Hi Mohammed, The resource-ref of your web.xml looks alright. While
the DefaultContext should work if you place it in the correct
location(see notes below) within your server.xml, I doubt you want
this to be your final solution. My final fix was suggested by Steve
and noted here...
Copy the <Context... >(you need to change your DefaultContext tag to a
Context tag) from your server.xml to a file all its own and name that
file myapp.xml(in your case I guess that would be SteaDB.xml). Then
mv that file to $CATALINA_HOME/conf/Catalina/localhost/
Restart your app or shutdown and startup Tomcat and you should be all set.
Let me know how it goes.
Eric
Notes:
- I'm not sure if DefaultContext or Context within your server.xml
have any effect once you have a myapp.xml at
$CATALINA_HOME/conf/Catalina/localhost/. I still have a Context in my
server.xml.
- I don't think it matters but fyi, my Context only includes a
Resource, and then Resource-Params as follows: username, password,
driverClass, and url.
- When working with the DefaultContext, location for that tag should
be within the <Engine... > tag having the Standalone attribute. This
likely needs to be un-commented, hence you will need to comment out
the <Engine... > tag with the Catlina attribute, which is likely just
below in the server.xml.
On Tue, 9 Nov 2004 14:25:41 +0100, Akacem Mohammed
<[EMAIL PROTECTED]> wrote:
> Hello,
>
> I am stuck in the same Probleme as Erik. I did exactly what in the e-mails
> suggested is with no success.
> I am runing TC 5.0.28 und try to get a connection to an informix database.
> I got the following Error Message:
>
> org.apache.commons.dbcp.SQLNestedException: Cannot create JDBC driver of
> class '' for connect URL 'null'
>
> mycode :
>
> try {
> initCtx = new InitialContext();
> envCtx = (Context) initCtx.lookup("java:comp/env");
> ds = (DataSource) envCtx.lookup("jdbc/SteaDB");
> } catch (NamingException e) {
> // TODO Auto-generated catch block
>
> e.printStackTrace();
> }
> try {
> conn=ds.getConnection();
> } catch (SQLException e2) {
> // TODO Auto-generated catch block
> e2.printStackTrace();
> }
>
> My Configuration is as follow:
>
> web.xml :
>
> <resource-ref>
> <description>DB Connection to informix</description>
> <res-ref-name>jdbc/SteaDB</res-ref-name>
> <res-type>javax.sql.DataSource</res-type>
> <res-auth>Container</res-auth>
> </resource-ref>
>
> server.xml :
>
> <DefaultContext>
> <Resource name="jdbc/SteaDB" auth="Container" type="javax.sql.DataSource"/>
>
> <ResourceParams name="jdbc/SteaDB">
> <parameter>
> <name>factory</name>
> <value>org.apache.commons.dbcp.BasicDataSourceFactory</value>
> </parameter>
> <!-- Maximum time to wait for a dB connection to become available
> in ms, in this example 10 seconds. An Exception is thrown if
> this timeout is exceeded. Set to -1 to wait indefinitely.
> -->
> <parameter>
> <name>maxWait</name>
> <value>10000</value>
> </parameter>
>
> <!-- username and password for dB connections -->
> <parameter>
> <name>username</name>
> <value>unknown</value>
> </parameter>
> <parameter>
> <name>password</name>
> <value>unknown</value>
> </parameter>
>
> <!-- Class name for the informix treiber -->
> <parameter>
> <name>driverClassName</name>
> <value>com.informix.jdbc.IfxDriver</value>
> </parameter>
>
> <parameter>
> <name>url</name>
> <value>
>
> jdbc:informix-sqli://s0062033.vt.bb.de:300056/coadb:informixserver=coadbzentral
> </value>
> </parameter>
>
> <parameter>
> <name>removeAbandoned</name>
> <value>true</value>
> </parameter>
> <parameter>
> <name>removeAbandonedTimeout</name>
> <value>300</value> <!-- in second -->
> </parameter>
>
> <parameter>
> <name>logAbandoned</name>
> <value>true</value>
> </parameter>
>
> </ResourceParams>
> </DefaultContext>
>
> thanks for any hint
>
> Mohammed
>
> -----Ursprüngliche Nachricht-----
> Von: Steve Kirk [mailto:[EMAIL PROTECTED]
> Gesendet: Dienstag, 9. November 2004 01:40
> An: 'Eric Wulff'; 'Tomcat Users List'
> Betreff: RE: connection pooling
>
> Worth clarifyig what we are meaning by "DBCP". The DBCP I was referring to
> was the specific implementation of connection pooling that is part of
> Jakarta Commons:
> http://jakarta.apache.org/commons/dbcp/
>
> There are other pooling implementations which are alternatives to Commons
> DBCP.
>
> Some DB drivers included pooling support as-is. Others do not. For those
> that do not, you need to implement pooling by building code around the
> standard driver. You used to have to do this yourself, but now there is
> DBCP to take care of this for you. DBCP is a "wrapper" used around a
> non-pooling DB driver.
>
> So, hence my question, are you intending to use DBCP, or does your Informix
> driver include pooling?
>
> From the JNDI/JDBC guides it appears that you have the choice of using DBCP
> or not (although there is one aspect of the docs that seem slightly unclear
> on that, which I am going start another thread to clear up). The configs
> are similar. Personally I have only got the DBCP approach to work, hence my
> suggestion of using that, for which you need to include the factory
> parameter. What this does is basically tells TC to call DBCP rather than
> your database driver when making a connection - DBCP then calls your DB
> driver if and when it needs to.
>
> I think I'm right in saying that if you don't explcitly use DBCP, and your
> DB driver does not support pooling, you will end up with non-pooled
> connections. The webapp will still work but you will not have the
> advantages of pooling.
