com.ibm.websphere.rsadapter

Class DerbyNetworkServerDataStoreHelper

java.lang.Object

com.ibm.websphere.rsadapter.GenericDataStoreHelper

com.ibm.websphere.rsadapter.DerbyDataStoreHelper

com.ibm.websphere.rsadapter.DerbyNetworkServerDataStoreHelper

All Implemented Interfaces:

DataStoreHelper

public class DerbyNetworkServerDataStoreHelper
extends DerbyDataStoreHelper

DerbyNetworkServerDataStoreHelper is a DataStoreHelper implementation customized for the Derby database when running using the Derby NetworkServer framework. When mapping a SQLException, the SQLException mappings from the DerbyNetworkServerDataStoreHelper and DerbyDataStoreHelper are searched first, and subsequently, if no match is found, the SQLException mappings from the GenericDataStoreHelper are searched. If you have additional requirements on Derby you should consider subclassing this implementation.
Note: This class and its methods can not be called or referenced directly by user applications.

SQLException mappings specific to the DerbyNetworkServerDataStoreHelper are the following:

Error Code	SQL State	PortableSQLException subclass
-4499		StaleConnectionException.class

Since:

WAS 5.0.2

Field Summary

Fields inherited from class com.ibm.websphere.rsadapter.DerbyDataStoreHelper

derbyErrorMap, derbyTc

Fields inherited from class com.ibm.websphere.rsadapter.GenericDataStoreHelper

customDefinedWasDefaultIsoLevel, defaultQueryTimeout, EOLN, genErrorMap, resBundle, tranErrorList

Fields inherited from interface com.ibm.websphere.rsadapter.DataStoreHelper

CLOUDSCAPE_HELPER, CLOUDSCAPE_NETWORK_SERVER_HELPER, CONNECTJDBC_HELPER, CUSTOM_HELPER, DATADIRECT_HELPER, DB2_390_HELPER, DB2_390_LOCAL_HELPER, DB2_400_HELPER, DB2_HELPER, DB2_UNIVERSAL_HELPER, DERBY_HELPER, DERBY_NETWORK_SERVER_HELPER, FIRST_TIME_CALLED, GENERIC_HELPER, INFORMIX_HELPER, INFORMIX_JCC_HELPER, MSSQL_HELPER, ORACLE_10G_HELPER, ORACLE_11G_HELPER, ORACLE_HELPER, POTENTIAL_DEADLOCK, POTENTIAL_LOST_UPDATE, PROXY_DS_HELPER, SEQUELINK_HELPER, SUBJECT, SYBASE_HELPER, SYBASE11_HELPER, TX_REPEATABLE_READ_FORUPDATE, TX_SERIALIZABLE_FORUPDATE, UNDEFINED_HELPER, UNDEFINED_ISOLATOIN_LEVEL, UPDATE_ON_READONLY

Constructor Summary

Constructors

Constructor and Description
DerbyNetworkServerDataStoreHelper(java.util.Properties props) This DerbyNetworkServerDataStoreHelper constructor creates a new DerbyNetworkServerDataStoreHelper based on the DataStoreHelper properties provided.

Method Summary

Methods

Modifier and Type	Method and Description
void	doStatementCleanup(java.sql.PreparedStatement stmt) This method cleans up a statement before the statement is returned to the statement cache.

Methods inherited from class com.ibm.websphere.rsadapter.DerbyDataStoreHelper

findMappingClass, getIsolationLevel, getResultSetConcurrency, setUserDefinedMap

Methods inherited from class com.ibm.websphere.rsadapter.GenericDataStoreHelper

calcPartitionNumber, doConnectionCleanup, doConnectionCleanupPerCloseConnection, doConnectionCleanupWithValidCheck, doConnectionSetup, doConnectionSetupPerGetConnection, doConnectionSetupPerTransaction, getLockType, getMetaData, getPasswordForUseWithTrustedContextWithAuthentication, getPrintWriter, getResultSetType, getXAExceptionContents, hasLostUpdateOrDeadLockOccurred, isBatchUpdateSupportedWithAccessIntent, isConnectionError, isDuplicateKey, isTransientConnectionError, mapException, modifyXAFlag, setConfig, showLockInfo

Methods inherited from class java.lang.Object

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

Constructor Detail

DerbyNetworkServerDataStoreHelper

public DerbyNetworkServerDataStoreHelper(java.util.Properties props)

This DerbyNetworkServerDataStoreHelper constructor creates a new DerbyNetworkServerDataStoreHelper based on the DataStoreHelper properties provided. All implementations inheriting from a data store helper must supply this same list of properties to their super class by invoking the constructor of their super class with the list of properties.

Parameters:

props - DataStoreHelper properties.

Method Detail

doStatementCleanup

public void doStatementCleanup(java.sql.PreparedStatement stmt)
                        throws java.sql.SQLException

This method cleans up a statement before the statement is returned to the statement cache. This method is called only for statements that will be cached. It is called only if at least one of the following statement properties has changed,

• cursorName
• fetchDirection
• maxFieldSize
• maxRows
• queryTimeout

DerbyDataStoreHelper resets all of the statement properties listed above except for the cursorName property.

The following operations do not need to be included in the statement cleanup since they are automatically performed by WebSphere when caching statements,

• setFetchSize(0)
• clearParameters()
• clearWarnings()

A helper class implementing this method may choose to do additional cleanup for the statement. However, this should never include closing the statement, since the statement is intended to be cached.

Specified by:

doStatementCleanup in interface DataStoreHelper

Overrides:

doStatementCleanup in class DerbyDataStoreHelper

Parameters:

stmt - the PreparedStatement.

Throws:

java.sql.SQLException - if an error occurs cleaning up the statement.