mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-11-24 08:32:02 +00:00
352 lines
9.7 KiB
C++
352 lines
9.7 KiB
C++
#include "KeeperClient.h"
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#include "Commands.h"
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#include <Client/ReplxxLineReader.h>
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#include <Client/ClientBase.h>
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#include <Common/EventNotifier.h>
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#include <Common/filesystemHelpers.h>
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#include <Common/ZooKeeper/ZooKeeper.h>
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#include <Parsers/parseQuery.h>
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#include <Poco/Util/HelpFormatter.h>
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namespace DB
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{
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namespace ErrorCodes
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{
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extern const int BAD_ARGUMENTS;
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}
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String KeeperClient::executeFourLetterCommand(const String & command)
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{
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/// We need to create a new socket every time because ZooKeeper forcefully shuts down the connection after a four-letter-word command.
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Poco::Net::StreamSocket socket;
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socket.connect(Poco::Net::SocketAddress{zk_args.hosts[0]}, zk_args.connection_timeout_ms * 1000);
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socket.setReceiveTimeout(zk_args.operation_timeout_ms * 1000);
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socket.setSendTimeout(zk_args.operation_timeout_ms * 1000);
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socket.setNoDelay(true);
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ReadBufferFromPocoSocket in(socket);
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WriteBufferFromPocoSocket out(socket);
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out.write(command.data(), command.size());
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out.next();
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String result;
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readStringUntilEOF(result, in);
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in.next();
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return result;
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}
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std::vector<String> KeeperClient::getCompletions(const String & prefix) const
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{
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Tokens tokens(prefix.data(), prefix.data() + prefix.size(), 0, false);
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IParser::Pos pos(tokens, 0);
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if (pos->type != TokenType::BareWord)
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return registered_commands_and_four_letter_words;
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++pos;
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if (pos->isEnd())
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return registered_commands_and_four_letter_words;
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ParserToken{TokenType::Whitespace}.ignore(pos);
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std::vector<String> result;
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String string_path;
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Expected expected;
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if (!parseKeeperPath(pos, expected, string_path))
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string_path = cwd;
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if (!pos->isEnd())
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return result;
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fs::path path = string_path;
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String parent_path;
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if (string_path.ends_with("/"))
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parent_path = getAbsolutePath(string_path);
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else
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parent_path = getAbsolutePath(path.parent_path());
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try
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{
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for (const auto & child : zookeeper->getChildren(parent_path))
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result.push_back(child);
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}
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catch (Coordination::Exception &) {}
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std::sort(result.begin(), result.end());
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return result;
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}
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void KeeperClient::askConfirmation(const String & prompt, std::function<void()> && callback)
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{
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std::cout << prompt << " Continue?\n";
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need_confirmation = true;
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confirmation_callback = callback;
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}
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fs::path KeeperClient::getAbsolutePath(const String & relative) const
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{
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String result;
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if (relative.starts_with('/'))
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result = fs::weakly_canonical(relative);
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else
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result = fs::weakly_canonical(cwd / relative);
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if (result.ends_with('/') && result.size() > 1)
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result.pop_back();
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return result;
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}
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void KeeperClient::loadCommands(std::vector<Command> && new_commands)
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{
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for (const auto & command : new_commands)
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{
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String name = command->getName();
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commands.insert({name, command});
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registered_commands_and_four_letter_words.push_back(std::move(name));
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}
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for (const auto & command : four_letter_word_commands)
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registered_commands_and_four_letter_words.push_back(command);
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std::sort(registered_commands_and_four_letter_words.begin(), registered_commands_and_four_letter_words.end());
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}
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void KeeperClient::defineOptions(Poco::Util::OptionSet & options)
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{
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Poco::Util::Application::defineOptions(options);
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options.addOption(
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Poco::Util::Option("help", "", "show help and exit")
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.binding("help"));
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options.addOption(
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Poco::Util::Option("host", "h", "server hostname. default `localhost`")
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.argument("<host>")
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.binding("host"));
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options.addOption(
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Poco::Util::Option("port", "p", "server port. default `9181`")
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.argument("<port>")
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.binding("port"));
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options.addOption(
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Poco::Util::Option("query", "q", "will execute given query, then exit.")
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.argument("<query>")
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.binding("query"));
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options.addOption(
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Poco::Util::Option("connection-timeout", "", "set connection timeout in seconds. default 10s.")
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.argument("<seconds>")
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.binding("connection-timeout"));
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options.addOption(
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Poco::Util::Option("session-timeout", "", "set session timeout in seconds. default 10s.")
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.argument("<seconds>")
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.binding("session-timeout"));
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options.addOption(
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Poco::Util::Option("operation-timeout", "", "set operation timeout in seconds. default 10s.")
