DZone Snippets: tomcat code

Common keytool commands needed for living with Java

frost137 (Douglas Wyatt) — Mon, 14 Apr 2008 18:06:50 GMT



// generate a key -- make it long lived so we dont have to do this again

keytool -genkey -alias tomcat -keyalg RSA -validity 3650 -storepass changeit



// export cert to a file

keytool -export -rfc -v -file tomcatCert.crt -alias tomcat -storepass changeit

 

// look at the cert in the file

keytool -printcert -file tomcatCert.crt -storepass changeit





// delete pre-existing cert

keytool -delete -alias tomcat -keystore c:/apps/jdk/jre/lib/security/cacerts -storepass changeit



// import cert into a keystore

keytool -import -file tomcatCert.crt -trustcacerts -alias tomcat -keystore c:/apps/jdk/jre/lib/security/cacerts -storepass changeit



// look at the imported cert

keytool -list -alias tomcat -keystore c:/apps/jdk/jre/lib/security/cacerts -storepass changeit

Overriding Tomcat Valve to return extended login failure status

NicholasSushkin (Nicholas Sushkin) — Thu, 22 Mar 2007 22:25:21 GMT

See Shade Grown Code for more information.

ExtendedStatusSetter.java



package com.ofc.tomcat;



import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;



/**

 * Interface flagging that the implementing Realm can set request

 * headers providing additional information about an authentication

 * failure.

 *

 * @author Nicholas Sushkin

 */

public interface ExtendedStatusSetter

{



    /**

     * The request attribute under which we forward an extended failure status message

     * (as an object of type String) to a login error page.

     */

    public static String LOGIN_FAILURE_MESSAGE_ATTR = 

        "com.ofc.tomcat.LOGIN_FAILURE_MESSAGE";

    

    public void setExtendedStatus(String username, HttpServletRequest request, HttpServletResponse response);

}

ExtendedStatusFormAuthenticator.java



package com.ofc.tomcat;



import org.apache.catalina.authenticator.Constants;

import org.apache.catalina.authenticator.FormAuthenticator;

import org.apache.catalina.Realm;

import org.apache.catalina.connector.Request;

import org.apache.catalina.connector.Response;

import org.apache.catalina.deploy.LoginConfig;

import org.apache.commons.logging.Log;

import org.apache.commons.logging.LogFactory;

import javax.servlet.RequestDispatcher;



/**

 * Adds extended authentication failure status to tomcat FormAuthenticator.

 *

 * @author Nicholas Sushkin

 */

public class ExtendedStatusFormAuthenticator extends FormAuthenticator

{

    /**

     * Descriptive information about this implementation.

     */

    protected static final String info =

        "com.ofc.tomcat.ExtendedStatusFormAuthenticator/1.0";



    private static Log log = LogFactory.getLog(ExtendedStatusFormAuthenticator.class);



    // ------------------------------------------------------------- Properties

    /**

     * Return descriptive information about this Valve implementation.

     */

    @Override

    public String getInfo() 

    {

        return info;

    }



    // ------------------------------------------------------------- Overridden behavior

    /**

     * Called to forward to the error page

     * 

     * @param request Request we are processing

     * @param response Response we are creating

     * @param config    Login configuration describing how authentication

     *              should be performed

     */

    @Override

    protected void forwardToErrorPage(Request request, Response response, LoginConfig config) 

    {

        Realm realm = context.getRealm();



        if (realm instanceof ExtendedStatusSetter)

        {

            log.debug("realm implements ExtendedStatusSetter, setting extended status for error page");

            String username = request.getParameter(Constants.FORM_USERNAME);

            ((ExtendedStatusSetter) realm).setExtendedStatus(username, request.getRequest(), response.getResponse());

        }

        else

        {

            log.debug("realm does not implement ExtendedStatusSetter, NOT setting extended status for error page");

        }



        RequestDispatcher disp =

            context.getServletContext().getRequestDispatcher

            (config.getErrorPage());

        try {

            disp.forward(request.getRequest(), response.getResponse());

            response.finishResponse();

        } catch (Throwable t) {

            log.warn("Unexpected error forwarding to error page", t);

        }

    }

}

Realm implementation will include the following



public class AccountLockoutDatasourceRealm extends DataSourceRealm implements ExtendedStatusSetter

{

    // ...



    public void setExtendedStatus(String username, HttpServletRequest request, HttpServletResponse response)

    {

        setMessage(request, "Account locked");

    }



    protected void setMessage(HttpServletRequest request, String message)

    {

        request.setAttribute(ExtendedStatusSetter.LOGIN_FAILURE_MESSAGE_ATTR, message);

    }

}

Tomcat debug

Mickael (Mickael) — Wed, 06 Dec 2006 18:25:59 GMT

// description of your code here
Parametre de conf pour lancer un tomcat en debug afin de se connecter a distance sur le port 8000



Xdebug -Xrunjdwp:transport=dt_socket,adress=8000,server=y,suspend=n

Getting A Data Source From Tomcat

JohnMunsch (John Munsch) — Tue, 28 Feb 2006 04:13:48 GMT

// You can setup a data source in tomcat using a context file
// or you can set one up using the Administration web pages
// as well. Either way you do it, here is the simple code to
// get the data source from Tomcat so you can start pulling
// out database connections.



// Obtain our environment naming context

Context initCtx = new InitialContext();

Context envCtx = (Context) initCtx.lookup("java:comp/env");



// Look up our data source by the name we gave it when we created it. 

// In this case that's "jdbc/EmployeeDB".

DataSource ds = (DataSource) envCtx.lookup("jdbc/EmployeeDB");

StartupItem Script for Tomcat on OS X 10.3

santry (Sean Santry) — Thu, 06 Oct 2005 23:50:11 GMT



#!/bin/sh

        

##

# Start Tomcat

##



. /etc/rc.common



export JAVA_HOME=/Library/Java/Home

export CATALINA_HOME="/usr/local/tomcat"

export TOMCAT_HOME="/usr/local/tomcat"



StartService ()

{



	if [ "${TOMCAT:=-NO-}" = "-YES-" ]; then



	    ConsoleMessage "Starting Tomcat"

            sh ${TOMCAT_HOME}/bin/startup.sh

	fi



}



StopService()

{



	ConsoleMessage "Stopping Tomcat"

    sh ${TOMCAT_HOME}/bin/shutdown.sh

}



RestartService ()

{

    StopService

    StartService

}





RunService "$1"

Killing Tomcat on Linux

l00pek (l00pek) — Tue, 24 May 2005 23:59:24 GMT



#!/bin/sh



#args to pass to kill

ARG=$1



for file in `find /proc -regex /proc/[0-9]+ 2> /dev/null`; do



    # FIXME: this will execute the command but I don't think that grep 

    # if `grep org.apache.catalina.startup.Bootstrap $file/cmdline`; then 



    if `grep --silent org.apache.catalina.startup.Bootstrap $file/cmdline 2> /dev/null`; then 



        #get the localname of this process id.

        #cat $file/cmdline



        #now go ahead and kill this guy

        base=`basename $file`

        echo kill $ARG $base

        kill $ARG $base



    fi 



done