>
> In case it helps, here are my ResourceParams. Note that I have both
> "factory" and "driverClassName":
>
> <ResourceParams name="jdbc/myDb">
> <parameter>
> <name>factory</name>
>
> <value>org.apache.commons.dbcp.BasicDataSourceFactory</value>
> </parameter>
> <parameter>
> <name>driverClassName</name>
> <value>com.mysql.jdbc.Driver</value>
> </parameter>
> <parameter>
> <name>username</name>
> <value>me</value>
> </parameter>
> <parameter>
> <name>password</name>
> <value>secret</value>
> </parameter>
> <parameter>
> <name>url</name>
> <value>jdbc:mysql://localhost:3306/myDb</value>
> </parameter>
> </ResourceParams>
>
> > -----Original Message-----
> > From: Eric Wulff [mailto:[EMAIL PROTECTED]
> > Sent: Friday 05 November 2004 18:34
> > To: Steve Kirk
> > Cc: Tomcat Users List
> > Subject: Re: connection pooling
> >
> >
> > Steve, I am trying to use DBCP(hence the subject of the thread) and I
> > believe I have a driver that supports it. Especially considering that
> > the connection works when I wrap my data resource in a DefaultContext
> > tag inside a stand alone Engine tag(server.xml), instead of inside a
> > Context tag(how all instructions I've followed so far suggest).
> >
> > This means my driver support DBCP, correct?
> >
> > The only source code I imagine would help is the code I use to gain
> > connection...
> >
> > Context initialContext = new InitialContext();
> > Context context = (Context) initialContext.lookup("java:comp/env");
> > DataSource dataSource = (DataSource) context.lookup("jdbc/wms");
> > connection = dataSource.getConnection();
> >
> > I have seen no mention of this factory class parameter you speak of.
> > I'm using TC 5.0.28. I'll try it.
> >
> > thx much for your help
> > Eric
> >
> >
> > On Fri, 5 Nov 2004 13:30:35 -0000, Steve Kirk
> > <[EMAIL PROTECTED]> wrote:
> > > Eric - you are correct, you do not need both
> > <resource-ref> and <Resource>
> > > (although I've found that having both does not cause a problem).
> > >
> > > Back to your problem.
> > >
> > > The error message indicates that TC cannot find the Resource.
> > >
> > > I'm not sure if you are trying to use DBCP or not (in other
> > words, does the
> > > informix driver support pooling on its own, or do you in
> > fact need DBCP or
> > > some other implementation wrapped around it)? You have
> > > <res-type>javax.sql.DataSource</res-type> but do not list
> > the factory class
> > > under your Resource, e.g. :
> > > <parameter>
> > > <name>factory</name>
> > >
> > <value>org.apache.commons.dbcp.BasicDataSourceFactory</value>
> > > </parameter>
> > >
> > > I have not seen any Java source code on this thread, maybe
> > you posted it
> > > before I started reading it.
> > >
> > > Thinking slightly laterally I'll pass on something I
> > learned from Yoav
> > > recently on this list.... you don't need to use
> > container-managed resources
> > > to do connection pooling. In other words you don't need to
> > set any Resource
> > > or Context to get it to work.
> > >
> > >
> > >
> > > > -----Original Message-----
> > > > From: Eric Wulff [mailto:[EMAIL PROTECTED]
> > > > Sent: Friday 05 November 2004 05:57
> > > > To: Tomcat Users List; Atishay Kumar
> > > > Subject: Re: connection pooling
> > > >
> > > >
> > > > Thx for your input but, as mentioned in my previous message, I've
> > > > tried this and it does not work. Also, considering my web.xml I
> > > > shouldn't need this, correct? I have a <resource-ref> in
> > my web.xml.
> > > >
> > > > Eric
> > > >
> > > >
> > > > On Fri, 5 Nov 2004 11:01:05 +0530, Atishay Kumar
> > > > <[EMAIL PROTECTED]> wrote:
> > > > >
> > > > > Pls do the following change after <context......> and u are on!!
> > > > > cheers
> > > > >
> > > > >
> > > > > On Thu, 4 Nov 2004 19:46:30 -0800, Eric Wulff
> > > > <[EMAIL PROTECTED]> wrote:
> > > > > > Hi all, I'm returning to a problem I couldn't solve the
> > > > first time,
> > > > > > about two months ago, and still can't seem to figure out.
> > > > I can't get
> > > > > > a db connection using connection pools. I get the
> > > > exception listed
> > > > > > below, same as so many have previously, but nothing I've
> > > > found seems
> > > > > > to works. Below are my specs. Anyone with concrete
> > > > advise/direction
> > > > > > on how to get
> > > > > > this working?
> > > > > >
> > > > > > Also, I noticed in many solutions the suggestion was made
> > > > to edit the
> > > > > > myapp.xml file located at
> > CATALINA_HOME/conf/Catalina/localhost/.
> > > > > > However, there is no myapp.xml in that directory on my
> > > > server. Just 2
> > > > > > .xml's related to other applications and a manager.xml
> > > > which I'm not
> > > > > > sure what it's related to.
> > > > > >
> > > > > > OS: FC2
> > > > > > Tomcat 5.0.28
> > > > > >
> > > > > > exception: org.apache.commons.dbcp.SWLNestedException:
> > > > Cannot create
> > > > > > JDBC driver class '' for connect URL 'null'
> > > > > >
> > > > > > WEB-INF web xml: code inserted AFTER all servlet mappings...
> > > > > > <resource-ref>
> > > > > > <res-ref-name>jdbc/wms</res-ref-name>
> > > > > > <res-type>javax.sql.DataSource</res-type>
> > > > > > <res-auth>Container</res-auth>
> > > > > > </resource-ref>
> > > > > >
> > > > > > server xml(tried this with and without a Resource name)...
> > > > > > <Context path="/wms" docBase="wms" debug="0"
> > reloadable="true">
> > > > >
> > > > > <Resource name="jdbc/wms" auth="Container"
> > > > type="javax.sql.DataSource"/>
> > > > >
> > > > >
> > > > >
> > > > > > <ResourceParams name="jdbc/wms">
> > > > > > <parameter>
> > > > > > <name>username</name>
> > > > > > <value>whatever</value>
> > > > > > </parameter>
> > > > > > <parameter>
> > > > > > <name>password</name>
> > > > > > <value>whatever</value>
> > > > > > </parameter>
> > > > > > <parameter>
> > > > > > <name>driverClassName</name>
> > > > > > <value>com.informix.jdbc.IfxDriver</value>
> > > > > > </parameter>
> > > > > > <parameter>
> > > > > > <name>url</name>
> > > > > >
> > > > <value>jdbc:informix-sqli://foo.bar.com:somePort/dbName:INFORM
> > > > IXSERVER=serverName</value>
> > > > > > </parameter>
> > > > > > </ResourceParams>
> > > > > > </Context>
> > > > > >
> > > > > > I have the following jars in my
> > > > <CATALINA_HONE>/common/lib and I also
> > > > > > tried putting the db driver and commons-collections,
> > > > dbcp, and pool in
> > > > > > my WEB-INF/lib with no success. They are all mode 644.
