# Copyright (C) 2018-present MongoDB, Inc.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the Server Side Public License, version 1,
# as published by MongoDB, Inc.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# Server Side Public License for more details.
#
# You should have received a copy of the Server Side Public License
# along with this program. If not, see
# <http://www.mongodb.com/licensing/server-side-public-license>.
#
# As a special exception, the copyright holders give permission to link the
# code of portions of this program with the OpenSSL library under certain
# conditions as described in each individual source file and distribute
# linked combinations including the program with the OpenSSL library. You
# must comply with the Server Side Public License in all respects for
# all of the code used other than as permitted herein. If you modify file(s)
# with this exception, you may extend this exception to your version of the
# file(s), but you are not obligated to do so. If you do not wish to do so,
# delete this exception statement from your version. If you delete this
# exception statement from all source files in the program, then also delete
# it in the license file.
#

# Oplog Entry IDL File

global:
    cpp_namespace: "mongo::repl"

imports:
    - "mongo/idl/basic_types.idl"
    - "mongo/db/logical_session_id.idl"
    - "mongo/db/repl/optime_and_wall_time_base.idl"
    - "mongo/db/repl/replication_types.idl"

enums:
    OpType:
        description: "The type of an operation in the oplog"
        type: string
        values:
            kCommand: "c"
            kInsert: "i"
            kUpdate: "u"
            kDelete: "d"
            kNoop: "n"

structs:
    DurableReplOperation:
        description: "A document that represents an operation in a transaction. Should never be
                      used directly in server code. Instead, create an instance of ReplOperation."
        fields:
            op:
                cpp_name: opType
                type: OpType
                description: "The operation type"
            ns:
                cpp_name: nss
                type: namespacestring
                description: "The namespace on which to apply the operation"
            ui:
                cpp_name: uuid
                type: uuid
                optional: true
                description: "The UUID of the collection"
            o:
                cpp_name: object
                type: object
                description: "The operation applied"
            o2:
                cpp_name: object2
                type: object
                optional: true
                description: "Additional information about the operation applied"
            b:
                cpp_name: upsert
                type: bool
                optional: true
                description: "If true, treats this update operation as an upsert.
                              Used when extracting individual update oplog entries from the oplog
                              entry of an applyOps command that was executed with alwaysUpsert true
                              (the default). Originally added for backwards compatibility with
                              updates from 3.6 and before."
            preImageOpTime:
                type: optime
                optional: true
                description: "The optime of another oplog entry that contains the document
                              before an update/remove was applied."

    OplogEntryBase:
        description: A document in which the server stores an oplog entry.
        inline_chained_structs: true
        chained_structs:
            OperationSessionInfo : OperationSessionInfo
            DurableReplOperation: DurableReplOperation
            OpTimeAndWallTimeBase: OpTimeAndWallTimeBase
        fields:
            h:
                cpp_name: hash
                type: long
                optional: true # Only used for backwards compatibility with 4.0 and before.
                description: "The hash of the oplog entry"
            v:
                cpp_name: version
                type: safeInt64
                default: 2
                description: "The version of the oplog"
            fromMigrate:
                type: bool
                optional: true
                description: "An operation caused by a chunk migration"
            _id:
                type: objectid
                optional: true
                description: "An optional _id field for tests that manually insert oplog entries"
            stmtId:
                cpp_name: statementId
                type: StmtId
                optional: true
                description: "Identifier of the transaction statement which generated this oplog
                              entry"
            prevOpTime:
                cpp_name: prevWriteOpTimeInTransaction
                type: optime
                optional: true # Only for writes that are part of a transaction
                description: "The opTime of the previous write with the same transaction."
            postImageOpTime:
                type: optime
                optional: true
                description: "The optime of another oplog entry that contains the document
                              after an update was applied."