google app engine - Memcache not saving entity list on Java AppEngine -

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i want save list of entity kind memcache. entity using objectify annotation. save list memcache do

memcacheservice synccache = memcacheservicefactory.getmemcacheservice("food"); synccache.seterrorhandler(errorhandlers.getconsistentlogandcontinue(level.info)); synccache.put("foods",foodlist);//foodlist = arraylist of objectify entity synccache.put("timesaved",new datetime());

i keep getting error saying entity not serializable

java.io.notserializableexception:'com.company.data.food'

any ideas how might work? foodlist result of query. want save result of query memcache.


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