[Freeswitch-users] Spidermonkey ODBC
Jonas Gauffin
jonas.gauffin at gmail.com
Wed Feb 20 11:23:01 EST 2008
ohh. yes ofcourse. didnt think of that.
How about adding driver mapping into the odbcfile.
for example:
<section name="odbc">
<connection_check driver="default">SELECT 1</connection_check>
<connection_check driver="fb64">SELECT FIRST 1 * FROM
RDB$RELATIONS</connection_check>
<connection_check driver="firebird">SELECT FIRST 1 * FROM
RDB$RELATIONS</connection_check>
</section>
On Wed, Feb 20, 2008 at 4:54 PM, Michael Jerris <mike at jerris.com> wrote:
> This check would have to be specific to each odbc connection, not global
> to the switch, as you could be using different types of databases for
> different connections. I still lean towards a better way of auto-detecting
> (probably in addition to a configurable option) if it is at all possible.
>
> Mike
>
> On Feb 20, 2008, at 9:57 AM, Jonas Gauffin wrote:
>
> Ok. I've done a patch and will upload it if the following config is ok by
> Anthony.
>
> (Either create odbc.conf.xml in autoload_configs or add it directly to
> freeswitch.xml)
>
> <section name="odbc" description="odbc general options">
> <connection_check>SELECT 1</connection_check>
> </section>
>
> My patch will load that string when a new connection is created.
>
> On Wed, Feb 20, 2008 at 3:40 PM, <freeswitch at dalethatcher.com> wrote:
>
> > Could I suggest the 'db check' query be configurable? Oracle is another
> > database which doesn't work with the 'select 1' and needs 'select 1 from
> > dual'. Then you can have the default as 'select 1' and let the end user
> > fiddle with the config for their own particular broken DB.
> >
> > Adding in special code to handle every database out there is going to be
> > a big headache for you. If it isn't already.
> >
> > thanks,
> >
> > - Dale
> >
> > On Wed, Feb 20, 2008 at 06:08:08AM -0800, Anthony Minessale wrote:
> > > Many databases break silently or the connection drops
> > > without any way to know for sure w/o trying to use it.
> > >
> > > I choose to ensure in the core that the data is connected.
> > > executing "select 1" is a small price to pay to make sure
> > > that the database is connected considering the importance
> > > of persistent connectivity in the sip, jingle and call
> > > limit databases as well as the javascript that rely on it.
> > >
> > > All of those applications to make the safe
> > > assumption that the core will keep the db connected and
> > > to change that would be drastic behavior change and
> > > destabilize the code on the eve of our release.
> > >
> > > Therefore i guess we should focus on better heuristics
> > > to detect firebird, preferably based on the driver name
> > > and not by doing a 2nd sql stmt every time.
> > >
> > >
> > >
> > > Anthony Minessale II
> > >
> > > FreeSWITCH http://www.freeswitch.org/
> > > ClueCon http://www.cluecon.com/
> > >
> > > AIM: anthm
> > > MSN:anthony_minessale at hotmail.com
> > > GTALK/JABBER/PAYPAL:anthony.minessale at gmail.com
> > > IRC: irc.freenode.net #freeswitch
> > >
> > > FreeSWITCH Developer Conference
> > > sip:888 at conference.freeswitch.org
> > > iax:guest at conference.freeswitch.org/888
> > > googletalk:conf+888 at conference.freeswitch.org
> > > pstn:213-799-1400
> > >
> > >
> > > ----- Original Message ----
> > > From: David Revill <davidrevill at datarun.co.uk>
> > > To: freeswitch-users at lists.freeswitch.org
> > > Sent: Tuesday, February 19, 2008 4:37:28 PM
> > > Subject: Re: [Freeswitch-users] Spidermonkey ODBC
> > >
> > >
> > >
> > >
> > >
> > > DIV {
> > > MARGIN:0px;}
> > >
> > >
> > >
> > >
> > > Unfortunately, there isn't a universal ansi sql
> > > stmt that will do it as the only statements which can be guaranteed to
> > follow
> > > the ansi standard are the simple select, update and delete statements
> > which rely
> > > on knowing some table name .
> > >
> > >
> > >
> > >
> > > I think we are trying to solve a problem which need
> > > not exist. The Javascript application should handle the idle timeout.
> > It
> > > should close the connection if it will not be using it for a while,
> > > and,if it needs to, can do what db_is_up is attempting to do in the
> > > application code. Testing for connection before every query seems an
> > > unneccessary overhead.
