Adding more then one client to the Spring OAuth2 Auth Server

Do not use multiple inMemory builders, instead concatenate multiple withClients inside one inMemory:

@Overridepublic void configure(ClientDetailsServiceConfigurer clients) throws Exception {    clients.inMemory()                .withClient("first")                .secret("secret")                .scopes("read")                .authorizedGrantTypes("password")            .and()                .withClient("sec")                .secret("secret")                .scopes("read")                .authorizedGrantTypes("password");}

For inMemorybuilder with configuration (you will have to define your own configuration):

 @Override    public void configure ( ClientDetailsServiceConfigurer clients ) throws Exception {        // @formatter:off        InMemoryClientDetailsServiceBuilder inMemoryBuilder = clients.inMemory ();        for (String clientKey: authServerProperties.getClient ().keySet ()) {            OAuthClientProperties client = authServerProperties.getClient ().get ( clientKey );            inMemoryBuilder                .withClient ( client.getClientId () )                .secret ( client.getClientSecret () )                .scopes ( client.getScopes () == null ? new String[] {"openid"} : client.getScopes () )                .authorizedGrantTypes ( client.getAuthorizedGrandTypes () == null ? "client_credentials" : client.getAuthorizedGrandTypes () );        }        // @formatter:on    }

with two additional classes:

@ConfigurationProperties ( prefix = "my-authorization-server" )public class AuthServerProperties     private final Map<String, OAuthClientProperties> client = new HashMap<> ();    ...    public Map<String, OAuthClientProperties> getClient () {        return client;    }    ...}public class OAuthClientProperties {    private String clientId;    private String clientSecret;    private String[] scopes;    private String authorizedGrandTypes;    public String getClientId () {        return clientId;    }    public void setClientId ( String clientId ) {        this.clientId = clientId;    }    public String getClientSecret () {        return clientSecret;    }    public void setClientSecret ( String clientSecret ) {        this.clientSecret = clientSecret;    }    public String[] getScopes () {        return scopes;    }    public void setScopes ( String[]  scopes ) {        this.scopes = scopes;    }    public String getAuthorizedGrandTypes () {        return authorizedGrandTypes;    }    public void setAuthorizedGrandTypes ( String authorizedGrandTypes ) {        this.authorizedGrandTypes = authorizedGrandTypes;    }}

and finally, in properties you would have something like this:

my-authorization-server.client.foo.client-id=foo-clientmy-authorization-server.client.foo.client-secret=foo-client-supersecretmy-authorization-server.client.foo.scopes=readmy-authorization-server.client.bar.client-id=bar-clientmy-authorization-server.client.bar.client-secret=bar-client-verysupersecretmy-authorization-server.client.bar.scopes=read,write