Securing Multiple Resources in OAuth2 Resource Server using Spring Security

In my previous blog post I demonstrate how to setup an OAuth2 authorization server using Spring Security. In this post, I will demonstrate how to setup the security configurations in a resource server to secure multiple resources.

The example here uses Spring Boot 1.2.7 and is a standalone OAuth2 resource server which secures multiple resources with their own ids and access rules. To do that, instead of using @EnableResourceServer, we have to define a ResourceServerConfiguration bean for each resource to be secured as shown below

public class OAuth2ServerConfig {
     protected ResourceServerConfiguration stockesources() {
          ResourceServerConfiguration resource = new ResourceServerConfiguration(){
                // Switch off the Spring Boot @Autowired configurers
                public void setConfigurers(List<ResourceServerConfigurer> configurers) {
                public int getOrder() {
                     return 30;
           resource.setConfigurers(Arrays.<ResourceServerConfigurer> asList(new ResourceServerConfigurerAdapter() {
                 public void configure(ResourceServerSecurityConfigurer resources) throws Exception {
                  public void configure(HttpSecurity http) throws Exception {
            return resource;

To secure the resource “stock”, we first implements a bean of ResourceServerConfiguration by manually setting the configurers by calling the super.setConfigurers() method and then set the order by overriding the getOrder() method. Then, security configuration for the resource can then be set up by using the return ResourceServerConfiguration object (variable resource) by implementing an anonymous ResourceSourceServerConfigurerAdapter.

To secure another resource, just define another bean of ResourceServerConfiguration similar to the above with a different resource id and its own OAuth2 access rules. Also, the order value has to be unique.

Note that I have to override the getOrder() method in the ResourceServerConfiguration here instead of line like

     ResourceServerConfiguration resource = ...

or spring security will throw exception like below

Caused by: java.lang.IllegalStateException: @Order on WebSecurityConfigurers must be unique. Order of 2147483626 was already used, so it cannot be used on . OAuth2ServerConfig$1@1a40489f too.


About Raymond Lee
Professional Java/EE Developer, software development technology enthusiast.

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