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are still running? Another option, do you use multiple databases in that test? If you do, maybe ... to ObjectDB on each JVM? Maybe this issue is related to multiple threads, possibly using multiple databases, but on the same JVM rather than to multiple JVMs? support Support I checked it in

Hi there, Our app is highly scalable and can be distributed among multiple processes on multiple ... only limitation. Is there a way to spawn multiple server instances "embedded" into our app so we can avoid the single-process restriction though still have multiple processes to avoid a SPOF? Yes, the OEM

but only with an generel answer. What we need are multiple tenants (would be best if every tenant has its own file/db ... this with ObjectDB? ObjectDB doesn't support queries on multiple databases, so it is possible ... to open multiple databases, but currently we don't have an example that does that. If you use

:757) I checked multiple times if the versions match. They do. DB server version 2.6.2. Client ... ;   } This code worked for a couple of years now and is used in multiple projects. mosi0815 ... to every transaction stops to work correctly. I also found multiple examples on the Internet where they don't

that's a crutch. Could there be a way in the future to split the database across multiple files? Thank ... machine either way. Could there be a way in the future to split the database across multiple files ... how breaking a database into multiple files, for example one file per entity class, may help

containing a single oid object (the method is written to support multiple objects ... should return an empty collection. It should work with single or multiple IDs and with any collection ... multiple entities (error 636) at com.objectdb.jdo.PMImpl.getObjectsById(PMImpl.java:512) at com.objectdb

! You can check it by repeating insertion of   a pic of multiples . I can not send the 7GB file ... objects have identity and support multiple references without duplication. All the other types ... loops and file reading operations" will cause the persistence of my class into multiple copies? TIA

with multiple parents), which are unlikely to be solved by the Doctor. Is it the a log for the database ... there should be only one process that accesses the database file. Accessing a database from multiple processes concurrently can cause exactly this issue of structural issues (orphan pages and page with multiple

Hi, does anybody have experience with multi tenant setup of objectDB. For example using multiple schema or multiple database. How to handle connections between app (Jboss Wildfly) and pass query ... use ObjectDB with multiple databases. It is very easy when accessing databases directly (by

We are creating a web app that will have multiple different clients, each on their own EC2 ... given time (100k absolute maximum). We will probably have multiple instances per client for availability ... connections from multiple instances. But from what I can tell, there will be about a 50% performance drop from using Server mode to accommodate the

, Paul paulfo Paul Boon See this sections in the manual regarding SELECT queries that select multiple expressions: Multiple SELECT Expressions Result Classes (Constructor Expressions) What you need is not unique for GROUP BY but for common for queries that return multiple expressions in every result. support Support

when accessing PersistenceManager by multiple threads? 2) Does it lock at PersistenceManager ... PersistenceManager / Transaction methods are synchronized so multiple threads should be able ... a queue) you will need multiple   PersistenceManager instances. In ObjectDB 1.x pessimistic locks

behavior. Embedded objects cannot be shared by multiple references. If you have multiple references to an embedded object during persist then multiple instances of that embedded object are stored in

one  EntityManagerFactory per application, with multiple   EntityManager instances for multiple database connections. support Support

Hi I have not seen, cursory search was not informative, if odb can be embedded like derby.  How does odb handle byte[].  How do you create multiple dbs.  Finally is there a gui ... (see supported types ). How do you create multiple dbs. See this documentation page .  Finally

code is per machine. Use your site license to generate multiple activation codes. You may also specify multiple activation codes in the configuration file (in order to share the same objectdb.conf file

. However, if your application use multiple threads that execute multiple queries against ObjectDB simultaneously

your accessing that object in the database from multiple methods simultaneously or you've got some ... . If you still get the error then you can try waiting before trying the transaction again or trying multiple times. jgleoj23 Joseph Gardi

@ GeneratedValue primary keys are sequential. So when you persist multiple new objects their primary ... primary keys. Automatic @ GeneratedValue primary keys are sequential. So when you persist multiple new

allocation to commit or flush - multiple IDs for multiple objects can be allocated together in one round

