package filters;
// cc CustomFilterExample Example using a custom filter
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.KeyValue;
import org.apache.hadoop.hbase.client.HTable;
import org.apache.hadoop.hbase.client.Result;
import org.apache.hadoop.hbase.client.ResultScanner;
import org.apache.hadoop.hbase.client.Scan;
import org.apache.hadoop.hbase.filter.Filter;
import org.apache.hadoop.hbase.filter.FilterList;
import org.apache.hadoop.hbase.util.Bytes;
import util.HBaseHelper;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
public class CustomFilterExample {
public static void main(String[] args) throws IOException {
Configuration conf = HBaseConfiguration.create();
HBaseHelper helper = HBaseHelper.getHelper(conf);
helper.dropTable("testtable");
helper.createTable("testtable", "colfam1");
System.out.println("Adding rows to table...");
helper.fillTable("testtable", 1, 10, 10, 2, false, "colfam1");
HTable table = new HTable(conf, "testtable");
// vv CustomFilterExample
List<Filter> filters = new ArrayList<Filter>();
Filter filter1 = new CustomFilter(Bytes.toBytes("val-05.05"));
filters.add(filter1);
Filter filter2 = new CustomFilter(Bytes.toBytes("val-02.07"));
filters.add(filter2);
Filter filter3 = new CustomFilter(Bytes.toBytes("val-09.00"));
filters.add(filter3);
FilterList filterList = new FilterList(
FilterList.Operator.MUST_PASS_ONE, filters);
Scan scan = new Scan();
scan.setFilter(filterList);
ResultScanner scanner = table.getScanner(scan);
// ^^ CustomFilterExample
System.out.println("Results of scan:");
// vv CustomFilterExample
for (Result result : scanner) {
for (KeyValue kv : result.raw()) {
System.out.println("KV: " + kv + ", Value: " +
Bytes.toString(kv.getValue()));
}
}
scanner.close();
// ^^ CustomFilterExample
}
}