node_db.cpp
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/*
* Copyright 2002-2014 the original author or 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
*
* CC/LICENSE
*
* 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 <exception.h>
#include "node_db.h"
#include "db_pool.h"
#include "common.h"
extern DBPool* g_dbpool;
NodeDB::NodeDB(const uint32_t id, const string& name,
const string& type, const string& desc, const key_map_t& keymap)
: NodeBase(id, name, type, desc, keymap) {
}
NodeDB::~NodeDB(void) {
}
NodeBase* NodeDB::run(base_script_t* param) {
IVR_TRACE("%s", enter(param->name_var_map).c_str());
Connection* conn = NULL;
Statement* state = NULL;
ResultSet* rs = NULL;
const char* exit = EXIT_FAIL;
conn = g_dbpool->get_connection(_connectid);
if (conn) {
state = conn->createStatement();
} else {
IVR_WARN("fetch connect failed");
goto END;
}
if (!state) {
IVR_WARN("create statement failed");
goto FREE;
}
try {
string sql;
if (!parse_all(_sql, param->name_var_map, sql)) {
IVR_WARN("parse all failed(%s)", _sql.c_str());
goto FREE;
}
IVR_TRACE("sql = %s", sql.c_str());
bool is_ret_rs = state->execute(sql.c_str());
if (is_ret_rs) { //表示返回了结果集 select
rs = state->getResultSet();
//如果不做以下处理，执行返回结果集的存储过程会有异常：
//HY000,Commands out of sync; you can't run this command now
while (state->getMoreResults());
map<string, variable_t>::iterator it = param->name_var_map.find(_rs_var_name);
if (it == param->name_var_map.end()) {
IVR_WARN("变量不存在");
goto FREE;
}
if (it->second.type != RESULTSET) {
IVR_WARN("变量类型不是RESULTSET");
goto FREE;
}
sql::ResultSet* result = (sql::ResultSet*)(it->second.pvalue);
if (result) {
delete result->getStatement();
delete result;
}
it->second.pvalue = rs;//在销毁变量的时候会整体销毁
exit = EXIT_SUCC;
} else { //表示未返回结果集 insert update delete
int32_t num = state->getUpdateCount();
if (num >= 0) {
exit = EXIT_SUCC;
}
}
} catch (sql::SQLException ex) {
IVR_WARN("数据库查询失败(%s,%s)", ex.getSQLStateCStr(), ex.what());
goto FREE;
} catch (...) {
IVR_WARN("数据库查询失败 抛出异常");
goto FREE;
}
FREE:
g_dbpool->free_connection(_connectid, conn);
END:
IVR_TRACE("%s exit from %s()",
leave(param->name_var_map).c_str(), exit);
return _exit_node_map[exit];
}
bool NodeDB::load_other() {
valid_str(_key_map, PARAM_RSNAME, _rs_var_name); //不关心是否存在
std::string tmp;
if (NodeBase::load_other()
&& valid_str(_key_map, PARAM_SQL, _sql, false)
&& valid_str(_key_map, PARAM_CONNID, tmp)) {
_connectid = atoi(tmp.c_str());
return true;
}
return false;
}
std::string NodeDB::enter(const map<string, variable_t>& vars)const {
ostringstream ostm;
ostm << NodeBase::enter(vars);
ostm << "connid:" << _connectid << ",rsname:" << _rs_var_name << ",sql:" << _sql;
return ostm.str();
}
std::string NodeDB::leave(const map<string, variable_t>& vars)const {
ostringstream ostm;
ostm << NodeBase::leave(vars);
ostm << "connid:" << _connectid;
return ostm.str();
}
const char* NodeDB::PARAM_CONNID = "connectid";
const char* NodeDB::PARAM_SQL = "sql";
const char* NodeDB::PARAM_RSNAME = "rsvarname";