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(); emf.close(); } public void storeRecord(Record r) { em.getTransaction(). begin (); em.persist(r); em ... ._PersistenceException: Attempt to begin a new transaction when a transaction is active root cause com.objectdb.o._PersistenceException: Attempt to begin a new transaction when a transaction is active root cause

JPA Method in javax.persistence.EntityTransaction void begin () Start a resource transaction. Throws: IllegalStateException - if isActive() is true Since: JPA 1.0

", "Joseph", "Wurzelbacher"); em. getTransaction (). begin (); em. persist (employee); em. getTransaction ... (address); em. getTransaction (). begin (); em. persist (employee); em. getTransaction (). commit ... . The combination of the clear and flush methods can be used to save memory in large transactions: em. getTransaction (). begin (); for (int i = 1; i

anything outside that window). The setFirstResult method is used to specify where the result window begins , i.e. how many results at the beginning of the complete result list should be skipped and ignored

to begin a transaction: em. getTransaction (). begin (); There is a one to one relationship between

that is available via the getTransaction method: try { em. getTransaction (). begin (); // Operations that modify ... (). isActive ()) em. getTransaction (). rollback (); } A transaction is started by a call to begin

. getTransaction (). begin (); employee.setNickname("Joe the Plumber"); em. getTransaction (). commit ... . getTransaction (). begin (); employee.projects[0] = new Project(); // not detected automatically

Given an EntityManager , em , that represents a JPA connection to the object database, we can use it to store, retrieve, update and delete database objects. Storing New Entity Objects The following code fragment stores 1,000 Point  objects in the database: em. getTransaction (). begin

); em. getTransaction (). begin (); em. remove (employee); em. getTransaction (). commit (); The entity

.getTransaction(). begin ();         MyEntity e = new MyEntity("test

, the Explorer automatically begins a new transaction for the next editing session. Options and Settings

) Warning: javax.ejb.EJBException: com.objectdb.o._PersistenceException: Attempt to begin a new ... get that error: Caused by: com.objectdb.o.UserException: Attempt to begin a new transaction ... on next call to buildProject(String projectName) //'com.objectdb.o.UserException: Attempt to begin a new

; logger.log(Level.INFO, " begin select for person " + new Date().toString());     ... (Level.INFO, " begin refresh for person = " +            ... + "  "+ new Date().toString());     }   INFO: begin select for person

JDO Method in javax.jdo.Transaction void begin () Begin a transaction. The type of transaction is determined by the setting of the Optimistic flag. Throws: JDOUserException - if transactions are managed by a container in the managed environment, or if the transaction is already active. See Also: setOptimistic getOptimistic Since: JDO 1.0

; [ObjectDB 2.6.9_09] javax.persistence.PersistenceException Attempt to begin a new transaction when a transaction is active (error 612) at com.objectdb.jpa.EMImpl. begin (EMImpl.java:275) at javax.persistence.EntityTransaction$ begin .call(Unknown Source) at app.database.ObjectDbDatabase.transact

demonstrated by the following code: pm.currentTransaction(). begin (); Person person = new Person("George ... .currentTransaction(). begin (); pm.makePersistent(person); pm.currentTransaction().commit(); Multiple objects ... (). begin (); Person person = new Person("George", "Bush"); pm.makePersistent(person); Object oid = pm

(); pm.currentTransaction(). begin (); System.out.println("Cache size after commit= " + pm ... ) and there is a result OBJECTDB OUTPUT: main--testDbProvisioning Cache size before COMMIT/ BEGIN = 1 transient transient Cache size after COMMIT/ BEGIN = 2630 transient transient Cache size after pm.evict = 2630  

to the SF I get com.objectdb.o._PersistenceException: Attempt to begin a new transaction when a transaction is active. In principal The SF doesn't need to begin any transaction since it only get called ... ._PersistenceException: Attempt to begin a new transaction when a transaction is active at com

().isActive()) {             em.getTransaction(). begin ... ;       em.getTransaction(). begin ();       ... = emf.createEntityManager();         em.getTransaction(). begin

(). begin ();   entityManager.persist(parentEntity);   parentEntity.addChild(new ChildEntity ... = entityManager.find(ParentEntity.class, Long.valueOf(1));   entityManager.getTransaction(). begin ... .refresh(parentEntity);   entityManager.getTransaction(). begin ();   ChildEntity childEntity2

