public interface

ConnectionCallback

org.springframework.jdbc.core.ConnectionCallback<T>

Class Overview

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

This is particularly useful for delegating to existing data access code that expects a Connection to work on and throws SQLException. For newly written code, it is strongly recommended to use JdbcTemplate's more specific operations, for example a query or update variant.

Summary

Public Methods
abstract T doInConnection(Connection con)
Gets called by JdbcTemplate.execute with an active JDBC Connection.

Public Methods

public abstract T doInConnection (Connection con)

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

If called without a thread-bound JDBC transaction (initiated by DataSourceTransactionManager), the code will simply get executed on the JDBC connection with its transactional semantics. If JdbcTemplate is configured to use a JTA-aware DataSource, the JDBC 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 JdbcTemplate.queryForObject etc. A thrown RuntimeException is treated as application exception: it gets propagated to the caller of the template.

Parameters
con active JDBC Connection
Returns
  • a result object, or null if none
Throws
SQLException if thrown by a JDBC method, to be auto-converted to a DataAccessException by a SQLExceptionTranslator
DataAccessException in case of custom exceptions