EclipseLink/UserGuide/JPA/Basic JPA Development/Caching/Indexes

EclipseLink JPA

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Key API

• @CacheIndex
• @CacheIndexs

Native API

• CachePolicy
• CacheIndex

Cache Indexes

Expiry can also be used in the query results cache (see Query Results Cache).

Cache index annotation example

...
@Entity
@Cache(
  expiry=600000 // 10 minutes
)
public class Employee {
  ...
}

...
@Entity
@Cache(
  expiryTimeOfDay=@TimeOfDay(hour=3) // 3:00 AM
)
public class Project {
  ...
}

Cache index XML example

<?xml version="1.0"?>
<entity-mappings
	xmlns="http://www.eclipse.org/eclipselink/xsds/persistence/orm"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://www.eclipse.org/eclipselink/xsds/persistence/orm http://www.eclipse.org/eclipselink/xsds/eclipselink_orm_2_4.xsd"
	version="2.4">
    <entity name="Employee" class="org.acme.Employee" access="FIELD">
        <cache>
            <expiry>600000</expiry>
        </cache>
    </entity>
    <entity name="Project" class="org.acme.Project" access="FIELD">
        <cache>
            <expiry-time-of-day hour="3"/>
        </cache>
    </entity>
</entity-mappings>

Version: 2.4 DRAFT
Other versions...

Cache Type and Size	Caching	Clustering and Cache Coordination
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