1 files changed, 68 insertions, 0 deletions
diff --git a/deps/rabbit_common/src/rabbit_exchange_type.erl b/deps/rabbit_common/src/rabbit_exchange_type.erl
new file mode 100644
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+++ b/deps/rabbit_common/src/rabbit_exchange_type.erl
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+%% This Source Code Form is subject to the terms of the Mozilla Public
+%% License, v. 2.0. If a copy of the MPL was not distributed with this
+%% file, You can obtain one at https://mozilla.org/MPL/2.0/.
+%%
+%% Copyright (c) 2007-2020 VMware, Inc. or its affiliates.  All rights reserved.
+%%
+
+-module(rabbit_exchange_type).
+
+-behaviour(rabbit_registry_class).
+
+-export([added_to_rabbit_registry/2, removed_from_rabbit_registry/1]).
+
+-type(tx() :: 'transaction' | 'none').
+-type(serial() :: pos_integer() | tx()).
+
+-callback description() -> [proplists:property()].
+
+%% Should Rabbit ensure that all binding events that are
+%% delivered to an individual exchange can be serialised? (they
+%% might still be delivered out of order, but there'll be a
+%% serial number).
+-callback serialise_events() -> boolean().
+
+%% The no_return is there so that we can have an "invalid" exchange
+%% type (see rabbit_exchange_type_invalid).
+-callback route(rabbit_types:exchange(), rabbit_types:delivery()) ->
+    rabbit_router:match_result().
+
+%% called BEFORE declaration, to check args etc; may exit with #amqp_error{}
+-callback validate(rabbit_types:exchange()) -> 'ok'.
+
+%% called BEFORE declaration, to check args etc
+-callback validate_binding(rabbit_types:exchange(), rabbit_types:binding()) ->
+    rabbit_types:ok_or_error({'binding_invalid', string(), [any()]}).
+
+%% called after declaration and recovery
+-callback create(tx(), rabbit_types:exchange()) -> 'ok'.
+
+%% called after exchange (auto)deletion.
+-callback delete(tx(), rabbit_types:exchange(), [rabbit_types:binding()]) ->
+    'ok'.
+
+%% called when the policy attached to this exchange changes.
+-callback policy_changed(rabbit_types:exchange(), rabbit_types:exchange()) ->
+    'ok'.
+
+%% called after a binding has been added or recovered
+-callback add_binding(serial(), rabbit_types:exchange(),
+                      rabbit_types:binding()) -> 'ok'.
+
+%% called after bindings have been deleted.
+-callback remove_bindings(serial(), rabbit_types:exchange(),
+                          [rabbit_types:binding()]) -> 'ok'.
+
+%% called when comparing exchanges for equivalence - should return ok or
+%% exit with #amqp_error{}
+-callback assert_args_equivalence(rabbit_types:exchange(),
+                                  rabbit_framing:amqp_table()) ->
+    'ok' | rabbit_types:connection_exit().
+
+%% Exchange type specific info keys
+-callback info(rabbit_types:exchange()) -> [{atom(), term()}].
+
+-callback info(rabbit_types:exchange(), [atom()]) -> [{atom(), term()}].
+
+added_to_rabbit_registry(_Type, _ModuleName) -> ok.
+removed_from_rabbit_registry(_Type) -> ok.