; } A possible solution: Avoid multiple Attribute instances with identical type / value by defining a composite ... are currently used in such comparison, so it might be still more efficient to use multiple JOINs in this case

multiple processes (embedded mode supports concurrently only within a JVM, i.e. multithreading ... server mode supports accessing a database concurrently from multiple processes (embedded mode

EntityManagerFactory with multiple   EntityManager instances. It is uncommon to create multiple  

is also for a single user with that specific operation? ObjectDB can use multiple cores to serve concurrent requests from different users, and also tries to use multiple cores for a single request

the database at the same time using multiple threads. However, if all the threads share the same ... ) and you have to use multiple EntityManager/PersistenceManager instances, usually one per thread

multiple EntityManager instances, one per thread. Every thread with its own EntityManager has a private persistence context, i.e. the same database object is represented by multiple separate memory

.  If there is one could this cause the behavior? Yes. ObjectDB supports multiple snapshots of the database for multiple connections (representing by EntityManager instances) by delaying changes

one every time. Out of curiosity, is my current method thread-safe? Can multiple entity managers exist at the same time? Flying Banana Jiacong Xu Creating multiple EntityManagerFactory instances is thread safe

practice in OSGi. Especially am I wondering how I should get this working when I have multiple bundles ... of OSGi with ObjectDB including multiple bundles with entity classes. Unfortunately we do not

JPA Annotation Converts Target: METHOD, FIELD, TYPE Implemented Interfaces: Annotation Used to group Convert annotations. Multiple converters must not be applied to the same basic attribute. See Also: Convert Since: JPA 2.1 Public Annotation Attributes Convert [] value default null The Convert mappings that are to be applied. Since: JPA 2.1

JPA Annotation Attribute in javax.persistence.Convert Class converter default void.class Specifies the converter to be applied. A value for this element must be specified if multiple converters would otherwise apply. Since: JPA 2.1

JPA Annotation NamedNativeQueries Target: TYPE Implemented Interfaces: Annotation Specifies multiple native SQL named queries. Query names are scoped to the persistence unit. The NamedNativeQueries annotation can be applied to an entity or mapped superclass. See Also: NamedNativeQuery Since: JPA 1

JPA Method in javax.persistence.EntityGraph Subgraph addSubgraph (    Attribute  attribute,    Class  type ) Add a node to the graph that corresponds to a managed type with inheritance. This allows for multiple subclass subgraphs to be defined for this node

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

JPA Annotation IdClass Target: TYPE Implemented Interfaces: Annotation Specifies a composite primary key class that is mapped to multiple fields or properties of the entity. The names of the fields or properties in the primary key class and the primary key fields or properties of the entity

Hello. We are currently using ObjectDB in application server Jboss as 7.1.1.final. ObjectDB version is 2.5.3_02. The following errors occur when multiple ajax requests are executed: Caused by: com.objectdb.o.InternalException: Error reading UTF string Caused by: com.objectdb.o.UserException

where multiple threads can hit a shared counter (which is used to track separate customers product

multiple   EntityManagerFactory Instances. support Support

Hi, We are trying to create a servlet that performs database online backup. Unfortunately, even though no exception is thrown, backup files aren't created. When I turn on DEBUG logging in ODB, I get multiple ClassNotFoundExceptions like : [2011-06-04 05:34:14 #2 type.loader] java.lang

you split the transaction to multiple smaller transactions? support Support     ... you split the transaction to multiple smaller transactions? Because it is a large transaction content ... can be larger than the database, since the same database page may be stored in the file multiple times

where our object db home is located at as we might have multiple server instances running on multiple

; PersistenceManager by multiple threads and / or other PersistenceManager instances. You wrote: Both threads ... multiple threads and / or other PersistenceManager instances. You wrote: Both threads were using

with multiple JOIN operations with very slow execution time you may be able to manually select the best

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

a user-defined class. If there are multiple result expressions, the result class must be able to hold

is used to add multiple subqueries, the subquery replaces the previous subquery for the same named

a JDOFatalUserException . If multiple PMFs with the requested name are found, a JDOFatalUserException is thrown

, where multiple PersistenceCapable classes share the same ObjectId class. If the validate flag is false

instance contains a reference to a StateManager . A StateManager might manage one or multiple instances

declaring the field. This allows unambiguous identification of the field to be marked dirty. If multiple