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couch_compactor_fsm.erl
1021 lines (925 loc) · 42.6 KB
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couch_compactor_fsm.erl
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%%%-------------------------------------------------------------------
%%% @copyright (C) 2012, 2600Hz
%%% @doc
%%%
%%% @end
%%% @contributors
%%% James Aimonetti
%%%-------------------------------------------------------------------
-module(couch_compactor_fsm).
-behaviour(gen_fsm).
%% API
-export([start_link/0
,compact/0
,compact_node/1
,compact_db/1
,compact_db/2
,status/0
,is_compactor_running/0
,cancel_current_job/0
,cancel_all_jobs/0
,start_auto_compaction/0
,stop_auto_compaction/0
,compact_automatically/0
,compact_automatically/1
]).
%% Internal
-export([compact_shard/3]).
%% gen_fsm callbacks
-export([init/1
,handle_event/3
,handle_sync_event/4
,handle_info/3
,terminate/3
,code_change/4
%% state functions
,ready/2, ready/3 % FSM is 'ready' to compact something
,compact/2, compact/3 % FSM is compacting all nodes
,wait/2, wait/3 % FSM is waiting to compact the next thing
]).
-include("wh_couch.hrl").
-include_lib("whistle/include/wh_databases.hrl").
-define(SLEEP_BETWEEN_COMPACTION
,whapps_config:get_integer(?CONFIG_CAT, <<"sleep_between_compaction">>, 60000)
).
-define(SLEEP_BETWEEN_POLL
,whapps_config:get_integer(?CONFIG_CAT, <<"sleep_between_poll">>, 1000)
).
-define(MAX_COMPACTING_SHARDS
,whapps_config:get_integer(?CONFIG_CAT, <<"max_compacting_shards">>, 10)
).
-define(MAX_COMPACTING_VIEWS
,whapps_config:get_integer(?CONFIG_CAT, <<"max_compacting_views">>, 5)
).
-define(SLEEP_BETWEEN_VIEWS
,whapps_config:get_integer(?CONFIG_CAT, <<"max_compacting_views">>, 2000)
).
-define(MAX_WAIT_FOR_COMPACTION_PID
,whapps_config:get_integer(?CONFIG_CAT, <<"max_compacting_views">>, 360000)
). % five minutes
-define(SERVER, ?MODULE).
-type req_job() :: 'req_compact' |
{'req_compact_node', ne_binary()} |
{'req_compact_db', ne_binary()} |
{'req_compact_db', ne_binary(), ne_binary()}.
-type not_compacting() :: {'error', 'compactor_down'}.
-record(state, {
nodes :: ne_binaries()
,dbs :: ne_binaries()
,wait_ref :: reference()
,shards_pid_ref :: {pid(), reference()} %% proc/monitor for pid of shard compactor
,next_compaction_msg :: tuple() | atom() %% what to send once shards_pid_ref is done
,current_node :: ne_binary()
,current_db :: ne_binary()
,conn :: #server{}
,admin_conn :: #server{}
%% [ {Job, Pid, Ref},...]
,queued_jobs = queue:new() :: queue()
,current_job_pid :: pid()
,current_job_ref :: reference()
}).
%%%===================================================================
%%% API
%%%===================================================================
%%--------------------------------------------------------------------
%% @doc
%% Creates a gen_fsm 'process' which calls Module:init/1 to
%% initialize. To ensure a synchronized start-up procedure, this
%% function does not return until Module:init/1 has returned.
%%
%% @spec start_link() -> {'ok', Pid} | ignore | {'error', Error}
%% @end
%%--------------------------------------------------------------------
start_link() ->
gen_fsm:start_link({local, ?SERVER}, ?MODULE, [], []).
-spec compact() -> {'queued', reference()} | not_compacting().
compact() ->
case is_compactor_running() of
'true' -> gen_fsm:sync_send_event(?SERVER, req_compact);
'false' -> {'error', compactor_down}
end.
-spec compact_node(ne_binary()) -> {'queued', reference()} | not_compacting().
compact_node(Node) ->
case is_compactor_running() of
'true' -> gen_fsm:sync_send_event(?SERVER, {req_compact_node, Node});
'false' -> {'error', 'compactor_down'}
end.
-spec compact_db(ne_binary()) -> {'queued', reference()} | not_compacting().
compact_db(Db) ->
case is_compactor_running() of
'true' -> gen_fsm:sync_send_event(?SERVER, {req_compact_db, Db});
'false' -> {'error', 'compactor_down'}
end.
-spec compact_db(ne_binary(), ne_binary()) -> {'queued', reference()} | not_compacting().
compact_db(Node, Db) ->
case is_compactor_running() of
'true' -> gen_fsm:sync_send_event(?SERVER, {req_compact_db, Node, Db});
'false' -> {'error', 'compactor_down'}
end.
