com.redhat.rhn.frontend.events

Class AbstractDatabaseAction

java.lang.Object

com.redhat.rhn.frontend.events.AbstractDatabaseAction

All Implemented Interfaces:

MessageAction

Direct Known Subclasses:

CloneErrataAction, NewCloneErrataAction, SsmChangeBaseChannelSubscriptionsAction, SsmChangeChannelSubscriptionsAction, SsmConfigFilesAction, SsmDeleteServersAction, SsmErrataAction, SsmPackagesAction, SsmPowerManagementAction, SsmSystemRebootAction, SsmVerifyPackagesAction, UpdateErrataCacheAction

public abstract class AbstractDatabaseAction
extends java.lang.Object
implements MessageAction

Base action for any action that communicates with the database. This class will take care of committing the transaction and any cleanup that is necessary.

Constructor Summary

Constructors

Constructor and Description
AbstractDatabaseAction()

Method Summary

Modifier and Type	Method and Description
protected abstract void	doExecute(EventMessage msg) Performs the business logic of the action.
void	execute(EventMessage msg) Perform the action on the EventMessage
protected void	handleTransactions(boolean commit) Commits the current thread transaction, as well as close the Hibernate session.

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractDatabaseAction

public AbstractDatabaseAction()

Method Detail

doExecute

protected abstract void doExecute(EventMessage msg)

Performs the business logic of the action. This method should be implemented instead of overriding execute(EventMessage).

Parameters:

msg - event being executed; will not be null

execute

public void execute(EventMessage msg)

Perform the action on the EventMessage

Specified by:

execute in interface MessageAction

Parameters:

msg - EventMessage to execute.

handleTransactions

protected void handleTransactions(boolean commit)

Commits the current thread transaction, as well as close the Hibernate session.

Note that this call MUST take place for any database operations done in a message queue action for the transaction to be committed.

Parameters:

commit - true if transaction should be committed. if false, it will be rolled back. It will also be rolled back if attempt to commit fails.