dmpserviceregistry.cpp
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/**************************************************************************
* file: dmpserviceregistry.cpp
* Author: wanzhongping
* Date: 2020-12-23 15:53:11
* Email: zhongpingw@chinadci.com
* copyright: 广州城市信息研究所有限公司
***************************************************************************/
#include "dmpserviceregistry.h"
#include "dmpservice.h"
#include <boost/format.hpp>
#include <boost/algorithm/string.hpp>
namespace
{
string MakeServiceKey(const string &name, const string &version)
{
boost::format fmt = boost::format("%1%_%2%") % name % version;
return fmt.str();
}
bool IsVersionGreater(const string &v1, const string &v2)
{
vector<string> vecSeg1;
boost::split(vecSeg1, v1, boost::is_any_of("."), boost::token_compress_on);
vector<string> vecSeg2;
boost::split(vecSeg2, v2, boost::is_any_of("."), boost::token_compress_on);
vector<string>::iterator it1 = vecSeg1.begin();
vector<string>::iterator it2 = vecSeg2.begin();
bool isint;
while (it1 != vecSeg1.end() && it2 != vecSeg2.end())
{
if (*it1 != *it2)
{
// Compare as numbers
int i1 = atoi(it1->c_str());
int i2 = atoi(it2->c_str());
if (i1 != i2)
{
return i1 > i2;
}
}
++it1;
++it2;
}
return false;
}
} // namespace
DmpServiceRegistry::~DmpServiceRegistry()
{
CleanUp();
std::cout << "Destructing DmpServiceRegistry" << std::endl;
}
void DmpServiceRegistry::Init(const boost::filesystem::path &module_path)
{
nativeLoader_.LoadModules(module_path, *this);
}
std::shared_ptr<DmpService> DmpServiceRegistry::GetService(const string &name, const string &version)
{
std::shared_ptr<DmpService> sp_service = nullptr;
string key;
string nameUpper = boost::to_upper_copy(name);
VersionMap::const_iterator it = serviceVersions_.find(nameUpper);
if (it != serviceVersions_.end())
{
key = version.empty() ? it->second.second : MakeServiceKey(nameUpper, version);
ServiceMap::const_iterator iter = services_.find(key);
if (iter != services_.end())
{
sp_service = iter->second;
}
else
{
// Return the default version
//QgsMessageLog::logMessage(QString("Service %1 %2 not found, returning default").arg(name, version));
sp_service = services_[it->second.second];
}
}
else
{
//QgsMessageLog::logMessage(QString("Service %1 is not registered").arg(name));
}
return sp_service;
}
void DmpServiceRegistry::RegisterService(std::shared_ptr<DmpService> service)
{
string name = service->Name();
boost::to_upper(name);
string version = service->Version();
string key = MakeServiceKey(name, version);
if (services_.find(key) != services_.end()){
return;
}
services_[key] = service;
if (serviceVersions_.find(name) == serviceVersions_.end()){
serviceVersions_.insert(pair<string, pair<string, string>>(name, pair<string, string>(version, key)));
}
}
int DmpServiceRegistry::UnregisterService(const string &name, const string &version)
{
int removed = 0;
VersionMap::const_iterator it = serviceVersions_.find(name);
if (it != serviceVersions_.end())
{
if (version.empty())
{
ServiceMap::iterator iter = services_.begin();
while (iter != services_.end())
{
if (iter->second->Name() == name)
{
//QgsMessageLog::logMessage( QString( "Unregistering service %1 %2" ).arg( name, ( *it )->version() ) );
iter = services_.erase(iter);
++removed;
}
else
{
++iter;
}
}
serviceVersions_.erase(it);
}
else
{
string key = MakeServiceKey(name, version);
ServiceMap::iterator found = services_.find(key);
if (found != services_.end())
{
//QgsMessageLog::logMessage( QString( "Unregistering service %1 %2" ).arg( name, version ) );
services_.erase(found);
removed = 1;
//findGreaterVersion为匿名函数
string maxVer;
std::function<void(const ServiceMap::value_type &)>
findGreaterVersion = [name, &maxVer](const ServiceMap::value_type &item) {
if (item.second->Name() == name &&
(maxVer.empty() || IsVersionGreater(item.second->Version(), maxVer)))
maxVer = item.second->Version();
};
serviceVersions_.erase(name);
std::for_each(services_.begin(), services_.end(), findGreaterVersion);
if (!maxVer.empty())
{
// Set the new default service
string key = MakeServiceKey(name, maxVer);
serviceVersions_.insert(pair<string, pair<string, string>>(name, pair<string, string>(version, key)));
}
}
}
}
return removed;
}
void DmpServiceRegistry::CleanUp()
{
serviceVersions_.clear();
services_.clear();
nativeLoader_.UnloadModules();
}