Needed - Comet table

[Donald McLean]

Up to this point I've been using the JQuery plugin DataTables. It's a good piece of software, but it has limitations.

So does anyone have an implementation of a table where the data model is maintained on the server and the client gets real-time-ish updates via comet? With sorting and filtering?

Thanks,

Donald

[Diego Medina]

Hi Donald,

Many years ago I wrote this

http://blog.fmpwizard.com/blog/lift-comet-and-a-rest-api

which was about a grid like page that needed to get updates to individual cells. Those updates were done using comet.

It was just like a table, so maybe you can use some of that code. I didn't do any filtering or sorting though.

Also note that after I wrote that, we added the https://github.com/lift/framework/blob/master/web/webkit/src/main/scala/net/liftweb/http/NamedCometListener.scala and related files to Lift itself, I changed the names of some of the files bu the idea was the same. (this later part is only needed if there is another user or process that triggers the table to update, meaning, it crosses the session boundary).

Hope that helps.

Diego

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Diego Medina
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[Donald McLean]

Thanks, Diego.

While that's certainly a step in the right direction, it's far from what I am looking for. I guess I'll have to write something myself.

I was thinking of something more general purpose, where the developer supplies a few things, and the widget handles it:

1. A bunch of data, perhaps through a model implementing some trait

2. A high level format (# columns, appearance of table, columns, and rows), perhaps through several models implementing various traits

3. An API for wiring in controls (sorting, filtering, custom implemented with messages to data model)

4. A messaging protocol for the data model to notify the table when a change occurs so that a comet update can go to the client

I would seriously welcome any thought or suggestions here.

Thanks,

Donald

On Tue, Apr 5, 2016 at 11:53 PM, Diego Medina <di...@fmpwizard.com> wrote:

Hi Donald,

Many years ago I wrote this

http://blog.fmpwizard.com/blog/lift-comet-and-a-rest-api

which was about a grid like page that needed to get updates to individual cells. Those updates were done using comet.

It was just like a table, so maybe you can use some of that code. I didn't do any filtering or sorting though.

Also note that after I wrote that, we added the https://github.com/lift/framework/blob/master/web/webkit/src/main/scala/net/liftweb/http/NamedCometListener.scala and related files to Lift itself, I changed the names of some of the files bu the idea was the same. (this later part is only needed if there is another user or process that triggers the table to update, meaning, it crosses the session boundary).

[Antonio Salazar Cardozo]

This sounds like something that Angular probably provides… Or that there

is an Angular component for. If that's the case, you can probably try hooking

it up with lift-angular, which I gather is a pretty good integration.

Don't know much more than that, though, I'm afraid. I don't think it should be

too hard to integrate into existing client-side data-driven tables, but I also

haven't really used many such libraries.

Thanks,

Antonio

[Donald McLean]

Hi Antonio,

I'm really confused - when you say "lift-angular", what do you mean?

Thanks,

Donald

[Antonio Salazar Cardozo]

This library: https://github.com/joescii/lift-ng

Also, at risk of sounding impatient, it's the first result on google for the search "lift-angular", though on the other hand I misremembered the name :)
Thanks,
Antonio

[Donald McLean]

Thanks, Antonio.

I figured that's what you meant, but since that wasn't what you said, I just wanted to be sure.

Sent from my iPad

[Antonio Salazar Cardozo]

Got it :) Joe, the author, is a Lift committer and hangs around a good bit,

so if you have any questions just give a shout and hopefully he'll be able

to help!

Thanks,

Antonio

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[Joe Barnes]

Donald,

Definitely let us know if you try lift-ng and have any questions.  I hit a busy spell the past 3 or 4 weeks, so I've been a bit behind here on the ML. We've been using it to build partquest.com with a lot of success.  If client-side rendering and view-first development makes sense for your project, the Lift/Angular1 combo is quite powerful.

Joe

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[Donald McLean]

Hi Joe,

Thanks for reply.

As a matter of fact, it is the client side rendering that I think will be a problem. There are times when the model contains tens of thousands of records, sometimes as many as 150,000, and just transmitting the data to the client will crash the browser (yes, I tried it, just to see what would happen).

Unless there's another suggestion, it looks like I might have to write something myself, more or less from scratch.

Since I have different pages that all have the same problem, but have different data models, I'm thinking about doing something generic, as a Lift extension/library component.

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[Joe Barnes]

Wow, yeah that's a lot of data.  I would do some type of paging solution for that, regardless of where you render..

Joe

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[Antonio Salazar Cardozo]

For what it's worth, there are Angular components built for this; e.g.

http://swimlane.github.io/angular-data-table/ (see the “100K Rows”

example). Same goes for React; e.g. https://facebook.github.io/fixed-data-table/example-object-data.html .

Integrating all of that into Lift would be cool, of course, but it feels

like many of these components are already pretty generic. Either

way, look forward to what you come up with if you decide to build it

yourself :)

Thanks,

Antonio

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[Peter Petersson]

And there is also Angular UI Grid [1] although it "only" performs well with 10,000+ rows

[1] http://ui-grid.info/

best regards Peter Petersson