/// <summary>
/// This method is called before the result of a mutating operation
/// represented by the specified entry object is committed into the
/// underlying cache.
/// </summary>
/// <remarks>
/// An implementation of this method can evaluate the change by
/// analyzing the original and the new value, and can perform any of
/// the following:
/// <list type="bullet">
/// <item>
/// override the requested change by setting
/// <see cref="IInvocableCacheEntry.Value"/> to a different value;
/// </item>
/// <item>
/// undo the pending change by resetting the entry value to the
/// original value obtained from
/// <see cref="ICacheTriggerEntry.OriginalValue"/>
/// </item>
/// <item>
/// remove the entry from the underlying cache by calling
/// <see cref="IInvocableCacheEntry.Remove"/>
/// </item>
/// <item>
/// reject the pending change by throwing an <see cref="Exception"/>,
/// which will prevent any changes from being committed, and will
/// result in the exception being thrown from the operation that
/// attempted to modify the cache; or
/// </item>
/// <item>
/// do nothing, thus allowing the pending change to be committed to
/// the underlying cache.
/// </item>
/// </list>
/// </remarks>
/// <param name="entry">
/// An <see cref="ICacheTriggerEntry"/> object that represents the
/// pending change to be committed to the cache, as well as the
/// original state of the entry.
/// </param>
public virtual void Process(ICacheTriggerEntry entry)
{
if (entry.IsPresent && !InvocableCacheHelper.EvaluateEntry(m_filter, entry))
{
switch (m_action)
{
case ActionCode.Rollback:
default:
throw new ArgumentException("Rejecting " + entry +
" by trigger " + this);
case ActionCode.Ignore:
object value = entry.OriginalValue;
if (value != null || entry.IsOriginalPresent)
{
entry.SetValue(value, true);
}
else
{
entry.Remove(true);
}
break;
case ActionCode.Remove:
entry.Remove(true);
break;
}
}
}
public void Process(ICacheTriggerEntry entry)
{
SimplePerson person = (SimplePerson)entry.Extract(IdentityExtractor.Instance);
String sName = person.LastName;
String sNameUC = sName.ToUpper();
if (!sNameUC.Equals(sName))
{
person.LastName = sNameUC;
entry.SetValue(person, false);
}
}
