uk.ac.ebi.intenz.webapp.controller
Class DatabaseCommand

java.lang.Object
  uk.ac.ebi.intenz.webapp.controller.Command
      uk.ac.ebi.intenz.webapp.controller.DatabaseCommand

Direct Known Subclasses:

SearchCommand, SearchECCommand, SearchIDCommand, SearchPreliminaryCommand, SearchProposedCommand, UnknownDatabaseCommand

public abstract class DatabaseCommand
extends Command

A database command always relies on a connection to the database.

Version:

0.9 - 21-July-2003

Author:

Michael Darsow

Field Summary

protected Connection	con
protected javax.servlet.ServletContext	context
protected String	databaseErrorMessage
protected EnzymeEntryMapper	enzymeEntryMapper
protected javax.servlet.http.HttpServletRequest	request
protected javax.servlet.http.HttpServletResponse	response

Constructor Summary

DatabaseCommand()

Method Summary

protected void	close()
protected void	closeConnection() Closes the database connection or forwards to an error page if any error occured.
protected void	finalize()
protected void	forward(String target) Forwards to the given target.
void	init(javax.servlet.ServletContext context, javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response, Connection con) Initialises the attributes which will be used to extract information for the command execution.

Methods inherited from class uk.ac.ebi.intenz.webapp.controller.Command

process

Methods inherited from class java.lang.Object

clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

databaseErrorMessage

protected final String databaseErrorMessage

See Also:

Constant Field Values

context

protected javax.servlet.ServletContext context

request

protected javax.servlet.http.HttpServletRequest request

response

protected javax.servlet.http.HttpServletResponse response

con

protected Connection con

enzymeEntryMapper

protected final EnzymeEntryMapper enzymeEntryMapper

Constructor Detail

DatabaseCommand

public DatabaseCommand()

Method Detail

init

public void init(javax.servlet.ServletContext context,
                 javax.servlet.http.HttpServletRequest request,
                 javax.servlet.http.HttpServletResponse response,
                 Connection con)

Initialises the attributes which will be used to extract information for the command execution.

Parameters:

context - The servlet context.

request - The request object.

response - The response object.

con - A logical connection.

forward

protected void forward(String target)
                throws javax.servlet.ServletException,
                       IOException

Forwards to the given target.

Parameters:

target - A valid URI.

Throws:

javax.servlet.ServletException

IOException

closeConnection

protected void closeConnection()
                        throws javax.servlet.ServletException,
                               IOException

Closes the database connection or forwards to an error page if any error occured.

Throws:

javax.servlet.ServletException

IOException

close

protected void close()

finalize

protected void finalize()
                 throws Throwable

Overrides:

finalize in class Object

Throws:

Throwable