> > >
> > >
> > >
> > >
> > > ----- Original Message -----
> > >
> > > From:
> > > Anthony
> > > Minessale
> > >
> > > To: freeswitch-users at lists.freeswitch.org
> > >
> > >
> > > Sent: Tuesday, February 19, 2008 6:38
> > > PM
> > >
> > > Subject: Re: [Freeswitch-users]
> > > Spidermonkey ODBC
> > >
> > >
> > >
> > >
> > > is
> > > there some universal ansi sql stmt that is small and harmless
> > > but is
> > > supported by everything? to replace "select 1"
> > >
> > >
> > >
> > >
> > >
> > > Anthony Minessale II
> > >
> > > FreeSWITCH http://www.freeswitch.org/
> > > ClueCon http://www.cluecon.com/
> > >
> > > AIM:
> > > anthm
> > > MSN:anthony_minessale at hotmail.com
> > > GTALK/JABBER/PAYPAL:anthony.minessale at gmail.com
> > > IRC:
> > > irc.freenode.net #freeswitch
> > >
> > >
> > > FreeSWITCH Developer
> > > Conference
> > > sip:888 at conference.freeswitch.org
> > > iax:guest at conference.freeswitch.org/888
> > > googletalk:conf+888 at conference.freeswitch.org
> > > pstn:213-799-1400
> > >
> > >
> > >
> > >
> > > -----
> > > Original Message ----
> > > From: David Revill
> > > <davidrevill at datarun.co.uk>
> > > To:
> > > freeswitch-users at lists.freeswitch.org
> > > Sent: Tuesday, February 19, 2008
> > > 6:56:31 AM
> > > Subject: Re: [Freeswitch-users] Spidermonkey ODBC
> > >
> > >
> > >
> > >
> > > One way to detect firebird would be to put the
> > > 'Select first 1 * from RDB$relations' into
> > switch_odbc_handle_connect.
> > > If it succeeds then it is Firebird. A better query might be 'select
> > * from
> > > rdb$database' as the system table rdb$database only ever has 1
> > > record.
> > >
> > >
> > > -----
> > > Original Message -----
> > >
> > > From:
> > > Jonas
> > > Gauffin
> > >
> > > To:
> > > freeswitch-users at lists.freeswitch.org
> > >
> > >
> > > Sent:
> > > Tuesday, February 19, 2008 12:18 PM
> > >
> > > Subject:
> > > Re: [Freeswitch-users] Spidermonkey ODBC
> > >
> > >
> > >
> > > I''ve only tested it with firebird on windows. As you said,
> > > your driver name doesnt match any of the names I used to detect if
> > it's
> > > firebird.
> > >
> > > The problem is that most databases supports "SELECT 1" as a
> > > query. It will always be successful if the the connection is up.
> > However,
> > > firebird did not support "SELECT 1" and therefore i did query the
> > system
> > > database instead.
> > >
> > > If the firebird check fails, it will try to invoke
> > > "SELECT 1", and on firebird that query will fail. And the failure
> > is
> > > interpreted as the connection is down, and therefore it tries to
> > > reconnect.
> > >
> > > That's probably why you get that error. If you have any
> > > other idea on how I can detect if it's a firebird db, please let
> > me know and
> > > i'll fix the odbc code.
> > >
> > >
> > > On Feb 19, 2008 1:05 PM, David Revill <davidrevill at datarun.co.uk>
> > > wrote:
> > >
> > >
> > >
> > > That's a fair point, but db_is_up is only
> > > called in 2 places and the attempted re-connect could be done if
> > the
> > > exec'd query fails. That way it would not be dependant on the
> > name of the
> > > driver.
> > >
> > >
> > >
> > > In my application, the database was queried
> > > at the beginning of the script and the connection closed. It was
> > > explicitly re-connected at the end to post data, so the
> > connection timeout
> > > was not an issue.
> > >
> > >
> > >
> > > -----
> > > Original Message -----
> > >
> > > From:
> > > Jonas Gauffin
> > >
> > > To:
> > > freeswitch-users at lists.freeswitch.org
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > > Sent:
> > > Tuesday, February 19, 2008 10:35 AM
> > >
> > > Subject:
> > > Re: [Freeswitch-users] Spidermonkey ODBC
> > >
> > >
> > >
> > > I did that code a couple of months ago.
> > > The function
> > > was added since connections are closed if they are idle too
> > long, and
> > > they were not reconnected again if that happened.
> > >
> > >
> > >
> > > On Feb 19, 2008 11:22 AM, David Revill <
> > davidrevill at datarun.co.uk>
> > > wrote:
> > >
> > >
> > >
> > > The problem is in switch_odbc.c function
> > > db_is_up. It assumes that the variable is_firebird is true,
> > but the
> > > setting of this variable assumes that the Firebird driver
> > name has
> > > 'FIREBIRD', 'FB64' or 'FB32' in it.
> > >
> > >
> > >
> > > I commented out the code in
> > > db_is_up and just returned a true value, as on closer
> > inspection
> > > could not see the point of this function.
> > >
> > >
> > >
> > > David Revill
> > >
> > >
> > >
> > > -----
> > > Original Message -----
> > >
> > > From:
> > > David Revill
> > >
> > > To:
> > > freeswitch-users at lists.freeswitch.org
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > > Sent:
> > > Tuesday, February 19, 2008 8:58 AM
> > >
> > > Subject:
> > > Re: [Freeswitch-users] Spidermonkey ODBC
> > >
> > >
> > >
> > >
> > > I spotted this error a few months ago,
> > > and to my shame did not let everyone know. I have since
> > > archived the project so cannot point you to the actual
> > code.
