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Spring Framework example source code file (ConnectionCallback.java)

This example Spring Framework source code file (ConnectionCallback.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Spring Framework tags/keywords

connectioncallback, connectioncallback, dataaccessexception, dataaccessexception, jdbc, object, object, sql, sqlexception, sqlexception

The Spring Framework ConnectionCallback.java source code

/*
 * Copyright 2002-2005 the original author or authors.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.springframework.jdbc.core;

import java.sql.Connection;
import java.sql.SQLException;

import org.springframework.dao.DataAccessException;

/**
 * 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.
 *
 * <p>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 <code>query or update variant.
 *
 * @author Juergen Hoeller
 * @since 1.1.3
 * @see JdbcTemplate#execute(ConnectionCallback)
 * @see JdbcTemplate#query
 * @see JdbcTemplate#update
 */
public interface ConnectionCallback {

	/**
	 * Gets called by <code>JdbcTemplate.execute with an active JDBC
	 * Connection. Does not need to care about activating or closing the
	 * Connection, or handling transactions.
	 *
	 * <p>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.
	 *
	 * <p>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 <code>JdbcTemplate.queryForObject
	 * etc. A thrown RuntimeException is treated as application exception:
	 * it gets propagated to the caller of the template.
	 *
	 * @param con active JDBC Connection
	 * @return a result object, or <code>null if none
	 * @throws SQLException if thrown by a JDBC method, to be auto-converted
	 * to a DataAccessException by a SQLExceptionTranslator
	 * @throws DataAccessException in case of custom exceptions
	 * @see JdbcTemplate#queryForObject(String, Class)
	 * @see JdbcTemplate#queryForRowSet(String)
	 */
	Object doInConnection(Connection con) throws SQLException, DataAccessException;

}

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