package admin;
// cc TableOperationsExample Example using the various calls to disable, enable, and check that status of a table
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.HColumnDescriptor;
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 TableOperationsExample {
public static void main(String[] args) throws IOException, InterruptedException {
Configuration conf = HBaseConfiguration.create();
HBaseHelper helper = HBaseHelper.getHelper(conf);
helper.dropTable("testtable");
// vv TableOperationsExample
HBaseAdmin admin = new HBaseAdmin(conf);
HTableDescriptor desc = new HTableDescriptor(
Bytes.toBytes("testtable"));
HColumnDescriptor coldef = new HColumnDescriptor(
Bytes.toBytes("colfam1"));
desc.addFamily(coldef);
// ^^ TableOperationsExample
System.out.println("Creating table...");
// vv TableOperationsExample
admin.createTable(desc);
// ^^ TableOperationsExample
System.out.println("Deleting enabled table...");
// vv TableOperationsExample
try {
admin.deleteTable(Bytes.toBytes("testtable"));
} catch (IOException e) {
System.err.println("Error deleting table: " + e.getMessage());
}
// ^^ TableOperationsExample
System.out.println("Disabling table...");
// vv TableOperationsExample
admin.disableTable(Bytes.toBytes("testtable"));
boolean isDisabled = admin.isTableDisabled(Bytes.toBytes("testtable"));
System.out.println("Table is disabled: " + isDisabled);
boolean avail1 = admin.isTableAvailable(Bytes.toBytes("testtable"));
System.out.println("Table available: " + avail1);
// ^^ TableOperationsExample
System.out.println("Deleting disabled table...");
// vv TableOperationsExample
admin.deleteTable(Bytes.toBytes("testtable"));
boolean avail2 = admin.isTableAvailable(Bytes.toBytes("testtable"));
System.out.println("Table available: " + avail2);
// ^^ TableOperationsExample
System.out.println("Creating table again...");
// vv TableOperationsExample
admin.createTable(desc);
boolean isEnabled = admin.isTableEnabled(Bytes.toBytes("testtable"));
System.out.println("Table is enabled: " + isEnabled);
// ^^ TableOperationsExample
}
}