[dart-misc] LevelDB support in Dart

[Jon Brisbin]

I couldn't find anything extant to use LevelDB from Dart and a quick answer
on StackOverflow confirmed my suspicions: there is no LevelDB support from
Dart. That's odd considering they're both Google initiatives--but I can
understand that priorities are somewhat different. IMO good LevelDB support
would be a huge win for server-side Dart. I'm not a C++ programmer myself,
so I wouldn't trust the code I would attempt to write to create an async
port that uses LevelDB's C++ API. I'm sure I could muddle through but I'm
just not sure I have the time or willpower.

Since I can't find any other questions about LevelDB here in this group, I
assume no one has yet discussed what form this integration should take and
what such a Dart API would look like?

['Justin Fagnani' via Dart Misc]

Post by Jon Brisbin
I couldn't find anything extant to use LevelDB from Dart and a quick
answer on StackOverflow confirmed my suspicions: there is no LevelDB
support from Dart. That's odd considering they're both Google initiatives

It's not really that odd. They're a different team, and it's not like every
team at Google rushes out and creates clients in Go and Dart immediately
just because they're Google created languages. There's gradual uptake that
happens inside Google, just like there is outside of it, so it takes time
for someone to come around to needing something like this, especially since
we're really just getting started with server-side Dart.

Post by Jon Brisbin
--but I can understand that priorities are somewhat different. IMO good
LevelDB support would be a huge win for server-side Dart. I'm not a C++
programmer myself, so I wouldn't trust the code I would attempt to write to
create an async port that uses LevelDB's C++ API. I'm sure I could muddle
through but I'm just not sure I have the time or willpower.

Is there a LevelDB group you could maybe get help from?

Post by Jon Brisbin
Since I can't find any other questions about LevelDB here in this group, I
assume no one has yet discussed what form this integration should take and
what such a Dart API would look like?

Not that I know of. I assume it'd look something like IndexedDB or the
other database packages - the good ones have used Futures and Streams to
make idiomatic APIs. I see that the LevelUP package for Node is
synchronous, I'd probably suggest that a Dart API be asynchronous.

Cheers,
Justin

--

Post by Jon Brisbin
For other discussions, see https://groups.google.com/a/dartlang.org/
For HOWTO questions, visit http://stackoverflow.com/tags/dart
To file a bug report or feature request, go to http://www.dartbug.com/new
To unsubscribe from this group and stop receiving emails from it, send an

[Jon Brisbin]

On September 25, 2014 at 2:19:04 PM, 'Justin Fagnani' via Dart Misc (***@dartlang.org) wrote:

 
--but I can understand that priorities are somewhat different. IMO good LevelDB support would be a huge win for server-side Dart. I'm not a C++ programmer myself, so I wouldn't trust the code I would attempt to write to create an async port that uses LevelDB's C++ API. I'm sure I could muddle through but I'm just not sure I have the time or willpower. 

Is there a LevelDB group you could maybe get help from?


I’m not currently part of one but I’m sure there’s help to be had there




 

Since I can't find any other questions about LevelDB here in this group, I assume no one has yet discussed what form this integration should take and what such a Dart API would look like?

Not that I know of. I assume it'd look something like IndexedDB or the other database packages - the good ones have used Futures and Streams to make idiomatic APIs. I see that the LevelUP package for Node is synchronous, I'd probably suggest that a Dart API be asynchronous.


I agree. I’m all about reactive, async patterns! :)

I’ve been looking into the async port API for Dart and it does look reasonably straightforward. The hard part is really going to be getting the C part correct since that’s a bit of an unknown to me.



Thanks!

Jon Brisbin
http://jbrisbin.com
@JonBrisbin | @mformonochrome





Cheers,
  Justin

--
For other discussions, see https://groups.google.com/a/dartlang.org/
 
For HOWTO questions, visit http://stackoverflow.com/tags/dart
 
To file a bug report or feature request, go to http://www.dartbug.com/new
To unsubscribe from this group and stop receiving emails from it, send an email to misc+unsubscribe-dYxm/***@public.gmane.org

--
For other discussions, see https://groups.google.com/a/dartlang.org/
 
For HOWTO questions, visit http://stackoverflow.com/tags/dart
 
To file a bug report or feature request, go to http://www.dartbug.com/new
To unsubscribe from this group and stop receiving emails from it, send an email to misc+unsubscribe-dYxm/***@public.gmane.org

[George Moschovitis]

Post by Jon Brisbin
I couldn't find anything extant to use LevelDB from Dart

I could also find good uses for such a packages, but I also have no
time/willpower to write a native extension :(

[Daniel Morilha]

I've been playing with the bindings this weekend. There is still a lot to
be done. Feel free to fork and contribute.

