ObjectDB Database Search

Jakarta Persistence (JPA) Enum Constant in jakarta.persistence.LockModeType PESSIMISTIC _ READ Pessimistic read lock. Since: Jakarta Persistence (JPA) 2.0

Jakarta Persistence (JPA) Enum Constant in jakarta.persistence.LockModeType PESSIMISTIC _WRITE Pessimistic write lock. Since: Jakarta Persistence (JPA) 2.0

Jakarta Persistence (JPA) Enum Constant in jakarta.persistence.LockModeType PESSIMISTIC _FORCE_INCREMENT Pessimistic write lock, with version update. Since: Jakarta Persistence (JPA) 2.0

Jakarta Persistence (JPA) Enum Constant in jakarta.persistence.LockModeType READ Synonymous with LockModeType.OPTIMISTIC . OPTIMISTIC is preferred for new applications. Since: Jakarta Persistence (JPA) 1.0

index) - and my test case is failing here. The issue is that once the pessimistic lock is in place ... on stale updates. Willks William Support of  pessimistic lock timeout setting ( javax.persistence ... .ProductCodeTracking:1 I have to stress, that the pessimistically locked entity has a transaction

we are protecting object access via pessimistic lock of objects. in a multi thread environment ... The following example shows how pessimistic locking should work in ObjectDB (and JPA): public class F2992 ... . PESSIMISTIC _WRITE); System.out.println("Thread A: got lock, updating..."); e.setName("by A"); Thread

with valid values of Status. This is all done with JPA/EJBs. However, at the time of reading the Object (findById), the system throws an error  com.objectdb.o.UserException: Failed to read

Hi, it happened already few times (seemingly randomly), that some db operation ( read ... ._JdoUserException: Failed to read from file '/path_to_db/dbFile.odb' NestedThrowables: java.io ... by: com.objectdb.o._JdoUserException: Failed to read from file '/path_to_db/dbFile.odb

.objectdb.o.InternalException: Error reading UTF string at org.jboss.as.ejb3.tx.CMTTxInterceptor ... reading UTF string at granat.dp.ejb.PersonBean.find(PersonBean.java:287) [DP-ejb.jar:] at sun.reflect ... .1.1.Final] ... 88 more Caused by: com.objectdb.o.InternalException: Error reading UTF string at com

- we sometimes fail to read entities from the database. I've isolated this issue to a fairly simple test ... test that creates, reads and updates these entities in multithreaded application it sometimes fails to read them from the DB with "No matching results for a unique query" error

well. Today we restarted the app and it threw the following exception during startup while trying to read ... well. Although the stack trace indicates an error while reading the hash map, if some objects in the database

;   -dh dhosek Don Hosek Fetching doesn't work by default for detached objects. Please read

. My application works fine with them up to I try to launch it in debug mode in eclipse. Upon reading it in debug

Hello, we got following exception. Can you explain me, what is the reason of this exception?   Caused by: com.objectdb.o.UserException: Failed to read the value of field field com.btc.ep.expression.formula.bl.dmos.Valuation.variableSettings using reflection at com.objectdb.o.MSG.a(MSG.java:77

Greetings, this NPE happened in our app first time today while reading objects from DB. Could u please check what could be the issue ? Inner message: Cannot invoke "com.objectdb.o.ORS.YD()" because " " is null -------------------- com.objectdb.o.TYR. (TYR.java:113) com.objectdb.o.ENT

. JPA adds support for pessimistic locking . The setLockMode method sets a lock mode to apply to all result objects that the query retrieves. For example, the following code sets a pessimistic WRITE lock on all the result objects: List results = query. setLockMode ( LockModeType . PESSIMISTIC _WRITE

(FlushModeType) Lock mode Specifies the locking strategy: optimistic or pessimistic , shared ( READ ) or ... , RefreshOption . Pass as an argument to lock() , find() , or refresh() . Pessimistic lock scope Defines the scope of a pessimistic lock: NORMAL or EXTENDED . Usage EntityManagerFactory Set

pessimistic lock on an entity instance. The full range of possible lock types is enumerated by LockModeType ... within the persistence context and the lock mode type is pessimistic and the entity has a version attribute ... . If these checks fail, the OptimisticLockException is thrown. If the lock mode type is pessimistic and the entity

, it must throw the PersistenceException . The lock modes PESSIMISTIC _ READ , PESSIMISTIC _WRITE ... of requesting locks of type LockModeType. PESSIMISTIC _ READ , LockModeType. PESSIMISTIC _WRITE ... LockModeType. PESSIMISTIC _ READ or LockModeType. PESSIMISTIC _WRITE on an object, the entity manager

DELETE statement. PessimisticLockException - if pessimistic locking fails and the transaction is rolled back. LockTimeoutException - if pessimistic locking fails and only the statement is rolled ... Persistence query language UPDATE or DELETE statement. PessimisticLockException - if pessimistic locking

both read and write operations. The other nodes in the cluster, known as slave nodes, manage identical, read -only copies of the database. Updates to the master database are automatically propagated

