I'm using the Java API. In my app, I store (only) the ISBN's of a
series of books. When I load the books, my service goes to Amazon and
retrieves the rest of the information about the book from their web
service. Then I display all the books on a page.
My service uses the JCache API, with a static attribute to represent
the cache. The (pseudo) code below is roughly analogous to what I
actually do:
public class AmazonBookService {
private static Cache cache;
static {
int secs = // expiration limit
cache = // get the factory, initialize the cache with expiration
limit
}
public Book[] getBooks() {
// use a DAO to get the ISBNs from the datastore -- happens
every request
// initialize results array
// for each ISBN:
// if book is in cache, add it to results
// if not, fetch data from Amazon, build book, and add it to
cache and the results
// }
// return all the books
}
}
When I deploy the service, it seems to work, but most of the time when
I refresh a web page it still take a long time.
My questions are:
1. Is this the right way to use the cache?
2. How can I check to see if it's working?
3. Is there a way I can send all the book requests to Amazon
simultaneously?
Thanks,
Ken Kousen
[email protected]
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