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[ODB1] Chapter 5 - JDO Connections

The PersistenShows how to use database connections and transactions in JDO. ceManagerFactory interface represents a factory of database connections. Its main role is to provide PersistenceManager instances. The PersistenceManager interface represents a database connection. Every operation on a database requires a PersistenceManager instance. The Transaction interface represents a transaction on a database. Every operation that modifies the content of the database requires an active transaction.[toc hidden:1] This chapter describes three essential interfaces for using JDO: 5.1  javax.jdo.PersistenceManagerFactory 5.2  javax.jdo.PersistenceManager 5.3  javax.jdo.Transaction The PersistenceManagerFactory ...

 
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Mismatch client-server protocol prefix

Hello! We migrated one of our legacy webservices to Spring Boot/Spring MVC. Now i have a strange problem. At first the app runs perfectly for a couple of hours. After that it stops working and I get the following exception: ... <database > ... <processing cache = "64mb" max-threads = "1" synchronized = "true" /> ...

 
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Pre-detach loading: retrieval by navigation not working in if statement

objectdb-2.6.3_04 JDK1.7 VM option at runtime: -javaagent:lib/objectdb.jar Experimental mode: objectdb.temp.no-detach NOT USED ... .sig files, rather than .class files, to the NetBeans cache, and side-steps any build.xml commands) I can easily apply the ObjectDB ...

 
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Dependency from enhanced classes to the objectDB library

Hello, we have a Question to the dependency from enhanced classes (required for license) to the objectDB library.... error occurred. This form was missing from the server cache. Try reloading the page and submitting again.   And ...

 
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Master database switching to read-only mode, possibly caused by slave failure

We had a database failure causing a production outage. Both master and slave databases have failed, slave became unresponsive and the master switched to read-only mode. By the look of it the slave database failed first and possibly caused the master to switch to read-only mode. The sequence of events was: ... was closed. Maybe some read operations still work due to cache on the client side? i.e. is it possible that the server didn't just ...

 
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Insertion Speed Rate and Batch Load

1. I got about 10K inserts / second, is it normal? I would expect more than that, like close to 100K/second. I can definitely do 80K inserts/seconds on Oracle with batch insert on table with one primary key. 2. Is batch update/insert operation supported? I attached the files. ... = "true" reflection = "warning" /> <cache ref = "weak" level2 = "0" /> <cascade-persist ...

 
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Problem to use find method on an abstract Class: AbstractMethodError is thrown

Hi, I'm using JBoss AS 7 WildFly with ObjectDB installed as a module ( also Java 7, Eclipse Juno) In my db there are objects of type SentenceStatement which inherit from type LogicalObject  When I use find method mentioning SentenceStatement everything works just fine but when I use this method mentioning LogicalObject I get AbstractMethodError Please see services.Tester class with the 2 options for a better ease    this is the stack trace when I try to find LogicalObject: ... 2, -122, 72, 57, -75, 27, -101, -10, 21, -89, 14, 97]} in cache 08:17:32,897 ERROR [org.jboss.ejb3.invocation] ...

 
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Spring Data JPA

Hello! When i configure Spring Data JPA to use ObjectDB 2.4.0_03 i get an exception when the context starts. #1 2012-05-26 22:55 Hello! When i configure Spring Data JPA to use ObjectDB 2.4.0_03 i get an exception when the context star ...

 
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OneToMany and cascade delete problem

Hi, I don't really know if this is a bug or maybe model that I make is bad. I have a problem with with two different classes with OneToMany relation to one, shared class. For example (first class): @Entity public static class Store { @OneToMany(targetEntity = Offer.class, mappedBy = "store") private List<Offer> offers; } second class: ... intensively, so Product instances are removed from the cache and then retrieved again, fixing the broken relationship). When ...

 
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ObjectDB can't be activated

Hello, we are trying to activate objectdb on a virutalized debian 7 server, but do not have any success. Steps we made to activate the server: ... 13:22 Maybe it is a cache problem. Anyway, I see an activation now from a few minutes ago. ...