org.araneaframework.backend.list.helper
Interface ConnectionCallback

All Known Implementing Classes:

BaseListSqlHelper.CountSqlCallback, BaseListSqlHelper.ItemRangeSqlCallback, BaseListSqlHelper.ListItemsDataCallback

public interface ConnectionCallback

Generic callback interface for code that operates on a CCI Connection. Allows to execute any number of operations on a single Connection, using any type and number of Interaction.

This is particularly useful for delegating to existing data access code that expects a Connection to work on and throws ResourceException. For newly written code, it is strongly recommended to use CciTemplate's more specific execute variants.

Author:

Thierry Templier, Juergen Hoeller

Method Summary

Object

doInConnection(Connection con) Gets called by CciTemplate.execute with an active CCI Connection.

Method Detail

doInConnection

public Object doInConnection(Connection con)
                      throws SQLException

Gets called by CciTemplate.execute with an active CCI Connection. Does not need to care about activating or closing the Connection, or handling transactions.

If called without a thread-bound CCI transaction (initiated by CciLocalTransactionManager), the code will simply get executed on the CCI Connection with its transactional semantics. If CciTemplate is configured to use a JTA-aware ConnectionFactory, the CCI Connection and thus the callback code will be transactional if a JTA transaction is active.

Allows for returning a result object created within the callback, i.e. a domain object or a collection of domain objects. Note that there's special support for single step actions: see the CciTemplate.execute variants. A thrown RuntimeException is treated as application exception: it gets propagated to the caller of the template.

Parameters:

con - active CCI Connection

Throws:

SQLException