Re: Tomcat 4.0.4, jndi, jdbc and postgresql [long]
On Tuesday 02 July 2002 16:27, Les Hughes wrote: Ok. Summary time. Martin reflects my experience - I dumped tyrex and used DBCP as well. But aren't we trying to go direct without a pool? Having said that I've only ever managed to get datasources working when DBCP is being used... Check that your driver jarfile does not contain the javax.sql extension classes. If it does, delete them and rejar. Some versions of Tomcat will ignore any jar that has these classes present. Be careful with this thought - I work with jdk1.4 which has these built in. Also, you don't specify a DataSourceFactory in your server.xml - see below. Here's a known (well as far as I know...) good postgres solution using DBCP. And that's the path I'll follow. Despite huge support from the list (I applied all suggested changes and patches) I was unable to make it work. Now I will try to understand the new model of DBCP. Thank you all for your support. przem -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
Tomcat 4.0.4, jndi, jdbc and postgresql [long]
Hi
I've just started to write servlets. Servlets that only do processing, without
connecting to database work fine, but I have some problems to get the
connection with postgresql via jdbc work.
Tomcat: 4.0.4 (on linux)
Postgresql: 7.2.1 (on linux)
Jdbc: pgjdbc2.jar (from jdbc.postgresql.org)
The servlet is quite simple:
import java.io.*;
import java.util.*;
import java.sql.*;
import javax.sql.*;
import javax.naming.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class InfoServlet extends HttpServlet {
Connection con;
private boolean conFree = true;
public void init() throws ServletException {
try {
Context initCtx = new InitialContext();
Context envCtx =
(Context)initCtx.lookup(java:comp/env);
DataSource ds = (DataSource)
envCtx.lookup(jdbc/BookDB);
Connection con = ds.getConnection();
} catch (Exception ex) {
throw new ServletException(Couldn't open connection
to database: + ex.getMessage());
}
}
public void destroy() {
try {
con.close();
} catch (SQLException ex) {
System.out.println(ex.getMessage());
}
}
public void doGet (HttpServletRequest request, HttpServletResponse
response) throws ServletException, IOException {
HttpSession session = request.getSession();
// set content-type header before accessing the Writer
response.setContentType(text/html);
response.setBufferSize(8192);
PrintWriter out = response.getWriter();
// then write the data of the response
out.println(html +
headtitleDuke's Bookstore/title/head);
}
}
in web/WEB-INF/web.xml I defined:
!DOCTYPE web-app
PUBLIC -//Sun Microsystems, Inc.//DTD Web Application 2.3//EN
http://java.sun.com/dtd/web-app_2_3.dtd;
web-app
display-nameCurrency Converter Application/display-name
description
Test servlet
/description
servlet
servlet-nameinfo/servlet-name
display-nameinfo/display-name
descriptionno description/description
servlet-classInfoServlet/servlet-class
/servlet
servlet-mapping
servlet-nameinfo/servlet-name
url-pattern/info/url-pattern
/servlet-mapping
session-config
session-timeout30/session-timeout
/session-config
resource-ref
res-ref-namejdbc/BookDB/res-ref-name
res-typejavax.sql.DataSource/res-type
res-authContainter/res-auth
/resource-ref
/web-app
And in server.xml in the contex of the application:
Context path=/bookstore docBase=bookstore debug=0
reloadable=true crossContext=true
Logger className=org.apache.catalina.logger.FileLogger
prefix=localhost_bookstore_log. suffix=.txt
timestamp=true/
Resource name=jdbc/BookDB auth=Container
type=javax.sql.DataSource/
ResourceParams name=jdbc/BookDB
parameter
nameuser/name
valuejava/value
/parameter
parameter
namepassword/name
valuejava/value
/parameter
parameter
namedriverClassName/name
valueorg.postgresql.Driver/value
/parameter
parameter
namedriverName/name
valuejdbc:postgresql:public/value
/parameter
/ResourceParams
/Context
I've tried a few different driverName parameters: (restarting Tomcat after
each change)
jdbc:postgresql://localhost/public
jdbc:postgresql://full.server.name/public
jdbc:postgresql:public
jdbc:postgresql://localhost/
But, despite the parameters, I always get the following error:
exception
javax.servlet.ServletException: Couldn't open connection to database:
Exception creating DataSource: org.hsql.jdbcDriver
at InfoServlet.init(Unknown Source)
at javax.servlet.GenericServlet.init(GenericServlet.java:258)
at
org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:918)
{cut}
I have no idea why Tomcat wants to connect using hsql driver. I grepped
through tomcat directory and found only one reference to this driver (in
examples section). I removed event the sample section, restarted Tomcat but
it didn't help.