-spec status() -> {'ok', 'ready' | 'not_running' | wh_proplist()}.
status() ->
case is_compactor_running() of
'true' -> gen_fsm:sync_send_event(?SERVER, status);
'false' -> {'ok', not_running}
end.
-spec cancel_current_job() -> {'ok', 'job_cancelled'} |
{'error', 'no_job_running'} |
not_compacting().
cancel_current_job() ->
case is_compactor_running() of
'true' -> gen_fsm:sync_send_event(?SERVER, cancel_current_job);
'false' -> {'error', 'compactor_down'}
end.
-spec cancel_all_jobs() -> {'ok', 'jobs_cancelled'} | not_compacting().
cancel_all_jobs() ->
case is_compactor_running() of
'true' -> gen_fsm:sync_send_event(?SERVER, cancel_all_jobs);
'false' -> {'error', 'compactor_down'}
end.
-spec start_auto_compaction() -> {'ok', 'already_started'} |
{'queued', reference()} |
not_compacting().
start_auto_compaction() ->
case is_compactor_running() of
'true' ->
case compact_automatically() of
'true' -> {'ok', already_started};
'false' ->
_ = compact_automatically(true),
compact()
end;
'false' -> {'error', 'compactor_down'}
end.
-spec stop_auto_compaction() -> {'ok', 'updated' | 'already_stopped'} |
not_compacting().
stop_auto_compaction() ->
case is_compactor_running() of
'true' ->
case compact_automatically() of
'false' -> {'ok', already_stopped};
'true' ->
_ = compact_automatically(false),
{'ok', updated}
end;
'false' -> {'error', 'compactor_down'}
end.
-spec is_compactor_running() -> boolean().
is_compactor_running() ->
is_pid(whistle_couch_sup:compactor_pid()).
%%%===================================================================
%%% gen_fsm callbacks
%%%===================================================================
%%--------------------------------------------------------------------
%% @private
%% @doc
%% Whenever a gen_fsm is started using gen_fsm:start/[3,4] or
%% gen_fsm:start_link/[3,4], this function is called by the new
%% 'process' to initialize.
%%
%% @spec init(Args) -> {'ok', StateName, State} |
%% {'ok', StateName, State, Timeout} |
%% ignore |
%% {stop, StopReason}
%% @end
%%--------------------------------------------------------------------
init([]) ->
_ = random:seed(erlang:now()),
put('callid', ?MODULE),
self() ! '$maybe_start_auto_compaction_job',
{'ok', 'ready', #state{conn='undefined'
,admin_conn='undefined'
}}.
%%--------------------------------------------------------------------
ready('compact', State) ->
gen_fsm:send_event(self(), 'compact'),
{'next_state', 'compact', State#state{nodes=get_nodes()
,conn='undefined'
,admin_conn='undefined'
,current_node='undefined'
,current_db='undefined'
}};
ready({'compact_node', N}, State) ->
gen_fsm:send_event(self(), 'compact'),
{'next_state', 'compact', State#state{nodes=[N]
,conn='undefined'
,admin_conn='undefined'
,current_node=N
,current_db='undefined'
}};
ready({'compact_db', D}, State) ->
[N|Ns] = get_nodes(),
gen_fsm:send_event(self(), {'compact_db', N, D}),
{'next_state', 'compact', State#state{nodes=Ns
,dbs=[D]
,conn='undefined'
,admin_conn='undefined'
,current_node=N
,current_db=D
}};
ready({'compact_db', N, D}, State) ->
gen_fsm:send_event(self(), {'compact_db', N, D}),
{'next_state', 'compact', State#state{nodes=[]
,dbs=[]
,conn='undefined'
,admin_conn='undefined'
,current_node=N
,current_db=D
}};
ready('next_job', #state{queued_jobs=Jobs}=State) ->
case queue:out(Jobs) of
{'empty', _} ->
maybe_start_auto_compaction_job(),
{'next_state', 'ready', State#state{current_job_pid='undefined'
,current_job_ref='undefined'
}};
{{value, {Job, P, Ref}}, Jobs1} ->
maybe_send_update(P, Ref, job_starting),
gen_fsm:send_event(self(), Job),
lager:debug("starting queued job for ~p:~p: ~p", [P, Ref, Job]),
{'next_state', 'ready', State#state{queued_jobs=Jobs1
,current_job_pid=P
,current_job_ref=Ref
}}
end;
ready(_Msg, State) ->
lager:debug("unhandled msg: ~p", [_Msg]),
{'next_state', 'ready', State}.
