📄 connectionpool.java
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package com.wrox.tourism.db.util;import java.sql.SQLException;import java.sql.Connection;import javax.sql.DataSource;public class ConnectionPool { private DataSource ds; private static ConnectionPool mySelf; private ConnectionPool(DataSource ds) { this.ds = ds; } public static void init(DataSource ds) { mySelf = new ConnectionPool(ds); } public static ConnectionPool getInstance() { if (mySelf == null) { throw new IllegalStateException("Pool not initialized."); } return mySelf; } public Connection getConnection() throws SQLException { return ds.getConnection(); }}
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