1 files changed, 115 insertions, 0 deletions
diff --git a/src/jaegertracing/thrift/lib/erl/src/thrift_file_transport.erl b/src/jaegertracing/thrift/lib/erl/src/thrift_file_transport.erl
new file mode 100644
index 000000000..071152b63
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+++ b/src/jaegertracing/thrift/lib/erl/src/thrift_file_transport.erl
@@ -0,0 +1,115 @@
+%%
+%% 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_file_transport).
+
+-behaviour(thrift_transport).
+
+%% constructors
+-export([new/1, new/2]).
+%% protocol callbacks
+-export([read/2, read_exact/2, write/2, flush/1, close/1]).
+%% legacy api
+-export([new_reader/1]).
+
+
+-record(t_file, {
+  device,
+  should_close = true,
+  mode = write
+}).
+
+-type state() :: #t_file{}.
+
+
+-spec new(Device::file:io_device()) ->
+  thrift_transport:t_transport().
+
+new(Device) -> new(Device, []).
+
+-spec new(Device::file:io_device(), Opts::list()) ->
+  thrift_transport:t_transport().
+
+%% Device should be opened in raw and binary mode.
+new(Device, Opts) when is_list(Opts) ->
+  State = parse_opts(Opts, #t_file{device = Device}),
+  thrift_transport:new(?MODULE, State).
+
+
+parse_opts([{should_close, Bool}|Rest], State)
+when is_boolean(Bool) ->
+  parse_opts(Rest, State#t_file{should_close = Bool});
+parse_opts([{mode, Mode}|Rest], State)
+when Mode =:= write; Mode =:= read ->
+  parse_opts(Rest, State#t_file{mode = Mode});
+parse_opts([], State) ->
+  State.
+
+
+-include("thrift_transport_behaviour.hrl").
+
+
+read(State = #t_file{device = Device, mode = read}, Len)
+when is_integer(Len), Len >= 0 ->
+  case file:read(Device, Len) of
+    eof -> {State, {error, eof}};
+    {ok, Result} -> {State, {ok, iolist_to_binary(Result)}}
+  end;
+read(State, _) ->
+  {State, {error, write_mode}}.
+
+
+read_exact(State = #t_file{device = Device, mode = read}, Len)
+when is_integer(Len), Len >= 0 ->
+  case file:read(Device, Len) of
+    eof -> {State, {error, eof}};
+    {ok, Result} ->
+      case iolist_size(Result) of
+        X when X < Len -> {State, {error, eof}};
+        _ -> {State, {ok, iolist_to_binary(Result)}}
+      end
+  end;
+read_exact(State, _) ->
+  {State, {error, write_mode}}.
+
+
+write(State = #t_file{device = Device, mode = write}, Data) ->
+  {State, file:write(Device, Data)};
+write(State, _) ->
+  {State, {error, read_mode}}.
+
+
+flush(State = #t_file{device = Device, mode = write}) ->
+  {State, file:sync(Device)}.
+
+
+close(State = #t_file{device = Device, should_close = SC}) ->
+  case SC of
+    true -> {State, file:close(Device)};
+    false -> {State, ok}
+  end.
+
+
+%% legacy api. left for compatibility
+new_reader(Filename) ->
+  case file:open(Filename, [read, binary, {read_ahead, 1024*1024}]) of
+    {ok, IODevice} -> new(IODevice, [{should_close, true}, {mode, read}]);
+    Error -> Error
+  end.
+