I'm new to the jndi part of J2EE and to tomcat. I have my app almost
working in tomcat, but it needs to use Oracle. I have a sample
servlet that connects to the Oracle database just fine, but only if I
connect directly to the tomcat server's http connector.
If I hit the servlet (below) throught apache, the DataSource returned
is null. But no exception is thrown by javax.naming* calls. I have
played endlessly with my server.xml to get the oracle resource, and my
latest one is included below.
My main question is, how do I configure this to use Oracle using
mod_webapp? I would also like to know if it is possible to configure
tomcat so that I can use it through apache AND directly through the
http connector.
Thanks in advance,
Barry Roberts
<!-- Example Server Configuration File -->
<!-- Note that component elements are nested corresponding to their
parent-child relationships with each other -->
<!-- A "Server" is a singleton element that represents the entire JVM,
which may contain one or more "Service" instances. The Server
listens for a shutdown command on the indicated port.
Note: A "Server" is not itself a "Container", so you may not
define subcomponents such as "Valves" or "Loggers" at this level.
-->
<Server port="8005" shutdown="SHUTDOWN" debug="0">
<!-- A "Service" is a collection of one or more "Connectors" that share
a single "Container" (and therefore the web applications visible
within that Container). Normally, that Container is an "Engine",
but this is not required.
Note: A "Service" is not itself a "Container", so you may not
define subcomponents such as "Valves" or "Loggers" at this level.
-->
<!-- Define the Tomcat Stand-Alone Service -->
<Service name="Tomcat-Standalone">
<!-- A "Connector" represents an endpoint by which requests are received
and responses are returned. Each Connector passes requests on to the
associated "Container" (normally an Engine) for processing.
By default, a non-SSL HTTP/1.1 Connector is established on port 8180.
You can also enable an SSL HTTP/1.1 Connector on port 8543 by
following the instructions below and uncommenting the second Connector
entry. SSL support requires the following steps (see the SSL Config
HOWTO in the Tomcat 4.0 documentation bundle for more detailed
instructions):
* Download and install JSSE 1.0.2 or later, and put the JAR files
into "$JAVA_HOME/jre/lib/ext".
* Execute:
%JAVA_HOME%\bin\keytool -genkey -alias tomcat -keyalg RSA (Windows)
$JAVA_HOME/bin/keytool -genkey -alias tomcat -keyalg RSA (Unix)
with a password value of "changeit" for both the certificate and
the keystore itself.
By default, DNS lookups are enabled when a web application calls
request.getRemoteHost(). This can have an adverse impact on
performance, so you can disable it by setting the
"enableLookups" attribute to "false". When DNS lookups are disabled,
request.getRemoteHost() will return the String version of the
IP address of the remote client.
-->
<!-- Define a non-SSL1 HTTP/1.1 Connector on port 8180 -->
<Connector className="org.apache.catalina.connector.http.HttpConnector"
port="8180" minProcessors="5" maxProcessors="75"
enableLookups="false" redirectPort="8543"
acceptCount="10" debug="0" connectionTimeout="60000"/>
<!-- Note : To disable connection timeouts, set connectionTimeout value
to -1 -->
<!-- Define an SSL HTTP/1.1 Connector on port 8543 -->
<!--
<Connector className="org.apache.catalina.connector.http.HttpConnector"
port="8543" minProcessors="5" maxProcessors="75"
enableLookups="false"
acceptCount="10" debug="0" scheme="https" secure="true">
<Factory className="org.apache.catalina.net.SSLServerSocketFactory"
clientAuth="false" protocol="TLS"/>
</Connector>
-->
<!-- Define an AJP 1.3 Connector on port 8109 -->
<Connector className="org.apache.ajp.tomcat4.Ajp13Connector"
port="8109" minProcessors="5" maxProcessors="75"
acceptCount="10" debug="0"/>
<!-- Define a Proxied HTTP/1.1 Connector on port 8181 -->
<!-- See proxy documentation for more information about using this. -->
<!--
<Connector className="org.apache.catalina.connector.http.HttpConnector"
port="8181" minProcessors="5" maxProcessors="75"
enableLookups="true"
acceptCount="10" debug="0" connectionTimeout="60000"
proxyPort="80"/>
-->
<!-- Define a non-SSL HTTP/1.0 Test Connector on port 8182 -->
<!--
<Connector className="org.apache.catalina.connector.http10.HttpConnector"
port="8182" minProcessors="5" maxProcessors="75"
enableLookups="true" redirectPort="8543"
acceptCount="10" debug="0"/>
-->
<!-- An Engine represents the entry point (within Catalina) that processes
every request. The Engine implementation for Tomcat stand alone
analyzes the HTTP headers included with the request, and passes them
on to the appropriate Host (virtual host). -->
<!-- Define the top level container in our container hierarchy -->
<Engine name="Standalone" defaultHost="localhost" debug="0">
<!-- The request dumper valve dumps useful debugging information about
the request headers and cookies that were received, and the response
headers and cookies that were sent, for all requests received by
this instance of Tomcat. If you care only about requests to a
particular virtual host, or a particular application, nest this
element inside the corresponding <Host> or <Context> entry instead.
