/*
    *
    * 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.coprocessor;
  
  import org.apache.hadoop.hbase.ClusterStatus;
  import org.apache.hadoop.hbase.classification.InterfaceAudience;
  import org.apache.hadoop.hbase.classification.InterfaceStability;
  import org.apache.hadoop.hbase.HBaseInterfaceAudience;
  import org.apache.hadoop.hbase.ProcedureInfo;
  import org.apache.hadoop.hbase.TableName;
  import org.apache.hadoop.hbase.HColumnDescriptor;
  import org.apache.hadoop.hbase.HRegionInfo;
  import org.apache.hadoop.hbase.CoprocessorEnvironment;
  import org.apache.hadoop.hbase.HTableDescriptor;
  import org.apache.hadoop.hbase.NamespaceDescriptor;
  import org.apache.hadoop.hbase.ServerName;
  import org.apache.hadoop.hbase.client.Admin;
  import org.apache.hadoop.hbase.master.RegionPlan;
  import org.apache.hadoop.hbase.master.procedure.MasterProcedureEnv;
  import org.apache.hadoop.hbase.net.Address;
  import org.apache.hadoop.hbase.procedure2.ProcedureExecutor;
  import org.apache.hadoop.hbase.protobuf.generated.HBaseProtos.SnapshotDescription;
  import org.apache.hadoop.hbase.protobuf.generated.QuotaProtos.Quotas;
  
  import java.io.IOException;
  import java.util.List;
  import java.util.Set;
  
  @InterfaceAudience.LimitedPrivate({HBaseInterfaceAudience.COPROC, HBaseInterfaceAudience.CONFIG})
  @InterfaceStability.Evolving
  public class BaseMasterObserver implements MasterObserver {
    @Override
    public void preCreateTable(ObserverContext<MasterCoprocessorEnvironment> ctx,
        HTableDescriptor desc, HRegionInfo[] regions) throws IOException {
    }
  
    @Override
    public void postCreateTable(ObserverContext<MasterCoprocessorEnvironment> ctx,
        HTableDescriptor desc, HRegionInfo[] regions) throws IOException {
    }
  
    @Override
    public void preCreateTableHandler(
        final ObserverContext<MasterCoprocessorEnvironment> ctx,
        HTableDescriptor desc, HRegionInfo[] regions) throws IOException {
    }
  
    @Override
    public void postCreateTableHandler(
        final ObserverContext<MasterCoprocessorEnvironment> ctx,
        HTableDescriptor desc, HRegionInfo[] regions) throws IOException {
    }
  
    @Override
    public void preDispatchMerge(final ObserverContext<MasterCoprocessorEnvironment> ctx,
        HRegionInfo regionA, HRegionInfo regionB) throws IOException {
    }
  
    @Override
    public void postDispatchMerge(final ObserverContext<MasterCoprocessorEnvironment> ctx,
        HRegionInfo regionA, HRegionInfo regionB) throws IOException {
    }
  
    @Override
    public void preGetClusterStatus(ObserverContext<MasterCoprocessorEnvironment> ctx)
        throws IOException {
    }
  
    @Override
    public void postGetClusterStatus(ObserverContext<MasterCoprocessorEnvironment> ctx,
        ClusterStatus status)
        throws IOException {
    }
  
    @Override
    public void preClearDeadServers(ObserverContext<MasterCoprocessorEnvironment> ctx)
      throws IOException {
    }
  
    @Override
    public void postClearDeadServers(ObserverContext<MasterCoprocessorEnvironment> ctx,
        List<ServerName> servers, List<ServerName> notClearedServers) throws IOException {
   }
 
   @Override
   public void preDeleteTable(ObserverContext<MasterCoprocessorEnvironment> ctx,
       TableName tableName) throws IOException {
   }
 
   @Override
   public void postDeleteTable(ObserverContext<MasterCoprocessorEnvironment> ctx,
       TableName tableName) throws IOException {
   }
 
   @Override
   public void preDeleteTableHandler(
       final ObserverContext<MasterCoprocessorEnvironment> ctx, TableName tableName)
       throws IOException{
   }
 
   @Override
   public void postDeleteTableHandler(
       final ObserverContext<MasterCoprocessorEnvironment> ctx, TableName tableName)
       throws IOException {
   }
 
   @Override
   public void preTruncateTable(ObserverContext<MasterCoprocessorEnvironment> ctx,
       TableName tableName) throws IOException {
   }
 
   @Override
   public void postTruncateTable(ObserverContext<MasterCoprocessorEnvironment> ctx,
       TableName tableName) throws IOException {
   }
 
