/**
 * 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.
 */

// This file contains protocol buffers that are used for RegionAdmin service.

option java_package = "org.apache.hadoop.hbase.protobuf.generated";
option java_outer_classname = "RegionAdminProtos";
option java_generic_services = true;
option java_generate_equals_and_hash = true;
option optimize_for = SPEED;

import "hbase.proto";

message GetRegionInfoRequest {
  required RegionSpecifier region = 1;
}

message GetRegionInfoResponse {
  required RegionInfo regionInfo = 1;
}

/**
 * Get a list of store files for a set of column families in a particular region.
 * If no column family is specified, get the store files for all column families.
 */
message GetStoreFileListRequest {
  required RegionSpecifier region = 1;
  repeated bytes columnFamily = 2;
}

message GetStoreFileListResponse {
  repeated string storeFile = 1;
}

message GetOnlineRegionRequest {
}

message GetOnlineRegionResponse {
  repeated RegionInfo regionInfo = 1;
}

message OpenRegionRequest {
  repeated RegionSpecifier region = 1;
  optional uint32 versionOfOfflineNode = 2;
}

message OpenRegionResponse {
  repeated RegionOpeningState openingState = 1;

  enum RegionOpeningState {
    OPENED = 0;
    ALREADY_OPENED = 1;
    FAILED_OPENING = 2;
  }
}

/**
 * Closes the specified region and will use or not use ZK during the close
 * according to the specified flag.
 */
message CloseRegionRequest {
  required RegionSpecifier region = 1;
  optional uint32 versionOfClosingNode = 2;
  optional bool transitionInZK = 3 [default = true];
}

message CloseRegionResponse {
  required bool closed = 1;
}

/**
 * Flushes the MemStore of the specified region.
 * <p>
 * This method is synchronous.
 */
message FlushRegionRequest {
  required RegionSpecifier region = 1;
  optional uint64 ifOlderThanTs = 2;
}

message FlushRegionResponse {
  required uint64 lastFlushTime = 1;
  optional bool flushed = 2;
}

/**
 * Splits the specified region.
 * <p>
 * This method currently flushes the region and then forces a compaction which
 * will then trigger a split.  The flush is done synchronously but the
 * compaction is asynchronous.
 */
message SplitRegionRequest {
  required RegionSpecifier region = 1;
  optional bytes splitPoint = 2;
}

message SplitRegionResponse {
}

/**
 * Compacts the specified region.  Performs a major compaction if specified.
 * <p>
 * This method is asynchronous.
 */
message CompactRegionRequest {
  required RegionSpecifier region = 1;
  optional bool major = 2;
}

message CompactRegionResponse {
}

message UUID {
  required uint64 leastSigBits = 1;
  required uint64 mostSigBits = 2;
}

// Protocol buffer version of HLog
message WALEntry {
  required WALKey walKey = 1;
  required WALEdit edit = 2;

  // Protocol buffer version of HLogKey
  message WALKey {
    required bytes encodedRegionName = 1;
    required bytes tableName = 2;
    required uint64 logSequenceNumber = 3;
    required uint64 writeTime = 4;
    optional UUID clusterId = 5;
  }

  message WALEdit {
    repeated KeyValue keyValue = 1;
    repeated FamilyScope familyScope = 2;

    enum ScopeType {
      REPLICATION_SCOPE_LOCAL = 0;
      REPLICATION_SCOPE_GLOBAL = 1;
    }

    message FamilyScope {
      required bytes family = 1;
      required ScopeType scopeType = 2;
    }
  }
}

/**
 * Replicates the given entries. The guarantee is that the given entries
 * will be durable on the slave cluster if this method returns without
 * any exception.
 * hbase.replication has to be set to true for this to work.
 */
message ReplicateWALEntryRequest {
  repeated WALEntry walEntry = 1;
}

message ReplicateWALEntryResponse {
}

// Replacement for rollHLogWriter in HRegionInterface 
message RollWALWriterRequest {
}

message RollWALWriterResponse {
  // A list of encoded name of regions to flush
  repeated bytes regionToFlush = 1;
}

message StopServerRequest {
  required string reason = 1;
}

message StopServerResponse {
}

message GetServerInfoRequest {
}

message GetServerInfoResponse {
  required ServerName serverName = 1;
}

service RegionAdminService {
  rpc getRegionInfo(GetRegionInfoRequest)
    returns(GetRegionInfoResponse);

  rpc getStoreFileList(GetStoreFileListRequest)
    returns(GetStoreFileListResponse);

  rpc getOnlineRegion(GetOnlineRegionRequest)
    returns(GetOnlineRegionResponse);

  rpc openRegion(OpenRegionRequest)
    returns(OpenRegionResponse);

  rpc closeRegion(CloseRegionRequest)
    returns(CloseRegionResponse);

  rpc flushRegion(FlushRegionRequest)
    returns(FlushRegionResponse);

  rpc splitRegion(SplitRegionRequest)
    returns(SplitRegionResponse);

  rpc compactRegion(CompactRegionRequest)
    returns(CompactRegionResponse);

  rpc replicateWALEntry(ReplicateWALEntryRequest)
    returns(ReplicateWALEntryResponse);

  rpc rollWALWriter(RollWALWriterRequest)
    returns(RollWALWriterResponse);

  rpc getServerInfo(GetServerInfoRequest)
    returns(GetServerInfoResponse);

  rpc stopServer(StopServerRequest)
    returns(StopServerResponse);
}