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46

General Performance Issues Illustrated with a Specific Method

.Serializable; import java.util.Date; import javax.jdo.annotations.Index; import javax.persistence ... ) private Long id; private static final long serialVersionUID = 1L; @Index @OneToOne(cascade = CascadeType.ALL,fetch = FetchType.EAGER) private Person person; @Index
31

Unexpected exception during open the database

, when indexes require updates. support Support The issue is not related to Issue #1860. It occurs ... .dmos.RenamedTestImpl"/> </package> </schema> @Entity public class RenamedTestImpl { ... @Index private String scopeID; ... } if we remove the @Index annotation in the entity or we remove the schema
29

Query becomes slower on moving from ObjectDB 1.x to ObjectDB 2.x

an index is missing? It would help if you could upload a sample database and a simple test program ... the query. binitbhaskar Binit Bhaskar In the database that you uploaded there is an index on field logEntryId, which is inactive. An inactive index is usually the result of adding a new index
5

javax.persistence.criteria.ListJoin

testing for membership Since: JPA 2.0 Expression<Integer> index() Create an expression that corresponds to the index of the object in the referenced association or element collection. Create an expression that corresponds to the index of the object in the referenced association or element collection
1

Step 7: Run the Spring Web App

At this stage your project should have the following structure: Use copy and paste to replace the content of the index.jsp file (which serves as the default front page) with the following redirection to the controller path: <jsp:forward page="guest.html" /> Assuming that Tomcat 6.0 is installed
0

javax.jdo.annotations.Element

String index The name of the index to generate. The name of the index to generate. Returns: the name of the index Default value: "" Since: JDO 2.1 String indexed Whether the value column(s) should be indexed. Whether the value column(s) should be indexed. Returns: whether the value column(s
0

javax.jdo.annotations.Value

2.1 String index The name of the index to generate. The name of the index to generate. Returns: the name of the index Default value: "" Since: JDO 2.1 String indexed Whether the value column(s) should be indexed. Whether the value column(s) should be indexed. Returns: whether the value column(s
0

javax.jdo.annotations.Join

assume a primary key constraint Default value: "" Since: JDO 2.1 String index The name of the index to generate. The name of the index to generate. Returns: the name of the index Default value: "" Since: JDO 2.1 String indexed Whether the join column is indexed. Whether the join column is indexed
0

javax.jdo.annotations.Key

a foreign key constraint Default value: "" Since: JDO 2.1 String index The name of the index to generate. The name of the index to generate. Returns: the name of the index Default value: "" Since: JDO 2.1 String indexed Whether the value column(s) should be indexed. Whether the value column(s
0

javax.jdo.annotations.Version

: the vendor extensions Default value: {} Since: JDO 2.1 String indexed Whether the version column(s) is(are) indexed. Whether the version column(s) is(are) indexed. Returns: whether the version column(s) is(are) indexed Default value: "" Since: JDO 2.1 VersionStrategy strategy Strategy

Getting Started

ObjectDB is very easy to use. Follow the Getting Started Tutorial and the Quick Tour manual chapter and in minutes you may be able to write and run first Java programs against ObjectDB.

Prior knowledge or experience in database programming (SQL, JDBC, ORM, JPA, etc.) is not required, but some background in using the Java language is essential.

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