/**
 * 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.
 */

/**
 * These .proto interfaces are private and unstable.
 * Please see http://wiki.apache.org/hadoop/Compatibility
 * for what changes are allowed for a *unstable* .proto interface.
 */

option java_package = "org.apache.hadoop.hdds.protocol.proto";
option java_outer_classname = "StorageContainerLocationProtocolProtos";
option java_generic_services = true;
option java_generate_equals_and_hash = true;
package hadoop.hdds.container;

import "hdds.proto";

/**
  All functions are dispatched as Request/Response under Ozone.
  if you add newe functions, please add them using same pattern.
*/
message ScmContainerLocationRequest {
  required Type cmdType = 1; // Type of the command

  // A string that identifies this command, we generate  Trace ID in Ozone
  // frontend and this allows us to trace that command all over ozone.
  optional string traceID = 2;

  optional ContainerRequestProto containerRequest = 6;
  optional GetContainerRequestProto getContainerRequest = 7;
  optional GetContainerWithPipelineRequestProto getContainerWithPipelineRequest = 8;
  optional SCMListContainerRequestProto scmListContainerRequest = 9;
  optional SCMDeleteContainerRequestProto scmDeleteContainerRequest = 10;
  optional NodeQueryRequestProto nodeQueryRequest = 11;
  optional ObjectStageChangeRequestProto objectStageChangeRequest = 12;
  optional PipelineRequestProto pipelineRequest = 13;
  optional ListPipelineRequestProto listPipelineRequest = 14;
  optional ActivatePipelineRequestProto activatePipelineRequest = 15;
  optional DeactivatePipelineRequestProto deactivatePipelineRequest = 16;
  optional ClosePipelineRequestProto closePipelineRequest = 17;
  optional GetScmInfoRequestProto getScmInfoRequest = 18;
  optional InSafeModeRequestProto inSafeModeRequest = 19;
  optional ForceExitSafeModeRequestProto forceExitSafeModeRequest = 20;
  optional StartReplicationManagerRequestProto startReplicationManagerRequest = 21;
  optional StopReplicationManagerRequestProto stopReplicationManagerRequest = 22;
  optional ReplicationManagerStatusRequestProto seplicationManagerStatusRequest = 23;

}

message ScmContainerLocationResponse {
  required Type cmdType = 1; // Type of the command

  optional string traceID = 2;

  optional bool success = 3 [default = true];

  optional string message = 4;

  required Status status = 5;

  optional ContainerResponseProto containerResponse = 6;
  optional GetContainerResponseProto getContainerResponse = 7;
  optional GetContainerWithPipelineResponseProto getContainerWithPipelineResponse = 8;
  optional SCMListContainerResponseProto scmListContainerResponse = 9;
  optional SCMDeleteContainerResponseProto scmDeleteContainerResponse = 10;
  optional NodeQueryResponseProto nodeQueryResponse = 11;
  optional ObjectStageChangeResponseProto objectStageChangeResponse = 12;
  optional PipelineResponseProto pipelineResponse = 13;
  optional ListPipelineResponseProto listPipelineResponse = 14;
  optional ActivatePipelineResponseProto activatePipelineResponse = 15;
  optional DeactivatePipelineResponseProto deactivatePipelineResponse = 16;
  optional ClosePipelineResponseProto closePipelineResponse = 17;
  optional GetScmInfoResponseProto getScmInfoResponse = 18;
  optional InSafeModeResponseProto inSafeModeResponse = 19;
  optional ForceExitSafeModeResponseProto forceExitSafeModeResponse = 20;
  optional StartReplicationManagerResponseProto startReplicationManagerResponse = 21;
  optional StopReplicationManagerResponseProto stopReplicationManagerResponse = 22;
  optional ReplicationManagerStatusResponseProto replicationManagerStatusResponse = 23;
  enum Status {
    OK = 1;
    CONTAINER_ALREADY_EXISTS = 2;
    CONTAINER_IS_MISSING = 3;
  }
}

enum Type {

  AllocateContainer = 1;
  GetContainer = 2;
  GetContainerWithPipeline = 3;
  ListContainer = 4;
  DeleteContainer = 5;
  QueryNode = 6;
  NotifyObjectStageChange = 7;
  AllocatePipeline = 8;
  ListPipelines = 9;
  ActivatePipeline = 10;
  DeactivatePipeline = 11;
  ClosePipeline = 12;
  GetScmInfo = 13;
  InSafeMode = 14;
  ForceExitSafeMode = 15;
  StartReplicationManager = 16;
  StopReplicationManager = 17;
  GetReplicationManagerStatus = 18;
}

