oracle.eclipselink.coherence.integrated.querying

Class ReadObjectFromCoherence

java.lang.Object

CoherenceRedirector

oracle.eclipselink.coherence.integrated.querying.ReadObjectFromCoherence

All Implemented Interfaces:

java.io.Serializable, QueryRedirector

public class ReadObjectFromCoherence
extends CoherenceRedirector
implements QueryRedirector

Purpose: This Query Redirector should be set on any class or query where the user wants Coherence to be checked for data instead of the database and CoherenceInterceptor has been set on the Descriptor. With this Redirector set TopLink will not issue any SQL for Reads unless the query can not be translated into a Coherence filter. And primary key queries will only access Coherence once for each query. Developers should set the Coherence Cache name that corresponds to this class in a descriptor property called "coherence.cache.name". Each class should have its own Cache unless the PK's of the instances are unique amoung all classes stored in a single cache This Redirector can be set on the class descriptor through a Session or Descriptor customizer or annotations. This Redirector may be used on a per query basis as well.

Since:

Oracle TopLink 11g (11.1.1.0.0)

Author:

Gordon Yorke

See Also:

setDefaultInsertQueryRedirector(QueryRedirector), QueryRedirectors

Constructor Summary

Constructors

Constructor and Description
ReadObjectFromCoherence()

Method Summary

Methods

Modifier and Type	Method and Description
java.lang.Object	invokeQuery(DatabaseQuery query, Record arguments, Session session) REQUIRED: Perform the query.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ReadObjectFromCoherence

public ReadObjectFromCoherence()

Method Detail

invokeQuery

public java.lang.Object invokeQuery(DatabaseQuery query,
                           Record arguments,
                           Session session)

Description copied from interface: QueryRedirector

REQUIRED: Perform the query. This must execute the query base on the arguments and return a valid result for the query.

Specified by:

invokeQuery in interface QueryRedirector