spring - Overriding user injected by @CreatedBy Annotation in AuditorAware Implementation -

following implementation of auditaware.

@component public class auditorawareimpl implements auditoraware<string> {      @log     private logger logger;      @override     public string getcurrentauditor() {         string user = "system";         try {             final subject subject = securityutils.getsubject();             if (subject != null) {                 final session session = subject.getsession(false);                 if (session != null) {                     final user userobj = (user) session.getattribute("user");                     if (userobj != null) {                         user = userobj.getusername();                     }                 }             }         } catch (final exception e) {             this.logger.error("getcurrentauditor", "no logged in user information found.", e);         }          return user;     } } 

as know, value of user returned auditorawareimpl injected spring in attribute marked @createdby annotation below.

@createdby @column(name = "created_by", length = 150, nullable = false, updatable = false) private string createdby; 

there 2 problems want solve.

1. i triggering separate thread saves thousands of objects in database. if session times out in between, session object becomes null , auditawareimpl throws error , hence background process errors out.
2. i want run few quartz schedular related jobs in in session object not available. still want inject hard coded user in case. how do it?

one thing have tried @ individual object level, using following code is,

@transient private string overriddenuser;  @prepersist public void updatecreatedby(){     if(overriddenuser!=null){          this.createdby=overriddenuser;     } } 

i explicitly set overriddenuser="admin" whenever want override user injected spring in createdby , overwrite using prepersist method. not seem work since before overwrite value, spring tries populate created using value returned auditaware. if session expired process errors outs! how solve this?

i found solution above problems below.

step 1

i defined bean below contains hashmap. map store current thread name key , mapped username value.

public class overriddenuser { map<string,string> userthreadmap= new hashmap<>();  //add getters/setters } 

step 2

initialised bean on startup in class annoted @configuration.

@bean("overriddenuser") public overriddenuser overrideuser(){     overriddenuser obj = new overriddenuser();     return obj;     // singleton implementation can done if required  } 

step 3

auto wired bean in impl class want override session user.

@autowired overriddenuser overriddenuser; 

assigned random name running thread.

randomstring randomthreadname = new randomstring(9); thread.currentthread().setname(randomthreadname.tostring()); 

and put required user name current thread in hashmap below.

try {     if(overriddenuser!=null){     overriddenuser.getuserthreadmap().put(thread.currentthread().getname(),"my on ridden username");     }  // entire database related code here  } catch (exception e){   // handle exceptions thrown code  } {             //perform clean here             if(overriddenuser!=null){                 overriddenuser.getuserthreadmap().remove(thread.currentthread().getname());         }     } } 

step 4

then modified auditawareimpl below.

@component public class auditorawareimpl implements auditoraware<string> {      @log     private logger logger;      @autowired     overriddenuser overriddenuser;      @override     public string getcurrentauditor() {          string user = "system";         try {              if(overriddenuser!=null && overriddenuser.getuserthreadmap()!=null && overriddenuser.getuserthreadmap().get(thread.currentthread().getname())!=null){                 user=overriddenuser.getuserthreadmap().get(thread.currentthread().getname());             }else{                 final subject subject = securityutils.getsubject();                 if (subject != null) {                     final session session = subject.getsession(false);                     if (session != null) {                         final user userobj = (user) session.getattribute("user");                         if (userobj != null) {                             user = userobj.getusername();                         }                     }                 }             }         } catch (final exception e) {             this.logger.error("getcurrentauditor", "no logged in user information found.", e);         }          return user;     } } 

so if running thread accesses auditawareimpl gets custom user name set thread. if null pulls username session doing earlier. hope helps.