> > > > > >
> > > > > > ant.jar
> > > > > > ant-launcher.jar
> > > > > > commons-collections-3.1.jar
> > > > > > commons-dbcp-1.2.1.jar
> > > > > > commons-el.jar
> > > > > > commons-pool-1.2.jar
> > > > > > ifxjdbc.jar (the necessary informix driver)
> > > > > > jar.txt
> > > > > > jasper-compiler.jar
> > > > > > jasper-runtime.jar
> > > > > > jsp-api.jar
> > > > > > mysql-connector-java-3.0.15-ga-bin.jar
> > > > > > naming-common.jar
> > > > > > naming-factory.jar
> > > > > > naming-java.jar
> > > > > > naming-resources.jar
> > > > > > servlet-api.jar
> > > > > >
> > > > > > On Fri, 8 Oct 2004 11:45:59 +0530, Atishay Kumar
> > > > > > <[EMAIL PROTECTED]> wrote:
> > > > > > > hi,
> > > > > > > i am not sure but you may try downloading latest
> > jar files for
> > > > > > > following froom tomcat site and try them out. copy the
> > > > old jar files
> > > > > > > somewhere else and try using the latest jar files.
> > > > > > > 1) Commons Collections
> > > > > > > 2)Commons DBCP
> > > > > > > 3)Commons Pool
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > > On Thu, 7 Oct 2004 15:29:40 -0700, Eric Wulff
> > > > <[EMAIL PROTECTED]> wrote:
> > > > > > > > Except that the driver works for connecting if I'm
> > > > not utilizing a
> > > > > > > > connection pool, i.e., I am able to connect to the db
> > > > and manipulate
> > > > > > > > data via DriverManager.getConnection(url, db, pwd).
> > > > > > > >
> > > > > > > > The driver is located in CATALINA_HOME/commons/lib
> > > > > > > >
> > > > > > > > Eric
> > > > > > > >
> > > > > > > > On Thu, 7 Oct 2004 18:22:45 -0400, Phillip Qin
> > > > > > > > <[EMAIL PROTECTED]> wrote:
> > > > > > > > > No, you don't need that many params. I think your
> > > > problem might be the
> > > > > > > >
> > > > > > > >
> > > > > > > > > driver. Where did you drop off your informix jdbc jar?
> > > > > > > > >
> > > > > > > > >
> > > > > > > > > -----Original Message-----
> > > > > > > > > From: Eric Wulff [mailto:[EMAIL PROTECTED]
> > > > > > > > > Sent: October 7, 2004 5:56 PM
> > > > > > > > > To: Tomcat Users List
> > > > > > > > > Subject: Re: connection pooling
> > > > > > > > >
> > > > > > > > > Yes, I have added <Resource name=... >. Now
> > > > different errors are reported
> > > > > > > > > via stack trace as I posted in response to
> > > > Atishay's suggestion that I add
> > > > > > > > > this. I'll try adding your suggestions and see
> > > > what happens. Also, you
> > > > > > > > > suggest adding many parameters. Are they necessary
> > > > for simply making a
> > > > > > > > > connection? If so, the tutorial I'm following,
> > > > 'Tomcat Kick Start' left all
> > > > > > > > > your suggestions out.
> > > > > > > > > Including the <Resource> tag, but that seems
> > > > critical for connection.
> > > > > > > > >
> > > > > > > > > Eric
> > > > > > > > >
> > > > > > > > > On Thu, 7 Oct 2004 17:14:27 -0400, Phillip Qin
> > > > <[EMAIL PROTECTED]>
> > > > > > > > > wrote:
> > > > > > > > > > 1. web.xml: OK
> > > > > > > > > >
> > > > > > > > > > 2. context.xml on <context> of server.xml:
> > > > > > > > > >
> > > > > > > > > > <Resource name="jdbc/test_connect"
> > > > auth="Container"
> > > > > > > > > > type="javax.sql.DataSource"/> <= have you added this?
> > > > > > > > > > <ResourceParams name="jdbc/test_connect">
> > > > > > > > > > <parameter>
> > > > > > > > > > <name>driverClassName</name>
> > > > > > > > > > <value>your.jdbc.driver</value>
> > > > > > > > > > </parameter>
> > > > > > > > > > <parameter>
> > > > > > > > > > <name>url</name>
> > > > > > > > > > <value>your.jdbc.url</value>
> > > > > > > > > > </parameter>
> > > > > > > > > > <parameter>
> > > > > > > > > > <name>username</name>
> > > > > > > > > > <value>youruser</value>
> > > > > > > > > > </parameter>
> > > > > > > > > > <parameter>
> > > > > > > > > > <name>password</name>
> > > > > > > > > > <value>yourpass</value>
> > > > > > > > > > </parameter>
> > > > > > > > > > <parameter>
> > > > > > > > > > <name>maxActive</name>
> > > > > > > > > > <value>20</value>
> > > > > > > > > > </parameter>
> > > > > > > > > > <parameter>
> > > > > > > > > > <name>maxIdle</name>
> > > > > > > > > > <value>10</value>
> > > > > > > > > > </parameter>
> > > > > > > > > > <parameter>
> > > > > > > > > > <name>minIdle</name>
> > > > > > > > > > <value>10</value>
> > > > > > > > > > </parameter>
> > > > > > > > > > <parameter>
> > > > > > > > > > <name>maxWait</name>
> > > > > > > > > > <value>15000</value>
> > > > > > > > > > </parameter>
> > > > > > > > > > <parameter>
> > > > > > > > > > <name>removeAbandoned</name>
> > > > > > > > > > <value>true</value>
> > > > > > > > > > </parameter>
> > > > > > > > > > <parameter>
> > > > > > > > > > <name>validationQuery</name>
> > > > > > > > > > <value>your_query</value>
> > > > > > > > > > </parameter>
> > > > > > > > > > <parameter>
> > > > > > > > > > <name>testOnBorrow</name>
> > > > > > > > > > <value>true</value>
> > > > > > > > > > </parameter>
> > > > > > > > > > <parameter>
> > > > > > > > > > <name>testOnReturn</name>
> > > > > > > > > > <value>true</value>
> > > > > > > > > > </parameter>
> > > > > > > > > > <parameter>
> > > > > > > > > >
> > <name>minEvictableIdleTimeMillis</name>
> > > > > > > > > > <value>-1</value>
> > > > > > > > > > </parameter>
> > > > > > > > > > <!-- sleeps 5 minutes -->
> > > > > > > > > > <parameter>
> > > > > > > > > >
> > <name>timeBetweenEvictionRunsMillis</name>
> > > > > > > > > > <value>300000</value>
> > > > > > > > > > </parameter>
> > > > > > > > > > <parameter>
> > > > > > > > > > <name>numTestsPerEvictionRun</name>
> > > > > > > > > > <value>1</value>
> > > > > > > > > > </parameter>
> > > > > > > > > > <parameter>
> > > > > > > > > > <name>testWhileIdle</name>
> > > > > > > > > > <value>true</value>
> > > > > > > > > > </parameter>
> > > > > > > > > >
> > > > > > > > > > </ResourceParams>
> > > > > > > > > >
> > > > > > > > > > 3. code
> > > > > > > > > >
> > > > > > > > > > Context initContext = new
> > > > InitialContext();
> > > > > > > > > > Context jdbcContext = (Context)
> > > > > > > > > > initContext.lookup("java:comp/env");
> > > > > > > > > > DataSource dataSource = (DataSource)
> > > > > > > > > > jdbcContext.lookup("jdbc/test_connect");
> > > > > > > > > > ...