Thanks,

https://github.com/dmorilha/dart-leveldb

On Fri, Sep 26, 2014 at 5:39 AM, George Moschovitis <

Post by Jon Brisbin
I couldn't find anything extant to use LevelDB from Dart
I could also find good uses for such a packages, but I also have no
time/willpower to write a native extension :(
--
For other discussions, see https://groups.google.com/a/dartlang.org/
For HOWTO questions, visit http://stackoverflow.com/tags/dart
To file a bug report or feature request, go to http://www.dartbug.com/new
To unsubscribe from this group and stop receiving emails from it, send an

--
Daniel Morilha (dmorilha-***@public.gmane.org)

[John Hewson]

dmorilha, looks like a good start. One thought: to be usable in a Dart web server the bindings will need to be asynchronous.

-- John

[Filipe Morgado]

Hey guys,

I would definitely consider such a library.

I have nothing helpful to add except for a suggestion.

Maybe use RocksDB <http://rocksdb.org/> instead?
It originally forked from LevelDB, improved a lot of stuff (way better
concurrency, fast storage optimizations, etc) and is actively developed.

LevelDB seems pretty stall <https://code.google.com/p/leveldb/source/list>.

[Jon Brisbin]

RocksDB looks very intriguing!

I really wish I was a C++ programmer because I would love to dig into creating a Dart Stream-based API around this kind of high-performance K/V store. The RocksDB API actually does look easier to grok than LevelDB. It would be a good choice for an async and Stream-based package.


Thanks!

Jon Brisbin
http://jbrisbin.com
@JonBrisbin | @mformonochrome


On October 1, 2014 at 5:00:57 AM, Filipe Morgado (pixevil-***@public.gmane.org) wrote:

Hey guys,

I would definitely consider such a library.

I have nothing helpful to add except for a suggestion.

Maybe use RocksDB instead?
It originally forked from LevelDB, improved a lot of stuff (way better concurrency, fast storage optimizations, etc) and is actively developed.

LevelDB seems pretty stall.
--
For other discussions, see https://groups.google.com/a/dartlang.org/
 
For HOWTO questions, visit http://stackoverflow.com/tags/dart
 
To file a bug report or feature request, go to http://www.dartbug.com/new
To unsubscribe from this group and stop receiving emails from it, send an email to misc+unsubscribe-dYxm/***@public.gmane.org

[Adam Lofts]

I have written a LevelDB binding for the Dart VM. It is fully async and
uses a Stream for iterating over key/value pairs in the database so you can
use an await for loop.

The api is modelled on the Node.js bindings (LevelUP) which are mature so I
don't expect huge changes.

The github link is here: https://github.com/adamlofts/leveldb_dart

I am unable to upload it to pub because I don't think pub supports dart
native extensions.

Adam

Post by Jon Brisbin
RocksDB looks very intriguing!
I really wish I was a C++ programmer because I would love to dig into
creating a Dart Stream-based API around this kind of high-performance K/V
store. The RocksDB API actually does look easier to grok than LevelDB. It
would be a good choice for an async and Stream-based package.
Thanks!
Jon Brisbin
http://jbrisbin.com
@JonBrisbin | @mformonochrome
Hey guys,
I would definitely consider such a library.
I have nothing helpful to add except for a suggestion.
Maybe use RocksDB <http://rocksdb.org/> instead?
It originally forked from LevelDB, improved a lot of stuff (way better
concurrency, fast storage optimizations, etc) and is actively developed.
LevelDB seems pretty stall <https://code.google.com/p/leveldb/source/list>
.
--
For other discussions, see https://groups.google.com/a/dartlang.org/
For HOWTO questions, visit http://stackoverflow.com/tags/dart
To file a bug report or feature request, go to http://www.dartbug.com/new
To unsubscribe from this group and stop receiving emails from it, send an