Vermeidung von ThreadLocal-Speicherlecks in benutzerdefinierten Spring-Interceptoren

@Component
public class TenantContextInterceptor implements HandlerInterceptor {
    private static final ThreadLocal<String> TENANT_HOLDER = new ThreadLocal<>();
 
    public static String getCurrentTenant() {
        return TENANT_HOLDER.get();
    }
 
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) {
        String tenantId = request.getHeader("X-Tenant-ID");
        if (tenantId != null) {
            TENANT_HOLDER.set(tenantId);
        }
        return true;
    }
 
    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) {
        TENANT_HOLDER.remove();
    }
}