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| 12:21.29 | *** topic/#asterisk-dev is Asterisk Development Discussion -=- http://www.asterisk.org/developers -=- Tier 2 and 3.14159265 support is in #asterisk -=- Hell hath frozen over: Asterisk is moving to Git -=- Follow on Twitter at @AsteriskDev |
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| 15:34.49 | Stefan26 | the status of ASTERISK-24925 seems to be that you to want to wait and see if crashes can still happen on 13.5 and pjprojects2.4. I'm just curious if any of you attempted looking into that issue based on current crashdumps? I couldn't debug that issue myself unfortunately, it happens way too seldom to make empirical tests |
| 15:35.57 | Stefan26 | also i need to educate myself in UNIX/network/C programming, any books you can recommend? |
| 15:36.12 | mjordan | No one is actively working on the issue, and it is in fact still in Triage - so I don't think anyone knows for sure how to reliably reproduce it. |
| 15:36.32 | mjordan | Stefan26: Those are somewhat disparate topics; the only one I could recommend something on is C |
| 15:36.45 | Stefan26 | did Dade Brandon's comments make sense to you? |
| 15:37.08 | mjordan | They make sense, but that doesn't mean I understand the cause |
| 15:37.28 | file | Dade Brandon is stable now afaik |
| 15:37.42 | mjordan | In which case it was symptoms from ASTERISK-25103 |
| 15:37.56 | mjordan | Stefan26: you really can't go wrong with K&R's C book |
| 15:38.08 | Stefan26 | our systems hasnt crashed in 2 months either but we have half the users now |
| 15:38.14 | Stefan26 | haven't |
| 15:38.19 | mjordan | Stefan26: That will at least give you a stable foundation on the language. Asterisk is a bit different than that. |
| 15:39.39 | mjordan | That is, while Asterisk is written in C, so much of writing code in Asterisk is understanding its APIs and frameworks that being proficient in writing code for it just takes time and learning its codebase |
| 15:44.47 | Stefan26 | is there any recommended reading material in learning asterisk's architecture or APIs? Up til now I have only read a few guides (e.g. how to build your own module) and http://www.aosabook.org/en/asterisk.html |
| 15:46.12 | mjordan | huh |
| 15:46.24 | mjordan | so, Russell's chapter is still somewhat accurate. |
| 15:46.35 | mjordan | But there isn't a comprehensive guide to the APIs |
| 15:46.58 | mjordan | there are a few modules that can act as a good reference; it somewhat depends on what you want to do |
| 15:47.17 | mjordan | I don't think anyone who works on Asterisk is an expert in all of it :-) |
| 15:48.19 | mjordan | really thought there was a doxygen page for astobj2 |
| 15:49.26 | mjordan | There it is |
| 15:49.38 | mjordan | So, the doxygen pages generated are the best guides for the APIs. They're usually accurate :-) |
| 15:49.47 | mjordan | http://doxygen.asterisk.org/trunk |
| 15:50.03 | mjordan | suspects these are still getting generated out of SVN |
| 15:51.51 | Stefan26 | I don't know how to attack a huge system effectively... They say every complex system has evolved from a simple (or simpler) system. i wish I could attack a much simpler (asterisk-similar) system first, as practice. |
| 15:52.56 | mjordan | Stefan26: Is there something in Asterisk that you're interested in? |
| 15:53.17 | mjordan | It's usually best to have a "I wish it did this" in mind, then look at that, as opposed to trying to take in the entire thing |
| 15:56.04 | mjordan | so... here's something that would be nice. |
| 15:56.12 | mjordan | we have a statsd module. That's cool. |
| 15:56.24 | mjordan | and it is written as a 'demo' of what statsd can do. |
| 15:56.44 | mjordan | i.e., res_statsd |
| 15:56.56 | mjordan | it exposes an API in statsd.h |
| 15:57.10 | mjordan | it would be nice if this were exposed in the dialplan |
| 15:57.26 | mjordan | that is, we had an Application module that could send arbitrary statistics to a statsd server |
| 15:57.46 | mjordan | that way, a dialplan can generate application specific statistics. "You have 9 calls in conferences, 10 calls in queues, and 23 active agents" |
| 15:58.33 | mjordan | generally, the dialplan application would just have to take in a metric name, type, and some value |
| 15:59.22 | mjordan | it'd be a pretty easy module to write, but would require writing a module from scratch, and it would be a nice feature |
| 15:59.36 | mjordan | (Kamailio's statsd integration works on a similar principle) |
