Hi Malcolm, me again :-)
I've been using (and loving) jig now for quite some time and have reached
the point where I want to start using my code in a production environment.
There are several things that need to get fixed though, most importantly:
1) Testing. Have you by any chance thought
Just a small follow up, in the mean time I did manage to get the code
running as daemon using Tanuki's service wrapper by setting the
wrapper.working.dir to the main project's root.
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Got it! :-)
One more thing. While developing, I often have to deal with large amounts
of data that take quite a while to load. However, the data is lost and so
has to be reloaded after every reset, which is a bit annoying. Is there a
way to prevent this?
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It's a nice idea to load your schema and data on every reset, if you can.
But if you need to, place you data anywhere under the :safe key in the
system map and it will survive a reset.
On 18 Mar 2014 15:57, Joachim De Beule joachim.de.be...@gmail.com wrote:
Got it! :-)
One more thing. While
Hi Joachim,
What you're describing is a dynamic system map, whereas the current pattern
as described by Stuart in his classic blog post
http://thinkrelevance.com/blog/2013/06/04/clojure-workflow-reloadeddescribes
a static system map which is established at the beginning of a
reset cycle and
Dear Malcolm.
I'm still having trouble seeing the intended flow, and I have the feeling
I'm missing something.
My first question is why I would create two separate components C and A,
instead of just having one component A that both installs a channel in the
system map and starts a thread
update: I made mistake at the end of my previous post: I mean that the db
component does NOT sufficiently encapsulate the internals of course...
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Hi Joachim,
I suggest you create a component, C, that assocs a channel in the system
map.
Now create a component, A that depends on C. A should start and stop a
thread in the usual start/stop Lifecycle. The component should get the
channel from the system map. The thread should check the
Thanks so much for your suggestions Malcolm, very helpful and illuminating!
Joachim.
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Hi Malcolm,
I have a follow up question if you don't mind. Suppose I want to define a
component that starts a thread and regularly checks a resource. If the
resource changes, this has repercussions for other (dependent)
components. How would you do that in jig?
Maybe this question is too
Op maandag 21 oktober 2013 02:41:43 UTC+2 schreef frye:
Also, is there a Google Group for Jig? I'm playing around with it, can see
the potential, and already have some questions.
+1 for the google group ..
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Hi Joachim
The component lifecycle protocol is used to group together the init, start
and stop functions tied to ephemeral services common to many Java
server-side applications. I'm not sure it makes sense for components to
satisfy other protocols that are functional in nature, as this invite
Hi Malcolm,
Thank you for your very helpful reply!
Indeed, I've also been thinking about database components, elasticsearch
components, memcache components and so on that all are async/channels
(or something) but failed to find the right abstraction so far, so probably
it is best to separate
Very impressive work!
I was thinking of letting components not only implement the Lifecycle
protocol but also a protocol that defines the functionality of the
component. To give a simple example, there could be a jdbc component that
establishes a connection on init etc., and which also
(follow up)
I just realized that another approach would be to hold the jdbc connection
type implementing the JDBCProtocol in system under [:jdbc-component :db] or
something, and then call the clojure.java.jdbc/query like functions on
that. Anyway, I would be very happy to hear your comments on
On Sat, Nov 2, 2013 at 11:05 PM, Timothy Washington twash...@gmail.com wrote:
C) Now, I run my environment in a Virtual Machine. So when using the browser
to try and go to each of the url end points, I got an HTTP 404, Not Found
error for all of these URLs. Ie, Compojure and Pedestal were
Umm I can't think of parallel dependency tree walking algos, off the top of
my head. Sorry :/
But niiice. Yeah, we're definitely thinking along the same lines. But
you're way ahead of me. Now just to be able to isolate that browser repl on
a per project basis.
Sweet
Tim Washington
If you are just visiting every node as a tree, and you have core.async,
then there's
(let [c (chan)]
(go
(doseq [n (tree-seq ... (depends on tree implementation) ...)]
(! c n)))
(dotimes [_ (.availableProcessors (Runtime/getRuntime))]
(go
(loop []
(when-let [n (!
This is a good question, but not so much one for Jig as for Stuart's
workflow pattern on which Jig's based.
Generally, I write my Clojure bottom-up, so that functions that do work
against database connections and the like, take these as parameters, and
not the whole system map. This leads to
Ah, for that you need to layer your DAG (directed acyclic graph -- if A
and B both depend on C, and are dependencies of D, you don't have a tree).
Start with S an empty set and n = 0. Iteratively let Sn be the items with
no dependencies not in S, S become S U Sn, and n = n + 1 until no items are
Too right.
Yes, wrt the multi-project / classpath thing, running isolated test for a
particular project is only one aspect. I also have an eye to running a i)
browser-connected repl and ii) debugger for a particular project. So those
things, along with iii) running tests, make very high, the
Hi Tim,
It's interesting you're thinking about browser-connected repls. Today I
added clojurescript support to Jig, it's pushed to master but I haven't
documented the config options yet, but below is an example. Nothing fancy
like crossovers yet, it's basically a thin wrapper over
+1
On Friday, October 18, 2013 7:30:20 AM UTC+8, zcaudate wrote:
Would it be possible to put up a video of a typical workflow example with
pedestal. It's quite difficult for me to piece everything together just by
reading the documentation.