> > > However, the problem is that it assumes the name of the
> > > Firebird Driver (FB64?) to set a boolean, so that it
> > handle
> > > the connection test differently.
> > >
> > >
> > >
> > > When looking at the actual code, I
> > > actually felt that the connection test was redundant, as
> > all it did
> > > was a select from a system table. This meant it was doing
> > two
> > > queries for everyone required. (One to see if it could do
> > a query,
> > > and then one to do it). I therefore commented the
> > connection test
> > > function out.
> > >
> > >
> > >
> > > regards
> > >
> > >
> > >
> > > David Revill
> > >
> > >
> > > -----
> > > Original Message -----
> > >
> > > From:
> > > Steven Brown
> > >
> > > To:
> > > freeswitch-users at lists.freeswitch.org
> > >
> > >
> > > Sent:
> > > Monday, February 18, 2008 11:34 PM
> > >
> > > Subject:
> > > [Freeswitch-users] Spidermonkey ODBC
> > >
> > >
> > >
> > >
> > > Hi,
> > >
> > >
> > >
> > > I'm experimenting with
> > > spidermonkey for JavaScript call control, the basics
> > seem
> > > fine and I'm now trying to connect to an existing
> > Firebird
> > > database, the Firebird odbc lib is installed ok as is
> > unixODBC and
> > > I can confirm this and access the db no problem with
> > isql,
> > > something strange happens though when I connect in
> > spidermonkey,
> > > basically the odbc connection is made successfully, but
> > then as
> > > soon as I call either exec or query the odbc connection
> > starts to
> > > drop and re-connect continuously,
> > >
> > >
> > >
> > > the isql output is below
> > >
> > >
> > >
> > >
> > > isql -v
> > > test
> > > +---------------------------------------+
> > > |
> > > Connected!
> > > |
> > > |
> > > |
> > > |
> > > sql-statement
> > > |
> > > | help
> > > [tablename]
> > > |
> > > |
> > > quit
> > > |
> > > |
> > > |
> > > +---------------------------------------+
> > > SQL> select
> > > first 1 * from
> > > pool_phones
> > > +---------------------+------------+
> > > |
> > > GSMNO
> > > | ORGNO
> > > |
> > > +---------------------+------------+
> > > |
> > > 0712345678 |
> > > 1
> > > |
> > > +---------------------+------------+
> > > SQLRowCount returns
> > > 1
> > > 1 rows fetched
> > > SQL>
> > >
> > >
> > > however the following test code
> > > calling the same query
> > >
> > >
> > >
> > > use("ODBC");
> > >
> > > var db = new
> > > ODBC("test","SYSDBA","masterkey");
> > > db.connect();
> > > db.query("select
> > > first 1 * from pool_phones");
> > >
> > > db.nextRow();
> > >
> > > row =
> > > db.getData();
> > > console_log("INFO","HELLO " + row["GSMNO"]
> > > + "\n");
> > >
> > > exit();
> > >
> > >
> > >
> > > gives the following output and then
> > > just loops disconnecting and reconnecting until I
> > shutdown
> > > freeswitch
> > >
> > >
> > > 2008-02-18 23:26:03 [DEBUG]
> > > switch_core_state_machine.c:144
> > switch_core_standard_on_execute()
> > > sofia/default/1000 at 192.168.0.7:5060 Execute
> > > javascript(/usr/scripts/test1.js)
> > > 2008-02-18 23:26:03 [DEBUG]
> > > mod_spidermonkey.c:3150 js_api_use() Loading ODBC
> > > 2008-02-18
> > > 23:26:03 [DEBUG] switch_odbc.c:145
> > switch_odbc_handle_connect()
> > > Connecting test
> > > 2008-02-18 23:26:03 [DEBUG] switch_odbc.c:174
> > > switch_odbc_handle_connect() Connected to [test]
> > > 2008-02-18
> > > 23:26:03 [DEBUG] switch_odbc.c:95
> > switch_odbc_handle_disconnect()
> > > Disconnected 0 from [test]
> > > 2008-02-18 23:26:03 [DEBUG]
> > > switch_odbc.c:142 switch_odbc_handle_connect()
> > Re-connecting
> > > test
> > > 2008-02-18 23:26:03 [DEBUG] switch_odbc.c:145
> > > switch_odbc_handle_connect() Connecting test
> > > 2008-02-18
> > > 23:26:03 [DEBUG] switch_odbc.c:174
> > switch_odbc_handle_connect()
> > > Connected to [test]
> > > 2008-02-18 23:26:03 [CRIT]
> > > switch_odbc.c:234 db_is_up() The sql server is not
> > responding for
> > > DSN test []
> > > 2008-02-18 23:26:03 [INFO] switch_odbc.c:239
> > > db_is_up() The connection has been re-established
> > >
> > > ...
> > >
> > > Any ideas much appreciated
> > >
> > > Thanks
> > >
> > > Steve
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
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