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%% -------------------------------------------------------------------
%%
%% riak_handoff_listener: entry point for TCP-based handoff
%%
%% Copyright (c) 2007-2010 Basho Technologies, Inc. All Rights Reserved.
%%
%% This file is provided 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.
%%
%% -------------------------------------------------------------------
%% @doc entry point for TCP-based handoff
-module(riak_core_handoff_listener).
-behavior(gen_nb_server).
-export([start_link/0]).
-export([init/1, handle_call/3, handle_cast/2, handle_info/2,
terminate/2, code_change/3]).
-export([sock_opts/0, new_connection/2]).
-record(state, {portnum}).
start_link() ->
PortNum = app_helper:get_env(riak_core, handoff_port),
IpAddr = app_helper:get_env(riak_core, handoff_ip),
gen_nb_server:start_link(?MODULE, IpAddr, PortNum, [PortNum]).
init([PortNum]) ->
register(?MODULE, self()),
process_proxy:start_link(riak_kv_handoff_listener, ?MODULE),
{ok, #state{portnum=PortNum}}.
sock_opts() -> [binary, {packet, 4}, {reuseaddr, true}, {backlog, 64}].
handle_call(handoff_port, _From, State=#state{portnum=P}) ->
{reply, {ok, P}, State}.
handle_cast(_Msg, State) -> {noreply, State}.
handle_info(_Info, State) -> {noreply, State}.
terminate(_Reason, _State) -> ok.
code_change(_OldVsn, State, _Extra) -> {ok, State}.
new_connection(Socket, State) ->
{ok, Pid} = riak_core_handoff_receiver:start_link(),
gen_tcp:controlling_process(Socket, Pid),
ok = riak_core_handoff_receiver:set_socket(Pid, Socket),
{ok, State}.
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