CachedRoute.java

// Let's assume we have a Spring environment
...
import javax.cache.CacheManager;
import my.company.utils.CachePolicy;

@Component
public class CachedRoute extends RouteBuilder{

    private static final Logger log = LoggerFactory.getLogger(CachedRoute.class);

    @Override
    public void configure() throws Exception {
      from("direct:cachedRoute")
        .policy(getUserDataCachePolicy())
        .setProperty("userData").method(userDataService.class,"lookupUserDataByName");
    }

    @Autowired
    CacheManager cacheManager;
    //Cache user data by user name. If user data is found in cache the rest of the route is not executed. 
    private Policy getUserDataCachePolicy(){
        CachePolicy cachePolicy = new CachePolicy();

        if (cacheManager!=null) {
            cachePolicy.setCache(cacheManager.getCache("userDataCache"));
        }

        //User name is the cache key
        cachePolicy.setKeyExpression(simple("${header.userName}"));

        //What to do the the cached object if found
        cachePolicy.setApplyCachedObject(new BiConsumer<Exchange, Object>() {
            public void accept(Exchange exchange, Object cached){
                exchange.setProperty("userData",cached);
            }
        });

        //Cache userData at the end of the route
        cachePolicy.setValueExpression(exchangeProperty("userData"));

        return cachePolicy;
    }