// 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.

syntax = "proto2";

import "mesos/state/state.proto";

package mesos.internal.state;

// Describes an operation used in the log storage implementation.
message Operation {
  enum Type {
    SNAPSHOT = 1;
    DIFF = 3;
    EXPUNGE = 2;
  }

  // Describes a "snapshot" operation.
  message Snapshot {
    required Entry entry = 1;
  }

  // Describes a "diff" operation where the 'value' of the entry is
  // just the diff itself, but the 'uuid' represents the UUID of the
  // entry after applying this diff.
  message Diff {
    required Entry entry = 1;
  }

  // Describes an "expunge" operation.
  message Expunge {
    required string name = 1;
  }

  required Type type = 1;
  optional Snapshot snapshot = 2;
  optional Diff diff = 4;
  optional Expunge expunge = 3;
}