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.argument("<seconds>")
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.binding("operation-timeout"));
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options.addOption(
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Poco::Util::Option("history-file", "", "set path of history file. default `~/.keeper-client-history`")
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.argument("<file>")
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.binding("history-file"));
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options.addOption(
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Poco::Util::Option("log-level", "", "set log level")
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.argument("<level>")
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.binding("log-level"));
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}
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void KeeperClient::initialize(Poco::Util::Application & /* self */)
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{
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suggest.setCompletionsCallback(
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[&](const String & prefix, size_t /* prefix_length */) { return getCompletions(prefix); });
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loadCommands({
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std::make_shared<LSCommand>(),
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std::make_shared<CDCommand>(),
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std::make_shared<SetCommand>(),
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std::make_shared<CreateCommand>(),
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std::make_shared<GetCommand>(),
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std::make_shared<RMCommand>(),
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std::make_shared<RMRCommand>(),
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std::make_shared<HelpCommand>(),
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std::make_shared<FourLetterWordCommand>(),
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});
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String home_path;
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const char * home_path_cstr = getenv("HOME"); // NOLINT(concurrency-mt-unsafe)
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if (home_path_cstr)
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home_path = home_path_cstr;
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if (config().has("history-file"))
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history_file = config().getString("history-file");
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else
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history_file = home_path + "/.keeper-client-history";
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if (!history_file.empty() && !fs::exists(history_file))
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{
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try
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{
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FS::createFile(history_file);
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}
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catch (const ErrnoException & e)
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{
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if (e.getErrno() != EEXIST)
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throw;
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}
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}
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Poco::Logger::root().setLevel(config().getString("log-level", "error"));
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EventNotifier::init();
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}
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void KeeperClient::executeQuery(const String & query)
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{
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std::vector<String> queries;
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boost::algorithm::split(queries, query, boost::is_any_of(";"));
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for (const auto & query_text : queries)
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{
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if (!query_text.empty())
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processQueryText(query_text);
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}
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}
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bool KeeperClient::processQueryText(const String & text)
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{
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if (exit_strings.find(text) != exit_strings.end())
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return false;
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try
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{
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if (need_confirmation)
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{
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need_confirmation = false;
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if (text.size() == 1 && (text == "y" || text == "Y"))
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confirmation_callback();
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return true;
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}
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KeeperParser parser;
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String message;
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const char * begin = text.data();
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ASTPtr res = tryParseQuery(parser, begin, begin + text.size(), message, true, "", false, 0, 0, false);
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if (!res)
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{
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std::cerr << message << "\n";
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return true;
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}
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auto * query = res->as<ASTKeeperQuery>();
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auto command = KeeperClient::commands.find(query->command);
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command->second->execute(query, this);
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}
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catch (Coordination::Exception & err)
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{
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std::cerr << err.message() << "\n";
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}
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return true;
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}
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void KeeperClient::runInteractive()
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{
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LineReader::Patterns query_extenders = {"\\"};
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LineReader::Patterns query_delimiters = {};
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char word_break_characters[] = " \t\v\f\a\b\r\n/";
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ReplxxLineReader lr(
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suggest,
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history_file,
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/* multiline= */ false,
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query_extenders,
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query_delimiters,
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word_break_characters,
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/* highlighter_= */ {});
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lr.enableBracketedPaste();
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while (true)
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{
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String prompt;
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if (need_confirmation)
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prompt = "[y/n] ";
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else
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prompt = cwd.string() + " :) ";
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auto input = lr.readLine(prompt, ":-] ");
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if (input.empty())
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break;
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if (!processQueryText(input))
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break;
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}
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}
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int KeeperClient::main(const std::vector<String> & /* args */)
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{
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if (config().hasOption("help"))
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{
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Poco::Util::HelpFormatter help_formatter(KeeperClient::options());
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auto header_str = fmt::format("{} [OPTION]\n", commandName());
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help_formatter.setHeader(header_str);
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help_formatter.format(std::cout);
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return 0;
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}
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auto host = config().getString("host", "localhost");
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auto port = config().getString("port", "9181");
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zk_args.hosts = {host + ":" + port};
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zk_args.connection_timeout_ms = config().getInt("connection-timeout", 10) * 1000;
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zk_args.session_timeout_ms = config().getInt("session-timeout", 10) * 1000;
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zk_args.operation_timeout_ms = config().getInt("operation-timeout", 10) * 1000;
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zookeeper = std::make_unique<zkutil::ZooKeeper>(zk_args);
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if (config().has("query"))
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executeQuery(config().getString("query"));
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else
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runInteractive();
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return 0;
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}
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}
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int mainEntryClickHouseKeeperClient(int argc, char ** argv)
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{
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try
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{
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DB::KeeperClient client;
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client.init(argc, argv);
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return client.run();
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}
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catch (const DB::Exception & e)
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{
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std::cerr << DB::getExceptionMessage(e, false) << std::endl;
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return 1;
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}
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catch (const boost::program_options::error & e)
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{
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std::cerr << "Bad arguments: " << e.what() << std::endl;
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return DB::ErrorCodes::BAD_ARGUMENTS;
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}
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catch (...)
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{
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std::cerr << DB::getCurrentExceptionMessage(true) << std::endl;
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return 1;
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}
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}
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