ReadObjectFromCoherence (Oracle Fusion Middleware Java API Reference for Oracle TopLink)

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, Serialized Form

Field Summary

Fields inherited from class oracle.eclipselink.coherence.integrated.internal.querying.CoherenceRedirector
`filterFactory, namedCache, shouldTranslatePKs, translationDelegate`

Constructor Summary
`ReadObjectFromCoherence()`

Method Summary
`java.lang.Object`	`invokeQuery(DatabaseQuery query, Record arguments, Session session)` REQUIRED: Perform the query.

Methods inherited from class oracle.eclipselink.coherence.integrated.internal.querying.CoherenceRedirector
`getFilterFactory, getNamedCache, getTranslationFailureDelegate, shouldTranslatePKs`

Methods inherited from class java.lang.Object
`clone, equals, finalize, 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.