> > > > > > > > > >
> > > > > > > > > >
> > > > > > > > > > -----Original Message-----
> > > > > > > > > > From: Eric Wulff [mailto:[EMAIL PROTECTED]
> > > > > > > > > > Sent: October 7, 2004 4:34 PM
> > > > > > > > > > To: Tomcat Users List
> > > > > > > > > > Subject: Re: connection pooling
> > > > > > > > > >
> > > > > > > > > > Hi Phillip,
> > > > > > > > > >
> > > > > > > > > > On Thu, 7 Oct 2004 09:29:09 -0400, you wrote:
> > > > > > > > > > > Detail, detail, detail.
> > > > > > > > > > >
> > > > > > > > > > > 1. your context.xml
> > > > > > > > > > > 2. your web.xml
> > > > > > > > > > > 3. how do you obtain connection from pool, java
> > > > code pls. 4. can you
> > > > > > > > > > > connect using pool 5. commons-pool version
> > > > > > > > > > >
> > > > > > > > > > > Etc. etc.
> > > > > > > > > > >
> > > > > > > > > > > You need to provide details otherwise we can't help.
> > > > > > > > > >
> > > > > > > > > > This was all included in my original post. Ok,
> > > > actually my 2nd post
> > > > > > > > > > because I accidentally hit send prior to
> > > > completing my post via the
> > > > > > > > > > scroll pad on my laptop. Still, thx for checking
> > > > on this and the info
> > > > > > > > > > you looking for is copied again here...
> > > > > > > > > >
> > > > > > > > > > System:
> > > > > > > > > > Tomcat 5 on Fedora Core 2 connecting to a db on
> > > > an Informix Dynamic
> > > > > > > > > > Server 9.4 on Windows Server
> > > > > > > > > >
> > > > > > > > > > -I am able to connect to my db via typical JDBC
> > > > > > > > > > DriverManager.getConnection(). This leads me to
> > > > believe that my
> > > > > > > > > > informix jdbc driver is in the correct place...
> > > > > > > > > > CATALINA_HOME/common/lib -I have a Context set up
> > > > in my server.xml per
> > > > > > > > > > examples in a text tutorial I'm referencing
> > > > > > > > > >
> > > > > > > > > > Below listed...
> > > > > > > > > > -errors
> > > > > > > > > > -web.xml
> > > > > > > > > > -server.xml <Context> (minus connection actual values)
> > > > > > > > > > -.java
> > > > > > > > > >
> > > > > > > > > > exception/errors:
> > > > > > > > > > -Exception:
> > > > org.apache.commons.dbcp.SQLNestedException: Cannot create
> > > > > > > > > > JDBC driver of class '' for connect URL 'null'
> > > > SQL state: null Error
> > > > > > > > > > code: 0
> > > > > > > > > >
> > > > > > > > > > -stack trace reveals this, but I can't see why
> > > > since I have the driver
> > > > > > > > > > in the correct directory...
> > > > > > > > > > java.sql.SQLException: No suitable driver at
> > > > > > > > > >
> > > > java.sql.DriverManager.getDriver(DriverManager.java:243) at
> > > > > > > > > >
> > > >
> > org.apache.commons.dbcp.BasicDataSource.createDataSource(BasicDataSour
> > > > > > > > > > ce.jav
> > > > > > > > > > a:773)
> > > > > > > > > >
> > > > > > > > > > web.xml:
> > > > > > > > > > <?xml version="1.0" encoding="ISO-8859-1"?>
> > > > > > > > > > <!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>
> > > > > > > > > > <servlet>
> > > > > > > > > > <servlet-name>Test Connection
> > > > Pooling</servlet-name>
> > > > > > > > > >
> > > > <servlet-class>TestConnectionPooling</servlet-class>
> > > > > > > > > > </servlet>
> > > > > > > > > >
> > > > > > > > > > <servlet-mapping>
> > > > > > > > > > <servlet-name>Test Connection
> > > > Pooling</servlet-name>
> > > > > > > > > >
> > > > <url-pattern>/testConnectionPooling</url-pattern>
> > > > > > > > > > </servlet-mapping>
> > > > > > > > > >
> > > > > > > > > > <resource-ref>
> > > > > > > > > >
> > <res-ref-name>jdbc/test_connect</res-ref-name>
> > > > > > > > > > <res-type>javax.sql.DataSource</res-type>
> > > > > > > > > > <res-auth>Container</res-auth>
> > > > > > > > > > </resource-ref>
> > > > > > > > > > </web-app>
> > > > > > > > > >
> > > > > > > > > > server.xml <Context>:
> > > > > > > > > > <Context path="/testConnectionPooling"
> > > > > > > > > > docBase="testConnectionPooling" debug="0"
> > > > reloadable="true">
> > > > > > > > > > <ResourceParams name="jdbc/test_connect">
> > > > > > > > > > <parameter>
> > > > > > > > > > <name>username</name>
> > > > > > > > > > <value>informix</value>
> > > > > > > > > > </parameter>
> > > > > > > > > > <parameter>
> > > > > > > > > > <name>password</name>
> > > > > > > > > > <value>informix</value>
> > > > > > > > > > </parameter>
> > > > > > > > > > <parameter>
> > > > > > > > > > <name>driverClassName</name>
> > > > > > > > > > <value>com.informix.jdbc.IfxDriver</value>
> > > > > > > > > > </parameter>
> > > > > > > > > > <parameter>
> > > > > > > > > > <name>url</name>
> > > > > > > > > >
> > > >
> > <value>jdbc:informix-sqli://url:port/dbName:INFORMIXSERVER=serverName<
> > > > > > > > > > /value
> > > > > > > > > > >
> > > > > > > > > > </parameter>
> > > > > > > > > > </ResourceParams>
> > > > > > > > > > </Context>
> > > > > > > > > >
> > > > > > > > > > .java:
> > > > > > > > > > import java.io.*;
> > > > > > > > > > import java.sql.*;
> > > > > > > > > > // -Must import javax.naming use JNDI which is
> > > > required to implement data
> > > > > > > > > > // resource references and hence connection pooling.
