package client;
// cc DeleteTimestampExample Example application deleting with explicit timestamps
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.client.Delete;
import org.apache.hadoop.hbase.client.HBaseAdmin;
import org.apache.hadoop.hbase.client.HTable;
import org.apache.hadoop.hbase.client.Put;
import org.apache.hadoop.hbase.util.Bytes;
import util.HBaseHelper;
import java.io.IOException;
public class DeleteTimestampExample {
private final static byte[] ROW1 = Bytes.toBytes("row1");
private final static byte[] COLFAM1 = Bytes.toBytes("colfam1");
private final static byte[] QUAL1 = Bytes.toBytes("qual1");
public static void main(String[] args) throws IOException, InterruptedException {
Configuration conf = HBaseConfiguration.create();
HBaseHelper helper = HBaseHelper.getHelper(conf);
helper.dropTable("testtable");
helper.createTable("testtable", "colfam1");
HTable table = new HTable(conf, "testtable");
HBaseAdmin admin = new HBaseAdmin(conf);
// vv DeleteTimestampExample
for (int count = 1; count <= 6; count++) { // co DeleteTimestampExample-1-Put Store the same column six times.
Put put = new Put(ROW1);
put.add(COLFAM1, QUAL1, count, Bytes.toBytes("val-" + count)); // co DeleteTimestampExample-2-Add The version is set to a specific value, using the loop variable.
table.put(put);
}
// ^^ DeleteTimestampExample
System.out.println("After put calls...");
helper.dump("testtable", new String[] { "row1" }, null, null);
// admin.flush("testtable");
// Thread.sleep(3000);
// admin.majorCompact("testtable");
// Thread.sleep(3000);
// vv DeleteTimestampExample
Delete delete = new Delete(ROW1); // co DeleteTimestampExample-3-Delete Delete the newest two versions.
delete.deleteColumn(COLFAM1, QUAL1, 5);
delete.deleteColumn(COLFAM1, QUAL1, 6);
table.delete(delete);
// ^^ DeleteTimestampExample
System.out.println("After delete call...");
helper.dump("testtable", new String[]{ "row1" }, null, null);
}
}