/**
* Request send to SCM asking where the container should be created.
*/
message ContainerRequestProto {
  // Ozone only support replication of either 1 or 3.
  required ReplicationFactor replicationFactor = 2;
  required ReplicationType  replicationType = 3;
  required string owner = 4;
  optional string traceID = 5;
}

/**
 * Reply from SCM indicating that the container.
 */
message ContainerResponseProto {
  enum Error {
    success = 1;
    errorContainerAlreadyExists = 2;
    errorContainerMissing = 3;
  }
  required Error errorCode = 1;
  required ContainerWithPipeline containerWithPipeline = 2;
  optional string errorMessage = 3;
}

message GetContainerRequestProto {
  required int64 containerID = 1;
  optional string traceID = 2;

}

message GetContainerResponseProto {
  required ContainerInfoProto containerInfo = 1;
}

message GetContainerWithPipelineRequestProto {
  required int64 containerID = 1;
  optional string traceID = 2;

}

message GetContainerWithPipelineResponseProto {
  required ContainerWithPipeline containerWithPipeline = 1;
}

message SCMListContainerRequestProto {
  required uint32 count = 1;
  optional uint64 startContainerID = 2;
  optional string traceID = 3;
}

message SCMListContainerResponseProto {
  repeated ContainerInfoProto containers = 1;
}

message SCMDeleteContainerRequestProto {
  required int64 containerID = 1;
  optional string traceID = 2;

}

message SCMDeleteContainerResponseProto {
  // Empty response
}

message ObjectStageChangeRequestProto {
  enum Type {
    container = 1;
    pipeline = 2;
  }
  // delete/copy operation may be added later
  enum Op {
    create = 1;
    close = 2;
  }
  enum Stage {
    begin = 1;
    complete = 2;
  }
  required int64 id = 1;
  required Type type = 2;
  required Op op= 3;
  required Stage stage = 4;
  optional string traceID = 5;
}

message ObjectStageChangeResponseProto {
  // Empty response
}

/*
 NodeQueryRequest sends a request to SCM asking to send a list of nodes that
 match the NodeState that we are requesting.
*/
message NodeQueryRequestProto {
  required NodeState state = 1;
  required QueryScope scope = 2;
  optional string poolName = 3; // if scope is pool, then pool name is needed.
  optional string traceID = 4;
}

message NodeQueryResponseProto {
  repeated Node datanodes = 1;
}

/**
  Request to create a replication pipeline.
 */
message PipelineRequestProto {
  required ReplicationType replicationType = 1;
  required ReplicationFactor replicationFactor = 2;

  // if datanodes are specified then pipelines are created using those
  // datanodes.
  optional NodePool nodePool = 3;
  optional string pipelineID = 4;
  optional string traceID = 5;
}

message  PipelineResponseProto {
  enum Error {
    success = 1;
    errorPipelineAlreadyExists = 2;
  }
  required Error errorCode = 1;
  optional Pipeline  pipeline = 2;
  optional string errorMessage = 3;
}

message ListPipelineRequestProto {
  optional string traceID = 1;
}

message ListPipelineResponseProto {
  repeated Pipeline pipelines = 1;
}

message ActivatePipelineRequestProto {
  required PipelineID pipelineID = 1;
  optional string traceID = 2;
}

message ActivatePipelineResponseProto {
}

message DeactivatePipelineRequestProto {
  required PipelineID pipelineID = 1;
  optional string traceID = 2;
}

message DeactivatePipelineResponseProto {
}

message ClosePipelineRequestProto {
  required PipelineID pipelineID = 1;
  optional string traceID = 2;

}

message ClosePipelineResponseProto {
}

message InSafeModeRequestProto {
  optional string traceID = 1;
}

message InSafeModeResponseProto {
  required bool inSafeMode = 1;
}

message ForceExitSafeModeRequestProto {
  optional string traceID = 1;
}

message ForceExitSafeModeResponseProto {
  required bool exitedSafeMode = 1;
}

message StartReplicationManagerRequestProto {
  optional string traceID = 1;
}

message StartReplicationManagerResponseProto {
}

message StopReplicationManagerRequestProto {
  optional string traceID = 1;
}

message StopReplicationManagerResponseProto {
}

message ReplicationManagerStatusRequestProto {
  optional string traceID = 1;
}

message ReplicationManagerStatusResponseProto {
  required bool isRunning = 1;
}

/**
 * Protocol used from an HDFS node to StorageContainerManager.  See the request
 * and response messages for details of the RPC calls.
 */
service StorageContainerLocationProtocolService {
  rpc submitRequest (ScmContainerLocationRequest) returns (ScmContainerLocationResponse);

}