> > > > > > > > > > import javax.naming.*;
> > > > > > > > > > import javax.sql.*;
> > > > > > > > > > import javax.servlet.*;
> > > > > > > > > > import javax.servlet.http.*;
> > > > > > > > > > import java.util.*;
> > > > > > > > > >
> > > > > > > > > > public class TestConnectionPooling extends
> > HttpServlet {
> > > > > > > > > > private DataSource dataSource;
> > > > > > > > > >
> > > > > > > > > > public void init(ServletConfig config)
> > > > throws ServletException {
> > > > > > > > > > try {
> > > > > > > > > > Context init = new
> > > > InitialContext();
> > > > > > > > > > // don't know what the
> > > > 'java:comp/env' refers to
> > > > > > > > > > Context ctx = (Context)
> > > > > > > > > init.lookup("java:comp/env");
> > > > > > > > > > // I know "jdbc/conversion
> > > > must match the
> > > > > > > > > > web.xml res-ref-name of the web.xml but don't
> > > > know what the path really
> > > > > > > > > refers to
> > > > > > > > > > dataSource = (DataSource)
> > > > > > > > > > ctx.lookup("jdbc/test_connect");
> > > > > > > > > > } catch (NamingException ex) {
> > > > > > > > > > throw new
> > > > ServletException("Cannot retrieve
> > > > > > > > > > java:comp/env/jdbc/test_connect",ex);
> > > > > > > > > > }
> > > > > > > > > > }
> > > > > > > > > >
> > > > > > > > > > public void doGet(HttpServletRequest request,
> > > > > > > > > > HttpServletResponse
> > > > > > > > > > response)
> > > > > > > > > > throws ServletException, IOException {
> > > > > > > > > > response.setContentType("text/html");
> > > > > > > > > > PrintWriter out = response.getWriter();
> > > > > > > > > > Connection connection = null;
> > > > > > > > > > out.println
> > > > ("<HTML><HEAD><TITLE>Test Connection
> > > > > > > > > > Pooling</TITLE></HEAD><BODY>");
> > > > > > > > > > out.println("<H1>Customer Name
> > > > Query</H1>");
> > > > > > > > > >
> > > > > > > > > > try {
> > > > > > > > > > synchronized(dataSource) {
> > > > > > > > > > connection =
> > > > dataSource.getConnection();
> > > > > > > > > > }
> > > > > > > > > > out.println("<br>");
> > > > > > > > > >
> > > > out.println("<strong>Loaded informix driver
> > > > > > > > > > successfully via server.xml.</strong>" +
> > > > > > > > > >
> > > > "Now attempting db
> > > > > > > > > > connection.");
> > > > > > > > > > out.println("<br>");
> > > > > > > > > > PreparedStatement pstmt =
> > > > > > > > > > connection.prepareStatement("SELECT blah FROM
> > blah blah");
> > > > > > > > > > ResultSet results =
> > > > pstmt.executeQuery();
> > > > > > > > > > if (!results.next()) {
> > > > > > > > > > throw new
> > > > SQLException("No data
> > > > > > > > > > returned for some reason");
> > > > > > > > > > }
> > > > > > > > > > out.println("<br>");
> > > > > > > > > > while(results.next()) {
> > > > > > > > > >
> > out.println("<tr><td>" +
> > > > > > > > > > results.getString("blah") + "</td></tr>");
> > > > > > > > > > }
> > > > > > > > > > } catch (Exception ex) {
> > > > > > > > > > out.println("<br>");
> > > > > > > > > >
> > out.println("Exception: " + ex);
> > > > > > > > > > if(ex instanceof
> > SQLException) {
> > > > > > > > > > SQLException sqlex
> > > > = (SQLException) ex;
> > > > > > > > > > out.println("<br>");
> > > > > > > > > > out.println("SQL state:
> > > > > > > > > > "+sqlex.getSQLState()+"<BR>");
> > > > > > > > > > out.println("<br>");
> > > > > > > > > >
> > out.println("Error code:
> > > > > > > > > > "+sqlex.getErrorCode()+"<BR>");
> > > > > > > > > >
> > out.println("<br><br>");
> > > > > > > > > >
> > sqlex.printStackTrace(out);
> > > > > > > > > >
> > out.println("<br><br>");
> > > > > > > > > > }
> > > > > > > > > > }
> > > > > > > > > > finally {
> > > > > > > > > > try { connection.close(); } catch
> > > > (Exception ex) {}
> > > > > > > > > > }
> > > > > > > > > > out.println ("</BODY></HTML>");
> > > > > > > > > > }
> > > > > > > > > > }
> > > > > > > > > >
> > > > > > > > > > ReplyForward
> > > > > > > > > >
> > > > > > > > > > [EMAIL PROTECTED]
> > > > > > > > > > java code: Context ctx = (Context)
> > > > init.lookup("xxxxxx"); server.xml:
> > > > > > > > > > <Resour...
