90.4. Ehcache 기반 멱등 리포지토리 예:
CacheManager manager = CacheManagerBuilder.newCacheManager(new XmlConfiguration("ehcache.xml"));
EhcacheIdempotentRepository repo = new EhcacheIdempotentRepository(manager, "idempotent-cache");
from("direct:in")
.idempotentConsumer(header("messageId"), idempotentRepo)
.to("mock:out");