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# Copyright (C) 2018 MongoDB Inc.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License, version 3,
# as published by the Free Software Foundation.
#
# 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
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
# 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 GNU Affero General 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.
# Document source exchange stage IDL file
global:
cpp_namespace: "mongo"
imports:
- "mongo/idl/basic_types.idl"
enums:
ExchangePolicy:
description: "The type of an exchange distribution policy"
type: string
values:
kBroadcast: "broadcast"
kRoundRobin: "roundrobin"
kRange: "range"
kHash: "hash"
structs:
ExchangeSpec:
description: "$exchange operator spec"
fields:
policy:
type: ExchangePolicy
description: A string indicating a policy of how documents are distributed to consumers.
consumers:
type: int
description: Number of consumers.
orderPreserving:
type: bool
default: false
description: A flag indicating documents are merged while preserving the order.
bufferSize:
type: int
default: 16777216
description: The size of exchange buffers.
key:
type: object
default: "BSONObj()"
description: A key used for document distribution to consumers. The same description as sorting/sharding.
boundaries:
type: array<object>
optional: true
description: Range/hash split points.
consumerids:
type: array<int>
optional: true
description: Mapping from a range index to a consumer id.
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