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caf75ed8 SK |
1 | -module(beam_stats_consumer_csv). |
2 | ||
3 | -include("include/beam_stats.hrl"). | |
4 | ||
5 | -behaviour(beam_stats_consumer). | |
6 | ||
7 | -export_type( | |
8 | [ option/0 | |
9 | ]). | |
10 | ||
11 | -export( | |
12 | [ init/1 | |
13 | , consume/2 | |
14 | , terminate/1 | |
15 | ]). | |
16 | ||
17 | -type option() :: | |
b2f78fc6 SK |
18 | {consumption_interval , non_neg_integer()} |
19 | | {path , file:filename()} | |
caf75ed8 SK |
20 | . |
21 | ||
22 | -record(state, | |
23 | { path :: file:filename() | |
24 | , file = none :: hope_option:t(file:io_device()) | |
25 | }). | |
26 | ||
27 | -type state() :: | |
28 | #state{}. | |
29 | ||
30 | -spec init([option()]) -> | |
76aefffb | 31 | {non_neg_integer(), state()}. |
caf75ed8 SK |
32 | init(Options) -> |
33 | ConsumptionInterval = hope_kv_list:get(Options, consumption_interval, 60000), | |
34 | {some, Path} = hope_kv_list:get(Options, path), | |
35 | State = #state | |
36 | { path = Path | |
37 | , file = none | |
38 | }, | |
39 | {ConsumptionInterval, State}. | |
40 | ||
41 | -spec consume(beam_stats_consumer:queue(), state()) -> | |
42 | state(). | |
43 | consume(Q, #state{}=State1) -> | |
44 | Payload = beam_stats_queue_to_binary(Q), | |
45 | State2 = try_to_open_if_no_file(State1), | |
46 | try_to_write(State2, Payload). | |
47 | ||
48 | -spec terminate(state()) -> | |
49 | {}. | |
50 | terminate(#state{file=FileOpt}) -> | |
51 | ok = hope_option:iter(FileOpt, fun file:close/1), | |
52 | {}. | |
53 | ||
54 | %% ============================================================================ | |
55 | ||
56 | -spec try_to_write(state(), binary()) -> | |
57 | state(). | |
58 | try_to_write(#state{file=none, path=Path}=State, _) -> | |
59 | io:format("error: file closed: ~s~n", [Path]), | |
60 | State; | |
61 | try_to_write(#state{file={some, File}}=State, Payload) -> | |
62 | case file:write(File, Payload) | |
63 | of ok -> | |
64 | State | |
65 | ; {error, _}=Error -> | |
66 | io:format("error: file:write/2 failed: ~p~n", [Error]), | |
67 | % TODO: Maybe schedule retry? | |
68 | ok = file:close(File), | |
69 | State#state{file=none} | |
70 | end. | |
71 | ||
72 | -spec try_to_open_if_no_file(state()) -> | |
73 | state(). | |
74 | try_to_open_if_no_file(#state{file={some, _}}=State) -> | |
75 | State; | |
76 | try_to_open_if_no_file(#state{file=none, path=Path}=State) -> | |
77 | case file:open(Path, [append]) | |
78 | of {ok, File} -> | |
79 | State#state{file = {some, File}} | |
80 | ; {error, _}=Error -> | |
81 | io:format("error: file:open/2 failed: ~p~n", [Error]), | |
82 | State#state{file = none} | |
83 | end. | |
84 | ||
85 | -spec beam_stats_queue_to_binary(beam_stats_consumer:queue()) -> | |
86 | binary(). | |
87 | beam_stats_queue_to_binary(BEAMStatsQ) -> | |
88 | Bins = [beam_stats_to_bin(B) || B <- queue:to_list(BEAMStatsQ)], | |
89 | iolist_to_binary(Bins). | |
90 | ||
91 | ||
92 | -spec beam_stats_to_bin(beam_stats:t()) -> | |
93 | binary(). | |
94 | beam_stats_to_bin(#beam_stats | |
95 | { timestamp = Timestamp | |
96 | , node_id = NodeID | |
97 | , memory = Memory | |
98 | } | |
99 | ) -> | |
100 | <<TimestampBin/binary>> = timestamp_to_bin(Timestamp), | |
101 | <<NodeIDBin/binary>> = node_id_to_bin(NodeID), | |
102 | PairToBin = make_pair_to_bin(NodeIDBin, TimestampBin), | |
103 | MemoryBinPairs = lists:map(fun atom_int_to_bin_bin/1, Memory), | |
104 | MemoryBins = lists:map(PairToBin, MemoryBinPairs), | |
105 | AllBins = | |
106 | [ MemoryBins | |
107 | ], | |
108 | iolist_to_binary(AllBins). | |
109 | ||
110 | -spec timestamp_to_bin(erlang:timestamp()) -> | |
111 | binary(). | |
112 | timestamp_to_bin(Timestamp) -> | |
113 | TimestampFloat = timestamp_to_float(Timestamp), | |
114 | {{Year, Month, Day}, {Hour, Min, Sec}} = calendar:now_to_local_time(Timestamp), | |
115 | SecondsFloat = Sec + (TimestampFloat - trunc(TimestampFloat)), | |
116 | Fmt2Digits = "~2.10.0b", | |
117 | FmtDate = string:join(["~b" , Fmt2Digits, Fmt2Digits], "-"), | |
118 | FmtTime = string:join([Fmt2Digits, Fmt2Digits, "~9..0f" ], ":"), | |
119 | Separator = " ", | |
120 | Fmt = FmtDate ++ Separator ++ FmtTime, | |
121 | IOList = io_lib:format(Fmt, [Year, Month, Day, Hour, Min, SecondsFloat]), | |
122 | iolist_to_binary(IOList). | |
123 | ||
124 | -spec timestamp_to_float(erlang:timestamp()) -> | |
125 | float(). | |
126 | timestamp_to_float({ComponentMega, ComponentWhole, ComponentMicro}) -> | |
127 | OneMillion = 1000000, | |
128 | TotalWholeSeconds = ComponentMega * OneMillion + ComponentWhole, | |
129 | TotalMicroSeconds = (TotalWholeSeconds * OneMillion) + ComponentMicro, | |
130 | TotalMicroSeconds / OneMillion. | |
131 | ||
132 | -spec make_pair_to_bin(binary(), binary()) -> | |
133 | fun(({binary(), binary()}) -> binary()). | |
134 | make_pair_to_bin(<<NodeID/binary>>, <<TimestampBin/binary>>) -> | |
135 | fun ({<<K/binary>>, <<V/binary>>}) -> | |
136 | << TimestampBin/binary | |
137 | , "|" | |
138 | , NodeID/binary | |
139 | , "|" | |
140 | , K/binary | |
141 | , "|" | |
142 | , V/binary | |
143 | , "\n" | |
144 | >> | |
145 | end. | |
146 | ||
147 | -spec node_id_to_bin(node()) -> | |
148 | binary(). | |
149 | node_id_to_bin(NodeID) -> | |
150 | atom_to_binary(NodeID, utf8). | |
151 | ||
152 | -spec atom_int_to_bin_bin({atom(), integer()}) -> | |
153 | {binary(), binary()}. | |
154 | atom_int_to_bin_bin({K, V}) -> | |
155 | {atom_to_binary(K, latin1), integer_to_binary(V)}. |