need help to get Realm information in Tomcat

Sat, 14 Jan 2006 09:40:11 -0800

Hi.
 
i have requirement to get Users in LDAP using the realm information give in my application xml file museadmin.xml ( i have attached this file)
 
i want to get JNDIRealm information , i will use real object to get information like getConnectionURL etc.
 
I have seen code give below published in site
 
Server server = ServerFactory.getServer();
//Note, this assumes the Container is "Catalina"
Service service = server.findService("Catalina");
Engine engine = (Engine) service.getContainer();
Host host = (Host) engine.findChild(engine.getDefaultHost());
//Note, this assumes your context is "myContext"
Context context = (Context) host.findChild("myContext");
Realm realm = context.getRealm();
I want to use this code in my servlet to get JNDIRealm information
i am not able to get the service object , i am getting the NullPointerException in line Service service = server.findService("Catalina");
 
i have observed that server object is not initialized properly , If i try to print the server.findServices().length it is printing as 0
 
please some one help me in resolving this problem,
 
my Servlet Class is below :
public class JNDIRealmServlet extends HttpServlet {
 
public void service(HttpServletRequest req,HttpServletResponse res) throws ServletException,IOException
{
JNDIRealm realm= (JNDIRealm)getJNDIRealm();
}
public JNDIRealm getJNDIRealm(){
JNDIRealm realm=null;
try
{
Server server = ServerFactory.getServer();
 
Service ser[]=server.findServices();
System.out.println("length = "+server.findServices().length);
for(int i=0;i< server.findServices().length;i++){
System.out.println("service[ "+i+"] = "+ser[i]);
}
//Note, this assumes the Container is "Catalina"
Service service = server.findService("Catalina");
Engine engine = (Engine) service.getContainer();
Host host = (Host) engine.findChild(engine.getDefaultHost());
//Note, this assumes your context is "myContext"
Context context = (Context) host.findChild("myContext");
realm = (JNDIRealm)context.getRealm();
}catch(Exception ex){
ex.printStackTrace();
}
return realm;
}
}
 
Thanks and Regards
Chandra,
SoftwareEngineer,
FlextronicsSoftwareSystems.

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<!--

    Context configuration file for the Tomcat Administration Web App

    $Id: admin.xml,v 1.3 2004/02/20 17:09:19 remm Exp $

-->


<myContext path="/museadmin" docBase="${catalina.home}/webapps/museadmin"
        debug="0" privileged="true">
    <!--<Realm className="org.apache.catalina.realm.JNDIRealm" 
    debug="99"
    connectionName="cn=manager,dc=alcatel,dc=com"
    connectionPassword="secret"
    connectionURL="ldap://localhost:389";
    roleBase="ou=roles,dc=alcatel,dc=com"
    roleName="cn"
    roleSearch="(uniqueMember={0})"
    roleSubtree="false"
    userSearch="(uid={0})"
    userPassword="userPassword"
    userPattern="uid={0},ou=people,dc=alcatel,dc=com"
    />-->

	 <Realm className="org.apache.catalina.realm.JNDIRealm" 
    debug="99"
    connectionName="cn=Manager, dc =alcatel, dc =com"
    connectionPassword="secret"
    connectionURL="ldap://10.203.201.178:666";
    roleBase="dc=alcatel,dc=com"
    roleName="cn"
    userSearch="((cn=*))"
 /> 

	<Resource name="ldap/museadmin" auth="Container"
            type="org.apache.catalina.realm.JNDIRealm" debug="99"
    connectionName="cn=manager,dc=alcatel,dc=com"
    connectionPassword="secret"
    connectionURL="ldap://10.203.201.178:666";
    roleBase="ou=roles,dc=alcatel,dc=com"
    roleName="cn"
    roleSearch="(uniqueMember={0})"
    roleSubtree="false"
    userSearch="(uid={0})"
    userPassword="userPassword"
    userPattern="uid={0},ou=people,dc=alcatel,dc=com"/>

    <Resource auth="Container" description="Oracle Datasource example" name="jdbc/museadmin" type="javax.sql.DataSource"/>
      <ResourceParams name="jdbc/museadmin">
        <parameter>
          <name>maxWait</name>
          <value>5000</value>
        </parameter>
        <parameter>
          <name>maxActive</name>
          <value>4</value>
        </parameter>
        <parameter>
          <name>password</name>
          <value>maatusr1</value>
        </parameter>
        <parameter>
          <name>url</name>
          <value>jdbc:oracle:thin:@10.203.201.180:1521:SNM</value>
        </parameter>
        <parameter>
          <name>driverClassName</name>
          <value>oracle.jdbc.driver.OracleDriver</value>
        </parameter>
        <parameter>
          <name>maxIdle</name>
          <value>2</value>
        </parameter>
        <parameter>
          <name>username</name>
          <value>maatusr1</value>
        </parameter>
  </ResourceParams>

  <!-- Uncomment this Valve to limit access to the Admin app to localhost
   for obvious security reasons. Allow may be a comma-separated list of
   hosts (or even regular expressions).
  <Valve className="org.apache.catalina.valves.RemoteAddrValve"
    allow="127.0.0.1"/>
  -->

 <Logger className="org.apache.catalina.logger.FileLogger"
             prefix="localhost_admin_log." suffix=".txt"
          timestamp="true"/> 

</myContext>



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