如何在c3p0中返回连接 [英] how to return a connection in c3p0
本文介绍了如何在c3p0中返回连接的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我正在使用c3p0 - ComboPooledDataSource。我正在初始化一次,如下所示。
I am using c3p0 - ComboPooledDataSource. I am initializing once as below.
private void init() {
cpds = new ComboPooledDataSource();
cpds.setDriverClass(driverName);
cpds.setJdbcUrl(url);
cpds.setUser(userName);
cpds.setPassword(pwd);
}
我从池中获得如下连接
public synchronized Connection getLocalConnection(String ipAddr)
throws SQLException {
return cpds.getConnection();
}
但我不确定它是否以正确的方式将连接返回完成执行查询时的池。我想
But i am not sure whether its the right way to return the connection back to the pool when i finish executing a query. I guess the
conn.close()
只返回连接回池而不是真正关闭连接。
我是正确的还是有其他方法吗?请帮助。
just returns the connection back to the pool instead of REALLY CLOSING the connection. Am i correct or is there any other way around? Pls help.
推荐答案
这是初始化代码
private DataSource init() {
DataSource unpooled = DataSources.unpooledDataSource(DB_URL, DB_USERNAME, DB_PASSWORD);
Map<String, Object> overrideProps = new HashMap<String, Object>();
overrideProps.put("maxPoolSize", MAX_POOL_SIZE);
overrideProps.put("minPoolSize", MIN_POOL_SIZE);
return DataSources.pooledDataSource(unpooled, overrideProps);
}
您可以从DataSource获得连接。
And you get connection from DataSource.
public Connection getConnection() throws SQLException {
return dataSource.getConnection();
}
要关闭连接,只需调用close()方法。
And to close the connection just call close() method.
connection.close();
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