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; 020import javax.sql.DataSource; 021 022/** 023 * Extension of the {@code javax.sql.DataSource} interface, to be 024 * implemented by special DataSources that return JDBC Connections 025 * in an unwrapped fashion. 026 * 027 * <p>Classes using this interface can query whether or not the Connection 028 * should be closed after an operation. Spring's DataSourceUtils and 029 * JdbcTemplate classes automatically perform such a check. 030 * 031 * @author Rod Johnson 032 * @author Juergen Hoeller 033 * @see SingleConnectionDataSource#shouldClose 034 * @see DataSourceUtils#releaseConnection 035 * @see org.springframework.jdbc.core.JdbcTemplate 036 */ 037public interface SmartDataSource extends DataSource { 038 039 /** 040 * Should we close this Connection, obtained from this DataSource? 041 * <p>Code that uses Connections from a SmartDataSource should always 042 * perform a check via this method before invoking {@code close()}. 043 * <p>Note that the JdbcTemplate class in the 'jdbc.core' package takes care of 044 * releasing JDBC Connections, freeing application code of this responsibility. 045 * @param con the Connection to check 046 * @return whether the given Connection should be closed 047 * @see java.sql.Connection#close() 048 */ 049 boolean shouldClose(Connection con); 050 051}