@Override
void perform() throws IOException {
HTableDescriptor selected = selectTable(disabledTables);
HColumnDescriptor cfd = selectFamily(selected);
if (selected == null || cfd == null) {
return;
}
Admin admin = connection.getAdmin();
try {
if (selected.getColumnFamilies().length < 2) {
LOG.info("No enough column families to delete in table " + selected.getTableName());
return;
}
TableName tableName = selected.getTableName();
LOG.info("Deleting column family: " + cfd + " from table: " + tableName);
admin.deleteColumnFamily(tableName, cfd.getName());
// assertion
HTableDescriptor freshTableDesc = admin.getTableDescriptor(tableName);
Assert.assertFalse(
"Column family: " + cfd + " was not added", freshTableDesc.hasFamily(cfd.getName()));
LOG.info("Deleted column family: " + cfd + " from table: " + tableName);
disabledTables.put(tableName, freshTableDesc);
} catch (Exception e) {
LOG.warn("Caught exception in action: " + this.getClass());
throw e;
} finally {
admin.close();
}
verifyTables();
}
// ColumnAction has implemented selectFamily() shared by multiple family Actions
protected HColumnDescriptor selectFamily(HTableDescriptor htd) {
if (htd == null) {
return null;
}
HColumnDescriptor[] families = htd.getColumnFamilies();
if (families.length == 0) {
LOG.info("No column families in table: " + htd);
return null;
}
HColumnDescriptor randomCfd = families[RandomUtils.nextInt(families.length)];
return randomCfd;
}