Lift 3 release date

Antonio Salazar Cardozo

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Oct 14, 2016, 5:21:10 PM10/14/16

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Hey there folks,

Barring any additional issues found, we're planning on promoting RC4 to

be the Lift 3.0.0 release on the week of November 4th. As such, please

let us know if you're facing any additional showstopper issues in this RC.

Otherwise, we look forward to closing out this seemingly interminable release

cycle and moving forward with a quicker 3.1 cycle :)

Thanks,

Antonio

Saiki Tanabe

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Oct 18, 2016, 11:03:59 AM10/18/16

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Hey there,

Been running Lift 3 RC 4 on production, and it is working really well. There is one corner case that keeps coming. It is not especially related for RC 4, but generally Lift 3. Now that custom javascript is loaded from a separate javascript file generated for each session.

Building a service where users keep pages open for a very long time. After a while of user inactivity javascript file is not found from the server due to e.g. closing a laptop lid. Session on the server for the user has expired. Chrome developer console shows

Failed to load resource /lift/page/F798761692508K2IZIH.js: the server responded with a status of 404 ()

User can fix this problem by pressing refresh button, then page refers an updated javascript file name. It would be really great if page would be automatically reloaded in this situation. Any ideas how this could be achieved?

Saiki

Antonio Salazar Cardozo

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Oct 18, 2016, 11:05:36 AM10/18/16

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Hmmm… Not 100% clear on when this happens yet. So this happens when a

user navigates to a page and immediately closes their laptop, thus preventing

the page from loading completely? Or is it slightly different?

Thanks,

Antonio

Antonio Salazar Cardozo

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Oct 18, 2016, 11:11:45 AM10/18/16

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Separately from understanding when this happens, there is a straightforward way

to customize the behavior of the page JS. That's because the page JS handler is

just a standard dispatch function that Lift attaches in LiftRules. It's defined in this bit

of LiftJavaScript. So, for now, you should be able to add your own dispatch function

that catches the same situation and returns some page reload JS. As long as you

append to `LiftRules.dispatch`, your response should only fire if no page JS is found

through the regular mechanism.

Let me know if you need more than that!

Thanks,

Antonio

Saiki Tanabe

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Oct 18, 2016, 12:23:21 PM10/18/16

to Lift

Thanks, will try out if this would solve this!

...

case LiftPath :: "page" :: renderVersion(version) :: Nil => {

// not found case

logger.error("page js version not found %s reloading the page".format(version))

Some(JavaScriptResponse(js.JsCmds.Reload))

}

...

The case goes like this, and most probably needs at least 2 browser tabs opened to different pages

1. user opens a page(s)

2. user interacts normally with the page(s)

3. at some point user closes laptop lid e.g. after 20 minutes after interacting with the page(s)

4. user opens laptop lid, let's say 1 hour later (after user session has expired)

5. one tab reloads page correctly with updated page js, but the other browser tab doesn't do full page reload... or gets for some reason non existing page js file reference

Saiki

Antonio Salazar Cardozo

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Oct 19, 2016, 2:03:31 PM10/19/16

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Hmmm, this is very interesting… And smells like a race condition in the session regeneration. If

this is something that is reproducible in a small test project, I would love to sink my teeth into it

once 3.0 gets out the door.

Thanks,

Antonio

Saiki Tanabe

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Oct 28, 2016, 1:17:55 AM10/28/16

to Lift

Thanks again, the code snippet now solves this problem! User experience is really nice when page can reload itself when page js version is not found.

One small problem is that snippet dispatcher gets executed relatively often. Below is an example logging for it. I'll try to look at some point if this is reproducible on a small test project.

...

02:48:00.089 [qtp38997010-197874] ERROR bootstrap.liftweb.Boot - page js version not found F961442348320FR2DHS reloading the page

02:48:00.568 [qtp38997010-197125] ERROR bootstrap.liftweb.Boot - page js version not found F961442348376WSBCDM reloading the page

02:48:02.604 [qtp38997010-196219] ERROR bootstrap.liftweb.Boot - page js version not found F961442348453NEZQHS reloading the page

02:48:03.613 [qtp38997010-186822] ERROR bootstrap.liftweb.Boot - page js version not found F961442348539M4QBSV reloading the page

02:48:04.443 [qtp38997010-197125] ERROR bootstrap.liftweb.Boot - page js version not found F961442348619WQ3NUF reloading the page

02:48:05.659 [qtp38997010-197855] ERROR bootstrap.liftweb.Boot - page js version not found F961442348695L3315G reloading the page

02:48:06.738 [qtp38997010-197855] ERROR bootstrap.liftweb.Boot - page js version not found F961442348798S5XHMG reloading the page

