try {
log.info("test method: TestDeleteByQuery using DynamoDB store.");
DynamoDBKey<String, String> dKey = new DynamoDBKey<String, String>();
dKey.setHashKey("NOWHERE");
dKey.setRangeKey("10/10/1880");
person p1 = buildPerson(dKey.getHashKey().toString(), dKey.getRangeKey().toString(), "John", "Doe", "Peru", "Brazil", "Ecuador");
dataStore.put(dKey, p1);
dKey.setRangeKey("11/10/1707");
person p2 = buildPerson(dKey.getHashKey().toString(), dKey.getRangeKey().toString(), "Juan", "Perez", "Germany", "USA", "Scotland");
dataStore.put(dKey, p2);
DynamoDBQuery.setScanCompOp(ComparisonOperator.LE);
DynamoDBQuery.setType(DynamoDBQuery.SCAN_QUERY);
Query<DynamoDBKey, person> query = new DynamoDBQuery<DynamoDBKey, person>();
query.setKey(dKey);