## org.apache.xalan.lib.sql
Class DefaultConnectionPool

    java.lang.Object
      |
      +--org.apache.xalan.lib.sql.DefaultConnectionPool

public class DefaultConnectionPool
extends java.lang.Object
implements ConnectionPool

For internal connectiones, i.e. Connection information supplies in the Stylesheet. The Default Connection Pool will be used.

Constructor Summary
`DefaultConnectionPool()`

Method Summary
`void` `freeUnused()` Go through the connection pool and release any connections that are not InUse;
`java.sql.Connection` `getConnection()`
`boolean` `hasActiveConnections()` Is our ConnectionPool have any connections that are still in Use ??
`void` `initializePool()`
`boolean` `isEnabled()` Return our current Active state
`void` `releaseConnection(java.sql.Connection con)`
`void` `releaseConnectionOnError(java.sql.Connection con)`
`void` `setDriver(java.lang.String d)` Set the driver call to be used to create connections
`void` `setMinConnections(int n)` Override the current number of connections to keep in the pool.
`void` `setPassword(java.lang.String p)` Set the password in the property set.
`void` `setPoolEnabled(boolean flag)` The Pool can be Enabled and Disabled.
`void` `setProtocol(java.util.Properties p)` The Protocol string is used to pass in other connection properties.
`void` `setURL(java.lang.String url)` Set the url used to connect to the database
`void` `setUser(java.lang.String u)` Set the user name in the property set
`boolean` `testConnection()` Try to aquire a new connection, if it succeeds then return true, else return false.

Methods inherited from class java.lang.Object
`equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### DefaultConnectionPool

    public DefaultConnectionPool()

Method Detail

### isEnabled

    public boolean isEnabled()

  Return our current Active state
  Specified by:
    isEnabled in interface ConnectionPool

### setDriver

    public void setDriver(java.lang.String d)

  Set the driver call to be used to create connections
  Specified by:
    setDriver in interface ConnectionPool
  Parameters:
    `d` -

### setURL

    public void setURL(java.lang.String url)

  Set the url used to connect to the database
  Specified by:
    setURL in interface ConnectionPool
  Parameters:
    `url` -

### freeUnused

    public void freeUnused()

  Go through the connection pool and release any connections that are not InUse;
  Specified by:
    freeUnused in interface ConnectionPool

### hasActiveConnections

    public boolean hasActiveConnections()

  Is our ConnectionPool have any connections that are still in Use ??
  Specified by:
    hasActiveConnections in interface ConnectionPool

### setPassword

    public void setPassword(java.lang.String p)

  Set the password in the property set.
  Specified by:
    setPassword in interface ConnectionPool
  Parameters:
    `p` -

### setUser

    public void setUser(java.lang.String u)

  Set the user name in the property set
  Specified by:
    setUser in interface ConnectionPool
  Parameters:
    `u` -

### setProtocol

    public void setProtocol(java.util.Properties p)

  The Protocol string is used to pass in other connection properties. A properties file is a general purpose container
  Specified by:
    setProtocol in interface ConnectionPool
  Parameters:
    `p` -

### setMinConnections

    public void setMinConnections(int n)

  Override the current number of connections to keep in the pool. This setting will only have effect on a new pool or when a new connection is requested and there is less connections that this setting.
  Specified by:
    setMinConnections in interface ConnectionPool
  Parameters:
    `n` -

### testConnection

    public boolean testConnection()

  Try to aquire a new connection, if it succeeds then return true, else return false. Note: This method will cause the connection pool to be built.
  Specified by:
    testConnection in interface ConnectionPool

### getConnection

    public java.sql.Connection getConnection()
                                      throws java.lang.IllegalArgumentException,
                                             java.sql.SQLException

  Specified by:
    getConnection in interface ConnectionPool
  Returns:
    Connection
  Throws:
    java.sql.SQLException -
    java.lang.IllegalArgumentException -

### releaseConnection

    public void releaseConnection(java.sql.Connection con)
                           throws java.sql.SQLException

  Specified by:
    releaseConnection in interface ConnectionPool
  Parameters:
    `con` -
  Throws:
    java.sql.SQLException -

### releaseConnectionOnError

    public void releaseConnectionOnError(java.sql.Connection con)
                                  throws java.sql.SQLException

  Specified by:
    releaseConnectionOnError in interface ConnectionPool
  Parameters:
    `con` -
  Throws:
    java.sql.SQLException -

### initializePool

    public void initializePool()
                        throws java.lang.IllegalArgumentException,
                               java.sql.SQLException

  Throws:
    java.lang.IllegalArgumentException -
    java.sql.SQLException -

### setPoolEnabled

    public void setPoolEnabled(boolean flag)

  The Pool can be Enabled and Disabled. Disabling the pool closes all the outstanding Unused connections and any new connections will be closed upon release.
  Specified by:
    setPoolEnabled in interface ConnectionPool
  Parameters:
    `flag` - Control the Connection Pool. If it is enabled then Connections will actuall be held around. If disabled then all unused connections will be instantly closed and as connections are released they are closed and removed from the pool.

Copyright © 2006 Apache XML Project. All Rights Reserved.