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
|
/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* Fluent Bit
* ==========
* Copyright (C) 2015-2022 The Fluent Bit Authors
*
* Licensed 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.
*/
#include <fluent-bit/flb_output_plugin.h>
#include <fluent-bit/flb_pack.h>
#include <fluent-bit/flb_utils.h>
struct flb_null {
struct flb_output_instance *ins;
/* config map properties */
int out_format;
int json_date_format;
flb_sds_t json_date_key;
flb_sds_t date_key;
};
int cb_null_init(struct flb_output_instance *ins, struct flb_config *config,
void *data)
{
int ret;
(void) config;
(void) data;
const char *tmp;
struct flb_null *ctx;
ctx = flb_malloc(sizeof(struct flb_null));
if (!ctx) {
flb_errno();
return -1;
}
ctx->ins = ins;
ret = flb_output_config_map_set(ins, (void *) ctx);
if (ret == -1) {
flb_free(ctx);
return -1;
}
ctx->out_format = FLB_PACK_JSON_FORMAT_NONE;
tmp = flb_output_get_property("format", ins);
if (tmp) {
ret = flb_pack_to_json_format_type(tmp);
if (ret == -1) {
flb_plg_error(ctx->ins, "unrecognized 'format' option. "
"Using 'msgpack'");
}
else {
ctx->out_format = ret;
}
}
/* Date key */
ctx->date_key = ctx->json_date_key;
tmp = flb_output_get_property("json_date_key", ins);
if (tmp) {
/* Just check if we have to disable it */
if (flb_utils_bool(tmp) == FLB_FALSE) {
ctx->date_key = NULL;
}
}
/* Date format for JSON output */
ctx->json_date_format = FLB_PACK_JSON_DATE_DOUBLE;
tmp = flb_output_get_property("json_date_format", ins);
if (tmp) {
ret = flb_pack_to_json_date_type(tmp);
if (ret == -1) {
flb_plg_error(ctx->ins, "invalid json_date_format '%s'. "
"Using 'double' type", tmp);
}
else {
ctx->json_date_format = ret;
}
}
flb_output_set_context(ins, ctx);
return 0;
}
static void cb_null_flush(struct flb_event_chunk *event_chunk,
struct flb_output_flush *out_flush,
struct flb_input_instance *i_ins,
void *out_context,
struct flb_config *config)
{
(void) out_context;
(void) config;
flb_sds_t json;
struct flb_null *ctx = out_context;
#ifdef FLB_HAVE_METRICS
/* Check if the event type is metrics, just return */
if (event_chunk->type == FLB_EVENT_TYPE_METRICS) {
FLB_OUTPUT_RETURN(FLB_OK);
}
#endif
/*
* There are cases where the user might want to test the performance
* of msgpack payload conversion to JSON. Nothing will be printed,
* just encodeed and destroyed.
*/
if (ctx->out_format != FLB_PACK_JSON_FORMAT_NONE) {
json = flb_pack_msgpack_to_json_format(event_chunk->data,
event_chunk->size,
ctx->out_format,
ctx->json_date_format,
ctx->date_key);
flb_sds_destroy(json);
}
flb_plg_debug(ctx->ins, "discarding %lu bytes", event_chunk->size);
FLB_OUTPUT_RETURN(FLB_OK);
}
/* Configuration properties map */
static struct flb_config_map config_map[] = {
{
FLB_CONFIG_MAP_STR, "format", NULL,
0, FLB_FALSE, 0,
"Specifies the data format to be printed. Supported formats are msgpack json, json_lines and json_stream."
},
{
FLB_CONFIG_MAP_STR, "json_date_format", NULL,
0, FLB_FALSE, 0,
"Specifies the name of the date field in output."
},
{
FLB_CONFIG_MAP_STR, "json_date_key", "date",
0, FLB_TRUE, offsetof(struct flb_null, json_date_key),
FBL_PACK_JSON_DATE_FORMAT_DESCRIPTION
},
/* EOF */
{0}
};
static int cb_null_exit(void *data, struct flb_config *config)
{
struct flb_null *ctx = data;
if (!ctx) {
return 0;
}
flb_free(ctx);
return 0;
}
struct flb_output_plugin out_null_plugin = {
.name = "null",
.description = "Throws away events",
.cb_init = cb_null_init,
.cb_flush = cb_null_flush,
.cb_exit = cb_null_exit,
.event_type = FLB_OUTPUT_LOGS | FLB_OUTPUT_METRICS,
.config_map = config_map,
.flags = 0,
.workers = 1,
};
|