For a similar mechanism that is portable to all Servlet 2.3
containers, check out the "RequestDumperFilter" Filter in the
example application (the source for this filter may be found in
"$CATALINA_HOME/webapps/examples/WEB-INF/classes/filters").
Request dumping is disabled by default. Uncomment the following
element to enable it. -->
<!--
<Valve className="org.apache.catalina.valves.RequestDumperValve"/>
-->
<!-- Global logger unless overridden at lower levels -->
<Logger className="org.apache.catalina.logger.FileLogger"
prefix="catalina_log." suffix=".txt"
timestamp="true"/>
<!-- Because this Realm is here, an instance will be shared globally -->
<Realm className="org.apache.catalina.realm.MemoryRealm" />
<!-- Replace the above Realm with one of the following to get a Realm
stored in a database and accessed via JDBC -->
<!--
<Realm className="org.apache.catalina.realm.JDBCRealm" debug="99"
driverName="org.gjt.mm.mysql.Driver"
connectionURL="jdbc:mysql://localhost/authority?user=test;password=test"
userTable="users" userNameCol="user_name" userCredCol="user_pass"
userRoleTable="user_roles" roleNameCol="role_name" />
-->
<!--
<Realm className="org.apache.catalina.realm.JDBCRealm" debug="99"
driverName="oracle.jdbc.driver.OracleDriver"
connectionURL="jdbc:oracle:thin:@ntserver:1521:ORCL?user=scott;password=tiger"
userTable="users" userNameCol="user_name" userCredCol="user_pass"
userRoleTable="user_roles" roleNameCol="role_name" />
-->
<!--
<Realm className="org.apache.catalina.realm.JDBCRealm" debug="99"
driverName="sun.jdbc.odbc.JdbcOdbcDriver"
connectionURL="jdbc:odbc:CATALINA"
userTable="users" userNameCol="user_name" userCredCol="user_pass"
userRoleTable="user_roles" roleNameCol="role_name" />
-->
<!-- Define the default virtual host -->
<Host name="localhost" debug="0" appBase="webapps" unpackWARs="true">
<!-- Normally, users must authenticate themselves to each web app
individually. Uncomment the following entry if you would like
a user to be authenticated the first time they encounter a
resource protected by a security constraint, and then have that
user identity maintained across *all* web applications contained
in this virtual host. -->
<!--
<Valve className="org.apache.catalina.authenticator.SingleSignOn"
debug="0"/>
-->
<!-- Access log processes all requests for this virtual host. By
default, log files are created in the "logs" directory relative to
$CATALINA_HOME. If you wish, you can specify a different
directory with the "directory" attribute. Specify either a relative
(to $CATALINA_HOME) or absolute path to the desired directory.
-->
<Valve className="org.apache.catalina.valves.AccessLogValve"
directory="logs" prefix="localhost_access_log." suffix=".txt"
pattern="common"/>
<!-- Logger shared by all Contexts related to this virtual host. By
default (when using FileLogger), log files are created in the "logs"
directory relative to $CATALINA_HOME. If you wish, you can specify
a different directory with the "directory" attribute. Specify either a
relative (to $CATALINA_HOME) or absolute path to the desired
directory.-->
<Logger className="org.apache.catalina.logger.FileLogger"
directory="logs" prefix="localhost_log." suffix=".txt"
timestamp="true"/>
<!-- Define properties for each web application. This is only needed
if you want to set non-default properties, or have web application
document roots in places other than the virtual host's appBase
directory. -->
<!-- Tomcat Root Context -->
<!--
<Context path="" docBase="ROOT" debug="0"/>
-->
<!-- Tomcat Manager Context -->
<Context path="/manager" docBase="manager"
debug="0" privileged="true"/>
<!-- Tomcat Examples Context -->
<Context path="/examples" docBase="examples" debug="0"
reloadable="true">
<Logger className="org.apache.catalina.logger.FileLogger"
prefix="localhost_examples_log." suffix=".txt"
timestamp="true"/>
</Context>
</Host>
</Engine>
</Service>
<!-- The MOD_WEBAPP connector is used to connect Apache 1.3 with Tomcat 4.0
as its servlet container. Please read the README.txt file coming with
the WebApp Module distribution on how to build it.
