Обсуждение: newbB: Howto tell if jdbc is compiled-in?
Thanks Nick... I had already bookmarked the site to try out your test code, once I have all components installed. BTW, I'm interested in java servlets running under Apache Tomcat, using postgreSQL as the back-end store. Can anyone recommendany sites that discuss this combination? regards /j-p. On Tue, 12 Feb 2002, Nick Fankhauser wrote: > As the other folks mentioned, you only need to obtain the .jar file & put it > in your classpath to support jdbc. All the "with jdbc" switch does for you > is to build this file. So- it's easiest to just download the file from > http://jdbc.postgresql.org/download.html. If you're just starting, you may > find this web page useful: > > www.fankhausers.com/postgresql/jdbc > > -Nick > ----------------------- JUSTATEST Art Online www.justatest.com
> BTW, I'm interested in java servlets running under Apache Tomcat, > using postgreSQL as the back-end store. Can anyone recommend any > sites that discuss this combination? Tony Grant has a page describing this combination with the addition of Macromedia UltraDev: http://www.animaproductions.com/ultra.html It's just barely started, but I have a few notes about problems we encountered in connection with JDBC & Tomcat in here: http://www.fankhausers.com/tomcat/jdbc/. More to come as time allows... The combination you mention is exactly what we're using, and we found it quite easy to work with once you get past the setup hump, which was a real bear. Although I've found some other sites out there describing this setup, the information we ultimately ended up using all came from the "official" Tomcat site. In particular, take a look at the mod_jk documentation. -Nick
JP, I am running Linux RH 7.2, Apache (came with RH7.2 - don't know the number), Tomcat 3.2.3 and postgresql 7.2. All seems to be working fine. I have not stress tested it yet or put it in a live site. A beta site is next. Can't vouch for anything above 3.2.3 on Tomcat as I had problems with 3.2.4 and backed it down a level. Others on this list have mentioned Tomcat 4.X. Chime up. I still know of a site that has problems with a persistent connection to the database over a wan timing out but have been unable to flush out answers here. My config needs only the JVM,DB, and JDBC driver on the same machine for now. Lan later and Wan even further out. By then I should have or program a solution. Good luck - the above config seems to work fine. At 03:03 PM 2/12/2002 -0100, john-paul delaney wrote: >Thanks Nick... I had already bookmarked the site to try out your test >code, once I have all components installed. > >BTW, I'm interested in java servlets running under Apache Tomcat, using >postgreSQL as the back-end store. Can anyone recommend any sites that >discuss this combination? > >regards >/j-p. > > >On Tue, 12 Feb 2002, Nick Fankhauser wrote: > > > As the other folks mentioned, you only need to obtain the .jar file & > put it > > in your classpath to support jdbc. All the "with jdbc" switch does for you > > is to build this file. So- it's easiest to just download the file from > > http://jdbc.postgresql.org/download.html. If you're just starting, you may > > find this web page useful: > > > > www.fankhausers.com/postgresql/jdbc > > > > -Nick > > > > >----------------------- > JUSTATEST Art Online > www.justatest.com > > > > > >---------------------------(end of broadcast)--------------------------- >TIP 2: you can get off all lists at once with the unregister command > (send "unregister YourEmailAddressHere" to majordomo@postgresql.org)
(Thread Was: Howto tell if jdbc is compiled-in?) Thanks Peter... My setup is RH7.0 - Apache1.3.20 - Tomcat4.0.1 - PostgreSQL 7.1 I tested some basic sample servlets and they're working ok however when I try to run Nick's example code from the commandline - I get the 'NoClassDefFoundError' (which apparantly points to problems with the jdbc .jar not in the classpath). Nevertheless, even when I run the command line argument to specify the classpath, I get the same error. Nick mentions problems of this kind for users running Tomcat - as I don't understand what's causing the problem, I'd appreciatesome further explanation if possible. This is just for my own understanding - as the setup as is, is working ok. Secondly, I'm new to databases - postgreSQL is my first experience in this field, and I think I need a 'cheatsheet' on psqlcommands & syntax for beginners (such as SELECT TABLE_NAME FROM USER_TABLES; - not sure if that actually works) etc. Can anyone suggest any links or further reading on this? Again Many thanks /j-p. On Tue, 12 Feb 2002, Peter V. Cooper wrote: > JP, I am running Linux RH 7.2, Apache (came with RH7.2 - don't know the > number), Tomcat 3.2.3 > and postgresql 7.2. All seems to be working fine. I have not stress tested > it yet or put it in > a live site. A beta site is next. Can't vouch for anything above 