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Difference between revisions of "EclipseLink/UserGuide/JPA/Basic JPA Development/Mapping/Basic Mappings/Lazy Basics"
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When using a one-to-one or many-to-one mapping in a Java SE environment that does not permit the use of <tt>-javaagent</tt> on the JVM command line, to configure EclipseLink JPA to perform lazy loading when annotation attribute <tt>fetch</tt> is set to <tt>javax.persistence.FetchType.LAZY</tt>, you can use static weaving. | When using a one-to-one or many-to-one mapping in a Java SE environment that does not permit the use of <tt>-javaagent</tt> on the JVM command line, to configure EclipseLink JPA to perform lazy loading when annotation attribute <tt>fetch</tt> is set to <tt>javax.persistence.FetchType.LAZY</tt>, you can use static weaving. | ||
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Latest revision as of 11:01, 19 December 2012
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Key API
Lazy Loading
JPA specifies that lazy loading is a hint to the persistence provider that data should be fetched lazily when it is first accessed, if possible.
If you are developing your application in a Java EE environment, you only have to set fetch to javax.persistence.FetchType.LAZY, and EclipseLink persistence provider will supply all the necessary functionality.
When using a one-to-one or many-to-one mapping in a Java SE environment, to configure EclipseLink JPA to perform lazy loading when the fetch attribute is set to FetchType.LAZY, configure either dynamic or static weaving.
When using a one-to-one or many-to-one mapping in a Java SE environment that does not permit the use of -javaagent on the JVM command line, to configure EclipseLink JPA to perform lazy loading when annotation attribute fetch is set to javax.persistence.FetchType.LAZY, you can use static weaving.