Examples with Cache com.yahoo.elide.datastores.aggregation.cache.Cache used on opensource projects

Example 1 with Cache

use of com.yahoo.elide.datastores.aggregation.cache.Cache in project elide by yahoo.

the class AggregationDataStoreTransaction method loadObjects.

@Override
public <T> DataStoreIterable<T> loadObjects(EntityProjection entityProjection, RequestScope scope) {
    QueryResult result = null;
    QueryResponse response = null;
    String cacheKey = null;
    try {
        // Convert multivalued map to map.
        Map<String, String> headers = scope.getRequestHeaders().entrySet().stream().collect(Collectors.toMap(Map.Entry::getKey, (entry) -> entry.getValue().stream().collect(Collectors.joining(" "))));
        queryLogger.acceptQuery(scope.getRequestId(), scope.getUser(), headers, scope.getApiVersion(), scope.getQueryParams(), scope.getPath());
        Query query = buildQuery(entityProjection, scope);
        Table table = (Table) query.getSource();
        if (cache != null && !query.isBypassingCache()) {
            String tableVersion = queryEngine.getTableVersion(table, queryEngineTransaction);
            tableVersion = tableVersion == null ? "" : tableVersion;
            cacheKey = tableVersion + ';' + QueryKeyExtractor.extractKey(query);
            result = cache.get(cacheKey);
        }
        boolean isCached = result != null;
        List<String> queryText = queryEngine.explain(query);
        queryLogger.processQuery(scope.getRequestId(), query, queryText, isCached);
        if (result == null) {
            result = queryEngine.executeQuery(query, queryEngineTransaction);
            if (cacheKey != null) {
                // The query result needs to be streamed into an in memory list before caching.
                // TODO - add a cap to how many records can be streamed back.  If this is exceeded, abort caching
                // and return the results.
                QueryResult cacheableResult = QueryResult.builder().data(Lists.newArrayList(result.getData().iterator())).pageTotals(result.getPageTotals()).build();
                cache.put(cacheKey, cacheableResult);
                result = cacheableResult;
            }
        }
        if (entityProjection.getPagination() != null && entityProjection.getPagination().returnPageTotals()) {
            entityProjection.getPagination().setPageTotals(result.getPageTotals());
        }
        response = new QueryResponse(HttpStatus.SC_OK, result.getData(), null);
        return new DataStoreIterableBuilder(result.getData()).build();
    } catch (HttpStatusException e) {
        response = new QueryResponse(e.getStatus(), null, e.getMessage());
        throw e;
    } catch (Exception e) {
        response = new QueryResponse(HttpStatus.SC_INTERNAL_SERVER_ERROR, null, e.getMessage());
        throw e;
    } finally {
        queryLogger.completeQuery(scope.getRequestId(), response);
    }
}