com.bankframe.ei.txnhandler.persister
Class CacheIndexPersister

java.lang.Object
  |
  +--com.bankframe.ei.txnhandler.persister.TxnPersister
        |
        +--com.bankframe.ei.txnhandler.persister.CacheIndexPersister

All Implemented Interfaces:

EPersister, TxnHandlerBrokerPersister

Direct Known Subclasses:

MasterEntityPersister

public class CacheIndexPersister

extends TxnPersister

Transaction Handler Persister that can use an indexable cache.

Constructor Summary

CacheIndexPersister()
Default constructor

Method Summary

java.util.Vector	amend(java.lang.String ejbName, java.lang.String methodName, DataPacket data, java.util.Vector primaryKeys, boolean removeOperation) This method is used to update some or all attributes in the data store.
java.util.Enumeration	find(EBMPEntity entityBean, java.lang.String methodName, DataPacket finderData) This method is used to find an entity in the data store.

Methods inherited from class com.bankframe.ei.txnhandler.persister.TxnPersister

amend, amend, amend, amend, create, find, load, remove, removeFromCache, store

Methods inherited from class java.lang.Object

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

Constructor Detail

CacheIndexPersister

public CacheIndexPersister()

Default constructor

Method Detail

find

public java.util.Enumeration find(EBMPEntity entityBean,
                                  java.lang.String methodName,
                                  DataPacket finderData)
                           throws ProcessingErrorException

This method is used to find an entity in the data store. It overrides a method in the superclass. The PersisterTxnMap values are used to determine if a cache is used for a given entityName and methodName. If a cache is not used, then the Transaction Handler is invoked to build and fire a host transaction. When a PersisterTxnMap indicates that the cache can be used to retrieve data then this method will check if an index should be used, or look up the cache by primary key. In either case, if no entry is found in the cache then a Transaction Handler is invoked.

Specified by:

find in interface EPersister

Overrides:

find in class TxnPersister

Parameters:

entityBean - entity to be found in the data store

Returns:

Enumeration returns an enumeration of primaryKeys

Throws:

ProcessingErrorException - thrown if an error occurs during processing

amend

public java.util.Vector amend(java.lang.String ejbName,
                              java.lang.String methodName,
                              DataPacket data,
                              java.util.Vector primaryKeys,
                              boolean removeOperation)
                       throws ProcessingErrorException

This method is used to update some or all attributes in the data store. It overrides a method from the superclass. The additional step performed in this method is that after storing the response in the main cache, any relevant cache indices are updated also.

Specified by:

amend in interface TxnHandlerBrokerPersister

Overrides:

amend in class TxnPersister

Parameters:

ejbName - is the name of the entity to be updated in the data store

data - the amend data

primaryKeys - The primary keys to amend/remove from the cache

removeOperation - True if the operation involves removing data from the host false otherwise

Returns:

Vector of results from the host system, used if this is a session amend call to the host system

Throws:

ProcessingErrorException - thrown if an error occurs during processing