net.customware.gwt.dispatch.server
Interface ActionHandler<A extends Action<R>,R extends Result>

All Known Implementing Classes:

AbstractActionHandler, BatchActionHandler, SimpleActionHandler

public interface ActionHandler<A extends Action<R>,R extends Result>

Instances of this interface will handle specific types of Action classes.

Author:

David Peterson

Method Summary

R	execute(A action, ExecutionContext context) Handles the specified action.
Class<A>	getActionType()
void	rollback(A action, R result, ExecutionContext context) Attempts to roll back the specified action.

Method Detail

getActionType

Class<A> getActionType()

Returns:

The type of Action supported by this handler.

execute

R execute(A action,
          ExecutionContext context)
                         throws DispatchException

Handles the specified action.

Type Parameters:

T - The Result type.

Parameters:

action - The action.

Returns:

The Result.

Throws:

DispatchException - if there is a problem performing the specified action.

rollback

void rollback(A action,
              R result,
              ExecutionContext context)
              throws DispatchException

Attempts to roll back the specified action.

Parameters:

action - The action.

result - The result of the action.

context - The execution context.

Throws:

DispatchException