   @Override
   public void preTruncateTableHandler(
       final ObserverContext<MasterCoprocessorEnvironment> ctx, TableName tableName)
       throws IOException {
   }
 
   @Override
   public void postTruncateTableHandler(
       final ObserverContext<MasterCoprocessorEnvironment> ctx, TableName tableName)
       throws IOException {
   }
 
   @Override
   public void preModifyTable(ObserverContext<MasterCoprocessorEnvironment> ctx,
       TableName tableName, HTableDescriptor htd) throws IOException {
   }
 
   @Override
   public void postModifyTableHandler(
       ObserverContext<MasterCoprocessorEnvironment> ctx, TableName tableName,
       HTableDescriptor htd) throws IOException {
   }
 
   @Override
   public void preModifyTableHandler(
       ObserverContext<MasterCoprocessorEnvironment> ctx, TableName tableName,
       HTableDescriptor htd) throws IOException {
   }
 
   @Override
   public void postModifyTable(ObserverContext<MasterCoprocessorEnvironment> ctx,
       TableName tableName, HTableDescriptor htd) throws IOException {
   }
 
   @Override
   public void preCreateNamespace(
       ObserverContext<MasterCoprocessorEnvironment> ctx, NamespaceDescriptor ns)
           throws IOException {
   }
 
   @Override
   public void postCreateNamespace(
       ObserverContext<MasterCoprocessorEnvironment> ctx, NamespaceDescriptor ns)
           throws IOException {
   }
 
   @Override
   public void preDeleteNamespace(
       ObserverContext<MasterCoprocessorEnvironment> ctx, String namespace) throws IOException {
   }
 
   @Override
   public void postDeleteNamespace(
       ObserverContext<MasterCoprocessorEnvironment> ctx, String namespace) throws IOException {
   }
 
   @Override
   public void preModifyNamespace(
       ObserverContext<MasterCoprocessorEnvironment> ctx, NamespaceDescriptor ns)
           throws IOException {
   }
 
   @Override
   public void postModifyNamespace(
       ObserverContext<MasterCoprocessorEnvironment> ctx, NamespaceDescriptor ns)
           throws IOException {
   }
 
   @Override
   public void preGetNamespaceDescriptor(ObserverContext<MasterCoprocessorEnvironment> ctx,
       String namespace) throws IOException {
   }
 
   @Override
   public void postGetNamespaceDescriptor(ObserverContext<MasterCoprocessorEnvironment> ctx,
       NamespaceDescriptor ns) throws IOException {
   }
 
   @Override
   public void preListNamespaceDescriptors(ObserverContext<MasterCoprocessorEnvironment> ctx,
       List<NamespaceDescriptor> descriptors) throws IOException {
   }
 
   @Override
   public void postListNamespaceDescriptors(ObserverContext<MasterCoprocessorEnvironment> ctx,
       List<NamespaceDescriptor> descriptors) throws IOException {
   }
 
   @Override
   public void preAddColumn(ObserverContext<MasterCoprocessorEnvironment> ctx,
       TableName tableName, HColumnDescriptor column) throws IOException {
   }
 
   @Override
   public void postAddColumn(ObserverContext<MasterCoprocessorEnvironment> ctx,
       TableName tableName, HColumnDescriptor column) throws IOException {
   }
 
   @Override
   public void preAddColumnHandler(
       ObserverContext<MasterCoprocessorEnvironment> ctx, TableName tableName,
       HColumnDescriptor column) throws IOException {
   }
 
   @Override
   public void postAddColumnHandler(
       ObserverContext<MasterCoprocessorEnvironment> ctx, TableName tableName,
       HColumnDescriptor column) throws IOException {
   }
 
   @Override
   public void preModifyColumn(ObserverContext<MasterCoprocessorEnvironment> ctx,
       TableName tableName, HColumnDescriptor descriptor) throws IOException {
   }
 
   @Override
   public void postModifyColumn(ObserverContext<MasterCoprocessorEnvironment> ctx,
       TableName tableName, HColumnDescriptor descriptor) throws IOException {
   }
 
   @Override
   public void preModifyColumnHandler(
       ObserverContext<MasterCoprocessorEnvironment> ctx, TableName tableName,
       HColumnDescriptor descriptor) throws IOException {
   }
 
   @Override
   public void postModifyColumnHandler(
       ObserverContext<MasterCoprocessorEnvironment> ctx, TableName tableName,
       HColumnDescriptor descriptor) throws IOException {
   }
 
   @Override
   public void preDeleteColumn(ObserverContext<MasterCoprocessorEnvironment> ctx,
       TableName tableName, byte[] c) throws IOException {
   }
 
