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/* -*- 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_info.h>
#include <fluent-bit/flb_log.h>
#include <fluent-bit/flb_mem.h>
#include <fluent-bit/flb_input.h>
#include <fluent-bit/flb_metrics.h>
#include <fluent-bit/flb_storage.h>
#include <fluent-bit/flb_utils.h>
#include <fluent-bit/stream_processor/flb_sp.h>
#include <fluent-bit/stream_processor/flb_sp_parser.h>
#include <fluent-bit/stream_processor/flb_sp_stream.h>
/* Function defined in plugins/in_stream_processor/sp.c */
int in_stream_processor_add_chunk(const char *buf_data, size_t buf_size,
struct flb_input_instance *in);
int flb_sp_stream_create(const char *name, struct flb_sp_task *task,
struct flb_sp *sp)
{
int ret;
const char *tmp;
struct flb_input_instance *in;
struct flb_sp_stream *stream;
/* The name must be different than an input plugin instance name or alias */
ret = flb_input_name_exists(name, sp->config);
if (ret == FLB_TRUE) {
flb_error("[sp] stream name '%s' already exists", name);
return -1;
}
/* Create stream context for 'stream processor' */
stream = flb_calloc(1, sizeof(struct flb_sp_stream));
if (!stream) {
flb_errno();
return -1;
}
stream->name = flb_sds_create(name);
if (!stream->name) {
flb_free(stream);
return -1;
}
/*
* Register an input plugin instance using 'in_stream_processor', that one
* is used as the parent plugin to ingest data back into Fluent Bit
* data pipeline.
*/
in = flb_input_new(sp->config, "stream_processor", NULL, FLB_FALSE);
if (!in) {
flb_error("[sp] cannot create instance of in_stream_processor");
flb_free(stream);
return -1;
}
/* Set an alias, otherwise the stream will be called stream_processor.N */
ret = flb_input_set_property(in, "alias", name);
if (ret == -1) {
flb_warn("[sp] cannot set stream name, using fallback name %s",
in->name);
}
/*
* Lookup for Stream properties: at this point we only care about a
* possible Tag defined in the query, e.g:
*
* CREATE STREAM data WITH(tag='mydata') as SELECT * FROM STREAM:apache;
*/
tmp = flb_sp_cmd_stream_prop_get(task->cmd, "tag");
if (tmp) {
/*
* Duplicate value in a new variable since input instance property
* will be released upon plugin exit.
*/
stream->tag = flb_sds_create(tmp);
if (!stream->tag) {
flb_error("[sp] cannot set Tag property");
flb_sp_stream_destroy(stream, sp);
return -1;
}
/* Tag property is just an assignation, cannot fail */
flb_input_set_property(in, "tag", stream->tag);
}
/*
* Check if the new stream is 'routable' or not
*/
tmp = flb_sp_cmd_stream_prop_get(task->cmd, "routable");
if (tmp) {
stream->routable = flb_utils_bool(tmp);
flb_input_set_property(in, "routable", tmp);
}
/*
* Set storage type
*/
tmp = flb_sp_cmd_stream_prop_get(task->cmd, "storage.type");
if (tmp) {
flb_input_set_property(in, "storage.type", tmp);
}
/* Initialize instance */
ret = flb_input_instance_init(in, sp->config);
if (ret == -1) {
flb_error("[sp] cannot initialize instance of in_stream_processor");
flb_input_instance_exit(in, sp->config);
flb_input_instance_destroy(in);
}
stream->in = in;
/* Initialize plugin collector (event callback) */
flb_input_collector_start(0, in);
#ifdef FLB_HAVE_METRICS
/* Override Metrics title */
ret = flb_metrics_title(name, in->metrics);
if (ret == -1) {
flb_warn("[sp] cannot set metrics title, using fallback name %s",
in->name);
}
#endif
/* Storage context */
ret = flb_storage_input_create(sp->config->cio, in);
if (ret == -1) {
flb_error("[sp] cannot initialize storage for stream '%s'",
name);
flb_sp_stream_destroy(stream, sp);
return -1;
}
task->stream = stream;
return 0;
}
int flb_sp_stream_append_data(const char *buf_data, size_t buf_size,
struct flb_sp_stream *stream)
{
return in_stream_processor_add_chunk(buf_data, buf_size, stream->in);
}
void flb_sp_stream_destroy(struct flb_sp_stream *stream, struct flb_sp *sp)
{
flb_sds_destroy(stream->name);
flb_sds_destroy(stream->tag);
flb_input_instance_exit(stream->in, sp->config);
flb_input_instance_destroy(stream->in);
flb_free(stream);
}
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