com.sentinel.config.StatelessAuthenticationFilter.java Source code

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Here is the source code for com.sentinel.config.StatelessAuthenticationFilter.java

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/**
 *  * Copyright (c) 2016 ;; 
 * All rights reserved. 
 * 
 *   Licensed under Beer License
 */
package com.sentinel.config;

import java.io.IOException;

import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;

import org.springframework.security.core.Authentication;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.web.filter.GenericFilterBean;

import com.google.common.base.Preconditions;

/**
 * @author Vipin Kumar
 * @created 16-Feb-2016
 * 
 * TODO: Write a quick description of what the class is supposed to do.
 * 
 */
public class StatelessAuthenticationFilter extends GenericFilterBean {

    private static final org.apache.log4j.Logger LOG = org.apache.log4j.Logger
            .getLogger(StatelessAuthenticationFilter.class);

    private final TokenAuthenticationService tokenAuthenticationService;

    /**
     * 
     */
    public StatelessAuthenticationFilter(TokenAuthenticationService tokenAuthenticationService) {
        this.tokenAuthenticationService = Preconditions.checkNotNull(tokenAuthenticationService);
    }

    /* (non-Javadoc)
     * @see javax.servlet.Filter#doFilter(javax.servlet.ServletRequest, javax.servlet.ServletResponse, javax.servlet.FilterChain)
     */
    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
            throws IOException, ServletException {
        LOG.trace("Method: doFilter called.");

        Authentication authentication = tokenAuthenticationService.getAuthentication((HttpServletRequest) request);
        SecurityContextHolder.getContext().setAuthentication(authentication);
        chain.doFilter(request, response);
        // SecurityContextHolder.getContext().setAuthentication( null );

        LOG.trace("Method: doFilter finished.");
    }
}