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/*
Copyright (c) 2019 Sogou, 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
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.
Authors: Wu Jiaxu (wujiaxu@sogou-inc.com)
*/
#ifndef _WFGLOBAL_H_
#define _WFGLOBAL_H_
#if __cplusplus < 201100
#error CPLUSPLUS VERSION required at least C++11. Please use "-std=c++11".
#include <C++11_REQUIRED>
#endif
#include <openssl/ssl.h>
#include <string>
#include "CommScheduler.h"
#include "DnsCache.h"
#include "RouteManager.h"
#include "Executor.h"
#include "EndpointParams.h"
#include "WFResourcePool.h"
#include "WFNameService.h"
#include "WFDnsResolver.h"
/**
* @file WFGlobal.h
* @brief Workflow Global Settings & Workflow Global APIs
*/
/**
* @brief Workflow Library Global Setting
* @details
* If you want set different settings with default, please call WORKFLOW_library_init at the beginning of the process
*/
struct WFGlobalSettings
{
struct EndpointParams endpoint_params;
struct EndpointParams dns_server_params;
unsigned int dns_ttl_default; ///< in seconds, DNS TTL when network request success
unsigned int dns_ttl_min; ///< in seconds, DNS TTL when network request fail
int dns_threads;
int poller_threads;
int handler_threads;
int compute_threads; ///< auto-set by system CPU number if value<0
int fio_max_events;
const char *resolv_conf_path;
const char *hosts_path;
};
/**
* @brief Default Workflow Library Global Settings
*/
static constexpr struct WFGlobalSettings GLOBAL_SETTINGS_DEFAULT =
{
.endpoint_params = ENDPOINT_PARAMS_DEFAULT,
.dns_server_params = ENDPOINT_PARAMS_DEFAULT,
.dns_ttl_default = 3600,
.dns_ttl_min = 60,
.dns_threads = 4,
.poller_threads = 4,
.handler_threads = 20,
.compute_threads = -1,
.fio_max_events = 4096,
.resolv_conf_path = "/etc/resolv.conf",
.hosts_path = "/etc/hosts",
};
/**
* @brief Reset Workflow Library Global Setting
* @param[in] settings custom settings pointer
*/
extern void WORKFLOW_library_init(const struct WFGlobalSettings *settings);
/**
* @brief Workflow Global Management Class
* @details Workflow Global APIs
*/
class WFGlobal
{
public:
/**
* @brief register default port for one scheme string
* @param[in] scheme scheme string
* @param[in] port default port value
* @warning No effect when scheme is "http"/"https"/"redis"/"rediss"/"mysql"/"kafka"
*/
static void register_scheme_port(const std::string& scheme,
unsigned short port);
/**
* @brief get default port string for one scheme string
* @param[in] scheme scheme string
* @return port string const pointer
* @retval NULL fail, scheme not found
* @retval not NULL success
*/
static const char *get_default_port(const std::string& scheme);
/**
* @brief get current global settings
* @return current global settings const pointer
* @note returnval never NULL
*/
static const struct WFGlobalSettings *get_global_settings()
{
return &settings_;
}
static void set_global_settings(const struct WFGlobalSettings *settings)
{
settings_ = *settings;
}
static const char *get_error_string(int state, int error);
static bool increase_compute_thread()
{
return WFGlobal::get_compute_executor()->increase_thread() == 0;
}
static bool decrease_compute_thread()
{
return WFGlobal::get_compute_executor()->decrease_thread() == 0;
}
// Internal usage only
public:
static bool is_scheduler_created();
static class CommScheduler *get_scheduler();
static SSL_CTX *get_ssl_client_ctx();
static SSL_CTX *new_ssl_server_ctx();
static class ExecQueue *get_exec_queue(const std::string& queue_name);
static class Executor *get_compute_executor();
static class IOService *get_io_service();
static class ExecQueue *get_dns_queue();
static class Executor *get_dns_executor();
static class WFDnsClient *get_dns_client();
static class WFResourcePool *get_dns_respool();
static class RouteManager *get_route_manager()
{
return &route_manager_;
}
static class DnsCache *get_dns_cache()
{
return &dns_cache_;
}
static class WFDnsResolver *get_dns_resolver()
{
return &dns_resolver_;
}
static class WFNameService *get_name_service()
{
return &name_service_;
}
public:
static int sync_operation_begin();
static void sync_operation_end(int cookie);
private:
static struct WFGlobalSettings settings_;
static RouteManager route_manager_;
static DnsCache dns_cache_;
static WFDnsResolver dns_resolver_;
static WFNameService name_service_;
};
#endif
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