/
riak_core_vnode_master.erl
244 lines (214 loc) · 9.27 KB
/
riak_core_vnode_master.erl
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
%% -------------------------------------------------------------------
%%
%% riak_vnode_master: dispatch to vnodes
%%
%% 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 dispatch to vnodes
-module(riak_core_vnode_master).
-include("riak_core_vnode.hrl").
-behaviour(gen_server).
-export([start_link/1, start_link/2, start_link/3, get_vnode_pid/2,
start_vnode/2, command/3, command/4, sync_command/3,
coverage/5,
command_return_vnode/4,
sync_command/4,
sync_spawn_command/3, make_request/3,
make_coverage_request/4, all_nodes/1, reg_name/1]).
-export([init/1, handle_call/3, handle_cast/2, handle_info/2,
terminate/2, code_change/3]).
-record(state, {idxtab, sup_name, vnode_mod, legacy}).
-define(DEFAULT_TIMEOUT, 5000).
make_name(VNodeMod,Suffix) -> list_to_atom(atom_to_list(VNodeMod)++Suffix).
reg_name(VNodeMod) -> make_name(VNodeMod, "_master").
%% Given atom 'riak_kv_vnode_master', return 'riak_kv_vnode'.
vmaster_to_vmod(VMaster) ->
L = atom_to_list(VMaster),
list_to_atom(lists:sublist(L,length(L)-7)).
start_link(VNodeMod) ->
start_link(VNodeMod, undefined).
start_link(VNodeMod, LegacyMod) ->
start_link(VNodeMod, LegacyMod, undefined).
start_link(VNodeMod, LegacyMod, Service) ->
RegName = reg_name(VNodeMod),
gen_server:start_link({local, RegName}, ?MODULE,
[Service,VNodeMod,LegacyMod,RegName], []).
start_vnode(Index, VNodeMod) ->
riak_core_vnode_manager:start_vnode(Index, VNodeMod).
get_vnode_pid(Index, VNodeMod) ->
riak_core_vnode_manager:get_vnode_pid(Index, VNodeMod).
command(Preflist, Msg, VMaster) ->
command(Preflist, Msg, ignore, VMaster).
%% Send the command to the preflist given with responses going to Sender
command([], _Msg, _Sender, _VMaster) ->
ok;
command([{Index, Pid}|Rest], Msg, Sender, VMaster) when is_pid(Pid) ->
gen_fsm:send_event(Pid, make_request(Msg, Sender, Index)),
command(Rest, Msg, Sender, VMaster);
command([{Index,Node}|Rest], Msg, Sender, VMaster) ->
proxy_cast({VMaster, Node}, make_request(Msg, Sender, Index)),
command(Rest, Msg, Sender, VMaster);
%% Send the command to an individual Index/Node combination
command({Index, Pid}, Msg, Sender, _VMaster) when is_pid(Pid) ->
gen_fsm:send_event(Pid, make_request(Msg, Sender, Index));
command({Index,Node}, Msg, Sender, VMaster) ->
proxy_cast({VMaster, Node}, make_request(Msg, Sender, Index)).
%% Send a command to a covering set of vnodes
coverage(Msg, CoverageVNodes, Keyspaces, {Type, Ref, From}, VMaster)
when is_list(CoverageVNodes) ->
[proxy_cast({VMaster, Node},
make_coverage_request(Msg,
Keyspaces,
{Type, {Ref, {Index, Node}}, From},
Index)) ||
{Index, Node} <- CoverageVNodes];
coverage(Msg, {Index, Node}, Keyspaces, Sender, VMaster) ->
proxy_cast({VMaster, Node},
make_coverage_request(Msg, Keyspaces, Sender, Index)).
%% Send the command to an individual Index/Node combination, but also
%% return the pid for the vnode handling the request, as `{ok,
%% VnodePid}'.
command_return_vnode({Index,Node}, Msg, Sender, VMaster) ->
Req = make_request(Msg, Sender, Index),
case riak_core_capability:get({riak_core, vnode_routing}, legacy) of
legacy ->
gen_server:call({VMaster, Node}, {return_vnode, Req});
proxy ->
Mod = vmaster_to_vmod(VMaster),
riak_core_vnode_proxy:command_return_vnode({Mod,Index,Node}, Req)
end.
%% Send a synchronous command to an individual Index/Node combination.
%% Will not return until the vnode has returned
sync_command(IndexNode, Msg, VMaster) ->
sync_command(IndexNode, Msg, VMaster, ?DEFAULT_TIMEOUT).
sync_command({Index,Node}, Msg, VMaster, Timeout) ->
%% Issue the call to the master, it will update the Sender with
%% the From for handle_call so that the {reply} return gets
%% sent here.
gen_server:call({VMaster, Node},
make_request(Msg, {server, undefined, undefined}, Index), Timeout).
%% Send a synchronous spawned command to an individual Index/Node combination.
%% Will not return until the vnode has returned, but the vnode_master will
%% continue to handle requests.
sync_spawn_command({Index,Node}, Msg, VMaster) ->
gen_server:call({VMaster, Node},
{spawn, make_request(Msg, {server, undefined, undefined}, Index)},
infinity).
