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102

Maven and multiple JARs

Maven and multiple JARs
102

Access to client/server database from multiple applications

Access to client/server database from multiple applications
102

Issue with orphanRemoval and multiple EntityManagers

Issue with orphanRemoval and multiple EntityManagers
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Index Definition

A composite index is an index on more than one persistent field. It is defined by specifying multiple fields ... . Multiple @Index annotations can be wrapped with an @Indices annotation: @Entity @Indices ... , the @Uniques annotation can wrap multiple @Unique annotations. As shown above, the members attribute
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What are the main benefits of using ObjectDB?

that ability and require multiple tables, multiple records and join operations in order to support multiple values (even for a simple data structure such as a collection of strings). In addition
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JPA Lifecycle Events

but no more than one callback method for the same event. However, the same method may be used for multiple callback ... @EntityListeners(MyListener.class) public class MyEntityWithListener { } Multiple listener classes ... If more than one callback method has to be invoked for a lifecycle event (e.g. from multiple
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FROM clause (JPQL / Criteria API)

name annotation element. Multiple range variables are allowed. For example, the following query ... WHERE c2 MEMBER OF c1.neighbors Multiple variables are equivalent to nested loops in a program ... . Caution is required when using multiple range variables. Iteration over about 1,000,000 database objects
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SELECT clause (JPQL / Criteria API)

propagated to the database. Multiple SELECT Expressions The SELECT clause may also define composite ... with multiple SELECT expressions, where custom result objects can provide an object oriented ... - multiselect, which takes a variable number of arguments representing multiple selections, and builds
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Database Management Settings

the command line. Every machine requires a specific activation code, but multiple <activation> elements can be specified in the same configuration. This way the same configuration file (with multiple activation codes) can be used on multiple machines. Note: If you are using an ObjectDB OEM license
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[ODB1] Chapter 7 - JDOQL Queries

. A semicolon at the end of the string is optional. Multiple variables are required ... = (Collection)query.execute(date); Multiple import statements can also be declared: query ... (...) is expected to use the Java syntax for import statements. Multiple import statements

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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