> > > > > > > > > > Oct 6 (22 hours ago)
> > > > > > > > > >
> > > > > > > > > > [EMAIL PROTECTED]
> > > > > > > > > > Please ignore my last post - it's wrong.
> > > > (Answered before verifying).
> > > > > > > > > > Oct 6 (22 hours ago)
> > > > > > > > > >
> > > > > > > > > > [EMAIL PROTECTED]
> > > > > > > > > > Is that litterally what you have in your server.xml?
> > > > > > > > > > Oct 6 (22 hours ago)
> > > > > > > > > >
> > > > > > > > > > Eric Wulff
> > > > > > > > > > No, literally I have the actual values. The same
> > > > connection string I
> > > > > > > > > > use to s...
> > > > > > > > > > Oct 6 (22 hours ago)
> > > > > > > > > >
> > > > > > > > > > [EMAIL PROTECTED]
> > > > > > > > > > Is there a xxxxx.xml file in
> > > > (TOMCAT_HOME)/conf/Catalina/localhost,
> > > > > > > > > > where xxx...
> > > > > > > > > > Oct 6 (22 hours ago)
> > > > > > > > > >
> > > > > > > > > > Eric Wulff
> > > > > > > > > > Context name? I assume your referring to the
> > > > ResourceParams name
> > > > > > > > > > attribute, j...
> > > > > > > > > > Oct 6 (19 hours ago)
> > > > > > > > > >
> > > > > > > > > > Phillip Qin
> > > > > > > > > > <[EMAIL PROTECTED]> to Tomcat
> > > > > > > > > > More options 6:29am (7 hours ago)
> > > > > > > > > > Detail, detail, detail.
> > > > > > > > > >
> > > > > > > > > > 1. your context.xml
> > > > > > > > > > 2. your web.xml
> > > > > > > > > > 3. how do you obtain connection from pool,
> > java code pls.
> > > > > > > > > > 4. can you connect using pool
> > > > > > > > > > 5. commons-pool version
> > > > > > > > > >
> > > > > > > > > > Etc. etc.
> > > > > > > > > >
> > > > > > > > > > You need to provide details otherwise we can't help.
> > > > > > > > > > - Show quoted text -
> > > > > > > > > >
> > > > > > > > > > -----Original Message-----
> > > > > > > > > > From: Eric Wulff [mailto:[EMAIL PROTECTED]
> > > > > > > > > > Sent: October 6, 2004 5:09 PM
> > > > > > > > > > To: [EMAIL PROTECTED]
> > > > > > > > > > Subject: connection pooling
> > > > > > > > > >
> > > > > > > > > > Hi all, I have gone over some of the tomcat docs
> > > > and googled errors
> > > > > > > > > > but there is SO much information covering JNDI
> > > > and Datasources... and
> > > > > > > > > > I'm hoping I don't have to be a JNDI/Datasource
> > > > and XML guru just to
> > > > > > > > > > set up db connections via connection pool.
> > > > > > > > > >
> > > > > > > > > > My situation is this...
> > > > > > > > > >
> > > > > > > > > > System:
> > > > > > > > > > Tomcat 5 on Fedora Core 2 connecting to a db on
> > > > an Informix Dynamic
> > > > > > > > > > Server 9.4 on Windows Server
> > > > > > > > > >
> > > > > > > > > > -I am able to connect to my db via typical JDBC
> > > > > > > > > > DriverManager.getConnection(). -This leads me to
> > > > believe that my jdbc
> > > > > > > > > > driver is in the correct place ...CATALINA
> > > > > > > > > >
> > > > > > > > > >
> > > >
> > ---------------------------------------------------------------------
> > > > > > > > > > To unsubscribe, e-mail:
> > > > [EMAIL PROTECTED]
> > > > > > > > > > For additional commands, e-mail:
> > > > [EMAIL PROTECTED]
> > > > > > > > > >
> > > > > > > > > >
> > > > > > > > > > ReplyForwardInvite Phillip to Gmail
> > > > > > > > > > Send Save Draft Discard Check spelling
> > > > > > > > > > To:
> > > > > > > > > > Cc:
> > > > > > > > > > Bcc:
> > > > > > > > > >
> > > > > > > > > > Add Cc | Add Bcc | Edit Subject | Attach a file
> > > > > > > > > > Subject:
> > > > > > > > > >
> > > > > > > > > > Attach a file
> > > > > > > > > >
> > > > > > > > > > Send Save Draft Discard Check spelling
> > > > > > > > > >
> > > > > > > > > > Atishay Kumar
> > > > > > > > > > <[EMAIL PROTECTED]> to Tomcat, me
> > > > > > > > > > More options 6:47am (6 hours ago)
> > > > > > > > > > On Wed, 6 Oct 2004 14:37:58 -0700, Eric Wulff
> > > > <[EMAIL PROTECTED]>
> > > > > > > > > > wrote:
> > > > > > > > > > > I have gone over some of the tomcat docs and
> > > > googled errors but
> > > > > > > > > > > there is SO much information covering JNDI,
> > > > connection pooling, and
> > > > > > > > > > > Datasources. Can someone review the info below
> > > > and consult or point
> > > > > > > > > > > me in the right direction? Although I feel I'm
> > > > missing something
> > > > > > > > > > > obvious, I can't find out what's wrong with
> > my set-up.
> > > > > > > > > > >
> > > > > > > > > > > thx
> > > > > > > > > > > Eric
> > > > > > > > > > >
> > > > > > > > > > > System:
> > > > > > > > > > > Tomcat 5 on Fedora Core 2 connecting to a db on
> > > > an Informix Dynamic
> > > > > > > > > > > Server 9.4 on Windows Server
> > > > > > > > > > >
> > > > > > > > > > > -I am able to connect to my db via typical JDBC
> > > > > > > > > > > DriverManager.getConnection(). This leads me
> > > > to believe that my
> > > > > > > > > > > informix jdbc driver is in the correct place...
> > > > > > > > > > > CATALINA_HOME/common/lib -I have a Context set
> > > > up in my server.xml
> > > > > > > > > > > per examples in a text tutorial I'm referencing
> > > > > > > > > > >
> > > > > > > > > > > Below listed...
