mirror of
https://github.com/ClickHouse/ClickHouse.git
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104 lines
4.0 KiB
C++
104 lines
4.0 KiB
C++
#include <iostream>
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#include <boost/program_options.hpp>
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#include <Poco/Logger.h>
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#include <Poco/ConsoleChannel.h>
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#include <Poco/FormattingChannel.h>
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#include <Poco/PatternFormatter.h>
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#include <Poco/AutoPtr.h>
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#include <Poco/Util/XMLConfiguration.h>
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#include <Common/ZooKeeper/ZooKeeperNodeCache.h>
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#include <Common/Config/ConfigProcessor.h>
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#include <Common/Exception.h>
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static void setupLogging(const std::string & log_level)
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{
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Poco::AutoPtr<Poco::ConsoleChannel> channel(new Poco::ConsoleChannel);
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Poco::AutoPtr<Poco::PatternFormatter> formatter(new Poco::PatternFormatter);
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formatter->setProperty("pattern", "%L%Y-%m-%d %H:%M:%S.%i <%p> %s: %t");
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Poco::AutoPtr<Poco::FormattingChannel> formatting_channel(new Poco::FormattingChannel(formatter, channel));
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Poco::Logger::root().setChannel(formatting_channel);
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Poco::Logger::root().setLevel(log_level);
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}
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static std::string extractFromConfig(
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const std::string & config_path, const std::string & key, bool process_zk_includes, bool try_get = false)
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{
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DB::ConfigProcessor processor(config_path, /* throw_on_bad_incl = */ false, /* log_to_console = */ false);
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bool has_zk_includes;
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DB::XMLDocumentPtr config_xml = processor.processConfig(&has_zk_includes);
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if (has_zk_includes && process_zk_includes)
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{
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DB::ConfigurationPtr bootstrap_configuration(new Poco::Util::XMLConfiguration(config_xml));
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zkutil::ZooKeeperPtr zookeeper = std::make_shared<zkutil::ZooKeeper>(
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*bootstrap_configuration, "zookeeper");
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zkutil::ZooKeeperNodeCache zk_node_cache([&] { return zookeeper; });
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config_xml = processor.processConfig(&has_zk_includes, &zk_node_cache);
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}
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DB::ConfigurationPtr configuration(new Poco::Util::XMLConfiguration(config_xml));
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// do not throw exception if not found
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if (try_get)
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return configuration->getString(key, "");
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return configuration->getString(key);
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}
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#pragma GCC diagnostic ignored "-Wunused-function"
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#pragma GCC diagnostic ignored "-Wmissing-declarations"
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int mainEntryClickHouseExtractFromConfig(int argc, char ** argv)
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{
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bool print_stacktrace = false;
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bool process_zk_includes = false;
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bool try_get = false;
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std::string log_level;
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std::string config_path;
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std::string key;
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namespace po = boost::program_options;
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po::options_description options_desc("Allowed options");
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options_desc.add_options()
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("help", "produce this help message")
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("stacktrace", po::bool_switch(&print_stacktrace), "print stack traces of exceptions")
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("process-zk-includes", po::bool_switch(&process_zk_includes),
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"if there are from_zk elements in config, connect to ZooKeeper and process them")
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("try", po::bool_switch(&try_get), "Do not warn about missing keys")
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("log-level", po::value<std::string>(&log_level)->default_value("error"), "log level")
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("config-file,c", po::value<std::string>(&config_path)->required(), "path to config file")
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("key,k", po::value<std::string>(&key)->required(), "key to get value for");
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po::positional_options_description positional_desc;
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positional_desc.add("config-file", 1);
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positional_desc.add("key", 1);
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try
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{
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po::variables_map options;
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po::store(po::command_line_parser(argc, argv).options(options_desc).positional(positional_desc).run(), options);
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if (options.count("help"))
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{
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std::cerr << "Preprocess config file and extract value of the given key." << std::endl
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<< std::endl;
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std::cerr << "Usage: clickhouse extract-from-config [options]" << std::endl
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<< std::endl;
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std::cerr << options_desc << std::endl;
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return 0;
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}
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po::notify(options);
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setupLogging(log_level);
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std::cout << extractFromConfig(config_path, key, process_zk_includes, try_get) << std::endl;
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}
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catch (...)
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{
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std::cerr << DB::getCurrentExceptionMessage(print_stacktrace, true) << std::endl;
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return DB::getCurrentExceptionCode();
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}
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return 0;
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}
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