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Forum
15

"Failed to serialize instance" of Set problem

= FetchType.LAZY, mappedBy="parent") private Set abstractContainers = com.google.common.collect.Sets.newIdentityHashSet(); } Got the following exception: com.objectdb.o.UserException: Failed to serialize instance of com.google.common.collect.Sets$SetFromMap - field xxx
Forum
15

Iterating over large result set

of given size until whole result set is iterated.  What I'm thinking about is some kind of streaming of result set from database without building whole object graph representing fetched data in application ... with a hint "objectdb.result-fetch" set to "LAZY". Another option is to use a report query, i.e
Forum
15

JPA and handling large data sets

. But exporting large binary data sets is very slow. To avoid memory problems the binary data type is read step ... sets the way is slow. We have an own entity for storing binary data (pictures, documents). Hint ... the next set of objects. Usually the problem is only with setFirstResult and using setMaxResults
Forum
15

JPA query of a Set of terms

of SearchTerm objects. ie. Set terms;     // the set is filled with SearchTerm objects ... : Set terms; // the set is filled with SearchTerm objects
Manual
15

BIRT/ODA ObjectDB Driver

Tools (BIRT) that adds support of ObjectDB as a data source and JPQL as a data set query language ... Sets and JPQL To create the data set: Open the [New Data Set] dialog box by right clicking the Data Sets node in the [Data Explorer] window and selecting New Data Set. Select an ObjectDB data source
Manual
15

Locking in JPA

- which represents an exclusive lock. Setting a Pessimistic Lock An entity object can be locked ... can be set to allow waiting for a pessimistic lock for a specified number of milliseconds. The hint can be set in several scopes: For the entire persistence unit - using a persistence.xml property
Forum
15

@ElementCollection Set<Integer> is emptied sometimes

already. ObjectDB seems to clear some fields that are @ElementCollection Set of my objects ... null. So, my @ElementCollection Set fields become empty sometimes during development ... it. Initially, I was not using @ElementCollection on my Set fields from User class. I've seen
Forum
15

Safe Settings

Hi, I am trying to set up ObjectDb in a safe way that allows turning the machine off while database ... with both configuration settings with the debugger and I put a breakpoint in FileDescriptor#sync(). It never got triggered with no setting that I could come up with. How come? Thanks in advance
Forum
15

best practice for configuration settings

to our core process, each accessing objectdb. What is the best setting ? synchronized there is no documentation about this setting, what does it do/mean ? With 16 processor cores the optimum ... testing and comparing different settings under the real conditions. If synchronized is true
Forum
15

NullPointerException while setting a new property value

to entities from 2 threads: 1. Creating a list of entities, default values are set from imported file 2 ... (); } } 3. The code continues with a revalidation and re-setting some properties to entities from