jdo Questions
5
Solved
I am developing a desktop app with Datanucleus and JDO for embedded H2 database. It all works fine when I run it from Eclipse, but it stops working when I try to make executable jar out of it. I ge...
Magnus asked 10/4, 2012 at 21:33
5
Solved
3
Solved
I have an application deployed in Google app engine. I am getting inconsistent data when i fetch an entity by id immediately after updating that entity. I'm using JDO 3.0 to access the app engine d...
Sibeal asked 15/10, 2014 at 7:58
3
Solved
I am using Hbase-Hadoop combination for my application along with Data Nucleus as the ORM.
When I am trying to access Hbase via several threads at a single time, it throws exceptions as:
Exception ...
Waynewayolle asked 9/2, 2012 at 15:17
4
Solved
I am using jdo and configuring the persistence manager with jdoconfig.xml
However everywhere I find documentation about jdoconfig.xml it states that http://java.sun.com/xml/ns/jdo/jdoconfig should...
5
Solved
want to develop my project on Google App Engine .I want to use google big table as database. For the database I have two options JPA and JDO. Will you guys please suggest me on it? Both are new for...
10
Solved
Data Access Objects (DAOs) are a common design pattern, and recommended by Sun. But the earliest examples of Java DAOs interacted directly with relational databases -- they were, in essence, doing ...
Promethean asked 4/9, 2009 at 10:26
8
Solved
Since I updated today to GAE 1.7.2.1, I'm having validation errors in eclipse in all my jdoconfig.xml files.
I have the default jdoconfig.xml content :
[...]
<jdoconfig xmlns="http://java.sun....
Stammer asked 29/9, 2012 at 16:46
2
Solved
I'm trying to setup jdo/jpa in Android Studio and havefollowed an answer from a previous question here.
When I attempt to run the enhance task I get:
Error:Execution failed for task ':backend:app...
Cantal asked 26/5, 2014 at 23:55
3
I'm using Goole App Engine to Build my REST API, I've already marked my class as PersistenceCapable and also i got defined my @PrimaryKey and also marked as @Persistent(valueStrategy = IdGeneratorS...
Proletariat asked 20/2, 2013 at 2:56
2
I'm trying to create a simple test using JDO with App Engine and a Maven configuration.
My compile and data enhancement steps succeed. But at runtime (both mvn:test and appengine:devserver) I get:...
Extinct asked 2/2, 2013 at 8:16
1
I'm using Eclipse 3.7 (OSGI), and i can do the manual Enhancement (with the Datanucleus Eclipse Plugin & datanucleus-enhancer-2.1.0-release imported as plugin dependency)
I'm trying now to use...
Shipload asked 5/11, 2013 at 16:27
1
Solved
I use JDO within GAE to batch persist objects using the following method:
public void makePersistent(PersistenceManager pm,
List<Regeling> makePersistent) {
Transaction tx = pm.currentTra...
Sorry asked 19/10, 2013 at 8:58
7
Solved
There are four high level APIs to access Cassandra and I do not have time to try them all. So I hoped to find somebody who could help me to choose the proper one.
I'll try to write down my f...
Agnew asked 8/3, 2011 at 11:58
4
Solved
I've got an app in Google App Engine that was working fine. I realized that one on of my JDO-enhanced objects that I forgot to implement equals and hashCode (I need to use the object in a set). So ...
Expendable asked 29/10, 2009 at 5:1
1
I'm using JDO 2.3 on app engine. I was using the Master/Slave datastore for local testing and recently switched over to using the HRD datastore for local testing, and parts of my app are breaking (...
Appalachia asked 27/11, 2012 at 5:52
12
Solved
I want to develop my project on Google App Engine with Struts2. For the database I have two options JPA and JDO. Will you guys please suggest me on it? Both are new for me and I need to learn them....
Bayless asked 13/9, 2009 at 16:57
1
I am trying to use the org.springframework.orm.jdo.TransactionAwarePersistenceManagerFactoryProxy in my Spring project, but I am not sure how to use it or whether it's exactly what I am looking for...
Dex asked 31/1, 2013 at 22:18
4
Solved
I have a persistent class stored in a GAE datastore. I have removed one of the attributes from the class. The new records in this table show a value <none> for the removed attribute. But is ther...
Haymaker asked 16/5, 2011 at 9:30
6
I've just started learning Google Web Toolkit and finished writing the Stock Watcher tutorial app.
Is my thinking correct that if one wants to persist a business object (like a Stock) using JDO an...
2
Solved
Through appstats, I can see that my datastore queries are taking about 125ms (api and cpu combined), but often there are long latencies (e.g. upto 12000ms) before the queries are executed.
I can ...
Zymo asked 19/1, 2013 at 15:33
11
Solved
I'm familiar with ORM as a concept, and I've even used nHibernate several years ago for a .NET project; however, I haven't kept up with the topic of ORM in Java and haven't had a chance to us...
2
GWT has an Editor Framework, which, after a cursory inspection, looks an awful lot like how Spring MVC/Forms handles data binding between backend data objects and frontend UI components.
I am writ...
Tael asked 21/10, 2012 at 0:48
3
Solved
I am learning GAE and am getting a bit stuck. If I use the following, with a finally to make sure the persistence manager is closed, I get an exception when trying to actually read the Note objects...
Paba asked 13/7, 2010 at 23:1
1
Solved
I have a cross group transaction in app engine java jdo.
It works great on the local dev app engine server.
However, from unit testing, I get a java.lang.IllegalArgumentException: transactions on...
Gratulant asked 30/5, 2012 at 7:49
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