ClickHouse/utils/zookeeper-dump-tree/main.cpp

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#include <list>
#include <iostream>
#include <boost/program_options.hpp>
#include <Common/Exception.h>
#include <Common/ZooKeeper/ZooKeeper.h>
2018-04-03 17:35:48 +00:00
#include <Common/ZooKeeper/KeeperException.h>
int main(int argc, char ** argv)
try
{
boost::program_options::options_description desc("Allowed options");
desc.add_options()
("help,h", "produce help message")
("address,a", boost::program_options::value<std::string>()->required(),
"addresses of ZooKeeper instances, comma separated. Example: example01e.yandex.ru:2181")
("path,p", boost::program_options::value<std::string>()->default_value("/"),
"where to start")
;
boost::program_options::variables_map options;
boost::program_options::store(boost::program_options::parse_command_line(argc, argv, desc), options);
if (options.count("help"))
{
std::cout << "Dump paths of all nodes in ZooKeeper." << std::endl;
std::cout << "Usage: " << argv[0] << " [options]" << std::endl;
std::cout << desc << std::endl;
return 1;
}
zkutil::ZooKeeper zookeeper(options.at("address").as<std::string>());
std::string initial_path = options.at("path").as<std::string>();
std::list<std::pair<std::string, std::future<zkutil::ListResponse>>> list_futures;
list_futures.emplace_back(initial_path, zookeeper.asyncGetChildren(initial_path));
for (auto it = list_futures.begin(); it != list_futures.end(); ++it)
{
zkutil::ListResponse response;
try
{
response = it->second.get();
}
catch (const zkutil::KeeperException & e)
{
if (e.code == ZooKeeperImpl::ZooKeeper::ZNONODE)
continue;
throw;
}
std::cout << it->first << '\t' << response.stat.numChildren << '\t' << response.stat.dataLength << '\n';
for (const auto & name : response.names)
{
std::string child_path = it->first == "/" ? it->first + name : it->first + '/' + name;
list_futures.emplace_back(child_path, zookeeper.asyncGetChildren(child_path));
}
}
}
catch (...)
{
std::cerr << DB::getCurrentExceptionMessage(true) << '\n';
throw;
}