> > > > > > > > > > > -errors
> > > > > > > > > > > -web.xml
> > > > > > > > > > > -server.xml <Context> (minus connection actual
> > > > values) -.java
> > > > > > > > > > >
> > > > > > > > > > > exception/errors:
> > > > > > > > > > > -Exception:
> > > > org.apache.commons.dbcp.SQLNestedException: Cannot
> > > > > > > > > > > create JDBC driver of class '' for connect URL
> > > > 'null' SQL state:
> > > > > > > > > > > null Error code: 0
> > > > > > > > > > >
> > > > > > > > > > > -stack trace reveals this, but I can't see why
> > > > since I have the
> > > > > > > > > > > driver in the correct directory...
> > > > > > > > > > > java.sql.SQLException: No suitable driver at
> > > > > > > > > > >
> > > > java.sql.DriverManager.getDriver(DriverManager.java:243) at
> > > > > > > > > > >
> > > >
> > org.apache.commons.dbcp.BasicDataSource.createDataSource(BasicDataSo
> > > > > > > > > > > ur
> > > > > > > > > > > ce.java:773)
> > > > > > > > > > >
> > > > > > > > > > > web.xml:
> > > > > > > > > > > <?xml version="1.0" encoding="ISO-8859-1"?>
> > > > > > > > > > > <!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>
> > > > > > > > > > > <servlet>
> > > > > > > > > > > <servlet-name>Test Connection
> > > > Pooling</servlet-name>
> > > > > > > > > > >
> > > > <servlet-class>TestConnectionPooling</servlet-class>
> > > > > > > > > > > </servlet>
> > > > > > > > > > >
> > > > > > > > > > > <servlet-mapping>
> > > > > > > > > > > <servlet-name>Test Connection
> > > > Pooling</servlet-name>
> > > > > > > > > > >
> > > > <url-pattern>/testConnectionPooling</url-pattern>
> > > > > > > > > > > </servlet-mapping>
> > > > > > > > > > >
> > > > > > > > > > > <resource-ref>
> > > > > > > > > > >
> > <res-ref-name>jdbc/test_connect</res-ref-name>
> > > > > > > > > > > <res-type>javax.sql.DataSource</res-type>
> > > > > > > > > > > <res-auth>Container</res-auth>
> > > > > > > > > > > </resource-ref>
> > > > > > > > > > > </web-app>
> > > > > > > > > > >
> > > > > > > > > > > server.xml <Context>:
> > > > > > > > > > > <Context path="/testConnectionPooling"
> > > > > > > > > > > docBase="testConnectionPooling" debug="0"
> > > > reloadable="true">
> > > > > > > > > >
> > > > > > > > > > <Resource name="jdbc/test_connection" auth="Container"
> > > > > > > > > > type="javax.sql.DataSource"/> is missing
> > > > > > > > > >
> > > > > > > > > > > <ResourceParams name="jdbc/test_connect">
> > > > > > > > > > > <parameter>
> > > > > > > > > > > <name>username</name>
> > > > > > > > > > > <value>informix</value>
> > > > > > > > > > > </parameter>
> > > > > > > > > > > <parameter>
> > > > > > > > > > > <name>password</name>
> > > > > > > > > > > <value>informix</value>
> > > > > > > > > > > </parameter>
> > > > > > > > > > > <parameter>
> > > > > > > > > > > <name>driverClassName</name>
> > > > > > > > > > > <value>com.informix.jdbc.IfxDriver</value>
> > > > > > > > > > > </parameter>
> > > > > > > > > > > <parameter>
> > > > > > > > > > > <name>url</name>
> > > > > > > > > > >
> > > > > > > > > >
> > > >
> > <value>jdbc:informix-sqli://url:port/dbName:INFORMIXSERVER=serverName<
> > > > > > > > > > /value
> > > > > > > > > > >
> > > > > > > > > > > </parameter>
> > > > > > > > > > > </ResourceParams>
> > > > > > > > > > > </Context>
> > > > > > > > > > >
> > > > > > > > > > > .java:
> > > > > > > > > > > import java.io.*;
> > > > > > > > > > > import java.sql.*;
> > > > > > > > > > > // -Must import javax.naming use JNDI which is
> > > > required to implement
> > > > > > > > > data
> > > > > > > > > > > // resource references and hence
> > connection pooling.
> > > > > > > > > > > import javax.naming.*;
> > > > > > > > > > > import javax.sql.*;
> > > > > > > > > > > import javax.servlet.*;
> > > > > > > > > > > import javax.servlet.http.*;
> > > > > > > > > > > import java.util.*;
> > > > > > > > > > >
> > > > > > > > > > > public class TestConnectionPooling extends
> > HttpServlet {
> > > > > > > > > > > private DataSource dataSource;
> > > > > > > > > > >
> > > > > > > > > > > public void init(ServletConfig config)
> > > > throws ServletException {
> > > > > > > > > > > try {
> > > > > > > > > > > Context init = new
> > > > InitialContext();
> > > > > > > > > > > // don't know what the
> > > > 'java:comp/env' refers to
> > > > > > > > > > > Context ctx = (Context)
> > > > > > > > > > init.lookup("java:comp/env");
> > > > > > > > > > > // I know
> > > > "jdbc/conversion must match the
> > > > > > > > > > > web.xml res-ref-name of the web.xml but don't
> > > > know what the path
> > > > > > > > > > > really
> > > > > > > > > > refers to
> > > > > > > > > > > dataSource = (DataSource)
> > > > > > > > > > ctx.lookup("jdbc/test_connect");
> > > > > > > > > > > } catch (NamingException ex) {
> > > > > > > > > > > throw new
> > > > ServletException("Cannot retrieve
> > > > > > > > > > > java:comp/env/jdbc/test_connect",ex);
> > > > > > > > > > > }
> > > > > > > > > > > }
> > > > > > > > > > >
> > > > > > > > > > > public void
> > doGet(HttpServletRequest request,
> > > > > > > > > > > HttpServletResponse
> > > > > > > > > > response)
> > > > > > > > > > > throws ServletException, IOException {
> > > > > > > > > > >
> > response.setContentType("text/html");
> > > > > > > > > > > PrintWriter out =
> > response.getWriter();
> > > > > > > > > > > Connection connection = null;
> > > > > > > > > > > out.println
> > > > ("<HTML><HEAD><TITLE>Test Connection
> > > > > > > > > > > Pooling</TITLE></HEAD><BODY>");