ready(status, _, #state{}=State) ->
{'reply', {'ok', 'ready'}, 'ready', State};
ready(cancel_current_job, _, State) ->
{'reply', {'error', no_job_running}, 'ready', State};
ready(cancel_all_jobs, _, #state{queued_jobs=Jobs}=State) ->
_ = [ maybe_send_update(P, Ref, job_cancelled) || {_, P, Ref} <- queue:to_list(Jobs)],
{'reply', {'ok', jobs_cancelled}, 'ready', State#state{queued_jobs=queue:new()
,next_compaction_msg='undefined'
,shards_pid_ref='undefined'
,wait_ref='undefined'
}};
ready(Msg, {NewP, _}, #state{queued_jobs=Jobs}=State) ->
case queue:out(Jobs) of
{empty, _} ->
{Ref, Jobs1} = queue_job(Msg, NewP, Jobs),
gen_fsm:send_event(self(), next_job),
{'reply', {queued, Ref}, 'ready', State#state{queued_jobs=Jobs1}};
{{value, {Job, P, Ref}}, Jobs1} ->
maybe_send_update(P, Ref, job_starting),
gen_fsm:send_event(self(), Job),
lager:debug("starting queued job for ~p:~p: ~p", [P, Ref, Job]),
{Ref2, Jobs2} = queue_job(Msg, NewP, Jobs1),
{'reply', {queued, Ref2}, 'ready', State#state{queued_jobs=Jobs2
,current_job_pid=P
,current_job_ref=Ref
}}
end.
-spec queue_job(req_job(), pid(), queue()) -> {reference(), queue()}.
queue_job(req_compact, P, Jobs) ->
Ref = erlang:make_ref(),
{Ref, queue:in({compact, P, Ref}, Jobs)};
queue_job({req_compact_node, Node}, P, Jobs) ->
Ref = erlang:make_ref(),
{Ref, queue:in({{compact_node, Node}, P, Ref}, Jobs)};
queue_job({req_compact_db, Db}, P, Jobs) ->
Ref = erlang:make_ref(),
{Ref, queue:in({{compact_db, Db}, P, Ref}, Jobs)};
queue_job({req_compact_db, Node, Db}, P, Jobs) ->
Ref = erlang:make_ref(),
{Ref, queue:in({{compact_db, Node, Db}, P, Ref}, Jobs)}.
%%--------------------------------------------------------------------
compact({compact, N}, #state{conn='undefined'
,admin_conn='undefined'
,nodes=[]
,current_job_pid=P
,current_job_ref=Ref
}=State) ->
Cookie = wh_couch_connections:get_node_cookie(),
try get_node_connections(N, Cookie) of
{Conn, AdminConn} ->
gen_fsm:send_event(self(), {compact, N}),
{'next_state', compact, State#state{conn=Conn
,admin_conn=AdminConn
,current_node=N
}}
catch
_:{'error',{conn_failed,{'error',etimedout}}} ->
lager:debug("failed to connect to node ~s: timed out", [N]),
maybe_send_update(P, Ref, job_finished),
gen_fsm:send_event(self(), next_job),
{'next_state', 'ready', State#state{conn='undefined'
,admin_conn='undefined'
,current_node='undefined'
,current_job_pid='undefined'
,current_job_ref='undefined'
}}
end;
compact({compact, N}=Msg, #state{conn='undefined'
,admin_conn='undefined'
,nodes=[Node|Ns]
}=State) ->
Cookie = wh_couch_connections:get_node_cookie(),
try get_node_connections(N, Cookie) of
{Conn, AdminConn} ->
gen_fsm:send_event(self(), Msg),
{'next_state', compact, State#state{conn=Conn
,admin_conn=AdminConn
,current_node=N
}}
catch
_:{'error',{conn_failed,{'error',etimedout}}} ->
lager:debug("failed to connect to node ~s: timed out", [N]),
gen_fsm:send_event(self(), {compact, Node}),
{'next_state', compact, State#state{nodes=Ns
,current_node='undefined'
}}
end;
compact({compact_db, N, D}=Msg, #state{conn='undefined'
,admin_conn='undefined'
,nodes=[]
,current_job_pid=P
,current_job_ref=Ref
}=State) ->
Cookie = wh_couch_connections:get_node_cookie(),
try get_node_connections(N, Cookie) of
{Conn, AdminConn} ->
gen_fsm:send_event(self(), Msg),
{'next_state', compact, State#state{conn=Conn
,admin_conn=AdminConn
,current_node=N
,current_db=D
}}
catch
_:{'error',{conn_failed,{'error',etimedout}}} ->
lager:debug("failed to connect to node ~s: timed out", [N]),
maybe_send_update(P, Ref, job_finished),
gen_fsm:send_event(self(), next_job),
{'next_state', 'ready', State#state{conn='undefined'
,admin_conn='undefined'
,current_node='undefined'
,current_db='undefined'
,current_job_pid='undefined'
,current_job_ref='undefined'
}}
end;
compact({compact_db, N, D}=Msg, #state{conn='undefined'
,admin_conn='undefined'
,nodes=[Node|Ns]
}=State) ->
