org.apache.ojb.broker.platforms

Class PlatformWLOracle9iImpl

java.lang.Object

org.apache.ojb.broker.platforms.PlatformDefaultImpl

org.apache.ojb.broker.platforms.PlatformOracleImpl

org.apache.ojb.broker.platforms.PlatformWLOracle9iImpl

All Implemented Interfaces:

JoinSyntaxTypes, Platform

Deprecated.

since OJB 1.0.2 the default PlatformOracle9iImpl should be usable in WebLogic

public class PlatformWLOracle9iImpl
extends PlatformOracleImpl

This class is a concrete implementation of Platform. Provides an implementation that works around some issues with Oracle running within WebLogic. As WebLogic wraps the Oracle physical connection with its own logical connection it is necessary to retrieve the underlying physical connection before creating a CLOB or BLOB. NOTE : When you use the physical connection WebLogic by default marks it as "infected" and discards it when the logicical connection is closed. You can change this behavior by setting the RemoveInfectedConnectionsEnabled attribute on a connection pool. see http://e-docs.bea.com/wls/docs81/jdbc/thirdparty.html#1043646 Optimization: Oracle Batching (not standard JDBC batching) see http://technet.oracle.com/products/oracle9i/daily/jun07.html Optimization: Oracle Prefetching see http://otn.oracle.com/sample_code/tech/java/sqlj_jdbc/files/advanced/RowPrefetchSample/Readme.html TODO: Optimization: use ROWNUM to minimize the effects of not having server side cursors see http://asktom.oracle.com/pls/ask/f?p=4950:8:::::F4950_P8_DISPLAYID:127412348064

Version:

CVS $Id: PlatformWLOracle9iImpl.java 365232 2005-12-21 22:36:07Z tomdz $

Author:

Matthew Baird, Erik Forkalsrud, Martin Kalén, Dougall Squair

See Also:

Platform, PlatformDefaultImpl, PlatformOracleImpl, PlatformOracle9iImpl

Field Summary

Fields inherited from interface org.apache.ojb.broker.accesslayer.JoinSyntaxTypes

ORACLE_JOIN_SYNTAX, SQL92_JOIN_SYNTAX, SQL92_NOPAREN_JOIN_SYNTAX, SYBASE_JOIN_SYNTAX

Constructor Summary

Constructors

Constructor and Description
PlatformWLOracle9iImpl() Deprecated.

Method Summary

Methods

Modifier and Type	Method and Description
void	addBatch(java.sql.PreparedStatement stmt) Deprecated. Try Oracle update batching and call executeUpdate or revert to JDBC update batching.
void	afterStatementCreate(java.sql.Statement stmt) Deprecated. Enables Oracle row prefetching if supported.
void	beforeBatch(java.sql.PreparedStatement stmt) Deprecated. Try Oracle update batching and call setExecuteBatch or revert to JDBC update batching.
int[]	executeBatch(java.sql.PreparedStatement stmt) Deprecated. Try Oracle update batching and call sendBatch or revert to JDBC update batching.
void	setObjectForStatement(java.sql.PreparedStatement ps, int index, java.lang.Object value, int sqlType) Deprecated. For objects beyond 4k, weird things happen in Oracle if you try to use "setBytes", so for all cases it's better to use setBinaryStream.

Methods inherited from class org.apache.ojb.broker.platforms.PlatformOracleImpl

createSequenceQuery, createSequenceQuery, dropSequenceQuery, getJoinSyntaxType, nextSequenceQuery, prepareNextValProcedureStatement, registerOutResultSet

Methods inherited from class org.apache.ojb.broker.platforms.PlatformDefaultImpl

addPagingSql, afterStatementClose, beforeStatementClose, bindPagingParameters, bindPagingParametersFirst, changeAutoCommitState, concatenate, getEscapeClause, getLastInsertIdentityQuery, initializeJdbcConnection, setNullForStatement, supportsBatchOperations, supportsMultiColumnCountDistinct, supportsPaging, useCountForResultsetSize

Methods inherited from class java.lang.Object

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

Constructor Detail

PlatformWLOracle9iImpl

public PlatformWLOracle9iImpl()

Deprecated.

Method Detail

afterStatementCreate

public void afterStatementCreate(java.sql.Statement stmt)
                          throws PlatformException

Deprecated.

Enables Oracle row prefetching if supported. See http://otn.oracle.com/sample_code/tech/java/sqlj_jdbc/files/advanced/RowPrefetchSample/Readme.html. This is RDBMS server-to-client prefetching and thus one layer below the OJB-internal prefetching-to-cache introduced in version 1.0rc5.

Specified by:

afterStatementCreate in interface Platform

Overrides:

afterStatementCreate in class PlatformOracleImpl

Parameters:

stmt - the statement just created

Throws:

PlatformException - upon JDBC failure

beforeBatch

public void beforeBatch(java.sql.PreparedStatement stmt)
                 throws PlatformException

Deprecated.

Try Oracle update batching and call setExecuteBatch or revert to JDBC update batching. See 12-2 Update Batching in the Oracle9i JDBC Developer's Guide and Reference.

Specified by:

beforeBatch in interface Platform

Overrides:

beforeBatch in class PlatformDefaultImpl

Parameters:

stmt - the prepared statement to be used for batching

Throws:

PlatformException - upon JDBC failure

addBatch

public void addBatch(java.sql.PreparedStatement stmt)
              throws PlatformException

Deprecated.

Try Oracle update batching and call executeUpdate or revert to JDBC update batching.

Specified by:

addBatch in interface Platform

Overrides:

addBatch in class PlatformDefaultImpl

Parameters:

stmt - the statement beeing added to the batch

Throws:

PlatformException - upon JDBC failure

executeBatch

public int[] executeBatch(java.sql.PreparedStatement stmt)
                   throws PlatformException

Deprecated.

Try Oracle update batching and call sendBatch or revert to JDBC update batching.

Specified by:

executeBatch in interface Platform

Overrides:

executeBatch in class PlatformDefaultImpl

Parameters:

stmt - the batched prepared statement about to be executed

Returns:

always null if Oracle update batching is used, since it is impossible to dissolve total row count into distinct statement counts. If JDBC update batching is used, an int array is returned containing number of updated rows for each batched statement.

Throws:

PlatformException - upon JDBC failure

setObjectForStatement

public void setObjectForStatement(java.sql.PreparedStatement ps,
                         int index,
                         java.lang.Object value,
                         int sqlType)
                           throws java.sql.SQLException

Deprecated.

Description copied from class: PlatformOracleImpl

For objects beyond 4k, weird things happen in Oracle if you try to use "setBytes", so for all cases it's better to use setBinaryStream. Oracle also requires a change in the resultset type of the prepared statement. MBAIRD NOTE: BLOBS may not work with Oracle database/thin driver versions prior to 8.1.6.

Specified by:

setObjectForStatement in interface Platform

Overrides:

setObjectForStatement in class PlatformOracleImpl

Throws:

java.sql.SQLException

See Also:

Platform.setObjectForStatement(java.sql.PreparedStatement, int, java.lang.Object, int)