Class ConnectJDBCDataStoreHelper
- java.lang.Object
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- com.ibm.websphere.rsadapter.GenericDataStoreHelper
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- com.ibm.websphere.rsadapter.DataDirectDataStoreHelper
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- com.ibm.websphere.rsadapter.ConnectJDBCDataStoreHelper
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- All Implemented Interfaces:
- DataStoreHelper
public class ConnectJDBCDataStoreHelper extends com.ibm.websphere.rsadapter.DataDirectDataStoreHelper
ConnectJDBCDataStoreHelper
is aDataStoreHelper
implementation customized for the DataDirect Technologies Connect JDBC driver.SQLException
mappings specific to theConnectJDBCDataStoreHelper
are the following:Error Code SQL State PortableSQLException
subclass230 StaleConnectionException.class
2627 DuplicateKeyException.class
2217 StaleConnectionException.class
2251 StaleConnectionException.class
2306 StaleConnectionException.class
2310 StaleConnectionException.class
2311 StaleConnectionException.class
08000 StaleConnectionException.class
08002 StaleConnectionException.class
08004 StaleConnectionException.class
08007 StaleConnectionException.class
40003 Void.class
S1000 Void.class
Note: This class and its methods can not be called or referenced directly by user applications.
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Field Summary
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Fields inherited from class com.ibm.websphere.rsadapter.GenericDataStoreHelper
customDefinedWasDefaultIsoLevel, defaultQueryTimeout, EOLN, genErrorMap, resBundle, tranErrorList
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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 and Description ConnectJDBCDataStoreHelper(java.util.Properties props)
ThisConnectJDBCDataStoreHelper
constructor creates a newConnectJDBCDataStoreHelper
based on theDataStoreHelper
properties provided.
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Method Summary
Methods Modifier and Type Method and Description boolean
doConnectionCleanup(java.sql.Connection conn)
This method is used to clean up a connection before it is returned to the connection pool for later reuse.void
doStatementCleanup(java.sql.PreparedStatement stmt)
This method cleans up a statement before the statement is returned to the statement cache.int
getIsolationLevel(AccessIntent intent)
This method determines the transaction isolation level based on the specifiedAccessIntent
.int
getResultSetConcurrency(AccessIntent intent)
This method determines the result set concurrency based on the specifiedAccessIntent
.boolean
isDuplicateKey(java.sql.SQLException sqlX)
The application server invokes this method to determine whether or not the specified error indicates a duplicate key violation.java.lang.String
showLockInfo(java.util.Properties props)
This method returns lock information for Microsoft SQL Server.-
Methods inherited from class com.ibm.websphere.rsadapter.DataDirectDataStoreHelper
doConnectionSetup, findMappingClass, getPrintWriter, isDataDirectExp, setUserDefinedMap
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Methods inherited from class com.ibm.websphere.rsadapter.GenericDataStoreHelper
calcPartitionNumber, doConnectionCleanupPerCloseConnection, doConnectionCleanupWithValidCheck, doConnectionSetupPerGetConnection, doConnectionSetupPerTransaction, getLockType, getMetaData, getPasswordForUseWithTrustedContextWithAuthentication, getResultSetType, getXAExceptionContents, hasLostUpdateOrDeadLockOccurred, isBatchUpdateSupportedWithAccessIntent, isConnectionError, isTransientConnectionError, mapException, modifyXAFlag, setConfig
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Constructor Detail
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ConnectJDBCDataStoreHelper
public ConnectJDBCDataStoreHelper(java.util.Properties props)
ThisConnectJDBCDataStoreHelper
constructor creates a newConnectJDBCDataStoreHelper
based on theDataStoreHelper
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.
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Method Detail
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doConnectionCleanup
public boolean doConnectionCleanup(java.sql.Connection conn) throws java.sql.SQLException
This method is used to clean up a connection before it is returned to the connection pool for later reuse. WebSphere automatically resets all standard connection properties (fields for which getters and setters are defined on
java.sql.Connection
). This method may be used to reset other properties proprietary to a specific JDBC driver/database and do whatever else is necessary to prepare the connection for reuse.A
DataStoreHelper
is permitted to use the provided connection to create and execute statements for the purpose of cleaning up the connection. Any statements created within thedoConnectionCleanup
method must be explicitly closed within thedoConnectionCleanup
method. ThedoConnectionCleanup
method must never close the connection being cleaned up.If any standard connection properties are modified in this method, a value of true must be returned, indicating to WebSphere that at least one standard connection property was modified. A value of false is returned only if no standard connection properties were modified.
ConnectJDBCDataStoreHelper
resets the network timeout to 0.- Specified by:
doConnectionCleanup
in interfaceDataStoreHelper
- Overrides:
doConnectionCleanup
in classGenericDataStoreHelper
- Parameters:
conn
- the connection to attempt to clean up.- Returns:
- true if any standard connection property was modified, otherwise false.
- Throws:
java.sql.SQLException
- If an error occurs while cleaning up the connection.
