Here is the native datastore query for your problem if you want to try it
out:
DatastoreService ds = DatastoreServiceFactory.getDatastoreService();
Query query = new Query(Member.class.getSimpleName());
query.setFilter(new FilterPredicate("name", FilterOperator.EQUAL,
nameParam));
List<Entity> list =
ds.prepare(query).asList(FetchOptions.Builder.withDefaults());
In my opinion, if you are building a new application right now, you should
consider other options on accessing the Datastore, such as Objectify
<https://code.google.com/p/objectify-appengine/> or even the raw Datastore
API. JDO is pretty heavyweight for the App Engine model.
On Sunday, December 7, 2014 7:12:47 AM UTC-2, ajg...@gmail.com wrote:
>
>
> Hello,
>
> I am using eclipse+google plugin to develop a simple API with Cloud
> Endpoints. I just have a member entity with JDO annotations, and I
> generated the Endpoint class.
>
>
> My Member entity only has 2 fields: the Long id and String name.
> I would like to use a getMemberByName(String name) method to retrieve
> easily a member instead of having to know its id.
>
> So I added this method to the Endpoint class generated:
>
>
> @SuppressWarnings({“unchecked”})
>
>
>
> @ApiMethod(name = “getMemberByName”,path=”/member/byname/{name}”)
>
> public List getMemberByName(@Named(“name”) String name) {
>
> PersistenceManager mgr = getPersistenceManager();
>
> List candidates = null;
>
> Query q=mgr.newQuery(Member.class);
>
> q.setFilter(“name == nameParam”);
>
> q.declareParameters(“String nameParam”);
>
> try {
>
> candidates = (List) q.execute(nom);
>
> } finally {
>
> mgr.close();
>
> }
>
> return candidates;
>
> }
>
>
> When I call this API method and give it a name parameter (which does exist
> in my datastore) it sends me nothing back but a 404 error.
>
> I thought maybe you could tell me if my code got any error, I’m not an
> expert with JDO.
>
>
> Thank you.
>
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