package com.burtbeckwith.grails.delayds

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

import org.apache.commons.dbcp.BasicDataSource
import org.codehaus.groovy.grails.commons.ConfigurationHolder as CH
import org.springframework.jdbc.datasource.DelegatingDataSource

class DelayedDataSource extends DelegatingDataSource {

	private boolean _initialized

	@Override
	Connection getConnection() throws SQLException {
		initialize()
		return super.getConnection()
	}
	
	@Override
	void afterPropertiesSet() {
		// override to not check for targetDataSource since it's lazily created
	}

	private synchronized void initialize() {
		if (_initialized) {
			return
		}

		def config = CH.config.dataSource
		setTargetDataSource(new BasicDataSource(
				driverClassName: config.driverClassName, password: config.password,
				username: config.username, url: config.url))

		_initialized = true
	}
}