Cookie = wh_couch_connections:get_node_cookie(),
try get_node_connections(N, Cookie) of
{Conn, AdminConn} ->
gen_fsm:send_event(self(), Msg),
{'next_state', compact, State#state{conn=Conn
,admin_conn=AdminConn
,current_node=N
,current_db=D
}}
catch
_:{'error',{conn_failed,{'error',etimedout}}} ->
lager:debug("failed to connect to node ~s: timed out", [N]),
gen_fsm:send_event(self(), {compact_db, Node, D}),
{'next_state', compact, State#state{nodes=Ns
,current_node=Node
,current_db=D
}}
end;
compact(compact, #state{nodes=[]
,current_job_pid=P
,current_job_ref=Ref
}=State) ->
lager:debug("no nodes to compact"),
maybe_send_update(P, Ref, job_finished),
gen_fsm:send_event(self(), next_job),
{'next_state', 'ready', State#state{conn='undefined'
,admin_conn='undefined'
,current_node='undefined'
,current_db='undefined'
,current_job_pid='undefined'
,current_job_ref='undefined'
}};
compact(compact, #state{nodes=[N|Ns]}=State) ->
lager:debug("compact node ~s", [N]),
gen_fsm:send_event(self(), {compact, N}),
{'next_state', compact, State#state{nodes=Ns}};
compact({compact, N}, #state{admin_conn=AdminConn}=State) ->
lager:debug("compacting node ~s", [N]),
{'ok', DBs} = node_dbs(AdminConn),
[D|Ds] = shuffle(DBs),
gen_fsm:send_event(self(), {compact, N, D}),
{'next_state', compact, State#state{dbs=Ds, current_db=D}};
compact({compact, N, D}, #state{conn=Conn
,admin_conn=AdminConn
,dbs=[]
}=State) ->
case couch_util:db_exists(Conn, encode_db(D)) of
'false' ->
lager:debug("db ~s not found on ~s", [D, N]),
gen_fsm:send_event(self(), compact),
{'next_state', compact, State#state{current_db='undefined'}};
'true' ->
lager:debug("compacting ~s on ~s", [D, N]),
Ss = db_shards(AdminConn, N, D),
DDs = db_design_docs(Conn, D),
gen_fsm:send_event(self(), {compact, N, D, Ss, DDs}),
{'next_state', compact, State#state{current_db=D}}
end;
compact({compact, N, D}, #state{conn=Conn
,admin_conn=AdminConn
,dbs=[Db|Dbs]
}=State) ->
case couch_util:db_exists(Conn, encode_db(D)) of
'false' ->
lager:debug("db ~s not found on ~s", [D, N]),
gen_fsm:send_event(self(), {compact, N, Db}),
{'next_state', compact, State#state{dbs=Dbs
,current_db=Db
}};
'true' ->
lager:debug("compacting ~s on ~s", [D, N]),
Ss = db_shards(AdminConn, N, D),
DDs = db_design_docs(Conn, D),
gen_fsm:send_event(self(), {compact, N, D, Ss, DDs}),
{'next_state', compact, State#state{current_db=D}}
end;
compact({compact_db, N, D}, #state{conn=Conn
,admin_conn=AdminConn
,nodes=[]
,current_job_pid=P
,current_job_ref=Ref
}=State) ->
case couch_util:db_exists(Conn, encode_db(D)) of
'false' ->
lager:debug("db ~s not found on ~s", [D, N]),
maybe_send_update(P, Ref, job_finished),
gen_fsm:send_event(self(), next_job),
{'next_state', 'ready', State#state{conn='undefined'
,admin_conn='undefined'
,current_node='undefined'
,current_db='undefined'
,current_job_pid='undefined'
,current_job_ref='undefined'
}};
'true' ->
lager:debug("compacting ~s on ~s", [D, N]),
Ss = db_shards(AdminConn, N, D),
DDs = db_design_docs(Conn, D),
gen_fsm:send_event(self(), {compact_db, N, D, Ss, DDs}),
{'next_state', compact, State#state{current_node=N
,current_db=N
}}
end;
compact({compact_db, N, D}, #state{conn=Conn
,admin_conn=AdminConn
,nodes=[Node|Ns]
}=State) ->
case couch_util:db_exists(Conn, encode_db(D)) of
'false' ->
lager:debug("db ~s not found on ~s", [D, N]),
gen_fsm:send_event(self(), {compact_db, Node, D}),
{'next_state', compact, State#state{nodes=Ns
,current_node=Node
,current_db=D
}};
'true' ->
lager:debug("compacting ~s on ~s", [D, N]),
Ss = db_shards(AdminConn, N, D),
DDs = db_design_docs(Conn, D),
gen_fsm:send_event(self(), {compact_db, N, D, Ss, DDs}),
{'next_state', compact, State#state{current_node=N
,current_db=D
}}
end;
compact({compact, N, D, [], _}, #state{dbs=[]}=State) ->
lager:debug("no shards to compact for ~s on ~s", [D, N]),
gen_fsm:send_event(self(), compact),
{'next_state', compact, State};