(Or check out the "jakarta-tomcat-connectors/webapp" CVS repository)
To configure the Apache side, you must ensure that you have the
"ServerName" and "Port" directives defined in "httpd.conf". Then,
lines like these to the bottom of your "httpd.conf" file:
LoadModule webapp_module libexec/mod_webapp.so
WebAppConnection warpConnection warp localhost:8008
WebAppDeploy examples warpConnection /examples/
The next time you restart Apache (after restarting Tomcat, if needed)
the connection will be established, and all applications you make
visible via "WebAppDeploy" directives can be accessed through Apache.
-->
<!-- Define an Apache-Connector 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"/>
<!-- Replace "localhost" with what your Apache "ServerName" is set to -->
<Engine className="org.apache.catalina.connector.warp.WarpEngine"
name="tmprepo" debug="0" appBase="webapps">
<!-- Global logger unless overridden at lower levels -->
<Logger className="org.apache.catalina.logger.FileLogger"
prefix="apache_log." suffix=".txt"
timestamp="true"/>
<!-- Because this Realm is here, an instance will be shared globally -->
<Realm className="org.apache.catalina.realm.MemoryRealm" />
<!-- Define the default virtual host -->
<Host name="localhost" debug="0" appBase="webapps" unpackWARs="true">
<!-- ILXCT Context -->
<Context path="/ilxct" docBase="ilxct" debug="0"
reloadable="true">
<Logger className="org.apache.catalina.logger.FileLogger"
prefix="localhost_ilxct_log." suffix=".log"
timestamp="true"/>
<Resource name="Oracle" auth="Container"
type="javax.sql.DataSource"/>
<ResourceParams name="Oracle">
<parameter>
<name>user</name>
<value>*****</value>
</parameter>
<parameter>
<name>password</name>
<value>*****</value>
</parameter>
<parameter>
<name>driverClassName</name>
<value>oracle.jdbc.driver.OracleDriver</value>
</parameter>
<parameter>
<name>driverName</name>
<value>jdbc:oracle:thin:@192.168.2.60:1521:mhsdev1</value>
</parameter>
</ResourceParams>
<Resource name="XnOracle" auth="Container"
type="javax.sql.DataSource"/>
<ResourceParams name="XnOracle">
<parameter>
<name>user</name>
<value>*****</value>
</parameter>
<parameter>
<name>xactnet</name>
<value>*****</value>
</parameter>
<parameter>
<name>driverClassName</name>
<value>oracle.jdbc.driver.OracleDriver</value>
</parameter>
<parameter>
<name>driverName</name>
<value>jdbc:oracle:thin:@10.168.1.199:1521:xnt1</value>
</parameter>
</ResourceParams>
</Context>
</Host>
</Engine>
</Service>
</Server>
/* Modified from HelloWorldExample
*
*/
import java.io.*;
import java.text.*;
import java.util.*;
import javax.naming.*;
import javax.servlet.*;
import javax.servlet.http.*;
import javax.sql.DataSource;
import java.sql.*;
public class TestOracle extends HttpServlet {
public void doGet(HttpServletRequest request,
HttpServletResponse response)
throws IOException, ServletException
{
response.setContentType("text/html");
PrintWriter out = response.getWriter();
out.println("<html>");
out.println("<head>");
out.println("<title>Test Oracle Connection</title>");
out.println("</head>");
out.println("<body bgcolor=\"white\">");
out.println("<body>");
// note that all links are created to be relative. this
// ensures that we can move the web application that this
// servlet belongs to to a different place in the url
// tree and not have any harmful side effects.
// XXX
// making these absolute till we work out the
// addition of a PathInfo issue
try
{
InitialContext ic = new InitialContext();
if (ic == null) {
out.println("<h1>ic == null</h1>");
}
DataSource ds = (DataSource)ic.lookup("java:comp/env/Oracle");
if (ds == null) {
out.println("<h1>ds == null</h1>");
}
Connection conn = ds.getConnection();
if (conn == null) {
out.println("<h1>conn == null</h1>");
}
Statement stmt = conn.createStatement();
ResultSet rset = stmt.executeQuery("select * from configuration");
out.println("<table>");
while (rset.next())
{
out.println("<tr><td>" + rset.getString(1) + "</td><td>" +
rset.getString(2)+"</td></tr>");
}
out.println("</table>");
rset.close();
stmt.close();
conn.close();
}
catch (Exception ex)
{
out.println("<pre>");
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
PrintStream exOut = new PrintStream(bytes);
System.setErr(exOut);
ex.printStackTrace();
out.println(bytes.toString());
exOut.close();
out.println("</pre>");
}
out.println("<a href=\"/examples/servlets/index.html\">");
out.println("<img src=\"/examples/images/return.gif\" height=24 " +
"width=24 align=right border=0 alt=\"return\"></a>");
out.println("</body>");
out.println("</html>");
}
}
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