Re: Not-sticky sessions with Sling?

[lancedolan]

Alright, this is a deal breaker for our business (if sling absolutely
requires sticky sessions). I hope you're not offended that I'm not 100%
convinced yet. I understand you do development on the sling project and are
well qualified on the topic. To be honest, however, I don't understand fully
what you said in your last post and I also know that AEM 6.1 can do what I'd
like, which is really just Sling+Oak. If they can do it, I don't understand
why we can't.

ref:
https://docs.adobe.com/docs/en/aem/6-1/administer/security/encapsulated-token.html

I'd hate to throw away all the awesome progress we've made with Sling so far
when I know that AEM, which is just sling + jackrabbit, can accomplish
app-server-agnostic authentication, and thus avoid sticky sessions.

Although I don't understand this "head revision" that you've described, and
that's inexperience on my part, I am confident that you're telling me that
when there is only one Mongo instance in existence, and all Sling instances
get data from it, that directly after "sling-instance-1" writes
"myProperty=myValue" to the JCR, then "sling-instances-2" could get the
value of "myProperty" from somewhere else - some old value. This only seems
possible to me if one of the following is true:

A) the Sling instances are caching values from Mongo (perhaps Sling or Oak
is doing that?) 
B) There are separate versions of that property stored in Mongo (perhaps
this is what you meant by the word revision) and it's possible for a
sling-instance to be reading an old version of a property from Mongo.
C) Mongo isn't consistent.

We know from mongo documentation that C isn't true - Mongo is consistent
when reading from the primary replica set. So it must be that A or B is
going on? And if so, what is your guess about how AEM 6, which is Sling+Oak,
avoids this pitfall when they very clearly support the stateless
architecture  (ie not-sticky) that I'm planning?




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Re: uses for Sling

[Guillaume Lucazeau]

Hello Jason,

We used it for an extranet for sales people. The company has different
brands, each brands contains different products and then the country is
divided in regions, sectors and target units. The nodes tree was then
convenient for this data structure. We have then different "documents"
(nodes) which contains "pages" and "components" (also nodes, like text
components, images, tables etc). A document is pre-filled by the management
with some data (charts, goals etc.), then for some component each user can
provide its own data (for instance update the text of a text component).

We found Sling useful because we don't have to architecture the data
structure for future components. Let's say we want to provide a Youtube
component that will display a Youtube video in the document, we just create
a new node with Sling:resourceType = myapp/component/youtube, set the video
URL, and add a specific view for this component. Before, it was all stored
in a database and not very flexible.

The front is just an Angular site sending requests to the Sling REST API,
as it's ready to use. Users/groups and privileges management was also a
good point as it's also ready to use and flexible. We didn't develop a lot
of things for content management. I was a complete Sling newbie at the
beginning of the project but with some spamming to the mailing list it
worked pretty well.

As lots of documents have the same skeleton, we just created a tool to do
bulk updates on nodes but that's pretty much it.

Regards,
Guillaume


On Fri, Jan 13, 2017 at 4:28 PM, Jason Bailey  wrote:

> I know that Sling is used for 2 downstream CMS applications.
> I was wondering if anyone could share other use cases that they have found
> Sling to be useful for.
>
> Thanks.
>

uses for Sling

[Jason Bailey]

I know that Sling is used for 2 downstream CMS applications.
I was wondering if anyone could share other use cases that they have found 
Sling to be useful for.

Thanks.

Re: How to change run mode in Sling8

[Bertrand Delacretaz]

Hi Lance,

On Fri, Jan 13, 2017 at 1:54 AM, lancedolan  wrote:
> ...It's just some text files that neatly describe
> which OSGI bundles and configurations (including run modes) you'd like
> present in a new .war file which is then built using *actual* sling
> artifacts from completely different projects

Indeed!

There are some docs about this at
https://sling.apache.org/documentation/development/slingstart.html
(and patches welcome on that as usual)

-Bertrand