Override the OncePerRequestFilter isEnabled

[abarquin <ab...@gmail.com>]

Hello! I am new to shiro and I am trying to implement an override for
isEnabled() following the information in:
http://shiro.apache.org/web.html#Web-RequestspecificEnabling%252FDisabling.

I couldn't find a sample but I added:


package com.mycompany.shiro.web.servlet;

import org.apache.shiro.web.servlet.NameableFilter;


public abstract class OncePerRequestFilter extends NameableFilter {
    
    private boolean enabled = true; //most filters wish to execute when
configured, so default to true
    
    public boolean isEnabled() {
        if (<condition>))
            enabled = false;
        return enabled;
    }
}

I updated web.xml with the following entry:

    <filter>
        <filter-name>OncePerRequestFilter</filter-name>

<filter-class>com.mycompany.shiro.web.servlet.OncePerRequestFilter</filter-class>
    </filter>
    <filter-mapping>
        <filter-name>OncePerRequestFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>


When I try to run it, I get:
Oct 20, 2014 5:40:47 PM org.apache.catalina.core.StandardContext filterStart
SEVERE: Exception starting filter OncePerRequestFilter
java.lang.InstantiationException
	at
sun.reflect.InstantiationExceptionConstructorAccessorImpl.newInstance(InstantiationExceptionConstructorAccessorImpl.java:48)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:525)
	at java.lang.Class.newInstance0(Class.java:374)
	at java.lang.Class.newInstance(Class.java:327)

Any help is going to be appreciated. :)
Thanks!
 



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