private bool VisitIndexAddCommand(IndexCommand command, EntityId entityId)
{
try
{
CommitContext context = CommitContext(command);
string key = _definitions.getKey(command.KeyId);
object value = command.Value;
// Below is a check for a null value where such a value is ignored. This may look strange, but the
// reason is that there was this bug where adding a null value to an index would be fine and written
// into the log as a command, to later fail during application of that command, i.e. here.
// There was a fix introduced to throw IllegalArgumentException out to user right away if passing in
// null or object that had toString() produce null. Although databases already affected by this would
// not be able to recover, which is why this check is here.
if (value != null)
{
context.EnsureWriterInstantiated();
context.IndexType.addToDocument(context.GetDocument(entityId, true).Document, key, value);
}
}
catch (ExplicitIndexNotFoundKernelException)
{
// Pretend the index never existed.
}
return(false);
}
public override bool VisitIndexRemoveCommand(IndexCommand.RemoveCommand command)
{
try
{
CommitContext context = CommitContext(command);
string key = _definitions.getKey(command.KeyId);
object value = command.Value;
context.EnsureWriterInstantiated();
CommitContext.DocumentContext document = context.GetDocument(new IdData(command.EntityId), false);
if (document != null)
{
context.IndexType.removeFromDocument(document.Document, key, value);
}
}
catch (ExplicitIndexNotFoundKernelException)
{
// Pretend the index never existed.
}
return(false);
}