. It seems that there is a problem in reading the pricing field, whose type is serializable ( Money ... , which is needed during read . Please check this query (and accessing that instance in general) from your program

Hello, we have found several these exceptions in our log [ObjectDB 2.5.0_06] javax.persistence.PersistenceException Failed to read from file 'C:\SafeQORS\server\cache\MainORSCache.odb' (error 117 ... : Failed to read from file 'C:\SafeQORS\server\cache\MainORSCache.odb' at com.objectdb.o.MSG.d(MSG.java

Second thing after @FetchGroup I've found is read -only hint for EM. You can specify this hint to EM when executing query meaning that returned data will never be edited or persisted ... .setHint("odb. read -only", "true"); This could be useful in situation when you are sure, that you won't

reading from table gives Unexpected exception [ObjectDB 2.6.3] Unexpected exception (Error 990)   Generated by Java HotSpot(TM) 64-Bit Server VM 1.8.0_131 (on Windows 10 10.0). Please report this error on http://www.objectdb.com/database/issue/new com.objectdb.o.InternalException: null com

we have since today exceptions on executing some queries like this: Failed to read from file 'F:\Hummingbird\Objectdb\db\coreSystemDb.odb' we are using objectdb 2.7.2_05 in the objectdb log there is no message       hgzwicker Hans-Georg Zwicker it seams that this is only happening

the specified options . If a pessimistic lock mode type is specified and the entity contains a version ... is pessimistic and the entity instance is found but cannot be locked: the PessimisticLockException is thrown ... lockMode - lock mode entity - a managed entity instance Throws: LockTimeoutException - if pessimistic

to the persistence context, obtaining the specified lock mode . If a pessimistic lock mode type is specified ... . If the lock mode type is pessimistic and the entity instance is found but cannot be locked ... - if pessimistic locking fails and only the statement is rolled back. PessimisticLockException

properties. If a pessimistic lock mode type is specified and the entity contains a version attribute ... lock. If these checks fail, the OptimisticLockException is thrown. If the lock mode type is pessimistic ... - if pessimistic locking fails and only the statement is rolled back. PessimisticLockException

that field. Version fields should be treated as read -only by the application, and you shouldn't write

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The best source for learning ObjectDB is the ObjectDB Manual , which contains all the necessary information for using ObjectDB. The only required background is a good understanding of the Java language. Reading the manual and getting started with ObjectDB could be easier for developers with prior

Please read the ObjectDB licence page.

more detail how to use the EntityManager and transactions for create, read , update, and delete (CRUD) database operations.

This chapter explains how to manage ObjectDB databases by using Jakarta Persistence (JPA). The first two pages introduce basic JPA interfaces and concepts: The next section explains how to use JPA for database CRUD (create, read , update, and delete) operations: The final section discusses advanced topics, such as locking and events:

=REFRESH . If the lock mode type is pessimistic and the entity instance is found but cannot be locked ... : PessimisticLockException - if pessimistic locking fails and the transaction is rolled back. LockTimeoutException - if pessimistic locking fails and only the statement is rolled back. EntityNotFoundException

is pessimistic and the entity instance is found but cannot be locked: the PessimisticLockException ... : PessimisticLockException - if pessimistic locking fails and the transaction is rolled back. LockTimeoutException - if pessimistic locking fails and only the statement is rolled back. EntityNotFoundException

. If the lock mode type is pessimistic and the entity instance is found but cannot be locked ... - if pessimistic locking fails and the transaction is rolled back. LockTimeoutException - if pessimistic locking fails and only the statement is rolled back. EntityNotFoundException - if the entity

language UPDATE or DELETE statement. PessimisticLockException - if pessimistic locking fails and the transaction is rolled back. LockTimeoutException - if pessimistic locking fails

. LockTimeoutException - if pessimistic locking fails and only the statement is rolled ... timeout value set and only the statement is rolled back. PessimisticLockException - if pessimistic locking

language UPDATE or DELETE statement. LockTimeoutException - if pessimistic locking fails ... back. PessimisticLockException - if pessimistic locking fails and the transaction is rolled

- if pessimistic locking fails and the transaction is rolled back. LockTimeoutException - if pessimistic locking

Thrown by the persistence provider when a pessimistic locking conflict occurs. This exception

: This is the end of the tutorial. Learn more about ObjectDB and JPA by reading the Manual .

; ObjectDB Explorer : This is the end of the tutorial. Learn more about ObjectDB and JPA by reading the  Manual .

: This is the end of the tutorial. Learn more about ObjectDB and JPA by reading the Manual .

by opening it in the ObjectDB Explorer : This is the end of the Eclipse JPA tutorial. Learn more about ObjectDB and JPA by reading the Manual .

the database file in ObjectDB Explorer : This is the end of the tutorial. Learn more about ObjectDB and JPA by reading the Manual .

server and open the database file in ObjectDB Explorer : This is the end of the tutorial. Learn more about ObjectDB and JPA by reading the Manual .

of the tutorial. Learn more about ObjectDB and JPA by reading the Manual .