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1 | -module(beam_stats_consumer_csv). |
2 | ||
3 | -include("include/beam_stats.hrl"). | |
f079a56c | 4 | -include("beam_stats_logging.hrl"). |
caf75ed8 SK |
5 | |
6 | -behaviour(beam_stats_consumer). | |
7 | ||
8 | -export_type( | |
9 | [ option/0 | |
10 | ]). | |
11 | ||
12 | -export( | |
13 | [ init/1 | |
14 | , consume/2 | |
15 | , terminate/1 | |
16 | ]). | |
17 | ||
18 | -type option() :: | |
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19 | {consumption_interval , non_neg_integer()} |
20 | | {path , file:filename()} | |
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21 | . |
22 | ||
23 | -record(state, | |
24 | { path :: file:filename() | |
25 | , file = none :: hope_option:t(file:io_device()) | |
26 | }). | |
27 | ||
28 | -type state() :: | |
29 | #state{}. | |
30 | ||
31 | -spec init([option()]) -> | |
76aefffb | 32 | {non_neg_integer(), state()}. |
caf75ed8 SK |
33 | init(Options) -> |
34 | ConsumptionInterval = hope_kv_list:get(Options, consumption_interval, 60000), | |
35 | {some, Path} = hope_kv_list:get(Options, path), | |
36 | State = #state | |
37 | { path = Path | |
38 | , file = none | |
39 | }, | |
40 | {ConsumptionInterval, State}. | |
41 | ||
42 | -spec consume(beam_stats_consumer:queue(), state()) -> | |
43 | state(). | |
44 | consume(Q, #state{}=State1) -> | |
45 | Payload = beam_stats_queue_to_binary(Q), | |
46 | State2 = try_to_open_if_no_file(State1), | |
47 | try_to_write(State2, Payload). | |
48 | ||
49 | -spec terminate(state()) -> | |
50 | {}. | |
51 | terminate(#state{file=FileOpt}) -> | |
a3fdbec9 | 52 | hope_option:iter(FileOpt, fun file:close/1). |
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53 | |
54 | %% ============================================================================ | |
55 | ||
56 | -spec try_to_write(state(), binary()) -> | |
57 | state(). | |
58 | try_to_write(#state{file=none, path=Path}=State, _) -> | |
f079a56c | 59 | ?log_error("Writing to file (~p) failed: no file in state.", [Path]), |
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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 -> | |
f079a56c | 66 | ?log_error("file:write(~p, ~p) -> ~p", [File, Payload, Error]), |
caf75ed8 SK |
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) -> | |
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77 | Options = [append], |
78 | case file:open(Path, Options) | |
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79 | of {ok, File} -> |
80 | State#state{file = {some, File}} | |
81 | ; {error, _}=Error -> | |
f079a56c | 82 | ?log_error("file:open(~p, ~p) -> ~p", [Path, Options, Error]), |
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83 | State#state{file = none} |
84 | end. | |
85 | ||
86 | -spec beam_stats_queue_to_binary(beam_stats_consumer:queue()) -> | |
87 | binary(). | |
88 | beam_stats_queue_to_binary(BEAMStatsQ) -> | |
89 | Bins = [beam_stats_to_bin(B) || B <- queue:to_list(BEAMStatsQ)], | |
90 | iolist_to_binary(Bins). | |
91 | ||
92 | ||
93 | -spec beam_stats_to_bin(beam_stats:t()) -> | |
94 | binary(). | |
95 | beam_stats_to_bin(#beam_stats | |
96 | { timestamp = Timestamp | |
97 | , node_id = NodeID | |
98 | , memory = Memory | |
99 | } | |
100 | ) -> | |
101 | <<TimestampBin/binary>> = timestamp_to_bin(Timestamp), | |
102 | <<NodeIDBin/binary>> = node_id_to_bin(NodeID), | |
101874c3 | 103 | MemoryPairToBin = make_pair_to_bin(NodeIDBin, TimestampBin, <<"memory">>), |
caf75ed8 | 104 | MemoryBinPairs = lists:map(fun atom_int_to_bin_bin/1, Memory), |
101874c3 | 105 | MemoryBins = lists:map(MemoryPairToBin, MemoryBinPairs), |
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106 | AllBins = |
107 | [ MemoryBins | |
108 | ], | |
109 | iolist_to_binary(AllBins). | |
110 | ||
111 | -spec timestamp_to_bin(erlang:timestamp()) -> | |
112 | binary(). | |
113 | timestamp_to_bin(Timestamp) -> | |
114 | TimestampFloat = timestamp_to_float(Timestamp), | |
115 | {{Year, Month, Day}, {Hour, Min, Sec}} = calendar:now_to_local_time(Timestamp), | |
116 | SecondsFloat = Sec + (TimestampFloat - trunc(TimestampFloat)), | |
117 | Fmt2Digits = "~2.10.0b", | |
118 | FmtDate = string:join(["~b" , Fmt2Digits, Fmt2Digits], "-"), | |
119 | FmtTime = string:join([Fmt2Digits, Fmt2Digits, "~9..0f" ], ":"), | |
120 | Separator = " ", | |
121 | Fmt = FmtDate ++ Separator ++ FmtTime, | |
122 | IOList = io_lib:format(Fmt, [Year, Month, Day, Hour, Min, SecondsFloat]), | |
123 | iolist_to_binary(IOList). | |
124 | ||
125 | -spec timestamp_to_float(erlang:timestamp()) -> | |
126 | float(). | |
127 | timestamp_to_float({ComponentMega, ComponentWhole, ComponentMicro}) -> | |
128 | OneMillion = 1000000, | |
129 | TotalWholeSeconds = ComponentMega * OneMillion + ComponentWhole, | |
130 | TotalMicroSeconds = (TotalWholeSeconds * OneMillion) + ComponentMicro, | |
131 | TotalMicroSeconds / OneMillion. | |
132 | ||
101874c3 | 133 | -spec make_pair_to_bin(binary(), binary(), binary()) -> |
caf75ed8 | 134 | fun(({binary(), binary()}) -> binary()). |
101874c3 | 135 | make_pair_to_bin(<<NodeID/binary>>, <<TimestampBin/binary>>, <<Type/binary>>) -> |
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136 | fun ({<<K/binary>>, <<V/binary>>}) -> |
137 | << TimestampBin/binary | |
138 | , "|" | |
139 | , NodeID/binary | |
140 | , "|" | |
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141 | , Type/binary |
142 | , "|" | |
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143 | , K/binary |
144 | , "|" | |
145 | , V/binary | |
146 | , "\n" | |
147 | >> | |
148 | end. | |
149 | ||
150 | -spec node_id_to_bin(node()) -> | |
151 | binary(). | |
152 | node_id_to_bin(NodeID) -> | |
153 | atom_to_binary(NodeID, utf8). | |
154 | ||
155 | -spec atom_int_to_bin_bin({atom(), integer()}) -> | |
156 | {binary(), binary()}. | |
157 | atom_int_to_bin_bin({K, V}) -> | |
158 | {atom_to_binary(K, latin1), integer_to_binary(V)}. |