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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
- longDataCacheSize
- maxFieldSize
- maxRows
- queryTimeout
ConnectJDBCDataStoreHelper
resets all of the statement properties listed above except for thecursorName
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 interfaceDataStoreHelper
- Overrides:
doStatementCleanup
in classGenericDataStoreHelper
- Parameters:
stmt
- the PreparedStatement.- Throws:
java.sql.SQLException
- if an error occurs cleaning up the statement.
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getResultSetConcurrency
public int getResultSetConcurrency(AccessIntent intent) throws javax.resource.ResourceException
This method determines the result set concurrency based on the specifiedAccessIntent
.ConnectJDBCDataStoreHelper
returnsjava.sql.ResultSet.CONCUR_UPDATABLE
if the access type of theAccessIntent
isAccessIntent.ACCESS_TYPE_UPDATE
and the concurrency control isAccessIntent.CONCURRENCY_CONTROL_PESSIMISTIC
and the update lock hint is eitherAccessIntent.PESSIMISTIC_UPDATE_LOCK_HINT_EXCLUSIVE
orAccessIntent.PESSIMISTIC_UPDATE_LOCK_HINT_NONE
. In all other cases,java.sql.ResultSet.CONCUR_UPDATABLE
is returned.- Specified by:
getResultSetConcurrency
in interfaceDataStoreHelper
- Overrides:
getResultSetConcurrency
in classcom.ibm.websphere.rsadapter.DataDirectDataStoreHelper
- Parameters:
intent
- AnAccessIntent
.- Returns:
- A result set concurrency constant defined on
java.sql.ResultSet
. - Throws:
javax.resource.ResourceException
- If a result set concurrency cannot be determined from theAccessIntent
.- See Also:
AccessIntent
,ResultSet
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getIsolationLevel
public int getIsolationLevel(AccessIntent intent) throws javax.resource.ResourceException
This method determines the transaction isolation level based on the specifiedAccessIntent
. If theAccessIntent
parameter is null, a default value is returned that is appropriate for the database backend. The default transaction isolation level forConnectJDBCDataStoreHelper
isConnection.TRANSACTION_REPEATABLE_READ.
In the case where an
AccessIntent
is specified,ConnectJDBCDataStoreHelper
computes the transaction isolation level as follows:If the concurrency control is
AccessIntent.CONCURRENCY_CONTROL_OPTIMISTIC
then a transaction isolation level ofConnection.TRANSACTION_READ_COMMITTED
is returned.If the concurrency control is
AccessIntent.CONCURRENCY_CONTROL_PESSIMISTIC
and the access type isAccessIntent.ACCESS_TYPE_READ
then a transaction isolation level ofConnection.TRANSACTION_REPEATABLE_READ
is returned.If the concurrency control is
AccessIntent.CONCURRENCY_CONTROL_PESSIMISTIC
and the access type isAccessIntent.ACCESS_TYPE_UPDATE
then the transation isolation level is determined from the following table based on the pessimistic update lock hint.pessimistic update lock hint transaction isolation level AccessIntent.PESSIMISTIC_UPDATE_LOCK_HINT_NONE
AccessIntent.PESSIMISTIC_UPDATE_LOCK_HINT_WEAKEST_LOCK_AT_LOAD
Connection.TRANSACTION_REPEATABLE_READ
AccessIntent.PESSIMISTIC_UPDATE_LOCK_HINT_NOCOLLISION
Connection.TRANSACTION_READ_COMMITTED
AccessIntent.PESSIMISTIC_UPDATE_LOCK_HINT_EXCLUSIVE
Connection.TRANSACTION_SERIALIZABLE
- Specified by:
getIsolationLevel
in interfaceDataStoreHelper
- Overrides:
getIsolationLevel
in classcom.ibm.websphere.rsadapter.DataDirectDataStoreHelper
- Parameters:
intent
- AnAccessIntent
- Returns:
- A transaction isolation level appropriate for the specified
AccessIntent
. - Throws:
javax.resource.ResourceException
- If a transaction isolation level cannot be determined from theAccessIntent
.- See Also:
AccessIntent
,Connection
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isDuplicateKey
public boolean isDuplicateKey(java.sql.SQLException sqlX)
The application server invokes this method to determine whether or not the specified error indicates a duplicate key violation. The method is invoked regardless of the data source's error detection model.
- Specified by:
isDuplicateKey
in interfaceDataStoreHelper
- Overrides:
isDuplicateKey
in classGenericDataStoreHelper
- Parameters:
sqlX
- the error.- Returns:
- true if the error indicates a duplicate key violation, otherwise false.
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showLockInfo
public java.lang.String showLockInfo(java.util.Properties props) throws java.lang.Exception
This method returns lock information for Microsoft SQL Server. The
props
parameter can include the following properties:- user - user name that has a DBA authority. If not specified, a default value of "sa" is used.
- password - the password corresponding to the user name. If not specified, a default value of "" (empty string) is used.
- serverName - the server name where the Microsoft SQL Server database resides.
- portNumber - the port where Microsoft SQL Server is listening.
- Overrides:
showLockInfo
in classcom.ibm.websphere.rsadapter.DataDirectDataStoreHelper
- Parameters:
props
- properties containing information needed to connect to the database.- Returns:
- the lock information.
- Throws:
java.lang.Exception
- if an error occurs while collecting the lock information.
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