diff options
Diffstat (limited to 'src/fluent-bit/plugins/out_null/null.c')
| -rw-r--r-- | src/fluent-bit/plugins/out_null/null.c | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/src/fluent-bit/plugins/out_null/null.c b/src/fluent-bit/plugins/out_null/null.c new file mode 100644 index 000000000..a1e1689a0 --- /dev/null +++ b/src/fluent-bit/plugins/out_null/null.c @@ -0,0 +1,178 @@ +/* -*- 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, +}; |