001/* 002 * Copyright 2002-2012 the original author or authors. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * https://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016 017package org.springframework.jdbc.datasource; 018 019import java.sql.Connection; 020 021import javax.sql.DataSource; 022 023/** 024 * Extension of the {@code javax.sql.DataSource} interface, to be 025 * implemented by special DataSources that return JDBC Connections 026 * in an unwrapped fashion. 027 * 028 * <p>Classes using this interface can query whether or not the Connection 029 * should be closed after an operation. Spring's DataSourceUtils and 030 * JdbcTemplate classes automatically perform such a check. 031 * 032 * @author Rod Johnson 033 * @author Juergen Hoeller 034 * @see SingleConnectionDataSource#shouldClose 035 * @see DataSourceUtils#releaseConnection 036 * @see org.springframework.jdbc.core.JdbcTemplate 037 */ 038public interface SmartDataSource extends DataSource { 039 040 /** 041 * Should we close this Connection, obtained from this DataSource? 042 * <p>Code that uses Connections from a SmartDataSource should always 043 * perform a check via this method before invoking {@code close()}. 044 * <p>Note that the JdbcTemplate class in the 'jdbc.core' package takes care of 045 * releasing JDBC Connections, freeing application code of this responsibility. 046 * @param con the Connection to check 047 * @return whether the given Connection should be closed 048 * @see java.sql.Connection#close() 049 */ 050 boolean shouldClose(Connection con); 051 052}