compact({compact, N, D, [], _}, #state{dbs=[Db|Dbs]}=State) ->
lager:debug("no shards to compact for ~s on ~s", [D, N]),
gen_fsm:send_event(self(), {compact, N, Db}),
{'next_state', compact, State#state{dbs=Dbs}};
compact({compact, N, D, Ss, DDs}, #state{admin_conn=AdminConn
,dbs=[]
}=State) ->
try lists:split(?MAX_COMPACTING_SHARDS, Ss) of
{Compact, Shards} ->
ShardsPidRef = compact_shards(AdminConn, Compact, DDs),
{'next_state', compact, State#state{shards_pid_ref=ShardsPidRef
,next_compaction_msg={compact, N, D, Shards, DDs}
}}
catch
'error':'badarg' ->
ShardsPidRef = compact_shards(AdminConn, Ss, DDs),
{'next_state', compact, State#state{shards_pid_ref=ShardsPidRef
,next_compaction_msg='compact'
}}
end;
compact({compact, N, D, Ss, DDs}, #state{admin_conn=AdminConn
,dbs=[Db|Dbs]
}=State) ->
try lists:split(?MAX_COMPACTING_SHARDS, Ss) of
{Compact, Shards} ->
ShardsPidRef = compact_shards(AdminConn, Compact, DDs),
{'next_state', compact, State#state{shards_pid_ref=ShardsPidRef
,next_compaction_msg={compact, N, D, Shards, DDs}
}}
catch
'error':'badarg' ->
ShardsPidRef = compact_shards(AdminConn, Ss, DDs),
{'next_state', compact, State#state{dbs=Dbs
,shards_pid_ref=ShardsPidRef
,next_compaction_msg={compact, N, Db}
}}
end;
compact({compact_db, N, D, [], _}, #state{nodes=[]
,current_job_pid=P
,current_job_ref=Ref
}=State) ->
lager:debug("no shards to compact for ~s on ~s", [D, N]),
maybe_send_update(P, Ref, job_finished),
gen_fsm:send_event(self(), next_job),
{'next_state', 'ready', State#state{conn='undefined'
,admin_conn='undefined'
,current_node='undefined'
,current_db='undefined'
,current_job_pid='undefined'
,current_job_ref='undefined'
}};
compact({compact_db, N, D, [], _}, #state{nodes=[Node|Ns]}=State) ->
lager:debug("no shards to compact for ~s on ~s", [D, N]),
gen_fsm:send_event(self(), {compact_db, Node, D}),
{'next_state', compact, State#state{nodes=Ns}};
compact({compact_db, N, D, Ss, DDs}, #state{admin_conn=AdminConn}=State) ->
try lists:split(?MAX_COMPACTING_SHARDS, Ss) of
{Compact, Shards} ->
ShardsPidRef = compact_shards(AdminConn, Compact, DDs),
{'next_state', compact, State#state{shards_pid_ref=ShardsPidRef
,next_compaction_msg={compact_db, N, D, Shards, DDs}
}}
catch
'error':'badarg' ->
ShardsPidRef = compact_shards(AdminConn, Ss, DDs),
{'next_state', compact, State#state{shards_pid_ref=ShardsPidRef
,next_compaction_msg={compact_db, N, D, [], DDs}
}}
end;
compact(_Msg, State) ->
lager:debug("unhandled compact/2 msg: ~p", [_Msg]),
{'next_state', compact, State}.
compact(status, _, #state{current_node=N
,current_db=D
,queued_jobs=Jobs
}= State) ->
{'reply', {'ok', [{node, N}
,{db, D}
,{queued_jobs, queued_jobs_status(Jobs)}
]}, compact, State};
compact(cancel_current_job, _, #state{current_job_pid=P
,current_job_ref=Ref
}=State) ->
lager:debug("cancelling job"),
maybe_send_update(P, Ref, job_cancelled),
gen_fsm:send_event(self(), next_job),
{'reply', {'ok', job_cancelled}, 'ready'
,State#state{conn='undefined'
,admin_conn='undefined'
,current_node='undefined'
,current_db='undefined'
,nodes=[]
,dbs=[]
,wait_ref='undefined'
,current_job_pid='undefined'
,current_job_ref='undefined'
}};
compact(cancel_all_jobs, _, #state{queued_jobs=Jobs
,current_job_pid=CP
,current_job_ref=CRef
}=State) ->
lager:debug("cancelling all jobs"),
maybe_send_update(CP, CRef, job_cancelled),
_ = [ maybe_send_update(P, Ref, job_cancelled) || {_, P, Ref} <- queue:to_list(Jobs)],
{'reply', {'ok', jobs_cancelled}, 'ready'
,State#state{conn='undefined'
,admin_conn='undefined'
,current_node='undefined'
,current_db='undefined'
,nodes=[]
,dbs=[]
,wait_ref='undefined'
,current_job_pid='undefined'
,current_job_ref='undefined'
,queued_jobs=queue:new()
}};
compact(Msg, {NewP, _}, #state{queued_jobs=Jobs}=State) ->
lager:debug("recv msg, assuming new job: ~p", [Msg]),
{Ref, Jobs1} = queue_job(Msg, NewP, Jobs),
{'reply', {queued, Ref}, compact, State#state{queued_jobs=Jobs1}}.
