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 entityManager. clear (); Vladiator Vlad Myachikov Every managed entity object is associated with an helper ENT object.  entityManager. clear () should release strong references to ENT objects ... too. Vladiator Vlad Myachikov With "objectdb.temp.no-detach" enabled, clear () is silently ignored

I'm working on trying to improve the performance of our database processing class and I'm attempting to keep the L1 cache within the PersistenceManager cleared in an effort to reduce its memory ... . Is there something else I can do to the toDelete collection to get it to delete properly if I have cleared

JPA Method in javax.persistence.EntityManager void clear () Clear the persistence context, causing all managed entities to become detached. Changes made to entities that have not been flushed to the database will not be persisted. Since: JPA 1.0

I'm having trouble with flush() and clear () in a loop inside a transaction not persisting modified objects to database. Sometimes it does other times it doesn't. Here is my Entity. import javax.persistence.Basic; import javax.persistence.Entity; import javax.persistence.Id; import javax

Record is not clearing properly on remove

); The persistence context can be cleared by using the clear method: em. clear (); When the persistence context is cleared all of its managed entities become detached and any changes to entity objects that have not

operations clear the entire EntityManager 's persistence context and detach all managed entity objects: Invocation of the close method, which closes an EntityManager . Invocation of the clear method, which clears an EntityManager 's persistence context. Rolling back a transaction - either by invocation

. 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

electronic files known as web beacons (also referred to as clear gifs, pixel tags, and single-pixel

a computer virus). Given all these causes it is clear that database files should be backed up regularly

: cache. evict (MyEntity.class); // Clear the shared cache by removing all the cached entity objects

execution plan. This is useful, for example, for checking which indexes are used. The Reset button clears

null is returned. I have tried to clear the entity manager in the second call to make sure the reading ... is detached between the calls, check this issue and the no-detach solution. I have tried to clear ... . Actually clear detaches managed objects and could make things harder in this case. I have tried

JDO Static Field in javax.jdo.listener.InstanceLifecycleEvent CLEAR Since: JDO 2.0

calling JPA's clear or similar methods, but if this is the problem, it would be better to solve ... PM with every commmit). This shows that the objects are only cleared from heap on PersistenceManager ... madhuarish Bhanu Pathak The cause of the problem is still unclear. As a workaround, try clearing

is: [ObjectDB 2.4.1_03] javax.persistence.PersistenceException Failed to clear field property com ... (RemoteTestRunner.java:197) Caused by: com.objectdb.o.UserException: Failed to clear field property com.contextspace ... that ObjectDB builds a new entity object for merge, which includes clearing the new constructed object

has not been cleared as expected. Looking at the relevant ObjectDB code it seems that this situation ... that you can try if the above doesn't help is clearing  before closing:     em. clear ();     em.close(); support Support thanks for quick reply. Currently

Jared Hinze If the problem is an UPDATE query (as shown clearly on post #5 but was less clear from post #1) then there is no need for a test case as the situation is clear (if post #1 and post #5 deal ... more the SQL way than the JPA way. Clear the internal EntityManager cache by using clear after an UPDATE

ist to clear the entity-manager and leave it attachted for further using. Are there any concerns ... . If I call entityManager. clear () does the first level cache is empty then? If not does fetching ... the cleared entity-manager will use the cached but outdated version? Just for information

#Batch_Store_ . However the problem is that it seems that even calling flush followed by clear ... () = 5000) {     this.commitCount.set(0); this.em.flush(); this.em. clear (); System.err ... ().commit(); this.em. clear (); this.em.close();     System.err.println("Commit

(); m_EntityManager.flush(); m_EntityManager. clear (); m_EntityManager.close(); } After executing code ... .getTransaction().commit(); m_DataKeysCache. clear (); m_EntityManager.flush(); m_EntityManager. clear ... and release memory m_EntityManager.flush(); m_EntityManager. clear (); m_EntityManager.close(); But memory

is needed. @Override public void jdoPreClear(){ if(null != softReferenceData) softReferenceData. clear ... ) softReferenceData. clear (); softReferenceData = null; } @Override public void jdoPostLoad ... . if(null != softReferenceData) softReferenceData. clear (); softReferenceData = null; } public void postStore

unknown It is the application responsibility to clear references to removed objects. Cascading removal operates on the other direction and cannot clear references after removal. If you use bidirectional relationship then you only have to clear the owner side, the owned side will be cleared automatically

Emmanuel Keskes Another thing I just noticed: I used to do a clear after running each query - The lock contention disappears when I removed the "em. clear ()" - Obviously I need to clear the entity managers - it looks like the em. clear () of one query blocks the other query.  Hope it helps.   EKK

