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https://issues.apache.org/jira/browse/LUCENENET-565?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16119708#comment-16119708
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ASF GitHub Bot commented on LUCENENET-565:
------------------------------------------
Github user NightOwl888 commented on the issue:
https://github.com/apache/lucenenet/pull/209
Jens, thanks for the feedback.
While I generally agree with your points, we are unfortunately obligated to
work within the confines of the Apache organization, which comes with its own
set of conditions. For one, there is a [formal release
process](http://www.apache.org/legal/release-policy.html) we need to abide by
(including a vote process that takes a minimum of 3 days per release), and I am
not sure what is involved in setting up another Apache repo (nor am I sure I
really want to go down that rabbit hole).
That said, we could follow the [Lucene
project's](https://github.com/apache/lucene-solr) example with their separate
release cycles of Lucene and SOLR: put everything into one repo and use
separate tag names for each product. At least they started out that way - now
they are releasing both products at the same time.
It probably makes sense, though. If we have a release vote on both product
A and product B and product B depends on product A, and product A doesn't pass
the release vote, then product B will be stalled anyway.
Of course, there is an alternative - build these integration packages
outside of Apache's umbrella. But I am not sure what Apache's policy is in this
regard (anyone?). Given the current situation with Spatial4n and LuceneNetDemo
being on Itamar's personal account and no ability to push to them without being
given special permission (by Itamar), and the fact that most of the projects on
NuGet that depend on Lucene.Net are either dead or dying, it feels like this
idea could go wrong as well. Sure, it is feasible for a huge team like
Microsoft to do this, but trying to pull this off with a small team probably
isn't very realistic.
Not to mention, platform support. With the release of .NET Standard 2.0
looming, we are looking at a sweeping update that will hit every project. And
what of .NET Standard 2.5 when that is eventually released? As much as
Microsoft has promised by creating .NET Standard, we still have some branching
between platforms we need to maintain, although it isn't as bad as if we were
trying to use a portable library. Now, multiply that update by the number of
repos that we would have to update (each with their own ever diverging build
script)...and we have a huge pile of work.
But I will take this into consideration. Perhaps after a few releases that
are synced up, we can put together a new template in TeamCity so each of these
integration packages can have their own release cycle. But since the team of
active PMC members is so small, finding the 3 votes necessary for every one of
those separate releases might not be very realistic. Our last beta vote had
exactly the minimum 3 votes that were required (including my own).
> Also, your already on the edge of making some decisions that would be bad
for larger scale projects... E.g. making a Singleton LuceneWriter (registered
in a IoC Container or not) wouldn't that limit you to only having a single
index?... that would seem like an odd direction to consider within this context
as the Replicator directly supports shards... (aka multiple indexes?)
Actually, I was planning to make an API to be able to register multiple
IndexWriters or IndexReaders at application startup as singleton. Something
along the lines of...
```
services.AddSearch().WithIndex(...).WithIndex(...)
```
But the fact remains that the recommendation is to use a singleton
IndexWriter (or Reader) per index, meaning if we didn't provide the tools do it
with a simple straightforward API, everyone would end up having to do the
research how to do it and write the same boilerplate code. And a lot of them
would assume they could create an IndexReader instance on each request (or
register it with the wrong lifetime) and find out just how poorly that performs.
I need to explore exactly how this can work in a way that doesn't block
people from doing it their own way, providing all of the overloads that allow
pre-built implementations to be passed in as an alternative to using fluent
builders. But regardless of how you slice it, setting up an index reader or
writer belongs in the application startup phase and nowhere else, although you
need to access those instances at runtime (again best solved with DI).
Microsoft is providing a standard way for doing this in their latest UI
frameworks and it would be a real shame not to take advantage of this fact.
> As a final note, I won't be able to find time to take the
Lucene.Net.Replicator.AspNetCore project much further, my goal was to focus on
Lucene.Net.Replicator it self and provide a meaningful port of that that could
be integrated into AspNetCore (which we haven't even adopted yet), AspNet4x,
Nancy or similar frameworks with relative ease...
> Which path you take with Lucene.Net.Replicator.AspNetCore is up to you...
But I don't feel right about building anything two involved for a
framework/platform I don't even use and therefore don't know all the ins and
outs of...
No problem. Your contribution is much appreciated.
> To me it was an example integration that could help me find points in the
Lucene.Net.Replicator which might cause difficulty when integrating or straight
out felt wrong and there are a few things about the ReplicatorService that
annoys me in that regard, but there is a broader picture as the HttpReplicator
aligns to that same theme and then there is your desire to stay compatible with
Java versions, which is questionably because they choose to actually serialize
Exception objects, if java clients expect any meaning of that then we are not
compatible at all as all Exceptions would end up as "Unknown Exceptions" in a
Java client... and that goes for the other way around as well...
I see. You are right that it might not entirely interoperate with the Java
version (at least not if there are exceptions), but at least we have explored
that option and came to this conclusion.
> I do have a small super simplistic and extremely crude DEMO AspNetCore
app that indexes and publishes data and then a Console client that pulls the
replicas which works. I am trying to use this to weed out annoyances.
Cool. Just let me know when you are ready to hand over the reigns. I am
still exploring whether I can make API docs part of the upcoming beta release.
I would also like to tinker with getting replicator working in a demo
setup. Perhaps you can put the demo project in a separate repo? When you are
ready, that is.
> Port Lucene.Net.Replicator
> --------------------------
>
> Key: LUCENENET-565
> URL: https://issues.apache.org/jira/browse/LUCENENET-565
> Project: Lucene.Net
> Issue Type: Task
> Components: Lucene.Net.Replicator
> Affects Versions: Lucene.Net 4.8.0
> Reporter: Shad Storhaug
> Priority: Minor
> Labels: features
>
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