maven-tomcat-plugin tomcat-users.xml

Here you can define tomcat-users.xml as in a real tomcat container (archetypeArtifactId: maven-archetype-webapp):


src/main/tomcatconf/tomcat-users.xml


Tomcat Maven Plugin search for a directory "src/main/tomcatconf" and if it exists it is copied to the configuration of embedded instance. 

non-administrator user on windows 7 use emacs

Today I am trying to enable manager app of Tomcat 7 on Windows 7. According to tomcat document I need to add <user> to tomcat-users.xml to grant access. I use Emacs, edit tomcat-users.xml, then save, but whatever I set the username/password/roles, I cannot login due to 401 error.

After several hours attempting I suddenly realized that I am editing wrong file! After search and compare several version of this file. I found that this is what I am editing and saving:

C:\Users\Sean\AppData\Local\VirtualStore\Program Files\Apache Software Foundation\Tomcat 7.0\conf\tomcat-users.xml

Instead of the right place:

C:\Program Files\Apache Software Foundation\Tomcat 7.0\conf\tomcat-users.xml

What happened even if I open the file in emacs using the right path? This is from Microsoft answers:

To protect against some types of malware, Windows 7 doesn't allow users to store data in C:\Windows , C:\Program Files , or their subfolders.

To allow existing programs that access those locations to run, it automatically (and transparently) translates such access to the VirtualSore folder:

C:\Windows\... --> C:\Users\"Name"\AppData\Local\VirtualStore\Windows\...
C:\Program Files\... --> C:\Users\"Name"\AppData\Local\VirtualStore\Program Files\...

That’s it, restart emacs with administrator fix it.

<error-page> catch-all feature in servlet 3.0

 

Starting with Servlets 3.0, <error-code> and <exception-type> elements are optional. An <error-page> without any <exception-type> and <error-code> will be considered as the webapp's default error page, and will act as a "catch-all" for any error codes or exception types. It will be an error if a web.xml contains more than one such default error page.
There is a example here. We want to catch ArithmeticException and display /arithmeticError.jsp instead of default /errorPage.jsp, in servlet 3.0, this is the DD:

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/j2eehttp://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"
    version="2.4">
    <servlet>
        <servlet-name>JSTLSample</servlet-name>
        <servlet-class>web.JSTLServlet</servlet-class>
    </servlet>
    <servlet-mapping>
        <servlet-name>JSTLSample</servlet-name>
        <url-pattern>/JSTLSample.do</url-pattern>
    </servlet-mapping>
    <error-page>
        <location>/errorPage.jsp</location>
    </error-page>
    <error-page>
        <exception-type>java.lang.ArithmeticException</exception-type>
        <location>/arithmeticError.jsp</location>
    </error-page>
    <error-page>
        <error-code>404</error-code>
        <location>/notFoundError.jsp</location>
    </error-page>
</web-app>

In previous version, DD is like this:

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/j2eehttp://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"
    version="2.4">
    <servlet>
        <servlet-name>JSTLSample</servlet-name>
        <servlet-class>web.JSTLServlet</servlet-class>
    </servlet>
    <servlet-mapping>
        <servlet-name>JSTLSample</servlet-name>
        <url-pattern>/JSTLSample.do</url-pattern>
    </servlet-mapping>
    <error-page>
       <exception-type>java.lang.Throwable</exception-type>
       <location>/errorPage.jsp</location>
    </error-page>
    <error-page>
        <exception-type>java.lang.ArithmeticException</exception-type>
        <location>/arithmeticError.jsp</location>
    </error-page>
    <error-page>
        <error-code>404</error-code>
        <location>/notFoundError.jsp</location>
    </error-page>
</web-app>