Top Description Methods
org.springframework.jdbc.core

public Interface ConnectionCallback<T>

Annotations
@FunctionalInterface
Type Parameters
<T>
the result type
Imports
java.sql.Connection, .SQLException, org.springframework.dao.DataAccessException, org.springframework.lang.Nullable
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.

Author
Juergen Hoeller
Since
1.1.3
See Also
JdbcTemplate#execute(ConnectionCallback), JdbcTemplate#query, JdbcTemplate#update

Method Summary

Modifier and TypeMethod and Description
public T

Returns:

a result object, or null if none
doInConnection(Connection
active JDBC Connection
con)

Gets called by JdbcTemplate.execute with an active JDBC Connection.

Method Detail

doInConnectionback to summary
public T doInConnection(Connection con) throws SQLException, DataAccessException

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:Connection

active JDBC Connection

Returns:T

a result object, or null if none

Annotations
@Nullable
Exceptions
SQLException:
if thrown by a JDBC method, to be auto-converted to a DataAccessException by an SQLExceptionTranslator
DataAccessException:
in case of custom exceptions
See Also
JdbcTemplate#queryForObject(String, Class), JdbcTemplate#queryForRowSet(String)