%% Make a request record - exported for use by legacy modules
-spec make_request(vnode_req(), sender(), partition()) -> #riak_vnode_req_v1{}.
make_request(Request, Sender, Index) ->
#riak_vnode_req_v1{
index=Index,
sender=Sender,
request=Request}.
%% Make a request record - exported for use by legacy modules
-spec make_coverage_request(vnode_req(), [{partition(), [partition()]}], sender(), partition()) -> #riak_coverage_req_v1{}.
make_coverage_request(Request, KeySpaces, Sender, Index) ->
#riak_coverage_req_v1{index=Index,
keyspaces=KeySpaces,
sender=Sender,
request=Request}.
%% Request a list of Pids for all vnodes
%% @deprecated
%% Provided for compatibility with older vnode master API. New code should
%% use riak_core_vnode_manager:all_vnode/1 which returns a mod/index/pid
%% list rather than just a pid list.
all_nodes(VNodeMod) ->
VNodes = riak_core_vnode_manager:all_vnodes(VNodeMod),
[Pid || {_Mod, _Idx, Pid} <- VNodes].
%% @private
init([Service, VNodeMod, LegacyMod, _RegName]) ->
gen_server:cast(self(), {wait_for_service, Service}),
{ok, #state{idxtab=undefined,
vnode_mod=VNodeMod,
legacy=LegacyMod}}.
proxy_cast({VMaster, Node}, Req) ->
case riak_core_capability:get({riak_core, vnode_routing}, legacy) of
legacy ->
gen_server:cast({VMaster, Node}, Req);
proxy ->
do_proxy_cast({VMaster, Node}, Req)
end.
do_proxy_cast({VMaster, Node}, Req=?VNODE_REQ{index=Idx}) ->
Mod = vmaster_to_vmod(VMaster),
Proxy = riak_core_vnode_proxy:reg_name(Mod, Idx, Node),
gen_fsm:send_event(Proxy, Req),
ok;
do_proxy_cast({VMaster, Node}, Req=?COVERAGE_REQ{index=Idx}) ->
Mod = vmaster_to_vmod(VMaster),
Proxy = riak_core_vnode_proxy:reg_name(Mod, Idx, Node),
gen_fsm:send_event(Proxy, Req),
ok;
do_proxy_cast({VMaster, Node}, Other) ->
gen_server:cast({VMaster, Node}, Other).
handle_cast({wait_for_service, Service}, State) ->
case Service of
undefined ->
ok;
_ ->
lager:debug("Waiting for service: ~p", [Service]),
riak_core:wait_for_service(Service)
end,
{noreply, State};
handle_cast(Req=?VNODE_REQ{index=Idx}, State=#state{vnode_mod=Mod}) ->
Proxy = riak_core_vnode_proxy:reg_name(Mod, Idx),
gen_fsm:send_event(Proxy, Req),
{noreply, State};
handle_cast(Req=?COVERAGE_REQ{index=Idx}, State=#state{vnode_mod=Mod}) ->
Proxy = riak_core_vnode_proxy:reg_name(Mod, Idx),
gen_fsm:send_event(Proxy, Req),
{noreply, State};
handle_cast(Other, State=#state{legacy=Legacy}) when Legacy =/= undefined ->
case catch Legacy:rewrite_cast(Other) of
{ok, ?VNODE_REQ{}=Req} ->
handle_cast(Req, State);
_ ->
{noreply, State}
end.
handle_call({return_vnode, Req=?VNODE_REQ{index=Idx}}, _From,
State=#state{vnode_mod=Mod}) ->
{ok, Pid} =
riak_core_vnode_proxy:command_return_vnode({Mod,Idx,node()}, Req),
{reply, {ok, Pid}, State};
handle_call(Req=?VNODE_REQ{index=Idx, sender={server, undefined, undefined}},
From, State=#state{vnode_mod=Mod}) ->
Proxy = riak_core_vnode_proxy:reg_name(Mod, Idx),
gen_fsm:send_event(Proxy, Req?VNODE_REQ{sender={server, undefined, From}}),
{noreply, State};
handle_call({spawn,
Req=?VNODE_REQ{index=Idx, sender={server, undefined, undefined}}},
From, State=#state{vnode_mod=Mod}) ->
Proxy = riak_core_vnode_proxy:reg_name(Mod, Idx),
Sender = {server, undefined, From},
spawn_link(
fun() -> gen_fsm:send_all_state_event(Proxy, Req?VNODE_REQ{sender=Sender}) end),
{noreply, State};
handle_call(Other, From, State=#state{legacy=Legacy}) when Legacy =/= undefined ->
case catch Legacy:rewrite_call(Other, From) of
{ok, ?VNODE_REQ{}=Req} ->
handle_call(Req, From, State);
_ ->
{noreply, State}
end.
handle_info(_Info, State) ->
{noreply, State}.
%% @private
terminate(_Reason, _State) ->
ok.
%% @private
code_change(_OldVsn, State, _Extra) -> {ok, State}.