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%%
%% 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.
%%
-module(thrift_transport).
-export([behaviour_info/1]).
-export([new/2,
write/2,
read/2,
flush/1,
close/1
]).
behaviour_info(callbacks) ->
[{read, 2},
{write, 2},
{flush, 1},
{close, 1}
].
-record(transport, {module, data}).
-ifdef(transport_wrapper_module).
-define(debug_wrap(Transport),
case Transport#transport.module of
?transport_wrapper_module ->
Transport;
_Else ->
{ok, Result} = ?transport_wrapper_module:new(Transport),
Result
end).
-else.
-define(debug_wrap(Transport), Transport).
-endif.
new(Module, Data) when is_atom(Module) ->
Transport0 = #transport{module = Module, data = Data},
Transport1 = ?debug_wrap(Transport0),
{ok, Transport1}.
-spec write(#transport{}, iolist() | binary()) -> {#transport{}, ok | {error, _Reason}}.
write(Transport, Data) ->
Module = Transport#transport.module,
{NewTransData, Result} = Module:write(Transport#transport.data, Data),
{Transport#transport{data = NewTransData}, Result}.
-spec read(#transport{}, non_neg_integer()) -> {#transport{}, {ok, binary()} | {error, _Reason}}.
read(Transport, Len) when is_integer(Len) ->
Module = Transport#transport.module,
{NewTransData, Result} = Module:read(Transport#transport.data, Len),
{Transport#transport{data = NewTransData}, Result}.
-spec flush(#transport{}) -> {#transport{}, ok | {error, _Reason}}.
flush(Transport = #transport{module = Module, data = Data}) ->
{NewTransData, Result} = Module:flush(Data),
{Transport#transport{data = NewTransData}, Result}.
-spec close(#transport{}) -> {#transport{}, ok | {error, _Reason}}.
close(Transport = #transport{module = Module, data = Data}) ->
{NewTransData, Result} = Module:close(Data),
{Transport#transport{data = NewTransData}, Result}.
|