> > > > > > > > > > > out.println("<H1>Customer Name
> > > > Query</H1>");
> > > > > > > > > > >
> > > > > > > > > > > try {
> > > > > > > > > > > synchronized(dataSource) {
> > > > > > > > > > > connection =
> > > > dataSource.getConnection();
> > > > > > > > > > > }
> > > > > > > > > > > out.println("<br>");
> > > > > > > > > > >
> > > > out.println("<strong>Loaded informix driver
> > > > > > > > > > > successfully via server.xml.</strong>" +
> > > > > > > > > > >
> > > > "Now attempting db
> > > > > > > > > > connection.");
> > > > > > > > > > > out.println("<br>");
> > > > > > > > > > > PreparedStatement pstmt =
> > > > > > > > > > > connection.prepareStatement("SELECT blah FROM
> > > > blah blah");
> > > > > > > > > > > ResultSet results =
> > > > pstmt.executeQuery();
> > > > > > > > > > > if (!results.next()) {
> > > > > > > > > > > throw new
> > > > SQLException("No data
> > > > > > > > > > > returned
> > > > > > > > > > for some reason");
> > > > > > > > > > > }
> > > > > > > > > > > out.println("<br>");
> > > > > > > > > > > while(results.next()) {
> > > > > > > > > > >
> > out.println("<tr><td>" +
> > > > > > > > > > results.getString("blah") + "</td></tr>");
> > > > > > > > > > > }
> > > > > > > > > > > } catch (Exception ex) {
> > > > > > > > > > > out.println("<br>");
> > > > > > > > > > >
> > out.println("Exception: " + ex);
> > > > > > > > > > > if(ex instanceof
> > SQLException) {
> > > > > > > > > > > SQLException
> > > > sqlex = (SQLException) ex;
> > > > > > > > > > > out.println("<br>");
> > > > > > > > > > >
> > out.println("SQL state:
> > > > > > > > > > "+sqlex.getSQLState()+"<BR>");
> > > > > > > > > > > out.println("<br>");
> > > > > > > > > > >
> > out.println("Error code:
> > > > > > > > > > "+sqlex.getErrorCode()+"<BR>");
> > > > > > > > > > >
> > out.println("<br><br>");
> > > > > > > > > > >
> > > > sqlex.printStackTrace(out);
> > > > > > > > > > >
> > out.println("<br><br>");
> > > > > > > > > > > }
> > > > > > > > > > > }
> > > > > > > > > > > finally {
> > > > > > > > > > > try { connection.close(); } catch
> > > > (Exception ex) {}
> > > > > > > > > > > }
> > > > > > > > > > > out.println ("</BODY></HTML>");
> > > > > > > > > > >
> > > > > > > > > > >
> > > > > > > > > > > }
> > > > > > > > > > > }
> > > > > > > > > >
> > > > > > > > > > On Thu, 7 Oct 2004 09:29:09 -0400, Phillip Qin
> > > > > > > > > > <[EMAIL PROTECTED]>
> > > > > > > > > > wrote:
> > > > > > > > > > > Detail, detail, detail.
> > > > > > > > > > >
> > > > > > > > > > > 1. your context.xml
> > > > > > > > > > > 2. your web.xml
> > > > > > > > > > > 3. how do you obtain connection from pool, java
> > > > code pls. 4. can you
> > > > > > > > > > > connect using pool 5. commons-pool version
> > > > > > > > > > >
> > > > > > > > > > > Etc. etc.
> > > > > > > > > > >
> > > > > > > > > > > You need to provide details otherwise we can't help.
> > > > > > > > > > >
> > > > > > > > > > >
> > > > > > > > > > >
> > > > > > > > > > > -----Original Message-----
> > > > > > > > > > > From: Eric Wulff [mailto:[EMAIL PROTECTED]
> > > > > > > > > > > Sent: October 6, 2004 5:09 PM
> > > > > > > > > > > To: [EMAIL PROTECTED]
> > > > > > > > > > > Subject: connection pooling
> > > > > > > > > > >
> > > > > > > > > > > Hi all, I have gone over some of the tomcat
> > > > docs and googled errors
> > > > > > > > > > > but there is SO much information covering JNDI
> > > > and Datasources...
> > > > > > > > > > > and I'm hoping I don't have to be a
> > > > JNDI/Datasource and XML guru
> > > > > > > > > > > just to set up db connections via connection pool.
> > > > > > > > > > >
> > > > > > > > > > > My situation is this...
> > > > > > > > > > >
> > > > > > > > > > > System:
> > > > > > > > > > > Tomcat 5 on Fedora Core 2 connecting to a db on
> > > > an Informix Dynamic
> > > > > > > > > > > Server 9.4 on Windows Server
> > > > > > > > > > >
> > > > > > > > > > > -I am able to connect to my db via typical JDBC
> > > > > > > > > > > DriverManager.getConnection(). -This leads me
> > > > to believe that my
> > > > > > > > > > > jdbc driver is in the correct place ...CATALINA
> > > > > > > > > > >
> > > > > > > > > > >
> > > >
> > --------------------------------------------------------------------
> > > > > > > > > > > -
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> > > > > > >
> > > > > > > --
> > > > > > >
> > > > > > >
> > > > > > > :)
> > > > > > > Atishay Kumar
> > > > > > > Btech, SEM VII
> > > > > > > DA-IICT
> > > > > > > Gandhinagar - 382009
> > > > > > > India
> > > > > > > ph: +91 9825383948
> > > > > > >
> > > > /*************************************************************
> > > > ***************
> > > > > > > * Learn the rules as you would need them to break them
> > > > properly *
> > > > > > >
> > > > **************************************************************
> > > > **************/
> > > > > > >
> > > > > >
> > > > >
> > > > >
> > > > > --
> > > > > :)
> > > > > Atishay Kumar
> > > > > Btech, SEM VII
> > > > > DA-IICT
> > > > > Gandhinagar - 382009
> > > > > India
> > > > > ph: +91 9825383948
> > > > >
> > > > /*************************************************************
> > > > ***************
> > > > > * Learn the rules as you would need them to break them
> > properly *
> > > > >
> > > > **************************************************************
> > > > **************/
> > > > >
> > > > >
> > > >
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