   @Override
   public void postDeleteColumn(ObserverContext<MasterCoprocessorEnvironment> ctx,
       TableName tableName, byte[] c) throws IOException {
   }
 
   @Override
   public void preDeleteColumnHandler(
       ObserverContext<MasterCoprocessorEnvironment> ctx, TableName tableName,
       byte[] c) throws IOException {
   }
 
   @Override
   public void postDeleteColumnHandler(
       ObserverContext<MasterCoprocessorEnvironment> ctx, TableName tableName,
       byte[] c) throws IOException {
   }
 
 
   @Override
   public void preEnableTable(ObserverContext<MasterCoprocessorEnvironment> ctx,
       TableName tableName) throws IOException {
   }
 
   @Override
   public void postEnableTable(ObserverContext<MasterCoprocessorEnvironment> ctx,
       TableName tableName) throws IOException {
   }
 
   @Override
   public void preEnableTableHandler(
       ObserverContext<MasterCoprocessorEnvironment> ctx, TableName tableName)
       throws IOException {
   }
 
   @Override
   public void postEnableTableHandler(
       ObserverContext<MasterCoprocessorEnvironment> ctx, TableName tableName)
       throws IOException {
   }
 
   @Override
   public void preDisableTable(ObserverContext<MasterCoprocessorEnvironment> ctx,
       TableName tableName) throws IOException {
   }
 
   @Override
   public void postDisableTable(ObserverContext<MasterCoprocessorEnvironment> ctx,
       TableName tableName) throws IOException {
   }
 
   @Override
   public void preDisableTableHandler(
       ObserverContext<MasterCoprocessorEnvironment> ctx, TableName tableName)
       throws IOException {
   }
 
   @Override
   public void postDisableTableHandler(
       ObserverContext<MasterCoprocessorEnvironment> ctx, TableName tableName)
       throws IOException {
   }
 
   @Override
   public void preAbortProcedure(
       ObserverContext<MasterCoprocessorEnvironment> ctx,
       final ProcedureExecutor<MasterProcedureEnv> procEnv,
       final long procId) throws IOException {
   }
 
   @Override
   public void postAbortProcedure(ObserverContext<MasterCoprocessorEnvironment> ctx)
       throws IOException {
   }
 
   @Override
   public void preListProcedures(ObserverContext<MasterCoprocessorEnvironment> ctx)
       throws IOException {
   }
 
   @Override
   public void postListProcedures(
       ObserverContext<MasterCoprocessorEnvironment> ctx,
       List<ProcedureInfo> procInfoList) throws IOException {
   }
 
   @Override
   public void preAssign(ObserverContext<MasterCoprocessorEnvironment> ctx,
       HRegionInfo regionInfo) throws IOException {
   }
 
   @Override
   public void postAssign(ObserverContext<MasterCoprocessorEnvironment> ctx,
       HRegionInfo regionInfo) throws IOException {
   }
 
   @Override
   public void preUnassign(ObserverContext<MasterCoprocessorEnvironment> ctx,
       HRegionInfo regionInfo, boolean force) throws IOException {
   }
 
   @Override
   public void postUnassign(ObserverContext<MasterCoprocessorEnvironment> ctx,
       HRegionInfo regionInfo, boolean force) throws IOException {
   }
 
   @Override
   public void preRegionOffline(ObserverContext<MasterCoprocessorEnvironment> ctx,
     HRegionInfo regionInfo) throws IOException {
   }
 
   @Override
   public void postRegionOffline(ObserverContext<MasterCoprocessorEnvironment> ctx,
     HRegionInfo regionInfo) throws IOException {
   }
 
   @Override
   public boolean preSetSplitOrMergeEnabled(final ObserverContext<MasterCoprocessorEnvironment> ctx,
       final boolean newValue, final Admin.MasterSwitchType switchType) throws IOException {
     return false;
   }
 
   @Override
   public void postSetSplitOrMergeEnabled(final ObserverContext<MasterCoprocessorEnvironment> ctx,
       final boolean newValue, final Admin.MasterSwitchType switchType) throws IOException {
   }
 
   @Override
   public void preBalance(ObserverContext<MasterCoprocessorEnvironment> ctx)
       throws IOException {
   }
 
   @Override
   public void postBalance(ObserverContext<MasterCoprocessorEnvironment> ctx, List<RegionPlan> plans)
       throws IOException {
   }
 
   @Override
   public boolean preBalanceSwitch(ObserverContext<MasterCoprocessorEnvironment> ctx,
       boolean b) throws IOException {
     return b;
   }
 
   @Override
   public void postBalanceSwitch(ObserverContext<MasterCoprocessorEnvironment> ctx,
       boolean oldValue, boolean newValue) throws IOException {
   }
 