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| 16:12.58 | Stefan26 | Yeah mjordan, whenever i have looked at asterisk-code in the past ive had small specific goals... usually very small things like changing timers or behavior of a call or dialplan app or tracing a bug, but I never had confidence in doing it, since im lost in the architecture. I don't have a specific interest right now, so i thought i'd try take in the big picture |
| 16:16.51 | Stefan26 | https://wiki.asterisk.org/wiki/display/AST/Asterisk+Architecture%2C+The+Big+Picture was pretty good reading i guess, i dont want to become an expert |
| 16:18.25 | mjordan | Stefan26: I will say that when I started on Asterisk, I just picked a bug, learned that area, fixed the bug, then moved to the next, and built up from there. If you aren't interested in a particular area though, that's hard to stay motivated on. |
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| 16:54.13 | Stefan26 | i'm usually interested in whatever doesn't work perfectly out of the box, lately that's webrtc (which involves many areas like chan_sip, websockets, dtls, ice). And now that a colleague tried to write an app (which cant be used in our pbx due to issues with memory leaks and performance) to be used for processing video (adding overlay-text and stuff to the video frames), I'm interested in |
| 16:54.13 | Stefan26 | understanding app-building in general and how asterisk in general operates since i want to be able to help him in the future |
| 16:55.02 | Stefan26 | i guess i should start with http://doxygen.asterisk.org/trunk/d0/d64/app__skel_8c-source.html Is that already a fully functional compilable app? |
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| 17:25.14 | Stefan26 | also let me know if I ask too much in this channel, maybe you like to keep this channel professional and unpolluted. |
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| 17:57.47 | mjordan | Stefan26: nope, this channel exists for questions. Questions are good. |
| 17:58.02 | mjordan | Stefan26: if you don't get a response, it's probably just because it is Saturday :-) |
| 17:58.28 | mjordan | Stefan26: That's not a bad module to start from, although it's actually a bit complex. It demonstrates how to use the configuration framework, which, if you have a module needing configuration, is quite useful |
| 17:58.49 | mjordan | On the other hand, if you don't need configuration, a lot of that module is overkill |
| 18:25.53 | Stefan26 | cool, thanks, and have a nice weekend! |
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| 21:43.11 | mjordan | file: ping whenever you're around |
| 21:43.21 | file | mjordan, moo |
| 21:46.08 | file | mjordan, or MOOOOOOOOOOOOO |
| 22:04.37 | mjordan | file: sorry, had to clean the kitchen |
| 22:04.45 | mjordan | file: so, about the media caching thing |
| 22:05.07 | mjordan | when the media cache is initialized, the backends aren't registered, which means we can't query them about anything we've stored in the astdb |
| 22:05.22 | mjordan | but right now, I also can't get at the metadata that was stored by the backend on the ast_bucket_file |
| 22:05.41 | mjordan | how about an API in bucket.h that provides a callback function for an ao2_callback call on the metadata ao2_container? |
| 22:06.13 | mjordan | that way I can store the metadata in the astdb that the backend would use, and the next time someone asks for that media, the backend can determine if the file is stale or not |
| 22:09.34 | file | sounds good to me |
| 22:18.50 | mjordan | \o/ |
| 22:18.55 | mjordan | should be easy to clean that part up then |
| 22:19.03 | mjordan | goes to play some Baldur's Gate 2 |
| 22:20.11 | file | I am partaking in Youtube, after doing some sysadmin work and financial changes |
| 22:44.43 | mjordan | happy saturday |
| 22:45.00 | file | I thought it was Sunday when I woke up this morning |
| 22:45.21 | file | so I, for once, WELCOME THIS SATURDAY |
| 22:45.23 | file | er one |
| 22:45.37 | WIMPy | Too late. Sunday already. |
| 22:45.55 | mjordan | damn you international date line! |
| 22:46.35 | file | mjordan, don't you have more Baldur's Gate 2 to play? |
| 22:46.56 | mjordan | made it a bit further, but than Minsc got charmed and killed the rest of the party, so meh |
| 22:46.59 | mjordan | jackwagon. |
| 22:47.31 | file | it's a party up in here |
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