java - Spring Boot @CachePut value is null -

i have map stores simple pojos, key id field of pojo. spring's @cacheput annotation, expected this:

jobmodel jm = new jobmodel(); cachemap.put(jm.getid(), jm); 

still, inserts null values cache every time. if disallow null values when configure cache, en exception saying null being inserted.

code:

@springbootapplication @enablescheduling @enableautoconfiguration @enablecaching public class application {      public static void main(string[] args) {         applicationcontext = springapplication.run(application.class, args);     } 

...

private guavacache jobcache() {     return new guavacache(cachenames.cache_job, cachebuilder.newbuilder()             .maximumsize(999999)             .build(),             false);// or true, still null values }    @bean(name = "cachemanager")     public cachemanager cachemanager() {         simplecachemanager simplecachemanager = new simplecachemanager();         simplecachemanager.setcaches(arrays.aslist(                 jobcache(),....         ));         return simplecachemanager;     } 

and dao class, implementing interface, annotations declared in dao's (the class implements interface, not in interface itself)

@cacheput(value = cachenames.cache_job,key = "jm.id")     @transactional     @override     public void insert(jobmodel jm) {...} 

i tried jm.id, jm.getid(), #a0.getid(). still, everytime , exception com.google.common.base.preconditions.checknotnull() (or simple null insert). placed breakpoint there , can see key expected (a guid, string), value null.

per spring docs @ http://docs.spring.io/spring/docs/current/javadoc-api/org/springframework/cache/annotation/cacheput.html

it causes method invoked , result stored in associated cache.

your insert method needs return value want cached.

could simple as:

@cacheput(value = cachenames.cache_job,key = "jm.id") @transactional @override public jobmodel insert(jobmodel jm) {   return jm; } 

though doesn't feel best way design interaction. may want @ moving annotation whatever method constructing jobmodel passed insert method or if jobmodel being read database, method saves jobmodel database may place well.