I'm wondering if there is any pattern or implementation that allows me to enable/disable all the controllers at once of a given spring boot application by using a simple boolean variable that was provided by another feature flags service.
I'm thinking of putting a conditional check in each of the controller paths but it's a really bad way of doing it.
Thanks in advance
You can define custom Filter and register that. Sample Filter code at.
public class RequestAllowDenyFilter implements Filter {
private boolean isAllowed = true;
public RequestAllowDenyFilter(boolean isAllowed) {
this.isAllowed = isAllowed;
}
@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
throws IOException, ServletException {
if (isAllowed) {
chain.doFilter(request, response);
} else {
((HttpServletResponse) response).setStatus(HttpStatus.SERVICE_UNAVAILABLE.value());
}
}
}
Then when you register filter you need to pass do you want to allow/deny request.
@Value("${request.enabled:true}")
private boolean isEnabled;
@Bean
public FilterRegistrationBean<RequestAllowDenyFilter> loggingFilter() {
FilterRegistrationBean<RequestAllowDenyFilter> registrationBean
= new FilterRegistrationBean<>();
registrationBean.setFilter(new RequestAllowDenyFilter(isEnabled));
registrationBean.addUrlPatterns("/**");
registrationBean.setOrder(0);
return registrationBean;
}
You need to define request.enabled in application.properties file. Either true/false based on what you want to do.
