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Version 2.5.6 enhancement problem solved by updating to version 2.5.7_03

Version 2.5.6 enhancement problem solved by updating to version 2.5.7_03
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Replication error on slave restart

previously. I have copied database file to slave... and so on by manual. It worked fine. But if I restart ... UP TO DATE] 6) got this on slave after step 3: com.objectdb.o.UserException: Optimistic lock failed ... .java:203) at java.lang.Thread.run(Unknown Source) 7) got exception from step 6 every time
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Unable to run NetBeans/JPA Web Application Tutorial

downloading and running the tutorial, if following step by step doesn't work. pryashrma ... I followed each and every step of NetBeans/JPA Web Application Tutorial but when i am trying to run the web application the following error is prompted on the run console: Start is in progress
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ObjectDB Object Database Features

Databases are also supported by ObjectDB. The combination of Object Database features ... . Up to 9,223,372,036,854,775,808 entity objects per database file. Unlimited database connections (limited only by operating system resources). Unlimited CPUs and cores. Reliability and Stability Recovery from failure by
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JPA Primary Key

the database is uniquely identified (and can be retrieved from the database) by the combination of its type ... have their own separate identity. Automatic Primary Key By default the primary key is a sequential 64 bit number (long) that is set automatically by ObjectDB for every new entity object that is stored
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Storing JPA Entity Objects

New entity objects can be stored in the database either explicitly by invoking the persist method ... is committed. An IllegalArgumentException is thrown by persist if the argument is not an instance ... is thrown. The exception is thrown either by persist (if that existing entity object is currently
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system exception occurred during an invocation on EJB GuestDao

$Worker.run(AbstractThreadPool.java:544) at java.lang.Thread.run(Thread.java:744) Caused by: java ... (Thread.java:744) Caused by: java.lang.IllegalStateException: Unable to retrieve ... a failure to find a persistence unit with a null name: Caused by: java.lang.IllegalStateException
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Update Entity references if we change the type of an entity

to this element. And we thought that also the real references are based on the ID. This step is done by our updateDB (we call this step profileMigration) But after this conversion, the reference from ... Embedded Systems AG References to entity objects are implemented by ObjectDB as a pair of (type + id
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Paths and Types in JPQL and Criteria API

classes) are represented in JPQL by the following types of expressions: Variables - FROM ... and functions (e.g. for strings and for numbers), they can be compared by all six comparison operators ... with an instance of a user defined class (represented by a variable, parameter or prefix path expression
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2

Query Parameters in JPA

) The following method retrieves a Country object from the database by its name: public Country ... method. The setParameter method supports method chaining (by returning the same TypedQuery instance ... . Named parameters can be easily identified in a query string by their special form, which is a colon