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From Karl Wright <>
Subject Re: [Io Activity] Doing an update inside a delete document
Date Wed, 02 Jul 2014 10:04:40 GMT
Hi Alessandro,

The "activities" metaphor is simply to make available appropriate framework
services to specific connector methods.  The metaphor is good for
ManifoldCF because it allows services to be added in new releases without
upsetting backwards compatibility etc.

If you have a "deleteDocument" implementation that is trying to call an
"addOrReplaceDocument" method, this can *only* work if the services you are
using in the addOrReplaceDocument method do not include any of those that
are not in IOutputDeleteActivity.  If that is the case, you should be able
to write a common method which accepts the appropriate common parent
interface of IOutputAddActivity and IOutputDeleteActivity.  If not, you
will have to rethink how you are doing this.


On Wed, Jul 2, 2014 at 5:17 AM, Alessandro Benedetti <> wrote:

> Hi guys,
> I'm trying to implement a specific logic in a custom output connector
> where, under specific conditions, in the deleteDocument method is then
> called an AddOrUpdate method.
> This can happen when the deletion of a document  causes the update of other
> documents already indexed.
> I know is a very specific use case, but let's see if there is a solution
> ...
> So far no problem until I reach the Activities management ...
> I found the hierarchy of this objects really confusing, with a lot of
> interfaces and different inner classes sparse in the code.
> Furthermore it appears to be really hard to create an *IOutputAddActivity*
> object where you have a IOutputDeleteActivity.
> What can be the best way to instantiate correctly an
> *IOutputAddActivity *inside
> the DeleteDocument method *?*
> Why this activities objects that seems a sort of logging/tracking feature
> is such coupled with the logic ?
> Thank's for the help
> --
> --------------------------
> Benedetti Alessandro
> Visiting card :
> "Tyger, tyger burning bright
> In the forests of the night,
> What immortal hand or eye
> Could frame thy fearful symmetry?"
> William Blake - Songs of Experience -1794 England

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