02:48:07.927 [qtp38997010-191849] ERROR bootstrap.liftweb.Boot - page js version not found F961442348897VDRCUR reloading the page

02:48:08.978 [qtp38997010-191849] ERROR bootstrap.liftweb.Boot - page js version not found F961442348984CCSK5W reloading the page

02:48:09.962 [qtp38997010-191849] ERROR bootstrap.liftweb.Boot - page js version not found F961442349073TBFWB5 reloading the page

02:48:10.850 [qtp38997010-196169] ERROR bootstrap.liftweb.Boot - page js version not found F961442349162YZE5T3 reloading the page

02:48:11.964 [qtp38997010-186822] ERROR bootstrap.liftweb.Boot - page js version not found F961442349267MXOPFZ reloading the page

02:48:11.965 [qtp38997010-186822] ERROR bootstrap.liftweb.Boot - page js version not found F961442349267MXOPFZ reloading the page

02:48:12.743 [qtp38997010-196169] ERROR bootstrap.liftweb.Boot - page js version not found F961442349368VAXJYT reloading the page

02:48:13.828 [qtp38997010-189862] ERROR bootstrap.liftweb.Boot - page js version not found F961442349472QNVQ1C reloading the page

02:48:13.829 [qtp38997010-189862] ERROR bootstrap.liftweb.Boot - page js version not found F961442349472QNVQ1C reloading the page

...

Saiki

Antonio Salazar Cardozo

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Nov 1, 2016, 8:13:32 AM11/1/16

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How often is relatively often? Multiple times for a single page load? I would

expect it to run once for a page JS load and then be done.

Thanks,

Antonio

Diego Medina

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Nov 9, 2016, 9:24:19 PM11/9/16

to Lift

We said we would release Lift 3.0 final this week, but Scala 2.12 was recently released, do we wait for it and only ship jars for 2.12 or do we, from the start, support 2.11.x and then 2.12?

Thanks

Diego

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Matt Farmer

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Nov 10, 2016, 10:10:50 AM11/10/16

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I think we support 2.11 and 2.12 from the start.

—
Matt Farmer | Blog | Twitter
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Antonio Salazar Cardozo

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Nov 10, 2016, 10:12:21 AM11/10/16

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I’d say we ship Lift 3 very soon (I need to actually finish putting together the

release notes <_<) and then do a separate release with 2.12 support, perhaps

3.0.1 or even just push 2.12 artifacts for 3.0. There’s an outstanding PR

that sets the base for implementing the necessary changes to the build, but

it needs a bit of love still, and I haven’t had a chance to look at it.

I don’t think actually delaying the 3.0 release for 2.12 support is worth it,

though, personally.

Thanks,

--

Antonio Salazar Cardozo

On twitter @lightfiend

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Diego Medina

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Nov 10, 2016, 10:48:20 AM11/10/16

to Lift

sounds good, so, are we ready for a 3.0 final build? :) If I don't hear any -1 , I'll build it this weekend

On Thu, Nov 10, 2016 at 10:12 AM, Antonio Salazar Cardozo <savedf...@gmail.com> wrote:

I’d say we ship Lift 3 very soon (I need to actually finish putting together the
release notes <_<) and then do a separate release with 2.12 support, perhaps
3.0.1 or even just push 2.12 artifacts for 3.0. There’s an outstanding PR
that sets the base for implementing the necessary changes to the build, but
it needs a bit of love still, and I haven’t had a chance to look at it.

I don’t think actually delaying the 3.0 release for 2.12 support is worth it,
though, personally.
Thanks,

--
Antonio Salazar Cardozo
On twitter @lightfiend

On Nov 10, 2016, at 10:10, Matt Farmer <ma...@frmr.me> wrote:

I think we support 2.11 and 2.12 from the start.

—
Matt Farmer | Blog | Twitter
GPG: CD57 2E26 F60C 0A61 E6D8 FC72 4493 8917 D667 4D07

On Nov 9, 2016, at 9:24 PM, Diego Medina <di...@fmpwizard.com> wrote:

We said we would release Lift 3.0 final this week, but Scala 2.12 was recently released, do we wait for it and only ship jars for 2.12 or do we, from the start, support 2.11.x and then 2.12?

Thanks

Diego

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Antonio Salazar Cardozo

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Nov 10, 2016, 10:51:57 AM11/10/16

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I say yes!

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Antonio Salazar Cardozo

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Matt Farmer

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Nov 10, 2016, 10:53:03 AM11/10/16

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Peter Petersson

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Nov 10, 2016, 11:34:25 AM11/10/16

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+1

I say yes!

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Tim Nelson

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Nov 11, 2016, 5:34:27 AM11/11/16

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+1

+1

I say yes!

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Diego Medina
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di...@fmpwizard.com
http://blog.fmpwizard.com/

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