Does anyone know what is wrong?
regards
Przem
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Re: Tomcat 4.0.4, jndi, jdbc and postgresql [long]
On Tuesday 02 July 2002 14:00, Les Hughes wrote: Two things, In your server.xml user I think should be username and driverName has been deprecated in favour of url which needs the servername and DB name as well (as in something like jdbc:postgresql://full.server.name/mybookdb - or whatever the DB is called) Ok. Now my configuration file looks as follows: Context path=/bookstore1 docBase=bookstore1 debug=0 reloadable=true crossContext=true Logger className=org.apache.catalina.logger.FileLogger prefix=localhost_bookstore1_log. suffix=.txt timestamp=true/ Resource name=jdbc/BookDB auth=Container type=javax.sql.DataSource/ ResourceParams name=jdbc/BookDB parameter nameusername/name valuejava/value /parameter parameter namepassword/name valuejava/value /parameter parameter namedriverClassName/name valueorg.postgresql.Driver/value /parameter parameter namedriverName/name valuejdbc:postgresql://willow.forest/public/value /parameter /ResourceParams /Context Are you *sure* you're using the right install of TC and that the server.xml has no reference to the hsql driver? I'm absolutely sure. I even reinstalled whole tomcat (to cleanup everything) BTW - only got this working with Oracle and mySQL so most of this is guesswork based on those two exercises. Bye, Les P.S. You shouldn't open the connection in init() nor cache the connection BTW - use a pool instead :) For sure I will, but now all that I want is to connect my servlet to database. regards przem -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
Re: Tomcat 4.0.4, jndi, jdbc and postgresql [long]
On Tuesday 02 July 2002 14:53, Przemyslaw Kowalczyk wrote: I came to another conclusion. Even if there was some reference to hsql driver in my server.xml it shouldn't affect my own servlet, as it uses its own context. Am I right? przem -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
Re: Tomcat 4.0.4, jndi, jdbc and postgresql [long]
On Tuesday 02 July 2002 14:56, [EMAIL PROTECTED] wrote: Would you have other applications running in tomcat? No, I've just started to learn, so there are other apps. przem -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
Re: Tomcat 4.0.4, jndi, jdbc and postgresql [long]
On Tuesday 02 July 2002 15:00, [EMAIL PROTECTED] wrote: Is this normal : resource-ref res-ref-namejdbc/BookDB/res-ref-name res-typejavax.sql.DataSource/res-type res-authContainter/res-auth /resource-ref More especially : res-authContainter/res-auth : CONTAINTER? You are right, there is a misseling, but correcting it didn't help much :-( I'm still curious why tomcat wants a hsql driver even though it's not mentioned in any configuration file. przem -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
Re: Tomcat 4.0.4, jndi, jdbc and postgresql [long]
On Tuesday 02 July 2002 15:06, Les Hughes wrote: web-app resource-ref descriptionDB Connection/description res-ref-namejdbc/TestDB/res-ref-name res-typejavax.sql.DataSource/res-type res-authContainer/res-auth /resource-ref /web-app The description is missing (but I dont have a DTD to had to tell whether this is optional) but other than that it's fine. Neither adding description nor removing slashes helped. I've checked the path in manual: jdbc:postgresql:database jdbc:postgresql://host/database jdbc:postgresql://host:port/database I wonder if there is a way to debug what exactly Tomcat does. What section of server.xml does it parse etc. Does anyone tried to connect to postgresql and succeeded? przem -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
Re: Tomcat 4.0.4, jndi, jdbc and postgresql [long]