%%--------------------------------------------------------------------
wait({timeout, Ref, Msg}, #state{wait_ref=Ref}=State) ->
gen_fsm:send_event(self(), Msg),
{'next_state', compact, State};
wait(_Msg, State) ->
lager:debug("unhandled wait/2 msg: ~p", [_Msg]),
{'next_state', wait, State}.
wait(status, _, #state{current_node=N
,current_db=D
,wait_ref=Ref
,queued_jobs=Jobs
}= State) ->
{'reply', {'ok', [{node, N}
,{db, D}
,{wait_left, erlang:read_timer(Ref)}
,{queued_jobs, queued_jobs_status(Jobs)}
]}
,wait, State};
wait(cancel_current_job, _, #state{current_job_pid=P
,current_job_ref=Ref
,wait_ref=WRef
}=State) ->
lager:debug("cancelling job"),
maybe_send_update(P, Ref, job_cancelled),
_ = erlang:cancel_timer(WRef),
gen_fsm:send_event(self(), next_job),
{'reply', {'ok', job_cancelled}, 'ready', State#state{conn='undefined'
,admin_conn='undefined'
,current_node='undefined'
,current_db='undefined'
,nodes=[]
,dbs=[]
,wait_ref='undefined'
,current_job_pid='undefined'
,current_job_ref='undefined'
}};
wait(cancel_all_jobs, _, #state{queued_jobs=Jobs
,current_job_pid=CP
,current_job_ref=CRef
,wait_ref=WRef
}=State) ->
lager:debug("cancelling all jobs"),
_ = erlang:cancel_timer(WRef),
maybe_send_update(CP, CRef, job_cancelled),
_ = [ maybe_send_update(P, Ref, job_cancelled) || {_, P, Ref} <- queue:to_list(Jobs)],
{'reply', {'ok', 'jobs_cancelled'}, 'ready', State#state{conn='undefined'
,admin_conn='undefined'
,current_node='undefined'
,current_db='undefined'
,nodes=[]
,dbs=[]
,wait_ref='undefined'
,current_job_pid='undefined'
,current_job_ref='undefined'
,queued_jobs=queue:new()
}};
wait(Msg, {NewP, _}, #state{queued_jobs=Jobs}=State) ->
lager:debug("recv msg, assuming new job: ~p", [Msg]),
{Ref, Jobs1} = queue_job(Msg, NewP, Jobs),
{'reply', {'queued', Ref}, wait, State#state{queued_jobs=Jobs1}}.
%%--------------------------------------------------------------------
%% @private
%% @doc
%% Whenever a gen_fsm receives an event sent using
%% gen_fsm:send_all_state_event/2, this function is called to handle
%% the event.
%%
%% @spec handle_event(Event, StateName, State) ->
%% {'next_state', NextStateName, NextState} |
%% {'next_state', NextStateName, NextState, Timeout} |
%% {stop, Reason, NewState}
%% @end
%%--------------------------------------------------------------------
handle_event(_Event, StateName, State) ->
lager:debug("unhandled evt for ~s: ~p", [StateName, _Event]),
{'next_state', StateName, State}.
%%--------------------------------------------------------------------
%% @private
%% @doc
%% Whenever a gen_fsm receives an event sent using
%% gen_fsm:sync_send_all_state_event/[2,3], this function is called
%% to handle the event.
%%
%% @spec handle_sync_event(Event, From, StateName, State) ->
%% {'next_state', NextStateName, NextState} |
%% {'next_state', NextStateName, NextState, Timeout} |
%% {'reply', Reply, NextStateName, NextState} |
%% {'reply', Reply, NextStateName, NextState, Timeout} |
%% {stop, Reason, NewState} |
%% {stop, Reason, Reply, NewState}
%% @end
%%--------------------------------------------------------------------
handle_sync_event(_Event, _From, StateName, State) ->
lager:debug("unhandled evt for ~s: ~p", [StateName, _Event]),
{'reply', {'error', 'invalid_sync_event'}, StateName, State}.
