| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.hadoop.hbase.util; |
| |
| import java.io.IOException; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.hadoop.hbase.TableName; |
| import org.apache.hadoop.hbase.classification.InterfaceAudience; |
| import org.apache.hadoop.hbase.client.TableState; |
| import org.apache.hadoop.hbase.exceptions.DeserializationException; |
| import org.apache.hadoop.hbase.protobuf.ProtobufUtil; |
| import org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos; |
| import org.apache.hadoop.hbase.zookeeper.ZKUtil; |
| import org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher; |
| import org.apache.zookeeper.KeeperException; |
| |
| /** |
| * utlity method to migrate zookeeper data across HBase versions. |
| */ |
| @InterfaceAudience.Private |
| public class ZKDataMigrator { |
| |
| private static final Log LOG = LogFactory.getLog(ZKDataMigrator.class); |
| |
| /** |
| * Method for table states migration. |
| * Used when upgrading from pre-2.0 to 2.0 |
| * Reading state from zk, applying them to internal state |
| * and delete. |
| * Used by master to clean migration from zk based states to |
| * table descriptor based states. |
| */ |
| @Deprecated |
| public static Map<TableName, TableState.State> queryForTableStates(ZooKeeperWatcher zkw) |
| throws KeeperException, InterruptedException { |
| Map<TableName, TableState.State> rv = new HashMap<>(); |
| List<String> children = ZKUtil.listChildrenNoWatch(zkw, zkw.tableZNode); |
| if (children == null) |
| return rv; |
| for (String child: children) { |
| TableName tableName = TableName.valueOf(child); |
| ZooKeeperProtos.DeprecatedTableState.State state = getTableState(zkw, tableName); |
| TableState.State newState = TableState.State.ENABLED; |
| if (state != null) { |
| switch (state) { |
| case ENABLED: |
| newState = TableState.State.ENABLED; |
| break; |
| case DISABLED: |
| newState = TableState.State.DISABLED; |
| break; |
| case DISABLING: |
| newState = TableState.State.DISABLING; |
| break; |
| case ENABLING: |
| newState = TableState.State.ENABLING; |
| break; |
| default: |
| } |
| } |
| rv.put(tableName, newState); |
| } |
| return rv; |
| } |
| |
| /** |
| * Gets table state from ZK. |
| * @param zkw ZooKeeperWatcher instance to use |
| * @param tableName table we're checking |
| * @return Null or {@link ZooKeeperProtos.DeprecatedTableState.State} found in znode. |
| * @throws KeeperException |
| */ |
| @Deprecated |
| private static ZooKeeperProtos.DeprecatedTableState.State getTableState( |
| final ZooKeeperWatcher zkw, final TableName tableName) |
| throws KeeperException, InterruptedException { |
| String znode = ZKUtil.joinZNode(zkw.tableZNode, tableName.getNameAsString()); |
| byte [] data = ZKUtil.getData(zkw, znode); |
| if (data == null || data.length <= 0) return null; |
| try { |
| ProtobufUtil.expectPBMagicPrefix(data); |
| ZooKeeperProtos.DeprecatedTableState.Builder builder = |
| ZooKeeperProtos.DeprecatedTableState.newBuilder(); |
| int magicLen = ProtobufUtil.lengthOfPBMagic(); |
| ProtobufUtil.mergeFrom(builder, data, magicLen, data.length - magicLen); |
| return builder.getState(); |
| } catch (IOException e) { |
| KeeperException ke = new KeeperException.DataInconsistencyException(); |
| ke.initCause(e); |
| throw ke; |
| } catch (DeserializationException e) { |
| throw ZKUtil.convert(e); |
| } |
| } |
| |
| } |