<local-cache name="myCustomStore">
   <persistence passivation="false">
      <store
         class="org.acme.CustomStore"
         fetch-state="false" preload="true" shared="false"
         purge="true" read-only="false" segmented="true">

         <write-behind modification-queue-size="123" />

         <property name="myProp">${system.property}</property>
      </store>
   </persistence>
</local-cache>
