Add events before and after handling bulk imports

[hyzx86]

Scene:

1. Process the data before bulk import
2. Batch update dynamic SQL indexes after batch import

I am using FreeSql as an ORM tool that supports dictionary type data insertion/update (including batch mode)
http://www.freesql.net/en/guide/insert-or-update.html#_2-ifreesql-insertorupdatedict

var dic = new Dictionary<string, object>();
dic.Add("id", 1);
dic.Add("name", "xxxx");

fsql.InsertOrUpdateDict(dic).AsTable("table1").WherePrimary("id").ExecuteAffrows();

related: #8869

[Skrypt]

I like it.

[ns8482e]

Isn't Importing runs before import and Imported runs after import already?

[hyzx86]

Isn't Importing runs before import and Imported runs after import already?

Existing code is triggered one by one. What I want is complete pre - and post-import data
It is convenient to handle the large amount of data to be imported in batches.
For example, we can use it to perform refresh Lucene indexes

[hyzx86]

related #13071

[Piedone]

You mention use case under https://github.com/OrchardCMS/OrchardCore/pull/11532/files#r1082149869 Wouldn't you add some to demonstrate how and why you'd use these new events?

[hyzx86]

link to #14630

[github-actions]

It seems that this pull request didn't really move for quite a while. Is this something you'd like to revisit any time soon or should we close? Please comment if you'd like to pick it up and remove the "stale" label.

[Piedone]

You didn't reply here: #11532 (review)

[hyzx86]

You didn't reply here: #11532 (review)

Hmmm. In my scenario, I'm just trying to optimise the speed of the import because I've done a function that maps to a table based on the content type definition, and it doesn't work on its own, so it becomes a question of how to design the example

[Piedone]

Aren't there use cases in OC itself?

[github-actions]

This pull request has merge conflicts. Please resolve those before requesting a review.

[Piedone]

@hyzx86 there's very little remaining here, please reply.

[MikeAlhayek]

for instructions on how to resolve the merge conflicts due to #16572 please follow the step listed in this comment.

[hyzx86]

@Piedone ， Sorry I've been busy lately and missed some information 😐
the github message notify are no longer prompted on the webpage after being read in the email. I tried to find the corresponding setting but couldn't

Aren't there use cases in OC itself?

I mean if I want to test this feature I need to add a default implementation of IBulkContentHandler，
How can I inject this implementation in the unit test?

[hyzx86]

Maybe I can test it this way?

 var cmanager =  (DefaultContentManager)contentManager;
 cmanager.BulkContentHandlers.add(new TestBulkContentHandler());
...

[Piedone]

I mean, isn't there a use case in Orchard Core where you'd add an IBulkContentHandler implementation? There is no existing code in OC that would utilize this already? If not, then OK.

[github-actions]

This pull request has merge conflicts. Please resolve those before requesting a review.