BTW, I am a native speaker/writer even though the last post
may not suggest that ( and I am not currently drunk)-
I'll try to edit these better in the future :)
Thanks!
->-----Original Message-----
->From: Mike Marchywka
->Sent: Thursday, September 20, 2001 11:05 AM
->To: [EMAIL PROTECTED]
->Subject: Re: FW: Inconsistent behaviour in Servlet output
->
->
->I'm fairly new myself and I've never done database stuff ( I do
->applet and servlet stuff for testing compression systems).
->I thought this was kind of interesting and the question was
->simple enough I could get something out of it.
->( I'm just guess on the database stuff but I sounds like you have
->some other problem)
->->
->-> con = DriverManager.getConnection(connectionURL);
->->Beware also of static hidden in your calls. Apparently, this
->->is synchronized but it is also a static method.
->->
->The point here is that you may have static methods you don't know
->about. Constructors are statics ( there is no "this" pointer passed
->To them). I don't know if the newInstance() is supposed needed to call
->the class loader and
->initialize something or what. Did you take it out all
->together, restart
->your
->serlvet container and try that?
->
->
->
->->-----Original Message-----
->->From: Graham, Billy [mailto:[EMAIL PROTECTED]]
->->Sent: Thursday, September 20, 2001 10:42 AM
->->To: [EMAIL PROTECTED]
->->Subject: Re: FW: Inconsistent behaviour in Servlet output
->->
->->
->->Hi Mike,
->->
->->To answer your first question "What does this do?" - I'm
->->relatively new to
->->java and database programming, as is pretty obvious, so (as
->->most people do)
->->I found a 'good' example to start from (see link below). I'm
->->afraid I can't
->->answer your question as to what it does, except that I hoped
->->it was doing
->->the 'right thing' as it comes from a university Computing site!
->->
->->http://ijsr209.infj.ulst.ac.uk/tutorial/listinginf.html
->->
->->After your e-mail, I referenced my servlet computing book and
->->replaced the
->->line of code with "Class.forName(driverName);" in both
->->servlets (is this
->->correct??). This change works OK but the bug also remains -
->->again the only
->->thing removing the bug is putting 'Synchronized' around the
->->code block.
->->
->->Have you any other suggestions for me to try.
->->
->->Many thanks - regards, Billy.
->->
->->
->->
->->-----Original Message-----
->->From: Mike Marchywka [mailto:[EMAIL PROTECTED]]
->->Sent: 20 September 2001 11:44
->->To: [EMAIL PROTECTED]
->->Subject: Re: FW: Inconsistent behaviour in Servlet output
->->
->->
->->//connect to the database, pose the query and obtain the results
->->try
->->{ Class.forName(driverName).newInstance();
->->^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
->->What does this do? It can only do ANYTHING via side-effects.
->->Does the no-parameter constructor have side-effects?
->->How long do the side-effects remain effective?
->->
->-> con = DriverManager.getConnection(connectionURL);
->->Beware also of static hidden in your calls. Apparently, this
->->is synchronized but it is also a static method.
->->
->
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->
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