org.springframework.jdbc.core.ConnectionCallback<T> |
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.
Public Methods | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Gets called by
JdbcTemplate.execute with an active JDBC
Connection. |
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.
con | active JDBC Connection |
---|
null
if noneSQLException | if thrown by a JDBC method, to be auto-converted to a DataAccessException by a SQLExceptionTranslator |
---|---|
DataAccessException | in case of custom exceptions |