These are interesting code listings and questions, but they conflate the
syntactic detail that core.async's go is implemented as a macro, with the
semantic intention to support designs around lightweight data flow between
independent code blocks.
It might be of value to check out Go, the language,
What if I want to run a select query in the middle of a transaction?
On Thursday, August 1, 2013 3:33:29 AM UTC+9, tbc++ wrote:
>
> DB work is a IO operation, and IO shouldn't be done inside a go block (go
> blocks use limited thread pools).
>
> So what about something like this?
>
> (defn handl
On Wed, Jul 31, 2013 at 10:58 AM, Alice wrote:
> It doesn't produce a compile time error but I think it's not the correct
> code because the transaction can be committed while insert-async! is still
> executing.
Right. I was just showing how to avoid the compile error (because you
need http://cor
(defn insert-async!
[& args]
(db-thread
(try
(apply jdbc/insert! args)
(catch Throwable t
t
db-thread is a macro that runs the body in a fixed thread pool, so IO isn't
done inside a go block.
On Thursday, August 1, 2013 3:33:29 AM UTC+9, tbc++ wrote:
>
> DB work i
DB work is a IO operation, and IO shouldn't be done inside a go block (go
blocks use limited thread pools).
So what about something like this?
(defn handle-db [chan]
(thread
(while true
(let [[data result] (! result :done)
Now spin up a few of these:
(def db-chan (let [c (chan 4)
I have an async http handler and I don't want it to consume a thread.
On Thursday, August 1, 2013 3:16:52 AM UTC+9, tbc++ wrote:
>
> Why not use
> Timothy
>
>
> On Wed, Jul 31, 2013 at 11:58 AM, Alice >wrote:
>
>> It doesn't produce a compile time error but I think it's not the correct
>> code
Why not use wrote:
> It doesn't produce a compile time error but I think it's not the correct
> code because the transaction can be committed while insert-async! is still
> executing.
>
> On Thursday, August 1, 2013 2:46:29 AM UTC+9, Sean Corfield wrote:
>
>> On Wed, Jul 31, 2013 at 10:29 AM, Ali
It doesn't produce a compile time error but I think it's not the correct
code because the transaction can be committed while insert-async! is still
executing.
On Thursday, August 1, 2013 2:46:29 AM UTC+9, Sean Corfield wrote:
>
> On Wed, Jul 31, 2013 at 10:29 AM, Alice >
> wrote:
> > (go
> >
On Wed, Jul 31, 2013 at 10:29 AM, Alice wrote:
> (go
> (jdbc/db-transaction [t-con db-spec]
> (http://corfield.org/
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"Perfection is the enemy of the good."
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(defonce ^ExecutorService db-thread-pool (Executors/newFixedThreadPool 8))
(defn db-thread-call
[f]
(let [c (chan 1)]
(.execute db-thread-pool
(fn []
(let [ret (try
(f)
(catch Throwable t
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