| Time |
S |
Nick |
Message |
| 00:03 |
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AndroidLoverInSF joined ##javaee |
| 00:09 |
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Jhosepth |
Bueno, gracias de todas formas. |
| 00:13 |
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| 03:00 |
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| 03:06 |
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cem_ |
how to update specific component in field instead of @form |
| 03:07 |
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cem_ |
or panel |
| 03:07 |
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cem_ |
<p:ajax event="change" process="" update="panel"></p:ajax> |
| 03:11 |
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cem_ |
pdurbin: |
| 03:11 |
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cem_ |
anyone jsf |
| 03:12 |
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cem_ |
primefaces |
| 03:18 |
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cem_ |
there is no customization in jsf |
| 03:21 |
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cem_ |
how to update specific component in field instead of @form |
| 03:46 |
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sajjadg |
jaxb is generating output like this: {"@index":2,"@text":"foo"} and I have problem using @ with in angularjs |
| 03:46 |
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sajjadg |
is there a way to remove them? |
| 04:49 |
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| 11:45 |
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| 11:48 |
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fabioportieri |
guys i need help with ibatis over collections in in clause: http://pastebin.com/mte2n9rp |
| 12:10 |
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fabioportieri |
i guess i can't do it with one query only |
| 12:19 |
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| 12:23 |
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pdurbin |
fabioportieri: you're using this? http://en.wikipedia.org/wiki/IBATIS |
| 12:23 |
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fabioportieri |
pdurbin: yes |
| 12:24 |
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pdurbin |
why? ;) |
| 12:24 |
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fabioportieri |
the client uses it.. so i have to too |
| 12:25 |
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pdurbin |
is there a forum for it? a mailing list? |
| 12:25 |
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fabioportieri |
yes probably |
| 12:25 |
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fabioportieri |
tough the modern version is called mybatis |
| 12:26 |
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pdurbin |
yeah, that's what I gathered from http://ibatis.apache.org |
| 12:26 |
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fabioportieri |
but i'm thinking i can't do that, if iwant to use that construct i need to pass a collection/array/etc in the parameterClass |
| 12:28 |
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fabioportieri |
so, i should refactor the query and put it as a subquery to another select that accepts the collection as parameterclass |
| 12:29 |
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fabioportieri |
or,easier, move the in logic in the java code |
| 12:30 |
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sajjadg |
pdurbin: ...[why?] nice ;) |
| 12:37 |
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pdurbin |
sajjadg: maybe it's awesome. I don't know :) |
| 12:39 |
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sajjadg |
pdurbin: I liked how you said why. it was so nice and honest :-) I am very sensetive about choosing between available options. iBatis is not the best choice in most cases ;) but as they say: "no one gets fired for using apache softwares" ;) |
| 12:41 |
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pdurbin |
:) |
| 12:43 |
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fabioportieri |
i don't think mybatis is too bad |
| 12:47 |
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fabioportieri |
people revert from orm to plain sql aniway :p |
| 12:50 |
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sajjadg |
I relized that more than arguing about techs I should do some work. I used to spends lots of times comparing and benchmarking without doing anything good like a journalist! |
| 12:52 |
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sajjadg |
pdurbin: how are you? how are your angles? :-) |
| 13:46 |
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fabioportieri |
fuck me |
| 14:22 |
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acuzio |
no thanks |
| 14:25 |
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| 14:34 |
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* fabioportieri |
points a nipple to acuzio direction |
| 14:35 |
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| 14:38 |
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pdurbin |
sajjadg: my angularjs? |
| 14:41 |
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| 14:56 |
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sajjadg |
pdurbin: :-) no. I meant your daughters (angels) sorry typo |
| 14:59 |
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pdurbin |
sajjadg: oh, oh. stopped by the school this morning to register the little one for kindergarten |
| 15:15 |
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| 15:53 |
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sajjadg |
pdurbin: I taught you said they both to school! how fortunate/happy you are to have two little girl. I wish I could marry sooner and have children. God bless them. :-) |
| 16:03 |
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pdurbin |
thanks :) |
| 16:05 |
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| 19:21 |
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Voyage joined ##javaee |
| 19:21 |
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Voyage |
hello |
| 19:22 |
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Voyage |
Is this channel live? |
| 19:24 |
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whartung |
more lively some times than others |
| 19:25 |
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Voyage |
Question: if I only need 1 connection with many threads accesing it. I dont need a pool but I do need a datasourse management? |
| 19:25 |
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sfisque |
no, we're all dead here |
| 19:25 |
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sfisque |
depends. are you the client or the server? |
| 19:25 |
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Voyage |
JDBC, posgtres |
| 19:25 |
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Voyage |
s/posgtres/postgres |
| 19:26 |
