com.ibm.websphere.rsadapter
Class ConnectJDBCDataStoreHelper
- java.lang.Object
DataDirectDataStoreHelper
com.ibm.websphere.rsadapter.ConnectJDBCDataStoreHelper
- public class ConnectJDBCDataStoreHelper
- extends DataDirectDataStoreHelper
ConnectJDBCDataStoreHelper
is a DataStoreHelper
implementation
customized for the DataDirect Technologies Connect JDBC driver.
SQLException
mappings specific to the ConnectJDBCDataStoreHelper
are the following:
Error Code | SQL State | PortableSQLException subclass |
---|---|---|
230 | 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.
Constructor Summary
Constructor and Description |
---|
ConnectJDBCDataStoreHelper(java.util.Properties props)
This
ConnectJDBCDataStoreHelper constructor creates a new
ConnectJDBCDataStoreHelper based on the DataStoreHelper
properties provided.
|
Method Summary
Modifier and Type | Method and Description |
---|---|
|
doStatementCleanup(java.sql.PreparedStatement stmt)
This method cleans up a statement before the statement is returned to the statement
cache.
|
|
getIsolationLevel(AccessIntent intent)
This method determines the transaction isolation level based on the specified
AccessIntent .
|
|
getResultSetConcurrency(AccessIntent intent)
This method determines the result set concurrency based on the specified
AccessIntent .
|
|
isDuplicateKey(java.sql.SQLException sqlX)
The application server invokes this method to determine whether or not the specified
error indicates a duplicate key violation.
|
|
showLockInfo(java.util.Properties props)
This method returns lock information for Microsoft SQL Server.
|
Methods inherited from class java.lang.Object |
---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail
ConnectJDBCDataStoreHelper
- public ConnectJDBCDataStoreHelper( java.util.Properties props)
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
- longDataCacheSize
- maxFieldSize
- maxRows
- queryTimeout
ConnectJDBCDataStoreHelper
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.
stmt
- the PreparedStatement. java.sql.SQLException
- if an error occurs cleaning up the statement. getResultSetConcurrency
- public int getResultSetConcurrency( AccessIntent intent)
- throws javax.resource.ResourceException
AccessIntent
.
ConnectJDBCDataStoreHelper
returns
java.sql.ResultSet.CONCUR_UPDATABLE
if the access type of the
AccessIntent
is AccessIntent.ACCESS_TYPE_UPDATE
and the
concurrency control is AccessIntent.CONCURRENCY_CONTROL_PESSIMISTIC
and
the update lock hint is either
AccessIntent.PESSIMISTIC_UPDATE_LOCK_HINT_EXCLUSIVE
or
AccessIntent.PESSIMISTIC_UPDATE_LOCK_HINT_NONE
. In all other cases,
java.sql.ResultSet.CONCUR_UPDATABLE
is returned.
intent
- An AccessIntent
. java.sql.ResultSet
. javax.resource.ResourceException
- If a result set concurrency cannot be determined
from the AccessIntent
. AccessIntent
,
ResultSet
getIsolationLevel
- public int getIsolationLevel(AccessIntent intent)
- throws javax.resource.ResourceException
AccessIntent
.
If the AccessIntent
parameter is null, a default value is returned
that is appropriate for the database backend. The default transaction isolation level
for ConnectJDBCDataStoreHelper
is
Connection.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
intent
- An AccessIntent
AccessIntent
. javax.resource.ResourceException
- If a transaction isolation level cannot be determined
from the AccessIntent
. AccessIntent
,
Connection
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.
sqlX
- the error. 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.
props
- properties containing information needed to connect to the database. java.lang.Exception
- if an error occurs while collecting the lock information.
ConnectJDBCDataStoreHelper
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.