Examples with SqlQuerySpec com.azure.cosmos.models.SqlQuerySpec used on opensource projects

Example 1 with SqlQuerySpec

use of com.azure.cosmos.models.SqlQuerySpec in project YCSB by brianfrankcooper.

the class AzureCosmosClient method scan.

/**
 * Perform a range scan for a set of records in the database. Each field/value
 * pair from the result will be stored in a HashMap.
 *
 * @param table       The name of the table
 * @param startkey    The record key of the first record to read.
 * @param recordcount The number of records to read
 * @param fields      The list of fields to read, or null for all of them
 * @param result      A Vector of HashMaps, where each HashMap is a set
 *                    field/value pairs for one record
 * @return Zero on success, a non-zero error code on error
 */
@Override
public Status scan(String table, String startkey, int recordcount, Set<String> fields, Vector<HashMap<String, ByteIterator>> result) {
    try {
        CosmosQueryRequestOptions queryOptions = new CosmosQueryRequestOptions();
        queryOptions.setMaxDegreeOfParallelism(AzureCosmosClient.maxDegreeOfParallelism);
        queryOptions.setMaxBufferedItemCount(AzureCosmosClient.maxBufferedItemCount);
        CosmosContainer container = AzureCosmosClient.containerCache.get(table);
        if (container == null) {
            container = AzureCosmosClient.database.getContainer(table);
            AzureCosmosClient.containerCache.put(table, container);
        }
        List<SqlParameter> paramList = new ArrayList<>();
        paramList.add(new SqlParameter("@startkey", startkey));
        SqlQuerySpec querySpec = new SqlQuerySpec(this.createSelectTop(fields, recordcount) + " FROM root r WHERE r.id >= @startkey", paramList);
        CosmosPagedIterable<ObjectNode> pagedIterable = container.queryItems(querySpec, queryOptions, ObjectNode.class);
        Iterator<FeedResponse<ObjectNode>> pageIterator = pagedIterable.iterableByPage(AzureCosmosClient.preferredPageSize).iterator();
        while (pageIterator.hasNext()) {
            List<ObjectNode> pageDocs = pageIterator.next().getResults();
            for (ObjectNode doc : pageDocs) {
                Map<String, String> stringResults = new HashMap<>(doc.size());
                Iterator<Map.Entry<String, JsonNode>> nodeIterator = doc.fields();
                while (nodeIterator.hasNext()) {
                    Entry<String, JsonNode> pair = nodeIterator.next();
                    stringResults.put(pair.getKey().toString(), pair.getValue().toString());
                }
                HashMap<String, ByteIterator> byteResults = new HashMap<>(doc.size());
                StringByteIterator.putAllAsByteIterators(byteResults, stringResults);
                result.add(byteResults);
            }
        }
        return Status.OK;
    } catch (CosmosException e) {
        if (!AzureCosmosClient.includeExceptionStackInLog) {
            e = null;
        }
        LOGGER.error("Failed to query key {} from collection {} in database {}", startkey, table, AzureCosmosClient.databaseName, e);
    }
    return Status.ERROR;
}