Add correlation id on log4j's ThreadContext

CorrelationIdFilter.java

public class CorrelationIdFilter implements Filter {
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {

    }

    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
        String correlationId = ((HttpServletRequest) request).getHeader("x-correlation-id");
        ThreadContext.put("correlationId", correlationId);
        try {
            chain.doFilter(request, response);
        } finally {
            ThreadContext.clearAll();
        }
    }

    @Override
    public void destroy() {

    }
}