%%--------------------------------------------------------------------
%% @private
%% @doc
%% This function is called by a gen_fsm when it receives any
%% message other than a synchronous or asynchronous event
%% (or a system message).
%%
%% @spec handle_info(Info,StateName,State)->
%% {'next_state', NextStateName, NextState} |
%% {'next_state', NextStateName, NextState, Timeout} |
%% {stop, Reason, NewState}
%% @end
%%--------------------------------------------------------------------
handle_info('$maybe_start_auto_compaction_job', CurrentState, State) ->
maybe_start_auto_compaction_job(),
{'next_state', CurrentState, State};
handle_info({'DOWN', Ref, 'process', P, _Reason}, compact, #state{shards_pid_ref={P, Ref}
,next_compaction_msg=Msg
}=State) ->
WaitRef = gen_fsm:start_timer(?SLEEP_BETWEEN_COMPACTION, Msg),
{next_state, wait, State#state{wait_ref=WaitRef
,next_compaction_msg='undefined'
,shards_pid_ref='undefined'
}};
handle_info(_Info, StateName, State) ->
lager:debug("unhandled msg for ~s: ~p", [StateName, _Info]),
{'next_state', StateName, State}.
%%--------------------------------------------------------------------
%% @private
%% @doc
%% This function is called by a gen_fsm when it is about to
%% terminate. It should be the opposite of Module:init/1 and do any
%% necessary cleaning up. When it returns, the gen_fsm terminates with
%% Reason. The return value is ignored.
%%
%% @spec terminate(Reason, StateName, State) -> void()
%% @end
%%--------------------------------------------------------------------
terminate(_Reason, _StateName, _State) ->
lager:debug("compactor FSM going down in ~s: ~p", [_StateName, _Reason]).
%%--------------------------------------------------------------------
%% @private
%% @doc
%% Convert 'process' state when code is changed
%%
%% @spec code_change(OldVsn, StateName, State, Extra) ->
%% {'ok', StateName, NewState}
%% @end
%%--------------------------------------------------------------------
code_change(_OldVsn, StateName, State, _Extra) ->
{'ok', StateName, State}.
%%%===================================================================
%%% Internal functions
%%%===================================================================
get_nodes() ->
{'ok', Nodes} = couch_mgr:admin_all_docs(<<"nodes">>),
shuffle([wh_json:get_value(<<"id">>, Node) || Node <- Nodes]).
-spec shuffle(ne_binaries()) -> ne_binaries().
shuffle(L) ->
[O || {_, O} <- lists:keysort(1, [{random:uniform(), N} || N <- L])].
encode_db(D) ->
SRs = [{<<"/">>, <<"%2F">>}
,{<<"+">>, <<"%2B">>}
],
lists:foldl(fun({S, R}, B) ->
binary:replace(B, S, R, [global])
end, D, SRs).
encode_design_doc(Design) ->
binary:replace(Design, <<"_design/">>, <<>>, [global]).
-spec node_dbs(#server{}) -> {'ok', wh_json:json_strings()}.
node_dbs(AdminConn) ->
{'ok', Dbs} = couch_util:all_docs(AdminConn, <<"dbs">>, []),
{'ok', shuffle([wh_json:get_value(<<"id">>, Db) || Db <- Dbs])}.
db_shards(AdminConn, N, D) ->
case couch_util:open_cache_doc(AdminConn, <<"dbs">>, D, []) of
{'ok', Doc} ->
Suffix = wh_json:get_value(<<"shard_suffix">>, Doc),
Ranges = wh_json:get_value([<<"by_node">>, N], Doc, []),
[<<"shards%2f", Range/binary, "%2f", (encode_db(D))/binary, (wh_util:to_binary(Suffix))/binary>>
|| Range <- Ranges
];
{'error', _E} ->
lager:debug("failed to fetch shards for ~s on ~s", [D, N]),
[]
end.
db_design_docs(Conn, D) ->
case couch_util:all_design_docs(Conn, encode_db(D), []) of
{'ok', Designs} -> [encode_design_doc(wh_json:get_value(<<"id">>, Design)) || Design <- Designs];
{'error', _} -> []
end.
