Class DefaultConnectionPool

java.lang.Object
org.apache.xalan.lib.sql.DefaultConnectionPool
All Implemented Interfaces:
ConnectionPool

public class DefaultConnectionPool extends Object implements ConnectionPool
For internal connectiones, i.e. Connection information supplies in the Stylesheet. The Default Connection Pool will be used.
  • Constructor Details

    • DefaultConnectionPool

      public DefaultConnectionPool()
  • Method Details

    • isEnabled

      public boolean isEnabled()
      Return our current Active state
      Specified by:
      isEnabled in interface ConnectionPool
    • setDriver

      public void setDriver(String d)
      Set the driver call to be used to create connections
      Specified by:
      setDriver in interface ConnectionPool
      Parameters:
      d -
    • setURL

      public void setURL(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(String p)
      Set the password in the property set.
      Specified by:
      setPassword in interface ConnectionPool
      Parameters:
      p -
    • setUser

      public void setUser(String u)
      Set the user name in the property set
      Specified by:
      setUser in interface ConnectionPool
      Parameters:
      u -
    • setProtocol

      public void setProtocol(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 Connection getConnection() throws IllegalArgumentException, SQLException
      Description copied from interface: ConnectionPool
      Retrive a database connection from the pool
      Specified by:
      getConnection in interface ConnectionPool
      Returns:
      Connection
      Throws:
      SQLException
      IllegalArgumentException
    • releaseConnection

      public void releaseConnection(Connection con) throws SQLException
      Description copied from interface: ConnectionPool
      Return a connection to the pool, the connection may be closed if the pool is inactive or has exceeded the max number of free connections
      Specified by:
      releaseConnection in interface ConnectionPool
      Parameters:
      con -
      Throws:
      SQLException
    • releaseConnectionOnError

      public void releaseConnectionOnError(Connection con) throws SQLException
      Description copied from interface: ConnectionPool
      Provide a mechinism to return a connection to the pool on Error. A good default behaviour is to close this connection and build a new one to replace it. Some JDBC impl's won't allow you to reuse a connection after an error occurs.
      Specified by:
      releaseConnectionOnError in interface ConnectionPool
      Parameters:
      con -
      Throws:
      SQLException
    • initializePool

      public void initializePool() throws IllegalArgumentException, SQLException
      Throws:
      IllegalArgumentException
      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.