java - Custom Key Generation in Spring Caching -

i have started working on spring caching.

this class in have implemented caching:

@cacheconfig(cachenames="empcache") public class general {        @cacheable     public string getdetails(int empid) {          if(empid==1) {             system.out.println("inside getdetails. emp id 1.");             return "amar";         } else {             system.out.println("emp id not 1.");             return "anthony";         }     } } 

this custom bean user key generation:

@component public class temp {      private string name;     private string surname;      public string getname() {         return name;     }      public void setname(string name) {         this.name = name;     }      public string getsurname() {         return surname;     }      public void setsurname(string surname) {         this.surname = surname;     }    } 

my context.xml

<context:component-scan base-package="com.packages.beans" /> <cache:annotation-driven key-generator="enhanceddefaultkeygenerator"/>  <bean id ="enhanceddefaultkeygenerator" class="com.packages.beans.mykeygenerator"/>  <bean id="cachemanager" class="org.springframework.cache.ehcache.ehcachecachemanager"                          p:cache-manager-ref="ehcache"/>  <bean id="ehcache" class="org.springframework.cache.ehcache.ehcachemanagerfactorybean"                         p:config-location="classpath:ehcache.xml" p:shared="true"/> 

below custom key generation class:

public class mykeygenerator implements keygenerator {      @autowired      private temp temp1;      @override     public object generate(object arg0, method arg1, object... arg2) {           string key =  temp1.getname() + temp1.getsurname() + "_" + arg1.getname();         system.out.println("key "+key);          return key;     }    } 

main method:

public static void main(string args[]) {     temp generate=new temp();     generate.setname("abc");     generate.setsurname("def");      applicationcontext context =  new   classpathxmlapplicationcontext("context.xml");     general main=(general) context.getbean("mybean");         system.out.println(main.getdetails(main.getempid())); } 

when running program main method setting the value of temp in it. getting key in keygenerator class null_null_getdetails , not abc_def_getdetails.

but need key composed of values prefill in custom bean temp.

the 'temp' creating in main not part of spring context. instead spring creates bean 'temp' from

@component public class temp 

but there name , surename null. instance of temp used keygenerator , that's why nulls in key.

you must create bean of temp set name , surname. in java config can :

@bean temp temp() {    temp generate=new temp();    generate.setname("abc");    generate.setsurname("def");    return temp;  }