   @Override
   public void preShutdown(ObserverContext<MasterCoprocessorEnvironment> ctx)
       throws IOException {
   }
 
   @Override
   public void preStopMaster(ObserverContext<MasterCoprocessorEnvironment> ctx)
       throws IOException {
   }
 
   @Override
   public void postStartMaster(ObserverContext<MasterCoprocessorEnvironment> ctx)
       throws IOException {
   }
 
   @Override
   public void preMasterInitialization(
       ObserverContext<MasterCoprocessorEnvironment> ctx) throws IOException {
   }
 
   @Override
   public void start(CoprocessorEnvironment ctx) throws IOException {
   }
 
   @Override
   public void stop(CoprocessorEnvironment ctx) throws IOException {
   }
 
   @Override
   public void preMove(ObserverContext<MasterCoprocessorEnvironment> ctx,
       HRegionInfo region, ServerName srcServer, ServerName destServer)
   throws IOException {
   }
 
   @Override
   public void postMove(ObserverContext<MasterCoprocessorEnvironment> ctx,
       HRegionInfo region, ServerName srcServer, ServerName destServer)
   throws IOException {
   }
 
   @Override
   public void preSnapshot(final ObserverContext<MasterCoprocessorEnvironment> ctx,
       final SnapshotDescription snapshot, final HTableDescriptor hTableDescriptor)
       throws IOException {
   }
 
   @Override
   public void postSnapshot(final ObserverContext<MasterCoprocessorEnvironment> ctx,
       final SnapshotDescription snapshot, final HTableDescriptor hTableDescriptor)
       throws IOException {
   }
 
   @Override
   public void preListSnapshot(final ObserverContext<MasterCoprocessorEnvironment> ctx,
       final SnapshotDescription snapshot) throws IOException {
   }
 
   @Override
   public void postListSnapshot(final ObserverContext<MasterCoprocessorEnvironment> ctx,
       final SnapshotDescription snapshot) throws IOException {
   }
 
   @Override
   public void preCloneSnapshot(final ObserverContext<MasterCoprocessorEnvironment> ctx,
       final SnapshotDescription snapshot, final HTableDescriptor hTableDescriptor)
       throws IOException {
   }
 
   @Override
   public void postCloneSnapshot(final ObserverContext<MasterCoprocessorEnvironment> ctx,
       final SnapshotDescription snapshot, final HTableDescriptor hTableDescriptor)
       throws IOException {
   }
 
   @Override
   public void preRestoreSnapshot(final ObserverContext<MasterCoprocessorEnvironment> ctx,
       final SnapshotDescription snapshot, final HTableDescriptor hTableDescriptor)
       throws IOException {
   }
 
   @Override
   public void postRestoreSnapshot(final ObserverContext<MasterCoprocessorEnvironment> ctx,
       final SnapshotDescription snapshot, final HTableDescriptor hTableDescriptor)
       throws IOException {
   }
 
   @Override
   public void preDeleteSnapshot(final ObserverContext<MasterCoprocessorEnvironment> ctx,
       final SnapshotDescription snapshot) throws IOException {
   }
 
   @Override
   public void postDeleteSnapshot(final ObserverContext<MasterCoprocessorEnvironment> ctx,
       final SnapshotDescription snapshot) throws IOException {
   }
 
   @Override
   public void preGetTableDescriptors(ObserverContext<MasterCoprocessorEnvironment> ctx,
       List<TableName> tableNamesList, List<HTableDescriptor> descriptors)
       throws IOException {
   }
 
   @Override
   public void postGetTableDescriptors(ObserverContext<MasterCoprocessorEnvironment> ctx,
       List<HTableDescriptor> descriptors) throws IOException {
   }
 
 
   @Override
   public void preGetTableDescriptors(ObserverContext<MasterCoprocessorEnvironment> ctx,
       List<TableName> tableNamesList, List<HTableDescriptor> descriptors, String regex)
       throws IOException {
   }
 
   @Override
   public void postGetTableDescriptors(ObserverContext<MasterCoprocessorEnvironment> ctx,
       List<TableName> tableNamesList, List<HTableDescriptor> descriptors,
       String regex) throws IOException {
   }
 
   @Override
   public void preGetTableNames(ObserverContext<MasterCoprocessorEnvironment> ctx,
       List<HTableDescriptor> descriptors, String regex) throws IOException {
   }
 
   @Override
   public void postGetTableNames(ObserverContext<MasterCoprocessorEnvironment> ctx,
       List<HTableDescriptor> descriptors, String regex) throws IOException {
   }
 
