About empty

forum_thread

Java 9 support

Hi,  is ObjectDB supporting Java 9 already ? If not when can we expect the support for it ? ... What are the expected implications of an empty org.springframework.orm.jpa.vendor.AbstractJpaVendorAdapter class? ...

 
manual

[ODB1] Chapter 7 - JDOQL Queries

Explains how to use JDOQL, the Java/JDO Query Language.... A Query instance can even be constructed by an empty newQuery() form: Query newQuery ( ) ; ...

 
forum_thread

Failover from Master to Slave

Good morning! I am interested in ObjectDB for a client project I am currently working on. In order to evaluate your tool I would like to know if your product has the ability to failover from a Master Database to a Slave Database and then recover back to the master when the master comes back online. I don't see any documentation about automatic failover.   Thanks Rich   ... Possible solution is to create a marker file (even empty) on the master server file system and on failure to delete that file and ...

 
manual

[ODB1] Chapter 4 - JDO Metadata

Shows how to define JDO metadata for persistence capable classes.... field, "" for a java.lang.String field, empty collection, 0 size array, and so on). primary-key The ...

 
forum_thread

Replication issue, Replayer failing due to NullPointerException.

I'm getting replication errors and upon trying to play the replayer I get a NullPointerException which i'm also seeing in the slave logs when it's trying to replicate... ... worth noting that some of the databases may be totally empty(no objects persisted) when trying to replicate. I'm going to ...

 
manual

Literals in JPQL and Criteria Queries

Describes literals in JPQL, including null, false, true, numbers, strings, dates enums and types.... See JavaDoc Reference Page... <String> empty = cb. literal literal(value) CriteriaBuilder's method ...

 
forum_thread

GWT RPC is throwing serialization exception when I have object db date value

Caused by: com.google.gwt.user.client.rpc.SerializationException: Type 'objectdb.java.util.Date' was not included in the set of types which can be serialized by this SerializationPolicy or its Class object could not be loaded. For security purposes, this type will not be serialized.: instance = Sat Jan 29 00:00:00 PST 2011    at com.google.gwt.user.server.rpc.impl.ServerSerializationStreamWriter.serialize(ServerSerializationStreamWriter.java:614)  ... (which is no problem), otherwise the List will alway be empty after detaching. @ OneToMany ( fetch = ...

 
forum_thread

Should derived fields of an EmbeddedId be manually maintained by app code?

If I have an Entity which has a primary key which is derived and I am implementing it using @EmbeddedId, am I responsible for maintaining the derived fields of the @EmbeddedId? I could not find anything in the JPA 2.0 spec http://download.oracle.com/auth/otn-pub/jcp/persistence-2.0-fr-oth-JSpec/persistence-2_0-final-spec.pdf?e=1317047713&h=54831c176e81a244a4c309e13eba0b27 which tells me what to expect. ... protected EContainer ( ) { // Empty constructor for JPA }   public void ...

 
issue

Issue with UPPER ?

Hi, Assuming those queries which are all the same except the UPPER calls: ... satisfy:   ($4.name!=null). [Step 8a3f] Prepare an empty result set. [Step 8b] Filter the results of step 8a retaining only ...

 
forum_thread

type.loader java.lang.ClassNotFoundException

ObjectDB objectdb-2.2.5_03 in client-server mode Netbeans ID6.9.1 Glassfish3.0.1 With server logging turned on I get the following error message for many (or all) encountered classes: ... in lower logging level (e.g. info ). The empty database might be the result of another issue - please try to isolate the ...