java.lang.Object | |
↳ | org.springframework.jdbc.core.support.AbstractLobCreatingPreparedStatementCallback |
Abstract PreparedStatementCallback implementation that manages a LobCreator. Typically used as inner class, with access to surrounding method arguments.
Delegates to the setValues
template method for setting values
on the PreparedStatement, using a given LobCreator for BLOB/CLOB arguments.
A usage example with JdbcTemplate:
JdbcTemplate jdbcTemplate = new JdbcTemplate(dataSource); // reusable object LobHandler lobHandler = new DefaultLobHandler(); // reusable object jdbcTemplate.execute( "INSERT INTO imagedb (image_name, content, description) VALUES (?, ?, ?)", new AbstractLobCreatingPreparedStatementCallback(lobHandler) { protected void setValues(PreparedStatement ps, LobCreator lobCreator) throws SQLException { ps.setString(1, name); lobCreator.setBlobAsBinaryStream(ps, 2, contentStream, contentLength); lobCreator.setClobAsString(ps, 3, description); } } );
Public Constructors | |||||||||||
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Create a new AbstractLobCreatingPreparedStatementCallback for the
given LobHandler.
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Public Methods | |||||||||||
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Gets called by
JdbcTemplate.execute with an active JDBC
PreparedStatement. |
Protected Methods | |||||||||||
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Set values on the given PreparedStatement, using the given
LobCreator for BLOB/CLOB arguments.
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Inherited Methods | |||||||||||
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From class
java.lang.Object
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From interface
org.springframework.jdbc.core.PreparedStatementCallback
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Create a new AbstractLobCreatingPreparedStatementCallback for the given LobHandler.
lobHandler | the LobHandler to create LobCreators with |
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Gets called by JdbcTemplate.execute
with an active JDBC
PreparedStatement. Does not need to care about closing the Statement
or the Connection, or about handling transactions: this will all be
handled by Spring's JdbcTemplate.
NOTE: Any ResultSets opened should be closed in finally blocks
within the callback implementation. Spring will close the Statement
object after the callback returned, but this does not necessarily imply
that the ResultSet resources will be closed: the Statement objects might
get pooled by the connection pool, with close
calls only
returning the object to the pool but not physically closing the resources.
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.
ps | active JDBC PreparedStatement |
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null
if noneDataAccessException | |
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SQLException |
Set values on the given PreparedStatement, using the given LobCreator for BLOB/CLOB arguments.
ps | the PreparedStatement to use |
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lobCreator | the LobCreator to use |
SQLException | if thrown by JDBC methods |
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DataAccessException | in case of custom exceptions |