Class DerbyNetworkServerDataStoreHelper
- All Implemented Interfaces:
DataStoreHelper
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 |
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Field Summary
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
ConstructorsConstructorDescriptionThisDerbyNetworkServerDataStoreHelperconstructor creates a newDerbyNetworkServerDataStoreHelperbased on theDataStoreHelperproperties provided. -
Method Summary
Modifier and TypeMethodDescriptionvoidThis 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, setUserDefinedMapMethods inherited from class com.ibm.websphere.rsadapter.GenericDataStoreHelper
calcPartitionNumber, doConnectionCleanup, doConnectionCleanupPerCloseConnection, doConnectionCleanupWithValidCheck, doConnectionSetup, doConnectionSetupPerGetConnection, doConnectionSetupPerTransaction, getLockType, getMetaData, getPasswordForUseWithTrustedContextWithAuthentication, getPrintWriter, getResultSetConcurrency, getResultSetType, getXAExceptionContents, hasLostUpdateOrDeadLockOccurred, isBatchUpdateSupportedWithAccessIntent, isConnectionError, isDuplicateKey, isTransientConnectionError, isUnsupported, mapException, modifyXAFlag, setConfig, showLockInfo
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Constructor Details
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DerbyNetworkServerDataStoreHelper
ThisDerbyNetworkServerDataStoreHelperconstructor creates a newDerbyNetworkServerDataStoreHelperbased on theDataStoreHelperproperties 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-DataStoreHelperproperties.
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Method Details
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doStatementCleanup
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
DerbyDataStoreHelperresets all of the statement properties listed above except for thecursorNameproperty.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:
doStatementCleanupin interfaceDataStoreHelper- Overrides:
doStatementCleanupin classDerbyDataStoreHelper- Parameters:
stmt- the PreparedStatement.- Throws:
SQLException- if an error occurs cleaning up the statement.
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