import java.sql.Connection;
import java.util.Properties;
import java.sql.PreparedStatement;
import org.apache.commons.dbcp.ConnectionFactory;
import org.apache.commons.dbcp.PoolingDriver;
import org.apache.commons.dbcp.PoolingDataSource;
import org.apache.commons.dbcp.DriverConnectionFactory;
import org.apache.commons.dbcp.PoolableConnectionFactory;
import org.apache.commons.dbcp.DriverManagerConnectionFactory;
import org.apache.commons.pool.impl.GenericObjectPool;
import org.apache.commons.pool.KeyedObjectPoolFactory;
import org.apache.commons.pool.impl.GenericKeyedObjectPoolFactory;
public class ConnectionPoolBasics {
public static void main(String args[]) throws Exception {
GenericObjectPool gPool = new GenericObjectPool();
/*Class.forName("com.mysql.jdbc.Driver");
DriverManagerConnectionFactory cf =
new DriverManagerConnectionFactory(
"jdbc:mysql://localhost/commons", "root", "");*/
Properties props = new Properties();
props.setProperty("Username", "root");
props.setProperty("Password", "");
ConnectionFactory cf =
new DriverConnectionFactory(new com.mysql.jdbc.Driver(),
"jdbc:mysql://localhost/commons",
props);
KeyedObjectPoolFactory kopf =new GenericKeyedObjectPoolFactory(null, 8);
PoolableConnectionFactory pcf = new PoolableConnectionFactory(cf,
gPool,
kopf,
null,
false,
true);
for(int i = 0; i < 5; i++) {
gPool.addObject();
}
// PoolingDataSource pds = new PoolingDataSource(gPool);
PoolingDriver pd = new PoolingDriver();
pd.registerPool("example", gPool);
for(int i = 0; i < 5; i++) {
gPool.addObject();
}
Connection conn = java.sql.DriverManager.getConnection("jdbc:apache:commons:dbcp:example");
System.err.println("Connection: " + conn ); //": Delegate: " + ((org.apache.commons.dbcp.PoolingConnection)conn).getDelegate());
// do some work with the connection
PreparedStatement ps = conn.prepareStatement("Select * from customer where id = ?");
System.err.println("Active: " + gPool.getNumActive() + ", Idle: " + gPool.getNumIdle());
conn.close();
System.err.println("Active: " + gPool.getNumActive() + ", Idle: " + gPool.getNumIdle());
}
}
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ConnectionPoolBasics.zip( 1,214 k)