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| ea6611 |
 Posted: Fri Apr 30, 2010 9:25 am |
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User
Joined: 30 Apr 2010
Posts: 5006
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Hi,
I'm working with transforming an existing pure-erlang application into an OTP based application, and I nedd some help with the database.
As I know Mnesia is itself an OTP app so I assume I dont have to create a supervisor for it. So what is the most suitable way to integrate Mnesia in the OTP app.
Thanks,
ely |
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| Michal Ptaszek |
| Posted: Fri Apr 30, 2010 10:56 am |
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User
Joined: 01 May 2008
Posts: 35
Location: Krakow
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If your application has Mnesia in its dependency list, put it in the applications section in your .app file:
Code:
(...)
{applications, [kernel, stdlib, mnesia]},
(...)
Moreover, remember to put put Mnesia in .rel file as well:
Code:
{release, {RelName, Vsn}, {erts, EVsn}, [
(...)
{mnesia, "MnesiaVsn"},
(...)
]}.
For more help on how to build your system obeying OTP rules, look at http://www.erlang.org/doc/design_principles/des_princ.html (and referenced modules, like applications and releases). |
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| ea6611 |
| Posted: Fri Apr 30, 2010 11:13 am |
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Joined: 30 Apr 2010
Posts: 5006
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Thank you Michal.
And I assume it is the same procedure with Inets. |
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| Michal Ptaszek |
| Posted: Fri Apr 30, 2010 11:53 am |
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User
Joined: 01 May 2008
Posts: 35
Location: Krakow
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Yes, this procedure should be performed for every application in your release.
However, remember to avoid using some commands in the code (such as application:start(AppName) or application:set_env(AppName, Key, Val)) since the applications will be automatically started and configured by Erlang's internal processes (according to your .rel, .app (+ .boot which will be generated basing on those two) and sys.config files). |
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| wuji |
| Posted: Mon Aug 27, 2012 7:23 am |
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