Spring dependency injection depending on request object -

i working on web application spring. application configured properties file. there multiple instances of application in different servers, each instance has different configuration file (each instance customized different customer) using controllers , services. this:

public class controller1 {     @autowired     service1 service1;      @requestmapping(value = "/page.htm", method = { requestmethod.get, requestmethod.post })     public modelandview serve(httpservletrequest request, httpservletresponse response) {         service1.dosomething();         return new modelandview("/something");     } }  @service public class service1 {     @autowired     service2 service2;     public void dosomething () {             …             service2.doanotherthing();             …         } }  @service public class service2 {     @value("${propertyvalue}")     private string propertyvalue;      //doanotherthing()  use propertyvalue     public void doanotherthing () {         …         //do propertyvalue         …         } } 

now have new requirement. there won’t multiple instances each customer, 1 instance multiple domains customers. application must decide configuration depending on host name of request object in controller. if customer points browser www.app1.com have use configuration file 1 if customer uses www.app2.com have use configuration 2 , on.

i moved configuration files database, realized not know how make dependency injection. services linked, service1 uses service2 , service2 1 must use value depends on configuration. service 2 has no knowledge of request object.

is there clean way solve this?

thanks,

one approach create configuration object customer singleton on spring config:

<bean id="customeraconfig"../> <bean id="customerbconfig"../> <bean id="customercconfig"../> 

and have session scoped configurationservice acts pointer configuartion active

public class configurationservice {     private customerconfig activeconfig;     // getters & setters.. } 

configure singleton proxy service on spring config can injected singleton components. need have cglib in classpath spring create proxy:

<bean class="com.mycompany.configurationservice" scope="session">   <aop:scoped-proxy/> </bean> 

and on login controller, select configuration should used virtual host name , store configurationservice later retrieval (remember configurationservice session scoped)

public class logincontroller {    @autowired private customerconfig[] custconfigs;   @autowired private configurationservice configservice;    @requestmapping(method = post)   public string login(httpservletrequest request, ..) {     ...     string host = request.getservername();     customerconfig activeconfig = // decide 1 based on host..     configservice.setactiveconfig(activeconfig);     ...   } } 

below sample foocontroller reads customer specific configuration

@controller @requestmapping("/foo") public class foocontroller {    @autowired private configurationservice configservice;    @requestmapping(method = "get")   public string get() {     ...     customerconfig config = configservice.getactiveconfig();     ...   }    ... } 

if program not have single entry point login page, can code similar logic filter. check if active configuration set on session, if not based on host name