Chris
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Another question, using jig, the connection/db/cache/storage will be
everywhere in our code as a parameter of functions, is it flexible?
,currently I prefer to managing those side effect at one place but will not
spread out to our other core functions.
Thanks
On Saturday, October 12, 2013
Hi Tim,
Thanks for the great feedback, it's really useful.
I've tried to keep the config so that it works out-of-the-box for examples,
but is possible to point at other configurations without mutating the Jig
repo itself. But I see there's more refinements needed.
If you look in
Hi Tim,
The tests in JUXT accounting are using clojure.core.test. I'm fairly sure
Midje's :autotest feature does something dynamic to determine the tests to
run and that may not work with Jig's classloading approach. For example, if
something uses (System/getProperty java.class.path) it will
Ok, some more feedback for Jig.
*A)* Testing - Let's say I have a multi-project jig, with dependencies
across projects. There doesn't seem to be a way to run tests (midje
:autotest) for a specific project. I tried creating a Midje component (see
https://www.refheap.com/20442). But when I *i)* put
Hey Malcolm,
*A)* Ok, so just playing around with jig some more. I'm looking to get
working *Compojure* and *Pedestal* examples.
*B)* I started with a raw `*git clone g...@github.com:juxt/jig.git*`. Then
in that directory, I ran the commands in blue.
*C)* Now, I run my environment in a Virtual
Ok, I actually got the compojure example working. I just had to remove the
*config/console.edn* and *config/default.edn* files in my jig. They must be
disrupting the config that I put in. So that's my only feedback so far.
Ok, this is looking really good. Great work :)
Tim Washington
Thanks Malcom,
Even something really simple like showing your current project setup would be
really good for me to get going.
On 21/10/2013, at 15:57, Malcolm Sparks malc...@juxt.pro wrote:
Hi Chris, yes I will try to do something like that very soon.
On Friday, October 18, 2013 12:30:20
Hi Tim,
I've just pushed Jig 1.2.0 to https://github.com/juxt/jig.
This release adds support for Ring and Compojure, which many people have
asked for, including proper examples of using both Ring/Compojure and
Pedestal services. There are numerous other components included (Git pull,
JMX,
Hi Tim,
Good to hear you're finding Jig useful.
There isn't any explicit support for Ring in Jig yet, it's just Pedestal
services right now. The separation of jig.web.server and jig.web.app into 2
components is to allow multiple 'virtual hosts' to share the same Jetty
server, if necessary.
Hi Chris, yes I will try to do something like that very soon.
On Friday, October 18, 2013 12:30:20 AM UTC+1, zcaudate wrote:
Would it be possible to put up a video of a typical workflow example with
pedestal. It's quite difficult for me to piece everything together just by
reading the
Hey Malcolm,
So since you guys just have Pedestal set up at the moment, I've started
there.
*My Repos *
You can see my project jig
herehttps://github.com/stefonweblog/stefon-jig/blob/master/config/config.clj.
It connects to
Also, is there a Google Group for Jig? I'm playing around with it, can see
the potential, and already have some questions. Anyways, in the meantime,
I'll keep digging. I'm finding jig really useful so far.
*A)* As taken from the example, I'm using the Jetty :server
Would it be possible to put up a video of a typical workflow example with
pedestal. It's quite difficult for me to piece everything together just by
reading the documentation.
Chris
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Hi Tim,
Thanks for the feedback.
A. By default, nrepl-jack-in will invoke lein from the directory of the
project that owns the file in the current Emacs buffer. You need to start
Jig from its own project directory, not the project directory of your own
application. Normally I load up Jig's
On Sunday, 13 October 2013 01:21:40 UTC+1, Manuel Paccagnella wrote:
Looks very interesting, thanks for sharing! BTW, documentation is
impressive and quite comprehensive.
On a related note: I've spotted a couple of typos in your README.md so
far. Do you accept pull requests for small
This looks really cool. A few things.
*A)* Looks like I have to run nrepl in the jig project directory. I'm
finding that emacs also has to be started in the same jig directory. Then
all of my code editing has to be referenced from that directory (ie: *C-x
C-f ../my-project/my-file.clj*). If I
Looks very interesting, thanks for sharing! BTW, documentation is
impressive and quite comprehensive.
On a related note: I've spotted a couple of typos in your README.md so far.
Do you accept pull requests for small fixes like these?
Il giorno venerdì 11 ottobre 2013 18:23:41 UTC+2, Malcolm
A few months ago, Stuart Sierra blogged about the workflow he follows for
building Clojure applications.
One of the great pleasures of working with a dynamic language is being
able to build a system while simultaneously interacting with it.
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