Resin 1.1
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Database Pool
Although you can use the JDBC classes directly, the Resin database pool object provides some conveniences. It reuses old database connections, eliminating the connection establishment. It automatically closes open statements and connections when the jsp request completes.
com.caucho.sql.DBPool
new DBPool(url [, name, password]) | Returns a DBPool object corresponding to the given JDBC url and given the name and password. This call does not open any connections, it merely stores the pool information for later use.
getConnection() | Creates a connection to the database. If it can, DBPool will use a free connetion in the pool. Resin will automatically free the connection as soon as the jsp request completes.
loadDriver(drivername) | Loads the given classname as a JDBC driver. Essentially the same functionality as the `Class.forName(drivername)` suggested by JDBC.
createStatement() | Creates a JDBC Statement. Essentially the same as `getConnection().createStatement()`.
prepareStatement(sql) | Creates a JDBC PreparedStatement. Essentially the same as `getConnection().prepareStatement(sql)`.
prepareCall(sql) | Creates a JDBC CallableStatement. Essentially the same as `getConnection().prepareCall(sql)`.
close() | Closes the allocated connection. This is necessar to put the connection back into the pool.
executeUpdate(sql) | Sends the given sql to the database. This is the same as the JDBC `statement.executeUpdate(sql)` statement, but the DBPool does all the busywork of creating the connection the statement and closing them.
com.caucho.sql.DBPool
Scripts must access the `DBPool` object using the Packages mechanism.
### new DBPool(url [, name, password])
Returns a DBPool object corresponding to the given JDBC url and given the name and password. This call does not open any connections, it merely stores the pool information for later use.
### getConnection()
Creates a connection to the database. If it can, DBPool will use a free connetion in the pool. Resin will automatically free the connection as soon as the jsp request completes.
### loadDriver(drivername)
Loads the given classname as a JDBC driver. Essentially the same functionality as the `Class.forName(drivername)` suggested by JDBC.
### createStatement()
Creates a JDBC Statement. Essentially the same as `getConnection().createStatement()`.
### prepareStatement(sql)
Creates a JDBC PreparedStatement. Essentially the same as `getConnection().prepareStatement(sql)`.
### prepareCall(sql)
Creates a JDBC CallableStatement. Essentially the same as `getConnection().prepareCall(sql)`.
### close()
Closes the allocated connection. This is necessar to put the connection back into the pool.
### executeUpdate(sql)
Sends the given sql to the database. This is the same as the JDBC `statement.executeUpdate(sql)` statement, but the DBPool does all the busywork of creating the connection the statement and closing them.
Database Library |  | ResultSet
Copyright © 1998-2000 Caucho Technology. All rights reserved. Last modified: Fri, 31 Mar 2000 18:50:24 -0800 (PST)