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sfisque |
you want a pool |
| 19:26 |
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Voyage |
for one con? |
| 19:26 |
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sfisque |
what type of app is using this connection? |
| 19:26 |
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Voyage |
normal app |
| 19:26 |
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Voyage |
nothing special |
| 19:26 |
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Voyage |
5 threads |
| 19:26 |
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Voyage |
one connection |
| 19:27 |
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Voyage |
just dont want each thread/ query to create new connections each time |
| 19:27 |
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Voyage |
need to keep 1 connection open all the time |
| 19:27 |
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sfisque |
oh. yah then one conn be fine i guess |
| 19:27 |
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Voyage |
theres a catch |
| 19:28 |
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Voyage |
ojacobson> Thing is, even if Connection, ResultSet, Statement, and so on are all internally thread-safe -- that is, if concurrent calls from multiple threads never corrupts its data structures or causes it to emit broken messages to the underlying dbms -- you still can't use one connection to run two queries at the same time . ojacobson> use a DataSource (which is usefully thread safe, being a factory for connections) instead, and have each task obtain it |
| 19:28 |
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Voyage |
s own connection from the datasource |
| 19:29 |
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Voyage |
so what do I need to make many threads share 1 connection object? |
| 19:30 |
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sfisque |
i guess the question is, what is the point of multi-threading if you only have one connection. you're still syncronizing all the work because you can only perform one operation at a time against the db |
| 19:31 |
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sfisque |
either go full MT with a conn per thread, or get rid of the threads and just use the one connection sequentially |
| 19:33 |
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sfisque |
or use a worker thread and build a queue of "operations" that callback when they are completed. then you're threads can just "submit work" and "respond when their work nugget completes" |
| 19:33 |
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Bombe |
Voyage, which part of “you can not process multiple requests at the same time with a single connection” have you not understood in the last two hours? |
| 19:33 |
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pdurbin |
last two hours? |
| 19:34 |
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Bombe |
Yes, he’s been in ##java with the same issue, too. |
| 19:34 |
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Bombe |
Which is where ojacobson’s quote from above is from. |
| 19:34 |
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pdurbin |
oh |
| 19:37 |
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Voyage |
Bombe, is correct |
| 19:38 |
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Voyage |
Bombe, so you mean , in short and in optimistic way, that the number of threads should be equal to the number of connections? |
| 19:39 |
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Bombe |
Voyage, that has about nothing to do with one another. Use a connection pool, get a connection from it whenever you need something from the database, problem solved. |
| 19:40 |
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Voyage |
Bombe, that is understood but the question remains |
| 19:40 |
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Voyage |
Bombe, as “you can not process multiple requests at the same time with a single connection” , then there must be threads == no. of cons |
| 19:41 |
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Voyage |
Bombe, if I have 10 threads, but 5 connections. only 5 threads can issue requests at a single time. correct ? |
| 19:42 |
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* Voyage |
provides that the concept / app to be discussed here is totally dbmc and thread dependant |
| 19:44 |
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Bombe |
Obviously. |
| 19:44 |
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Voyage |
:) |
| 19:45 |
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Bombe |
The connection pool can however block until a connection is free. |
| 19:45 |
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Bombe |
So, again, use a connection pool, problem solved. |
| 19:46 |
|
Voyage |
my concluded optimization == #threads == #connections == #of cpu cores |
| 19:49 |
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Voyage |
Second question: If I just use the same Connection for each thread at a same time, there will be an automatic queue of requests behind the current request processed by the connection object for some thread? |
| 19:50 |
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Voyage |
that one is only for understanding and not practical motives^ |
| 19:51 |
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Voyage |
sfisque, ? |
| 20:01 |
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sfisque |
no, you'd have to build that queue yourself. |
| 20:01 |
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sfisque |
but there's no need for a queue if every thread has it's own connection (whether pooled or not) |
| 20:02 |
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sfisque |
since each thread is "internally synchronous", every operation is atomic and synchronized within the context of the thread |
| 20:44 |
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| 20:51 |
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Voyage |
sfisque, hm |
| 20:52 |
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Voyage |
using 1 con for all threads. just for sake of understanding (I know iam not doing the right way but for learning) http://pastebin.ca/2638731 |
| 20:53 |
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Voyage |
whats the exception about? |
| 20:55 |
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Voyage |
private static Connection connection = getConnection(); was done |
| 20:55 |
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Voyage |
at start |
| 21:09 |
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| 22:29 |
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Voyage |
looks like my app is runing but dont go more than 2 cons http://pastie.org/8723891 logs at bottom |
| 23:13 |
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