;   em.getTransaction().commit();         em. clear ... ().commit();         em. clear ();        ... , resultList.size());         em. clear ();      

is needed if used to clear all cache, e.g. to open a new EntityManager after such query operations and disable the L2 data cache. support Support What about calling em.flush(); em. clear ... ; I have done some test cases, and doing a em.flush(); em. clear (); after the query

all the details are clear . Why should you roll back that view transaction, what is the purpose of comitting ... , although not all the details are clear . Why should you roll back that view transaction ... . Rollback is fine, of course, and with your detailed explanations it is clear now why you need

.persist(guest); em.getTransaction().commit(); em.flush(); em.refresh(guest); em. clear (); em.close ... .getTransaction().begin(); em.merge(guest); em.getTransaction().commit(); em.flush(); em. clear (); em.close ... .setParameter(s, map.get(s)); boolean que = q.executeUpdate() 0; em.getTransaction().commit(); em. clear (); em

Connection using JPA article explains how to use EntityManager . Public Methods void clear () Clear

JPA Method in javax.persistence.Cache void evictAll () Clear the cache. Since: JPA 2.0

() Clear the cache. Since: JPA 2.0 T unwrap (Class  cls) Return an object of the specified type

the query form. The "Reset" button clears the content of all the fields. To execute a query click

when the persistent fields are going to be cleared at transaction end (for example on rollback). This event is rarely

: Calendar calendar = Calendar.getInstance(); calendar. clear (); calendar.set(2000, 0, 1); Date date

five flags that can be set or cleared . All these optional modes are supported by ObjectDB. Flags

When using JQL-Update Queries it is basically not working without calling entityManager. clear () after a transaction commit. When the clear () method isn't called the entityManager will never return ... using UPDATE-Query, calling entityManger. clear () and fetching Entities afterwards from database

:55) [com.btc.ep.base.dal.tests.it/:na] btc_es BTC EmbeddedSystems Do you invoke em. clear after flush ... due to a missing clear ). The new temporary files have effect only on the server side. You specify ... Support Yes, we invoke em. clear after flush. And we can see how the ObjectDB temp file pages0.dat

? maybe you can use rollback or clear instead of commit? Do you always use only enhanced classes ... so we do not need to commit - commit is a NOOP. If it is faster to rollback or just to clear ... expect performance improvements with rollback / clear , although it makes more sense to use them and maybe

(removed temporary object clearing ). Fixed the Explorer to show null values in primitive fields (unset values in new fields) correctly. Fixed a bug in clearing embedded objects during merge. Added automatic cascading through embedded objects. Fixed a bug in clearing persistent properties of primitive

is implemented by listeners to be notified of clear events. Since: JDO 2.0 Public Methods void ... method is invoked on the instance and the fields have been cleared by the JDO implementation. Parameters: event - the clear event. Since: JDO 2.0 void preClear ( InstanceLifecycleEvent  event

the state of non-persistent fields, and when a JDO instance transitions to hollow, JDO clears the persistent fields. It is the programmer's responsibility to clear non-persistent fields so that garbage ... void jdoPreClear () Called before the values in the instance are cleared . Transient fields

ClearCallback.jdoPreClear and before it clears the values in the instance to their Java default values ... to hollow. Non-persistent, non-transactional fields should be cleared in this method. Associations between this instance and others in the runtime environment should be cleared . This method is not

JDO Interface ClearCallback This interface is used to notify instances of clear events. Since: JDO 2.0 Public Methods void jdoPreClear () Called before the values in the instance are cleared . Transient fields should be cleared in this method. Associations between this instance and others in

JDO Method in javax.jdo.listener.ClearCallback void jdoPreClear () Called before the values in the instance are cleared . Transient fields should be cleared in this method. Associations between this instance and others in the runtime environment should be cleared . This method is not modified by the enhancer. Since: JDO 2.0

JDO Method in javax.jdo.listener.ClearLifecycleListener void postClear (    InstanceLifecycleEvent  event ) This method is called after the ClearCallback.jdoPreClear method is invoked on the instance and the fields have been cleared by the JDO implementation. Parameters: event - the clear event. Since: JDO 2.0

method executed on the proxy closes the PersistenceManager and then clears the ThreadLocal. Use

on the proxy closes the PersistenceManager and then clears the ThreadLocal. Use of this method does not

JDO Method in javax.jdo.Query void setExtensions (   Map extensions ) Set multiple extensions, or use null to clear all extensions. Map keys and values are not standard. An implementation must ignore entries that are not recognized. Parameters: extensions - the map of extensions See Also: addExtension Since: JDO 2.0

setExtensions (Map extensions) Set multiple extensions, or use null to clear all extensions. Map

Specification" Since: JDO 2.0 Public Static Fields ATTACH Since: JDO 2.0 CLEAR Since: JDO 2.0 CREATE