// Create or open a database and begin a transaction: 12 PersistenceManager pm = 13 Utilities.getPersistenceManager("hello.odb"); 14 pm.currentTransaction(). begin (); 15 16 // Obtain a persistent list: 17 ... PersistenceManager pm = pmf.getPersistenceManager(); 29 30 try { 31 // Begin the transaction: 32 pm

: PersistenceManager pm = pmf.getPersistenceManager(); try { pm.currentTransaction(). begin (); // Operations ... for managing transactions. A transaction is started by a call to begin () and ended by a call to commit ... above: PersistenceManager pm = pmf.getPersistenceManager(); Transaction tr = pm.currentTransaction(); try { tr. begin

.getTransaction(). begin (); em.persist(new Guest(name)); em.getTransaction().commit(); } // Display the list

transaction  begin and  commit . The next step is adding a Servlet Class that will serve as the application controller.

transaction begin and commit . The next step is adding a Controller Class .  

= emf.createEntityManager(); // Store 1000 Point objects in the database: em.getTransaction(). begin (); for (int i = 0; i

.createEntityManager(); // Store 1000 Point objects in the database: em.getTransaction(). begin (); for (int i = 0; i

transaction begin and commit . The next step is adding a Controller Class .  

begin and commit . The next step is adding a Servlet Class that will serve as the application controller.

.getParameter("name"); if (name != null) { em.getTransaction(). begin (); em.persist(new Guest(name)); em

Methods void begin () Start a resource transaction. Throws: IllegalStateException - if isActive() is true

. The EntityTransaction instance may be used serially to begin and commit multiple transactions. Return

JPA Method in javax.persistence.EntityManager EntityTransaction getTransaction () Return the resource-level EntityTransaction object. The EntityTransaction instance may be used serially to begin and commit multiple transactions. Return: EntityTransaction instance Throws: IllegalStateException - if invoked on a JTA entity manager Since: JPA 1.0

Changes", the Explorer automatically begins a new transaction for the next editing session

to its value at the beginning of the transaction. default-fetch-group (true | false) The default-fetch-group

;                em.getTransaction(). begin ... .createEntityManager(); em.setFlushMode(FlushModeType.AUTO); em.getTransaction(). begin (); ModelElementImpl ... .createEntityManager(); em.setFlushMode(FlushModeType.AUTO); em.getTransaction(). begin

may only be used with bean-managed transaction semantics. Since: JDO 1.0 Public Methods void begin () Begin a transaction. The type of transaction is determined by the setting of the Optimistic flag ... to their values as of the beginning of the transaction, and the instances revert to transient. Additionally

returns the object id as of the beginning of the current transaction. Return: a copy of the ObjectId of this instance as of the beginning of the transaction. See Also: PersistenceManager.getObjectId

of newly persistent instances are restored to their values as of the beginning of the transaction ... and immutable reference types are restored to their values as of the beginning of the transaction

, at rollback, fields of newly persistent instances are restored to their values as of the beginning ... of primitive types and immutable reference types are restored to their values as of the beginning

of the beginning of the transaction, and the instances revert to transient. Additionally, fields ... of the beginning of the transaction. If false , at rollback, the values of fields of newly persistent

is being changed in the transaction, this method returns the object id as of the beginning of the current transaction. Return: a copy of the ObjectId of this instance as of the beginning of the transaction

JDO Method in javax.jdo.spi.StateManager Object getObjectId (   PersistenceCapable pc ) Return the object representing the JDO identity of the calling instance. If the JDO identity is being changed in the current transaction, this method returns the identity as of the beginning

- the PersistenceCapable instance. Return: a copy of the ObjectId of the parameter instance as of the beginning

- the PersistenceCapable instance. Return: a copy of the ObjectId of the parameter instance as of the beginning

key fields, then this method returns the identity as of the beginning of the transaction. The value

of the ObjectId of the parameter instance as of the beginning of the transaction

as of the beginning of the transaction. Parameters: pc - the calling PersistenceCapable instance

instance as of the beginning of the transaction. See Also: PersistenceManager.getObjectId (Object

as of the beginning of the transaction. The value returned by getObjectId will be different following