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Questions tagged [jdo]

Java Data Objects (JDO) is a standard way to access persistent data in databases, using plain old Java objects (POJO) to represent persistent data. It is designed to be datastore-agnostic, allowing persistence to, potentially, any type of datastore

Java Data Objects (JDO) is a Java specification for accessing, persisting, and managing data between Java objects / classes and a datastore. JDO 1.0 (2002) defined the basic API, JDO 2.0 (2006) included a comprehensive definition of ORM as well as other enhancements, and JDO 3.0 (2009) added on annotations, as well as APIs for fetch groups and metadata. It is the most complete specification for Java persistence around

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AppEnginge JAVA SetOrdering Funaction is not working

AppEnginge JAVA SetOrdering Funaction is not working Messages.java @PersistenceCapable public class Messages{ @PrimaryKey @Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY) private Long id; @Persistent String name; @Persistent String…
user3086127
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google App engine datastore via JPA and JDO

What jar are files needed for Google App engine datastore via JPA and JDO?
user246160
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JDO Exception when using Query::executeWithMap(Map parameters) method

I'm composing a dynamic SQL query that contains named parameters, one of the them is signerName. It's used in the query as the following: "LOWER(`CG_TRANSACTIONSIGNER`.`FIRSTNAME`) LIKE :signerName" When setting the parameter as…
ahmehri
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how does we enhance presistent class

AS I am new to JDO and datastore I have set up a simple Google App Engine project based on Spring Framework to Perform Basic CRUD operation. When I run my Application Its Show's Persistent class "Class com.pandian.model.Customer does not seem to…
user2742540
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gae cloud endpoint api jdo query filter email not supported

I am writing a cloud endpoint api using JDO to fetch a list of users based on the emailid. I am passing email id as a @Named parameter to the email and adding it to the query filter and i get the error message "Unexpected expression type while…
Vanitha R
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Retrieve serialized in Appengine JDO

My table in my appengine app has a field called "fields". this fields is a String[] in my Employee persistence object @Persistent @Serialized private String[] fields; The user search for multiple fields (i.e field1,field2 etc') and i want to search…
shbeita
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Why do I get "Persistence Manager has been closed" exception

My application various pieces occasionaly throw following exception Javax.jdo.JDOFatalUserException: Persistence Manager has been closed at org.datanucleus.jdo.JDOPersistenceManager.assertIsOpen(JDOPersistenceManager.java:2125) at…
Vik
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Fetch join in JDO

In JPA fetch join, you can get the entity and its associated entities in one native SQL query. Is there a way to do similar in JDO? I'm using DataNucleus implementation.
Bewang
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GAE GWT JDO persistent List does not save/load correctly

I'm worring about JDO in GAE (Google App Engine). (GWT 2.4 and GAE 1.6.3 SDK and JDO 2.3) I have a class "Users" which should save a Collection of "User" in a List, but it doesn't work. When i save my Users-Class, then it creates the "Users"-Object…
Sam
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GQL of GoogleAppEngine doesn't work in Java code

I've a little problem with GQL for GoogleAppEngine. If i execute this query on my Datastore: SELECT * FROM CoursePO ORDER BY createdDate DESC LIMIT 4; it correctly shows me the response with maximum 4 results (tuple whatever as you want..). When i…
Aerox
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JDO basics: List or array won't retrieve or return with GWT RPC

I've been using Objectify up till now, but now I have to deal with some code using JDO. I'm having problems with basic stuff that is easy with Objectify, specifically: if an object has either a List or an array as a member, I can't get that to…
timmacp
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