException - if called for a Jakarta Persistence query language SELECT statement or for a criteria

Jakarta Persistence (JPA) Interface jakarta. persistence .Query Interface used to control query execution. See Also: TypedQuery StoredProcedureQuery Parameter Since: Jakarta Persistence (JPA) 1.0 ... . Throws: IllegalStateException - if called for a Jakarta Persistence query language SELECT

Jakarta Persistence (JPA) Interface jakarta. persistence .StoredProcedureQuery Super Interfaces ... Since: Jakarta Persistence (JPA) 2.1 Public Instance Methods boolean execute () Return true if the first ... timeout value set and only the statement is rolled back. Since: Jakarta Persistence (JPA) 1.0 int

Jakarta Persistence (JPA) Interface jakarta. persistence .criteria.Subquery Type Parameters ... . A subquery has an expression as its selection item. Since: Jakarta Persistence (JPA) 2.0 Public ... Parameters: name - alias Returns: selection item. Since: Jakarta Persistence (JPA) 1.0 Expression

Jakarta Persistence (JPA) Interface jakarta. persistence .metamodel.EntityType Type Parameters ... An instance of EntityType represents an entity type. Since: Jakarta Persistence (JPA) 2.0 Public Instance ... of the given name is not present in the managed type. Since: Jakarta Persistence (JPA) 1.0 Set

Jakarta Persistence (JPA) Interface jakarta. persistence .metamodel.IdentifiableType Type Parameters ... Persistence (JPA) 2.0 Public Instance Methods Attribute getAttribute ( String name ) Return the attribute ... Persistence (JPA) 1.0 Set getAttributes () Return the attributes of the managed type. Inherited from