com.goldencode.p2j.persist.orm

Class TempTableDataSourceProvider

java.lang.Object

com.goldencode.p2j.persist.orm.TempTableDataSourceProvider

All Implemented Interfaces:

DataSourceProvider

class TempTableDataSourceProvider
extends java.lang.Object
implements DataSourceProvider

A data source provider which supplies a JDBC connection for legacy temp-table use. The connection is not closed until all temp-tables have been dropped explicitly. The connection provided is a hard-coded proxy which delegates most service requests to a backing, physical JDBC connection, but intercepts certain requests to implement the desired behavior.

Implements prepared statement caching in a manner compatible with H2's prepared statement implementation.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
private static class	TempTableDataSourceProvider.DataSourceImpl Implementation of the DataSource interface, which maintains context-local data for each private temp-table connection.
private static class	TempTableDataSourceProvider.PSKey Prepared statement cache key.

Constructor Summary

Constructors

Constructor and Description
TempTableDataSourceProvider()

Method Summary

Modifier and Type	Method and Description
javax.sql.DataSource	getDataSource(Database database, DatabaseConfig cfg) Obtain the DataSource for a specific Database, within the current context.
static boolean	isProxy(java.sql.Connection conn) Check if the connection is a proxy delivered by this provider.
static java.sql.Connection	unwrapProxy(java.sql.Connection conn) Retrieve the original connection without proxy.

Methods inherited from class java.lang.Object

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

Constructor Detail

TempTableDataSourceProvider

TempTableDataSourceProvider()

Method Detail

isProxy

public static boolean isProxy(java.sql.Connection conn)

Check if the connection is a proxy delivered by this provider.

Parameters:

conn - The connection to be checked.

Returns:

true if the provided connection is proxied by this provider.

unwrapProxy

public static java.sql.Connection unwrapProxy(java.sql.Connection conn)

Retrieve the original connection without proxy. Use this with care as it bypassed some critical business logic. Avoid executing SQL directly on the physical connection, unless you are sure that the wrapper is not affected.

Parameters:

conn - The connection to unwrap.

Returns:

The physical connection. The unwrapping works only if this is a proxy of this provider.

getDataSource

public javax.sql.DataSource getDataSource(Database database,
                                          DatabaseConfig cfg)

Obtain the DataSource for a specific Database, within the current context.

Specified by:

getDataSource in interface DataSourceProvider

Parameters:

database - The FWD Database that needs a connection to backing database.

cfg - The configuration for the given database.

Returns:

the the DataSource for the specified Database.