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%%%-------------------------------------------------------------------
%%% File: bootstrap_receiver.erl
%%% @author Brad Anderson <brad@cloudant.com>
%%% @copyright 2009 Brad Anderson
%%% @doc
%%%
%%% @end
%%%
%%% @since 2009-09-22 by Brad Anderson
%%%-------------------------------------------------------------------
-module(bootstrap_receiver).
-author('brad@cloudant.com').
-include("../include/config.hrl").
-include("../include/common.hrl").
%% API
-export([start_link/6, loop/6, fetch_shard/5]).
%%====================================================================
%% API
%%====================================================================
%%--------------------------------------------------------------------
%% @spec
%% @doc
%% @end
%%--------------------------------------------------------------------
start_link(FromNode, ToNode, Partition, DbName, Timeout, Manager) ->
Pid = proc_lib:spawn_link(ToNode, bootstrap_receiver, loop,
[FromNode, Partition, DbName, Timeout, Manager,
self()]),
sync_wait(Pid, Timeout).
loop(FromNode, Partition, DbName, Timeout, Manager, Parent) ->
proc_lib:init_ack(Parent, {ok, self()}),
fetch_shard(FromNode, Partition, DbName, Timeout, Manager).
%% @doc run at "ToNode" via spawn_link
fetch_shard(FromNode, Partition, DbName, Timeout, Manager) ->
Directory = couch_config:get("couchdb", "database_dir"),
[_NodeName, Hostname] = string:tokens(atom_to_list(FromNode), "@"),
SrcFile = binary_to_list(partitions:shard_name(Partition, DbName)),
DestFile = showroom_utils:full_filename(Partition, DbName, Directory),
Authn = fetch_authn(),
Port = fetch_port(),
Url = lists:concat(["http://", Authn, Hostname, Port, "/", SrcFile,
".couch"]),
Options = [{save_response_to_file, DestFile},
{inactivity_timeout, Timeout}],
case filelib:ensure_dir(DestFile) of
ok -> ok;
{error, eexist} -> ok; % duh!
Other -> throw(Other)
end,
?LOG_DEBUG("~n"
"Directory: ~p~n"
"Hostname : ~p~n"
"SrcFile : ~p~n"
"DestFile : ~p~n"
"Url : ~p~n"
"Options : ~p~n"
, [Directory, Hostname, SrcFile, DestFile, Url, Options]),
case ibrowse:send_req(Url, [], get, [], Options, infinity) of
{ok, "200", _Headers, Body} ->
?LOG_DEBUG("~nBootstrap ibrowse req Body: ~p~n", [Body]),
Manager ! {receiver_done, FromNode, node(), Partition, DbName,
self()};
Error ->
?LOG_ERROR("~nBootstrap ibrowse req Error: ~p~n", [Error]),
throw(Error)
end.
%%====================================================================
%% Internal functions
%%====================================================================
%% from proc_lib.erl in otp r13b01
sync_wait(Pid, Timeout) ->
receive
{ack, Pid, Return} ->
Return;
{'EXIT', Pid, Reason} ->
{error, Reason}
after Timeout ->
unlink(Pid),
exit(Pid, kill),
flush(Pid),
{error, timeout}
end.
flush(Pid) ->
receive
{'EXIT', Pid, _} ->
true
after 0 ->
true
end.
fetch_authn() ->
User = couch_config:get("shard_moving", "user", ""),
Pass = couch_config:get("shard_moving", "pass", ""),
if
length(User) > 0 andalso length(Pass) > 0 ->
lists:concat([User, ":", Pass, "@"]);
true -> ""
end.
fetch_port() ->
Port = couch_config:get("shard_moving", "port", "8080"),
if
Port =:= "80" -> "";
true -> lists:concat([":", Port])
end.
|
