HBase Clients - HBase Essentials - page 103

System.out.println(employee.getEmployeeId());
System.out.println(employee.getEmployeeName());
System.out.println(employee.getAddress());
System.out.println(employee.getDepartment());

Using ilters within query
To start using ilters with Kundera, perform the following steps:

1. Create the EntityManager instance and use the getDelegate method to get
the map of clients.
2. Fetch the client from the map of clients, speciic to your persistence-unit.
3. Finally, create a Filter object of whichever ilter you want to use and set

it into the HbaseClient object:

Map<String, Client> clients = (Map<String, Client>)
em.getDelegate();
HBaseClient client = (HBaseClient) clients.get("hbaseTest");
Filter prefixFilter = new PrefixFilter(Bytes.toBytes("1"));
client.setFilter(prefixFilter);

The following code shows a few examples using the ilter while querying HBase
using Kundera:

String queryString = "Select e from Employee e";
Query query = em.createQuery(queryString);
List<Employee> employees = query.getResultList();

System.out.println(employees.size());

employee = employees.get(0);

System.out.println(employee.getEmployeeId());
System.out.println(employee.getEmployeeName());
System.out.println(employee.getAddress());
System.out.println(employee.getDepartment());

Filter keyOnlyFilter = new KeyOnlyFilter();