Examples with EntityResolver com.microsoft.azure.storage.table.EntityResolver used on opensource projects

Example 1 with EntityResolver

use of com.microsoft.azure.storage.table.EntityResolver in project YCSB by brianfrankcooper.

the class AzureClient method readSubset.

/*
   * Read subset of properties instead of full fields with projection.
   */
public Status readSubset(String key, Set<String> fields, HashMap<String, ByteIterator> result) {
    String whereStr = String.format("RowKey eq '%s'", key);
    TableQuery<TableServiceEntity> projectionQuery = TableQuery.from(TableServiceEntity.class).where(whereStr).select(fields.toArray(new String[0]));
    EntityResolver<HashMap<String, ByteIterator>> resolver = new EntityResolver<HashMap<String, ByteIterator>>() {

        public HashMap<String, ByteIterator> resolve(String partitionkey, String rowKey, Date timeStamp, HashMap<String, EntityProperty> properties, String etag) {
            HashMap<String, ByteIterator> tmp = new HashMap<String, ByteIterator>();
            for (Entry<String, EntityProperty> entry : properties.entrySet()) {
                String key = entry.getKey();
                ByteIterator val = new ByteArrayByteIterator(entry.getValue().getValueAsByteArray());
                tmp.put(key, val);
            }
            return tmp;
        }
    };
    try {
        for (HashMap<String, ByteIterator> tmp : cloudTable.execute(projectionQuery, resolver)) {
            for (Entry<String, ByteIterator> entry : tmp.entrySet()) {
                String fieldName = entry.getKey();
                ByteIterator fieldVal = entry.getValue();
                result.put(fieldName, fieldVal);
            }
        }
        return Status.OK;
    } catch (Exception e) {
        return Status.ERROR;
    }
}