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90 lines
2.5 KiB
90 lines
2.5 KiB
/*
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Copyright (c) 2020 Sogou, Inc.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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Author: Xie Han (xiehan@sogou-inc.com)
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*/
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#ifndef _WFMYSQLCONNECTION_H_
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#define _WFMYSQLCONNECTION_H_
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#include <string>
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#include <utility>
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#include <functional>
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#include <openssl/ssl.h>
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#include "URIParser.h"
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#include "WFTaskFactory.h"
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class WFMySQLConnection
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{
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public:
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/* example: mysql://username:passwd@127.0.0.1/dbname?character_set=utf8
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* IP string is recommmended in url. When using a domain name, the first
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* address resovled will be used. Don't use upstream name as a host. */
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int init(const std::string& url)
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{
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return this->init(url, NULL);
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}
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int init(const std::string& url, SSL_CTX *ssl_ctx);
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void deinit() { }
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public:
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WFMySQLTask *create_query_task(const std::string& query,
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mysql_callback_t callback)
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{
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WFMySQLTask *task = WFTaskFactory::create_mysql_task(this->uri, 0,
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std::move(callback));
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this->set_ssl_ctx(task);
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task->get_req()->set_query(query);
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return task;
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}
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/* If you don't disconnect manually, the TCP connection will be
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* kept alive after this object is deleted, and maybe reused by
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* another WFMySQLConnection object with same id and url. */
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WFMySQLTask *create_disconnect_task(mysql_callback_t callback)
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{
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WFMySQLTask *task = this->create_query_task("", std::move(callback));
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this->set_ssl_ctx(task);
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task->set_keep_alive(0);
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return task;
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}
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protected:
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void set_ssl_ctx(WFMySQLTask *task) const
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{
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using MySQLRequest = protocol::MySQLRequest;
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using MySQLResponse = protocol::MySQLResponse;
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auto *t = (WFComplexClientTask<MySQLRequest, MySQLResponse> *)task;
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/* 'ssl_ctx' can be NULL and will use default. */
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t->set_ssl_ctx(this->ssl_ctx);
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}
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protected:
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ParsedURI uri;
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SSL_CTX *ssl_ctx;
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int id;
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public:
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/* Make sure that concurrent connections have different id.
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* When a connection object is deleted, id can be reused. */
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WFMySQLConnection(int id) { this->id = id; }
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virtual ~WFMySQLConnection() { }
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};
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#endif
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