Обсуждение: persistent JDBC connections with a daemon
Hi, I have a very small Java application that connects to a remote host's DB and does a simple query. I don't want to install a big framwork like Tomcat just to do this one task, but it is pretty slow as it is running though a CGI wrapper, and the startup time of the JVM is pretty noticeable. I do know that there is a daemon tools project from the Jakarta project, and that there is also a Posix libary for Java. But I can't seem to find an example of anyone acutlay using those to make a java daemon. The whole reason I am using Java at all is because of JDBC, I tend to think that Java itself can take a flying leap, except that I just drool over JDBC, love it, love it! So if any of you have any pointers or URLs that would be great. Thanks, Eric (250) 655 - 9513 (PST Time Zone) "Inquiry is fatal to certainty." -- Will Durant
Hi,
This may not help you at all but this artical talks about
*Compiling Java with GCJ.*
Which improves performance.
http://www.linuxjournal.com/article.php?sid=4860
Eric Frazier wrote:
>Hi,
>
>I have a very small Java application that connects to a remote host's DB and
>does a simple query. I don't want to install a big framwork like Tomcat just
>to do this one task, but it is pretty slow as it is running though a CGI
>wrapper, and the startup time of the JVM is pretty noticeable.
>
>I do know that there is a daemon tools project from the Jakarta project, and
>that there is also a Posix libary for Java. But I can't seem to find an
>example of anyone acutlay using those to make a java daemon. The whole
>reason I am using Java at all is because of JDBC, I tend to think that Java
>itself can take a flying leap, except that I just drool over JDBC, love it,
>love it! So if any of you have any pointers or URLs that would be great.
>
>
>Thanks,
>
>
>Eric
>
>(250) 655 - 9513 (PST Time Zone)
>
>"Inquiry is fatal to certainty." -- Will Durant
>
>
>
>
>
>---------------------------(end of broadcast)---------------------------
>TIP 5: Have you checked our extensive FAQ?
>
>http://www.postgresql.org/users-lounge/docs/faq.html
>
>
>
Eric, Just create a class, put a main in it, and loop forever? That's all there is to it, unless I'm missing something. Dave On Sat, 2003-01-11 at 14:59, Eric Frazier wrote: > Hi, > > I have a very small Java application that connects to a remote host's DB and > does a simple query. I don't want to install a big framwork like Tomcat just > to do this one task, but it is pretty slow as it is running though a CGI > wrapper, and the startup time of the JVM is pretty noticeable. > > I do know that there is a daemon tools project from the Jakarta project, and > that there is also a Posix libary for Java. But I can't seem to find an > example of anyone acutlay using those to make a java daemon. The whole > reason I am using Java at all is because of JDBC, I tend to think that Java > itself can take a flying leap, except that I just drool over JDBC, love it, > love it! So if any of you have any pointers or URLs that would be great. > > > Thanks, > > > Eric > > (250) 655 - 9513 (PST Time Zone) > > "Inquiry is fatal to certainty." -- Will Durant > > > > > > ---------------------------(end of broadcast)--------------------------- > TIP 5: Have you checked our extensive FAQ? > > http://www.postgresql.org/users-lounge/docs/faq.html -- Dave Cramer <Dave@micro-automation.net>
Hi, Comunicating with the outside world(UNIX) is what you would be missing, that is what Posix is about. But I was finding it a little daunting. I have to be able to send to or pipe to it from shell applications, but once you run a normal app like you suggest, it gets its args[] and then how do you change them for the next query? thanks, Eric At 07:01 PM 1/11/03 -0500, Dave Cramer wrote: >Eric, > >Just create a class, put a main in it, and loop forever? > >That's all there is to it, unless I'm missing something. > >Dave >On Sat, 2003-01-11 at 14:59, Eric Frazier wrote: >> Hi, >> >> I have a very small Java application that connects to a remote host's DB and >> does a simple query. I don't want to install a big framwork like Tomcat just >> to do this one task, but it is pretty slow as it is running though a CGI >> wrapper, and the startup time of the JVM is pretty noticeable. >> >> I do know that there is a daemon tools project from the Jakarta project, and >> that there is also a Posix libary for Java. But I can't seem to find an >> example of anyone acutlay using those to make a java daemon. The whole >> reason I am using Java at all is because of JDBC, I tend to think that Java >> itself can take a flying leap, except that I just drool over JDBC, love it, >> love it! So if any of you have any pointers or URLs that would be great. >> >> >> Thanks, >> >> >> Eric >> >> (250) 655 - 9513 (PST Time Zone) >> >> "Inquiry is fatal to certainty." -- Will Durant >> >> >> >> >> >> ---------------------------(end of broadcast)--------------------------- >> TIP 5: Have you checked our extensive FAQ? >> >> http://www.postgresql.org/users-lounge/docs/faq.html >-- >Dave Cramer <Dave@micro-automation.net> > (250) 655 - 9513 (PST Time Zone) "Inquiry is fatal to certainty." -- Will Durant
Three options that I am aware of: 1)reading from stdin works, or 2)open a tcpip port and do request through that. 3)modify a file, and signal it (never done this, but I think it works) Dave On Sat, 2003-01-11 at 16:39, Eric Frazier wrote: > Hi, > > Comunicating with the outside world(UNIX) is what you would be missing, that > is what Posix is about. But I was finding it a little daunting. I have to > be able to send to or pipe to it from shell applications, but once you run a > normal app like you suggest, it gets its args[] and then how do you change > them for the next query? > > thanks, > > Eric > > At 07:01 PM 1/11/03 -0500, Dave Cramer wrote: > >Eric, > > > >Just create a class, put a main in it, and loop forever? > > > >That's all there is to it, unless I'm missing something. > > > >Dave > >On Sat, 2003-01-11 at 14:59, Eric Frazier wrote: > >> Hi, > >> > >> I have a very small Java application that connects to a remote host's DB and > >> does a simple query. I don't want to install a big framwork like Tomcat just > >> to do this one task, but it is pretty slow as it is running though a CGI > >> wrapper, and the startup time of the JVM is pretty noticeable. > >> > >> I do know that there is a daemon tools project from the Jakarta project, and > >> that there is also a Posix libary for Java. But I can't seem to find an > >> example of anyone acutlay using those to make a java daemon. The whole > >> reason I am using Java at all is because of JDBC, I tend to think that Java > >> itself can take a flying leap, except that I just drool over JDBC, love it, > >> love it! So if any of you have any pointers or URLs that would be great. > >> > >> > >> Thanks, > >> > >> > >> Eric > >> > >> (250) 655 - 9513 (PST Time Zone) > >> > >> "Inquiry is fatal to certainty." -- Will Durant > >> > >> > >> > >> > >> > >> ---------------------------(end of broadcast)--------------------------- > >> TIP 5: Have you checked our extensive FAQ? > >> > >> http://www.postgresql.org/users-lounge/docs/faq.html > >-- > >Dave Cramer <Dave@micro-automation.net> > > > > (250) 655 - 9513 (PST Time Zone) > > "Inquiry is fatal to certainty." -- Will Durant > > > > > > ---------------------------(end of broadcast)--------------------------- > TIP 6: Have you searched our list archives? > > http://archives.postgresql.org -- Dave Cramer <Dave@micro-automation.net>