Examples with QueryHandle co.cask.cdap.proto.QueryHandle used on opensource projects

Example 36 with QueryHandle

use of co.cask.cdap.proto.QueryHandle in project cdap by caskdata.

the class ExploreQueryExecutorHttpHandler method getQueryResultPreview.

@POST
@Path("data/explore/queries/{id}/preview")
public void getQueryResultPreview(HttpRequest request, HttpResponder responder, @PathParam("id") String id) throws ExploreException {
    // NOTE: this call is a POST because it is not idempotent: cursor of results is moved
    try {
        final QueryHandle handle = QueryHandle.fromId(id);
        List<QueryResult> results;
        if (handle.equals(QueryHandle.NO_OP)) {
            results = Lists.newArrayList();
        } else {
            results = doAs(handle, new Callable<List<QueryResult>>() {

                @Override
                public List<QueryResult> call() throws Exception {
                    return exploreService.previewResults(handle);
                }
            });
        }
        responder.sendJson(HttpResponseStatus.OK, results);
    } catch (IllegalArgumentException e) {
        LOG.debug("Got exception:", e);
        responder.sendString(HttpResponseStatus.BAD_REQUEST, e.getMessage());
    } catch (SQLException e) {
        LOG.debug("Got exception:", e);
        responder.sendString(HttpResponseStatus.BAD_REQUEST, String.format("[SQLState %s] %s", e.getSQLState(), e.getMessage()));
    } catch (HandleNotFoundException e) {
        if (e.isInactive()) {
            responder.sendString(HttpResponseStatus.CONFLICT, "Preview is unavailable for inactive queries.");
            return;
        }
        responder.sendStatus(HttpResponseStatus.NOT_FOUND);
    }
}