   @Override
   public void preTableFlush(ObserverContext<MasterCoprocessorEnvironment> ctx,
       TableName tableName) throws IOException {
   }
 
   @Override
   public void postTableFlush(ObserverContext<MasterCoprocessorEnvironment> ctx,
       TableName tableName) throws IOException {
   }
 
   @Override
   public void preSetUserQuota(final ObserverContext<MasterCoprocessorEnvironment> ctx,
       final String userName, final Quotas quotas) throws IOException {
   }
 
   @Override
   public void postSetUserQuota(final ObserverContext<MasterCoprocessorEnvironment> ctx,
       final String userName, final Quotas quotas) throws IOException {
   }
 
   @Override
   public void preSetUserQuota(final ObserverContext<MasterCoprocessorEnvironment> ctx,
       final String userName, final TableName tableName, final Quotas quotas) throws IOException {
   }
 
   @Override
   public void postSetUserQuota(final ObserverContext<MasterCoprocessorEnvironment> ctx,
       final String userName, final TableName tableName, final Quotas quotas) throws IOException {
   }
 
   @Override
   public void preSetUserQuota(final ObserverContext<MasterCoprocessorEnvironment> ctx,
       final String userName, final String namespace, final Quotas quotas) throws IOException {
   }
 
   @Override
   public void postSetUserQuota(final ObserverContext<MasterCoprocessorEnvironment> ctx,
       final String userName, final String namespace, final Quotas quotas) throws IOException {
   }
 
   @Override
   public void preSetTableQuota(final ObserverContext<MasterCoprocessorEnvironment> ctx,
       final TableName tableName, final Quotas quotas) throws IOException {
   }
 
   @Override
   public void postSetTableQuota(final ObserverContext<MasterCoprocessorEnvironment> ctx,
       final TableName tableName, final Quotas quotas) throws IOException {
   }
 
   @Override
   public void preSetNamespaceQuota(final ObserverContext<MasterCoprocessorEnvironment> ctx,
       final String namespace, final Quotas quotas) throws IOException {
   }
 
   @Override
   public void postSetNamespaceQuota(final ObserverContext<MasterCoprocessorEnvironment> ctx,
       final String namespace, final Quotas quotas) throws IOException {
   }
 
   @Override
   public void preMoveServers(ObserverContext<MasterCoprocessorEnvironment> ctx, Set<Address>
       servers, String targetGroup) throws IOException {
   }
 
   @Override
   public void postMoveServers(ObserverContext<MasterCoprocessorEnvironment> ctx, Set<Address>
       servers, String targetGroup) throws IOException {
   }
 
   @Override
   public void preMoveTables(ObserverContext<MasterCoprocessorEnvironment> ctx, Set<TableName>
       tables, String targetGroup) throws IOException {
   }
 
   @Override
   public void postMoveTables(ObserverContext<MasterCoprocessorEnvironment> ctx,
       Set<TableName> tables, String targetGroup) throws IOException {
   }
 
   @Override
   public void preMoveServersAndTables(ObserverContext<MasterCoprocessorEnvironment> ctx,
       Set<Address> servers, Set<TableName> tables, String targetGroup) throws IOException {
   }
 
   @Override
   public void postMoveServersAndTables(ObserverContext<MasterCoprocessorEnvironment> ctx,
       Set<Address> servers, Set<TableName> tables, String targetGroup) throws IOException {
   }
 
   @Override
   public void preAddRSGroup(ObserverContext<MasterCoprocessorEnvironment> ctx, String name)
       throws IOException {
   }
 
   @Override
   public void postAddRSGroup(ObserverContext<MasterCoprocessorEnvironment> ctx, String name)
       throws IOException {
   }
 
   @Override
   public void preRemoveRSGroup(ObserverContext<MasterCoprocessorEnvironment> ctx, String name)
       throws IOException {
 
   }
 
   @Override
   public void postRemoveRSGroup(ObserverContext<MasterCoprocessorEnvironment> ctx, String name)
       throws IOException {
   }
 
   @Override
   public void preRemoveServers(ObserverContext<MasterCoprocessorEnvironment> ctx,
       Set<Address> servers) throws IOException {
   }
 
   @Override
   public void postRemoveServers(ObserverContext<MasterCoprocessorEnvironment> ctx,
       Set<Address> servers) throws IOException {
   }
 
   @Override
   public void preBalanceRSGroup(ObserverContext<MasterCoprocessorEnvironment> ctx, String groupName)
       throws IOException {
   }
 
   @Override
   public void postBalanceRSGroup(ObserverContext<MasterCoprocessorEnvironment> ctx,
                                  String groupName, boolean balancerRan) throws IOException {
   }
 }