-spec compact_shards(server(), list(), list()) -> {pid(), reference()}.
compact_shards(AdminConn, Ss, DDs) ->
PR = spawn_monitor(fun() ->
Ps = [spawn_monitor(?MODULE, 'compact_shard', [AdminConn, Shard, DDs]) || Shard <- Ss],
MaxWait = max_wait_for_compaction(),
wait_for_pids(MaxWait, Ps)
end),
lager:debug("compacting shards in ~p", [PR]),
PR.
wait_for_pids(_, []) -> 'ok';
wait_for_pids(MaxWait, [{P,Ref}|Ps]) ->
receive {'DOWN', Ref, 'process', P, _} -> wait_for_pids(MaxWait, Ps)
after MaxWait -> wait_for_pids(MaxWait, Ps)
end.
compact_shard(AdminConn, S, DDs) ->
put('callid', S),
wait_for_compaction(AdminConn, S),
couch_util:db_compact(AdminConn, S),
wait_for_compaction(AdminConn, S),
couch_util:db_view_cleanup(AdminConn, S),
wait_for_compaction(AdminConn, S),
compact_design_docs(AdminConn, S, DDs),
wait_for_compaction(AdminConn, S),
lager:debug("finished compacting").
compact_design_docs(AdminConn, S, DDs) ->
try lists:split(?MAX_COMPACTING_VIEWS, DDs) of
{Compact, Remaining} ->
_ = [couch_util:design_compact(AdminConn, S, DD) || DD <- Compact],
wait_for_compaction(AdminConn, S),
compact_design_docs(AdminConn, S, Remaining)
catch
'error':'badarg' ->
_ = [couch_util:design_compact(AdminConn, S, DD) || DD <- DDs],
wait_for_compaction(AdminConn, S)
end.
wait_for_compaction(AdminConn, S) ->
wait_for_compaction(AdminConn, S, couch_util:db_info(AdminConn, S)).
wait_for_compaction(_AdminConn, _S, {'error', 'db_not_found'}) -> 'ok';
wait_for_compaction(AdminConn, S, {'error', _E}) ->
'ok' = timer:sleep(sleep_between_poll()),
wait_for_compaction(AdminConn, S);
wait_for_compaction(AdminConn, S, {'ok', ShardData}) ->
case wh_json:is_true(<<"compact_running">>, ShardData, 'false') of
'false' -> 'ok';
'true' ->
'ok' = timer:sleep(sleep_between_poll()),
wait_for_compaction(AdminConn, S)
end.
get_node_connections(N, Cookie) ->
[_, Host] = binary:split(N, <<"@">>),
{User,Pass} = wh_couch_connections:get_creds(),
{Port, AdminPort} = get_ports(wh_util:to_atom(N, 'true'), Cookie),
get_node_connections(Host, Port, User, Pass, AdminPort).
get_node_connections(Host, Port, User, Pass, AdminPort) ->
{couch_util:get_new_connection(Host, Port, User, Pass),
couch_util:get_new_connection(Host, AdminPort, User, Pass)
}.
get_ports(Node, Cookie) ->
erlang:set_cookie(Node, Cookie),
case net_adm:ping(Node) =:= 'pong' andalso get_ports(Node) of
'false' -> {wh_couch_connections:get_port(), wh_couch_connections:get_admin_port()};
Ports -> Ports
end.
get_ports(Node) ->
try {get_port(Node, ["chttpd", "port"], fun wh_couch_connections:get_port/0)
,get_port(Node, ["httpd", "port"], fun wh_couch_connections:get_admin_port/0)
} of
Ports -> Ports
catch
_E:_R ->
lager:debug("failed to get ports: ~s: ~p", [_E, _R]),
{wh_couch_connections:get_port(), wh_couch_connections:get_admin_port()}
end.
get_port(Node, Key, DefaultFun) ->
case rpc:call(Node, 'couch_config', 'get', Key) of
{'badrpc', _} -> DefaultFun();
P -> wh_util:to_integer(P)
end.
maybe_send_update(P, Ref, Update) when is_pid(P) ->
case erlang:is_process_alive(P) of
'true' -> P ! {Update, Ref}, 'ok';
'false' -> 'ok'
end;
maybe_send_update(_,_,_) -> 'ok'.
maybe_start_auto_compaction_job() ->
case compact_automatically()
andalso (catch wh_couch_connections:test_admin_conn())
of
{'ok', _} ->
gen_fsm:send_event(self(), compact);
_ ->
erlang:send_after(60000, self(), '$maybe_start_auto_compaction_job'),
'ok'
end.
-spec queued_jobs_status(queue()) -> 'none' | [wh_proplist(),...].
queued_jobs_status(Jobs) ->
case queue:to_list(Jobs) of
[] -> 'none';
Js -> [[{'job', J}, {'requested_by', P}] || {J, P, _} <- Js]
end.
max_wait_for_compaction() ->
try whapps_config:get(?CONFIG_CAT, <<"max_wait_for_compaction_pid">>, ?MAX_WAIT_FOR_COMPACTION_PID) of
Time -> wh_util:to_integer(Time)
catch
_:_ -> ?MAX_WAIT_FOR_COMPACTION_PID
end.
sleep_between_poll() ->
try whapps_config:get(?CONFIG_CAT, <<"sleep_between_poll">>, ?SLEEP_BETWEEN_POLL) of
Time -> wh_util:to_integer(Time)
catch