Package com.ibm.websphere.rsadapter
Class DB2UniversalDataStoreHelper
- java.lang.Object
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- com.ibm.websphere.rsadapter.GenericDataStoreHelper
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- com.ibm.websphere.rsadapter.DB2DataStoreHelper
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- com.ibm.websphere.rsadapter.DB2UniversalDataStoreHelper
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- All Implemented Interfaces:
DataStoreHelper
- Direct Known Subclasses:
InformixJccDataStoreHelper
public class DB2UniversalDataStoreHelper extends DB2DataStoreHelper
DB2UniversalDataStoreHelperis aDataStoreHelperimplementation customized for the DB2 Universal JDBC driver. When mapping aSQLException, theSQLExceptionmappings from theDB2UniversalDataStoreHelperare searched first. If no match is found, theSQLExceptionmappings from theDB2DataStoreHelperare searched. If still no match is found, theSQLExceptionmappings from theGenericDataStoreHelperare searched. If you have additional requirements on DB2 you should consider subclassing this implementation.
Note: This class and its methods can not be called or referenced directly by user applications.SQLExceptionmappings specific to theDB2UniversalDataStoreHelperare the following:Error Code SQL State PortableSQLExceptionsubclass-4498 StaleConnectionException.class-4499 StaleConnectionException.class-1776 StaleConnectionException.class
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Field Summary
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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
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Constructor Summary
Constructors Constructor Description DB2UniversalDataStoreHelper(java.util.Properties props)ThisDB2UniversalDataStoreHelperconstructor creates a newDB2UniversalDataStoreHelperbased on theDataStoreHelperproperties provided.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description voiddoStatementCleanup(java.sql.PreparedStatement stmt)This method cleans up a statement before the statement is returned to the statement cache.intgetDriverType()This method returns the driverType which is defined for the DB2 Universal JDBC driver.java.io.PrintWritergetPrintWriter()This method is used to obtain the log writer to set on theDataSourcewhen database logging is enabled (for example:WAS.database=all=enabled).-
Methods inherited from class com.ibm.websphere.rsadapter.DB2DataStoreHelper
doConnectionSetup, findMappingClass, getIsolationLevel, getLockType, getXAExceptionContents, setUserDefinedMap, showLockInfo
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Methods inherited from class com.ibm.websphere.rsadapter.GenericDataStoreHelper
calcPartitionNumber, doConnectionCleanup, doConnectionCleanupPerCloseConnection, doConnectionCleanupWithValidCheck, doConnectionSetupPerGetConnection, doConnectionSetupPerTransaction, getMetaData, getPasswordForUseWithTrustedContextWithAuthentication, getResultSetConcurrency, getResultSetType, hasLostUpdateOrDeadLockOccurred, isBatchUpdateSupportedWithAccessIntent, isConnectionError, isDuplicateKey, isTransientConnectionError, isUnsupported, mapException, modifyXAFlag, setConfig
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Constructor Detail
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DB2UniversalDataStoreHelper
public DB2UniversalDataStoreHelper(java.util.Properties props)
ThisDB2UniversalDataStoreHelperconstructor creates a newDB2UniversalDataStoreHelperbased 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 Detail
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getPrintWriter
public java.io.PrintWriter getPrintWriter()
This method is used to obtain the log writer to set on theDataSourcewhen database logging is enabled (for example:WAS.database=all=enabled). By default, null is returned and ajava.io.PrintWriterinstance created by WebSphere is used. You can override this method to return a differentjava.io.PrintWriterinstance instead of the default.- Specified by:
getPrintWriterin interfaceDataStoreHelper- Overrides:
getPrintWriterin classDB2DataStoreHelper- Returns:
java.io.PrintWriter.
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getDriverType
public final int getDriverType()
This method returns the driverType which is defined for the DB2 Universal JDBC driver.- Returns:
- driverType - possible value : 2 , 4
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doStatementCleanup
public void doStatementCleanup(java.sql.PreparedStatement stmt) throws java.sql.SQLExceptionThis method cleans up a statement before the statement is returned to the statement cache. This method is called only for statements being cached. It is called when at least one of the following statement properties has changed,
- cursorName
- fetchDirection
- maxFieldSize
- maxRows
- queryTimeout
DB2DataStoreHelperresets all of the statement properties listed aboveThe 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 can choose to do additional cleanup for the statement. However, this must never include closing the statement, since the statement is intended to be cached.
- Specified by:
doStatementCleanupin interfaceDataStoreHelper- Overrides:
doStatementCleanupin classDB2DataStoreHelper- Parameters:
stmt- the PreparedStatement.- Throws:
java.sql.SQLException- if an error occurs cleaning up the statement.
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