| /** |
| * 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.master; |
| |
| import java.io.IOException; |
| import java.util.HashMap; |
| import java.util.Map; |
| import java.util.Set; |
| import java.util.concurrent.locks.ReadWriteLock; |
| import java.util.concurrent.locks.ReentrantReadWriteLock; |
| |
| import com.google.common.collect.Sets; |
| import edu.umd.cs.findbugs.annotations.NonNull; |
| import edu.umd.cs.findbugs.annotations.Nullable; |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.hadoop.hbase.HTableDescriptor; |
| import org.apache.hadoop.hbase.MetaTableAccessor; |
| import org.apache.hadoop.hbase.TableDescriptors; |
| import org.apache.hadoop.hbase.TableName; |
| import org.apache.hadoop.hbase.TableNotFoundException; |
| import org.apache.hadoop.hbase.classification.InterfaceAudience; |
| import org.apache.hadoop.hbase.client.Connection; |
| import org.apache.hadoop.hbase.client.Result; |
| import org.apache.hadoop.hbase.client.TableState; |
| |
| /** |
| * This is a helper class used to manage table states. |
| * States persisted in tableinfo and cached internally. |
| */ |
| @InterfaceAudience.Private |
| public class TableStateManager { |
| private static final Log LOG = LogFactory.getLog(TableStateManager.class); |
| |
| private final ReadWriteLock lock = new ReentrantReadWriteLock(); |
| private final MasterServices master; |
| |
| public TableStateManager(MasterServices master) { |
| this.master = master; |
| } |
| |
| /** |
| * Set table state to provided. |
| * Caller should lock table on write. |
| * @param tableName table to change state for |
| * @param newState new state |
| * @throws IOException |
| */ |
| public void setTableState(TableName tableName, TableState.State newState) throws IOException { |
| lock.writeLock().lock(); |
| try { |
| udpateMetaState(tableName, newState); |
| } finally { |
| lock.writeLock().unlock(); |
| } |
| |
| } |
| |
| /** |
| * Set table state to provided but only if table in specified states |
| * Caller should lock table on write. |
| * @param tableName table to change state for |
| * @param newState new state |
| * @param states states to check against |
| * @return null if succeed or table state if failed |
| * @throws IOException |
| */ |
| public TableState.State setTableStateIfInStates(TableName tableName, |
| TableState.State newState, |
| TableState.State... states) |
| throws IOException { |
| lock.writeLock().lock(); |
| try { |
| TableState currentState = readMetaState(tableName); |
| if (currentState == null) { |
| throw new TableNotFoundException(tableName); |
| } |
| if (currentState.inStates(states)) { |
| udpateMetaState(tableName, newState); |
| return null; |
| } else { |
| return currentState.getState(); |
| } |
| } finally { |
| lock.writeLock().unlock(); |
| } |
| |
| } |
| |
| /** |
| * Set table state to provided but only if table not in specified states |
| * Caller should lock table on write. |
| * @param tableName table to change state for |
| * @param newState new state |
| * @param states states to check against |
| * @throws IOException |
| */ |
| public boolean setTableStateIfNotInStates(TableName tableName, |
| TableState.State newState, |
| TableState.State... states) |
| throws IOException { |
| TableState currentState = readMetaState(tableName); |
| if (currentState == null) { |
| throw new TableNotFoundException(tableName); |
| } |
| if (!currentState.inStates(states)) { |
| udpateMetaState(tableName, newState); |
| return true; |
| } else { |
| return false; |
| } |
| } |
| |
| public boolean isTableState(TableName tableName, TableState.State... states) { |
| try { |
| TableState.State tableState = getTableState(tableName); |
| return TableState.isInStates(tableState, states); |
| } catch (IOException e) { |
| LOG.error("Unable to get table " + tableName + " state", e); |
| return false; |
| } |
| } |
| |
| public void setDeletedTable(TableName tableName) throws IOException { |
| if (tableName.equals(TableName.META_TABLE_NAME)) |
| return; |
| MetaTableAccessor.deleteTableState(master.getConnection(), tableName); |
| } |
| |
| public boolean isTablePresent(TableName tableName) throws IOException { |
| return readMetaState(tableName) != null; |
| } |
| |
| /** |
| * Return all tables in given states. |
| * |
| * @param states filter by states |
| * @return tables in given states |
| * @throws IOException |
| */ |
| public Set<TableName> getTablesInStates(final TableState.State... states) throws IOException { |
| final Set<TableName> rv = Sets.newHashSet(); |
| MetaTableAccessor.fullScanTables(master.getConnection(), new MetaTableAccessor.Visitor() { |
| @Override |
| public boolean visit(Result r) throws IOException { |
| TableState tableState = MetaTableAccessor.getTableState(r); |
| if (tableState != null && tableState.inStates(states)) |
| rv.add(tableState.getTableName()); |
| return true; |
| } |
| }); |
| return rv; |
| } |
| |
| @NonNull |
| public TableState.State getTableState(TableName tableName) throws IOException { |
| TableState currentState = readMetaState(tableName); |
| if (currentState == null) { |
| throw new TableNotFoundException(tableName); |
| } |
| return currentState.getState(); |
| } |
| |
| protected void udpateMetaState(TableName tableName, TableState.State newState) |
| throws IOException { |
| MetaTableAccessor.updateTableState(master.getConnection(), tableName, newState); |
| } |
| |
| @Nullable |
| protected TableState readMetaState(TableName tableName) throws IOException { |
| if (tableName.equals(TableName.META_TABLE_NAME)) |
| return new TableState(tableName, TableState.State.ENABLED); |
| return MetaTableAccessor.getTableState(master.getConnection(), tableName); |
| } |
| |
| public void start() throws IOException { |
| TableDescriptors tableDescriptors = master.getTableDescriptors(); |
| Connection connection = master.getConnection(); |
| fixTableStates(tableDescriptors, connection); |
| } |
| |
| public static void fixTableStates(TableDescriptors tableDescriptors, Connection connection) |
| throws IOException { |
| final Map<String, HTableDescriptor> allDescriptors = |
| tableDescriptors.getAllDescriptors(); |
| final Map<String, TableState> states = new HashMap<>(); |
| MetaTableAccessor.fullScanTables(connection, new MetaTableAccessor.Visitor() { |
| @Override |
| public boolean visit(Result r) throws IOException { |
| TableState state = MetaTableAccessor.getTableState(r); |
| if (state != null) |
| states.put(state.getTableName().getNameAsString(), state); |
| return true; |
| } |
| }); |
| for (Map.Entry<String, HTableDescriptor> entry : allDescriptors.entrySet()) { |
| String table = entry.getKey(); |
| if (table.equals(TableName.META_TABLE_NAME.getNameAsString())) |
| continue; |
| if (!states.containsKey(table)) { |
| LOG.warn("Found table with no state, assuming ENABLED"); |
| MetaTableAccessor.updateTableState(connection, TableName.valueOf(table), |
| TableState.State.ENABLED); |
| } |
| } |
| } |
| } |