jdo

I am running DataNucleus enhancer from DOS as follows: java -cp C:\Users\Chania\workspace\myproject\war\WEB-INF\classes\;C:\repo\datanucleus-full-3.1.0-release\lib\datanucleus-enhancer-3.1.0-release.jar;C:\repo\datanucleus-full-3.1.0-release\lib\datanucleus-core-3.1.0-release.jar;C:\repo\datanucleus-full-3.1.0-release\deps\jdo-api-3.1-SNAPSHOT-20110926.jar;C:\repo\datanucleus-full-3.1.0-release\lib\datanucleus-api-jdo-3.1.0-release.jar;C:\repo\datanucleus-full-3.1.0-release\deps\log4j-1.2.14.jar;C:\repo\datanucleus-full-3.1.0-release\deps\asm-4.0.jar -Dlog4j.configuration=file:C:\repo

I use JDO within GAE to batch persist objects using the following method: public void makePersistent(PersistenceManager pm, List<Regeling> makePersistent) { Transaction tx = pm.currentTransaction(); try { // Start the transaction tx.begin(); // Persist to the datastore // pm.makePersistentAll(makePersistent); for (int i = 0; i < makePersistent.size(); i += BATCH_SIZE) { int last = i + BATCH_SIZE; last = last > makePersistent.size() ? makePersistent.size() : last; pm.makePersistentAll(makePersistent.subList(i, last)); pm.flush(); System.out.println("Made "+last+" items persistent."); } //

I am trying to build my first Google App Engine WAR and am setting up my own external (outside of Eclipse) Ant build to be executed from the terminal. I'm trying to get the <enhance_war/> Ant macro working and am running into a bizarre NoSuchMethodError . Here's my Ant target: <target name="package" depends="gendocs"> <echo message="Enhancing WAR JDO classes." /> <enhance_war war="war" /> <echo message="Packaging the WAR file." /> <war destfile="gen/dist/myapp.war" webxml="war/web.xml"> <fileset dir="war"> <includes name="**/*.xml" /> </fileset> <lib dir="war/WEB-INF/lib" /> <classes dir="war

This further to my previous question on handling large numbers of objects in BigTables/JDO. Assuming a TransactionAccount could end up with as many as 10,000 objects in its transactions list, how does this work with Goodle app engine? How do you add objects to such a large list without the whole list being loaded into memory? (The assumption is that 10,000 objects shouldn't be loaded into memory?) I am not trying to ask you how to do my homework, I just have no idea where to start to solve this, the app engine documentation and google searching is not helping :( // example only, not meant to

I'm trying to find a way to accomplish a xsd schema to datastore roundtrip, with minimum effort. I used jaxb to build my object model from schemas, now I would like to store these objects based on JPA (or JDO or something else?). Is it possible, to auto enhance the objects with the missing annotations based on the JAXB Annotations? Is it desirable? Thanks You have several options for this use case. Option #1 - Hyperjaxb3 I have not used this myself, but Hyperjaxb3 is supposed to generate both JAXB and JPA annotations on the model: http://confluence.highsource.org/display/HJ3/Home Option #2 -

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 I did. I didn't really do anything special in these implementations, in fact I just used Eclipse to generate them. Like so: @PrimaryKey @Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY) private Long id; @Persistent private String appleId; @Override public int hashCode() { final int prime = 31; int result = 1; result = prime * result + ((appleId == null) ? 0 : appleId.hashCode()); return