On Tuesday 02 July 2002 15:16, Les Hughes wrote: Ignore the remove // comment - I was looking at my oracle notes :-) I really have no idea why it's trying to load the hsql driver if there's no ref in your server.xml Ok, the full versions (I cut off all comments): przem server.xml ---cut---here Server port=8005 shutdown=SHUTDOWN debug=0 Service name=Tomcat-Standalone Connector className=org.apache.catalina.connector.http.HttpConnector port=8080 minProcessors=5 maxProcessors=75 enableLookups=true redirectPort=8443 acceptCount=10 debug=0 connectionTimeout=6/ Engine name=Standalone defaultHost=localhost debug=0 Logger className=org.apache.catalina.logger.FileLogger prefix=catalina_log. suffix=.txt timestamp=true/ Realm className=org.apache.catalina.realm.MemoryRealm / Host name=localhost debug=0 appBase=webapps unpackWARs=true Valve className=org.apache.catalina.valves.AccessLogValve directory=logs prefix=localhost_access_log. suffix=.txt pattern=common/ Logger className=org.apache.catalina.logger.FileLogger directory=logs prefix=localhost_log. suffix=.txt timestamp=true/ Context path=/manager docBase=manager debug=0 privileged=true/ Context path=/bookstore1 docBase=bookstore1 debug=0 reloadable=true crossContext=true Logger className=org.apache.catalina.logger.FileLogger prefix=localhost_bookstore1_log. suffix=.txt timestamp=true/ Resource name=jdbc/BookDB auth=Container type=javax.sql.DataSource/ ResourceParams name=jdbc/BookDB parameter nameusername/name valuejava/value /parameter parameter namepassword/name valuejava/value /parameter parameter namedriverClassName/name valueorg.postgresql.Driver/value /parameter parameter namedriverName/name valuejdbc:postgresql:/localhost/public/value /parameter /ResourceParams /Context /Host /Engine /Service Service name=Tomcat-Apache Connector className=org.apache.catalina.connector.warp.WarpConnector port=8008 minProcessors=5 maxProcessors=75 enableLookups=true acceptCount=10 debug=0/ Engine className=org.apache.catalina.connector.warp.WarpEngine name=Apache defaultHost=localhost debug=0 appBase=webapps Logger className=org.apache.catalina.logger.FileLogger prefix=apache_log. suffix=.txt timestamp=true/ Realm className=org.apache.catalina.realm.MemoryRealm / /Engine /Service /Server ---cut---here web.xml ---cut---here !DOCTYPE web-app PUBLIC -//Sun Microsystems, Inc.//DTD Web Application 2.3//EN http://java.sun.com/dtd/web-app_2_3.dtd; web-app display-nameInfo Application/display-name description Just test application /description servlet servlet-nameinfo/servlet-name display-nameinfo/display-name descriptionno description/description servlet-classInfoServlet/servlet-class /servlet servlet-mapping servlet-nameinfo/servlet-name url-pattern/info/url-pattern /servlet-mapping session-config session-timeout30/session-timeout /session-config resource-ref descriptionDatabase Connection/description res-ref-namejdbc/BookDB/res-ref-name res-typejavax.sql.DataSource/res-type res-authContainer/res-auth /resource-ref /web-app ---cut---here--- -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
Re: Tomcat 4.0.4, jndi, jdbc and postgresql [long]
On Tuesday 02 July 2002 15:43, [EMAIL PROTECTED] wrote:
Do you have already connected to a postgresql db using a java app? Are you
sure the parameters are correct? What is public? Where did you put the
postgresql.jar?
Yes, without any problems from 'standalone' application. I'm able to query and
update database, so parameters (url, username and password) are ok.
There is no postgresql.jar, only pgjdbc2.jar. I put it in ${tomcat-root}/lib
directory. I tried first to add a link named postgresql.jar and then I've
renamed it but it didn't help :-(
Do you have a file named hsql.jar? Can you remove it?
I don't have such file.
przem
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