3.2.3 on > Tomcat as I had problems > with 3.2.4 and backed it down a level. Others on this list have mentioned > Tomcat 4.X. Chime up. > I still know of a site that has problems with a persistent connection to > the database over a wan > timing out but have been unable to flush out answers here. My config needs > only the JVM,DB, and JDBC driver on the same machine for now. Lan later and > Wan even further out. By then I > should have or program a solution. Good luck - the above config seems to > work fine. > > At 03:03 PM 2/12/2002 -0100, john-paul delaney wrote: > > >Thanks Nick... I had already bookmarked the site to try out your test > >code, once I have all components installed. > > > >BTW, I'm interested in java servlets running under Apache Tomcat, using > >postgreSQL as the back-end store. Can anyone recommend any sites that > >discuss this combination? > > > >regards > >/j-p. > > > > > >On Tue, 12 Feb 2002, Nick Fankhauser wrote: > > > > > As the other folks mentioned, you only need to obtain the .jar file & > > put it > > > in your classpath to support jdbc. All the "with jdbc" switch does for you > > > is to build this file. So- it's easiest to just download the file from > > > http://jdbc.postgresql.org/download.html. If you're just starting, you may > > > find this web page useful: > > > > > > www.fankhausers.com/postgresql/jdbc > > > > > > -Nick > > > > > > > > >----------------------- > > JUSTATEST Art Online > > www.justatest.com > > > > > > > > > > > >---------------------------(end of broadcast)--------------------------- > >TIP 2: you can get off all lists at once with the unregister command > > (send "unregister YourEmailAddressHere" to majordomo@postgresql.org) > > > ---------------------------(end of broadcast)--------------------------- > TIP 5: Have you checked our extensive FAQ? > > http://www.postgresql.org/users-lounge/docs/faq.html > ----------------------- JUSTATEST Art Online www.justatest.com
> I tested some basic sample servlets and they're working ok Are these servlets with JDBC code in them, or just servlets testing Tomcat? > Nevertheless, even when I run the command line argument to > specify the classpath, I get the same error. > Nick mentions problems of this kind for users running Tomcat - as If you're getting the error when running from the command line, then this has nothing to do with Tomcat. The problem that seems to plague many new users of Tomcat is that since Tomcat runs as a detached process, new developers often forget to add the jdbc jar file to the classpath for the Tomcat process, or have trouble figuring out how to do this. Which line of the code is referenced for the 'NoClassDefFoundError' ? > Secondly, I'm new to databases - postgreSQL is my first > experience in this field, and I think I need a 'cheatsheet' on > psql commands & syntax for beginners (such as SELECT TABLE_NAME I think there's a brief sql tutorial in the postgresql docs on-line. You might also want to check out Bruce Momjian's book, which is still on-line in html: http://www.ca.postgresql.org/docs/aw_pgsql_book/index.html. He has a gentle intro to SQL in the psql environment. -Nick
This message came right on time to avoid putting down the wall with my head :-( I could not trace the source of the Broken Pipe message. RH7.1, jdk1.3.1, TC4.0.1: Broken Pipe RH7.2, jdk1.4.0-rc, TC4.0.2LE: java.net.SocketException: Socket closed RH7.2, jdk1.4.0-rc, TC3.2 embedded in NB3.3.1: No error??? I'm using Poolman2.1-b1. Please share your experiences. Thank you all. -----Original Message----- From: Nick Fankhauser <nickf@ontko.com> To: john-paul delaney <jp@justatest.com>; pgsql-jdbc@postgresql.org <pgsql-jdbc@postgresql.org> Date: Tuesday, February 12, 2002 9:42 AM Subject: Re: [JDBC] newbB: Howto tell if jdbc is compiled-in? > > >> BTW, I'm interested in java servlets running under Apache Tomcat, >> using postgreSQL as the back-end store. Can anyone recommend any >> sites that discuss this combination? > >Tony Grant has a page describing this combination with the addition of >Macromedia UltraDev: http://www.animaproductions.com/ultra.html > >It's just barely started, but I have a few notes about problems we >encountered in connection with JDBC & Tomcat in here: >http://www.fankhausers.com/tomcat/jdbc/. More to come as time allows... The >combination you mention is exactly what we're using, and we found it quite >easy to work with once you get past the setup hump, which was a real bear. >Although I've found some other sites out there describing this setup, the >information we ultimately ended up using all came from the "official" Tomcat >site. In particular, take a look at the mod_jk documentation. > >-Nick > > > > > > > >---------------------------(end of broadcast)--------------------------- >TIP 2: you can get off all lists at once with the unregister command > (send "unregister YourEmailAddressHere" to majordomo@postgresql.org)