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105 lines
2.5 KiB
C++
105 lines
2.5 KiB
C++
#include <iostream>
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#include <boost/program_options.hpp>
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#include <DB/Core/Exception.h>
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#include <Poco/Event.h>
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#include <zkutil/ZooKeeper.h>
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/** Выводит в произвольном порядке пути всех узлов ZK. Возможно, только в указанной директории.
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*/
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struct CallbackState
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{
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std::string path;
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std::list<CallbackState>::const_iterator it;
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};
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using CallbackStates = std::list<CallbackState>;
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CallbackStates states;
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zkutil::ZooKeeper * zookeeper;
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std::mutex mutex;
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Poco::Event completed;
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void process(const CallbackState & state);
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void callback(
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int rc,
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const String_vector * strings,
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const Stat * stat,
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const void * data)
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{
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std::lock_guard<std::mutex> lock(mutex);
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const CallbackState * state = reinterpret_cast<const CallbackState *>(data);
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if (rc != ZOK && rc != ZNONODE)
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{
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std::cerr << zerror(rc) << ", path: " << state->path << "\n";
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completed.set();
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}
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for (int32_t i = 0; i < strings->count; ++i)
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{
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states.emplace_back();
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states.back().path = state->path + (state->path == "/" ? "" : "/") + strings->data[i];
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states.back().it = --states.end();
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std::cout << states.back().path << '\n';
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process(states.back());
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}
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states.erase(state->it);
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if (states.empty())
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completed.set();
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}
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void process(const CallbackState & state)
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{
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zoo_awget_children2(zookeeper->getHandle(), state.path.data(), nullptr, nullptr, callback, &state);
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}
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int main(int argc, char ** argv)
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try
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{
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boost::program_options::options_description desc("Allowed options");
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desc.add_options()
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("help,h", "produce help message")
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("address,a", boost::program_options::value<std::string>()->required(),
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"addresses of ZooKeeper instances, comma separated. Example: example01e.yandex.ru:2181")
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("path,p", boost::program_options::value<std::string>()->default_value("/"),
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"where to start")
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;
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boost::program_options::variables_map options;
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boost::program_options::store(boost::program_options::parse_command_line(argc, argv, desc), options);
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if (options.count("help"))
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{
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std::cout << "Dump paths of all nodes in ZooKeeper." << std::endl;
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std::cout << "Usage: " << argv[0] << " [options]" << std::endl;
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std::cout << desc << std::endl;
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return 1;
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}
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zkutil::ZooKeeper zookeeper_(options.at("address").as<std::string>());
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zookeeper = &zookeeper_;
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states.emplace_back();
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states.back().path = options.at("path").as<std::string>();
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states.back().it = --states.end();
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process(states.back());
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completed.wait();
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}
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catch (...)
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{
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std::cerr << DB::getCurrentExceptionMessage(true) << '\n';
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throw;
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}
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