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flb_engine_dispatch.c
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flb_engine_dispatch.c
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/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* Fluent Bit
* ==========
* Copyright (C) 2015-2018 Treasure Data Inc.
*
* 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
*
* https://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 <stdlib.h>
#include <fluent-bit/flb_info.h>
#include <fluent-bit/flb_input.h>
#include <fluent-bit/flb_output.h>
#include <fluent-bit/flb_router.h>
#include <fluent-bit/flb_config.h>
#include <fluent-bit/flb_thread.h>
#include <fluent-bit/flb_engine.h>
#include <fluent-bit/flb_task.h>
void flb_task_add_thread(struct flb_thread *thread,
struct flb_task *task);
#if defined (FLB_HAVE_FLUSH_LIBCO)
/* It creates a new output thread using a 'Retry' context */
int flb_engine_dispatch_retry(struct flb_task_retry *retry,
struct flb_config *config)
{
struct flb_thread *th;
struct flb_task *task;
struct flb_input_instance *i_ins;
task = retry->parent;
i_ins = task->i_ins;
th = flb_output_thread(task,
i_ins,
retry->o_ins,
config,
task->buf, task->size,
task->tag,
strlen(task->tag));
if (!th) {
return -1;
}
flb_task_add_thread(th, task);
flb_thread_resume(th);
return 0;
}
static int tasks_start(struct flb_input_instance *in,
struct flb_config *config)
{
struct mk_list *tmp;
struct mk_list *head;
struct mk_list *r_head;
struct flb_task *task;
struct flb_thread *th;
struct flb_task_route *route;
/* At this point the input instance should have some tasks linked */
mk_list_foreach_safe(head, tmp, &in->tasks) {
task = mk_list_entry(head, struct flb_task, _head);
/* Only process recently created tasks */
if (task->status != FLB_TASK_NEW) {
continue;
}
task->status = FLB_TASK_RUNNING;
/* A task contain one or more routes */
mk_list_foreach(r_head, &task->routes) {
route = mk_list_entry(r_head, struct flb_task_route, _head);
/*
* We have the Task and the Route, created a thread context for the
* data handling.
*/
th = flb_output_thread(task,
in,
route->out,
config,
task->buf, task->size,
task->tag,
strlen(task->tag));
flb_task_add_thread(th, task);
flb_thread_resume(th);
}
}
return 0;
}
/*
* The engine dispatch is responsible for:
*
* - Get records from input plugins (fixed tags and dynamic tags)
* - For each set of records under the same tag, create a Task. A Task set
* a reference to the records and routes through output instances.
*/
int flb_engine_dispatch(uint64_t id, struct flb_input_instance *in,
struct flb_config *config)
{
char *buf;
size_t size;
struct flb_input_plugin *p;
struct flb_task *task = NULL;
p = in->p;
if (!p) {
return 0;
}
if (in->flags & FLB_INPUT_DYN_TAG) {
/* Iterate dynamic tag buffers */
struct mk_list *d_head, *tmp;
struct flb_input_dyntag *dt;
mk_list_foreach_safe(d_head, tmp, &in->dyntags) {
dt = mk_list_entry(d_head, struct flb_input_dyntag, _head);
if (dt->busy == FLB_TRUE) {
continue;
}
/* There is a match, get the buffer */
buf = flb_input_dyntag_flush(dt, &size);
if (size == 0) {
/*
* Do not release the buffer since if allocated, it will be
* released upon input_dyntag context destroy.
*/
continue;
}
if (!buf) {
continue;
}
flb_trace("[dyntag %s] %p tag=%s", dt->in->name, dt, dt->tag);
task = flb_task_create(id, buf, size, dt->in, dt, dt->tag, config);
if (!task) {
/* Do not release the buffer, will happen on dyntag destroy */
continue;
}
}
}
else {
/* Get data from instance buffers */
buf = flb_input_flush(in, &size);
if (!buf || size == 0) {
if (buf) {
flb_free(buf);
}
return 0;
}
/*
* Create an engine task, the task will hold the buffer reference
* and the co-routines associated to the output instance plugins
* that needs to handle the data.
*/
task = flb_task_create(id, buf, size, in, NULL, in->tag, config);
if (!task) {
flb_free(buf);
return -1;
}
flb_trace("[engine dispatch] task #%i created %p", task->id, task);
}
/* Start the new enqueued Tasks */
tasks_start(in, config);
return 0;
}
/*
* Given an input instance, buffer and a bitmask of routes, create the task
* and routes associated for processing. This mechanism does direct routing
* without the use of a Tag.
*/
int flb_engine_dispatch_direct(uint64_t id,
struct flb_input_instance *in,
char *buf, size_t size,
char *tag, uint64_t routes,
char *hash_str,
struct flb_config *config)
{
struct flb_task *task;
task = flb_task_create_direct(id, buf, size, in, tag, hash_str,
routes, config);
if (!task) {
return -1;
}
flb_trace("[engine dispatch direct] task created %p", task);
/* Start the new enqueued Tasks */
tasks_start(in, config);
return 0;
}
#endif /* !FLB_HAVE_FLUSH_LIBCO */