package admin;
// cc ListTablesExample Example listing the existing tables and their descriptors
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.HTableDescriptor;
import org.apache.hadoop.hbase.client.HBaseAdmin;
import org.apache.hadoop.hbase.util.Bytes;
import util.HBaseHelper;
import java.io.IOException;
public class ListTablesExample {
public static void main(String[] args) throws IOException, InterruptedException {
Configuration conf = HBaseConfiguration.create();
HBaseHelper helper = HBaseHelper.getHelper(conf);
helper.dropTable("testtable1");
helper.dropTable("testtable2");
helper.dropTable("testtable3");
helper.createTable("testtable1", "colfam1", "colfam2", "colfam3");
helper.createTable("testtable2", "colfam1", "colfam2", "colfam3");
helper.createTable("testtable3", "colfam1", "colfam2", "colfam3");
// vv ListTablesExample
HBaseAdmin admin = new HBaseAdmin(conf);
HTableDescriptor[] htds = admin.listTables();
// ^^ ListTablesExample
System.out.println("Printing all tables...");
// vv ListTablesExample
for (HTableDescriptor htd : htds) {
System.out.println(htd);
}
HTableDescriptor htd1 = admin.getTableDescriptor(
Bytes.toBytes("testtable1"));
// ^^ ListTablesExample
System.out.println("Printing testtable1...");
// vv ListTablesExample
System.out.println(htd1);
HTableDescriptor htd2 = admin.getTableDescriptor(
Bytes.toBytes("testtable10"));
// ^^ ListTablesExample
System.out.println("Printing testtable10...");
// vv ListTablesExample
System.out.println(htd2);
// ^^ ListTablesExample
}
}