mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-12-16 11:22:12 +00:00
561 lines
17 KiB
C++
561 lines
17 KiB
C++
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#include "Commands.h"
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#include <queue>
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#include "KeeperClient.h"
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#include "Parsers/CommonParsers.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 KEEPER_EXCEPTION;
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extern const int UNEXPECTED_ZOOKEEPER_ERROR;
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}
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bool LSCommand::parse(IParser::Pos & pos, std::shared_ptr<ASTKeeperQuery> & node, Expected & expected) const
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{
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String path;
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if (!parseKeeperPath(pos, expected, path))
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return true;
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node->args.push_back(std::move(path));
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return true;
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}
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void LSCommand::execute(const ASTKeeperQuery * query, KeeperClient * client) const
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{
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String path;
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if (!query->args.empty())
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path = client->getAbsolutePath(query->args[0].safeGet<String>());
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else
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path = client->cwd;
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auto children = client->zookeeper->getChildren(path);
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std::sort(children.begin(), children.end());
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bool need_space = false;
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for (const auto & child : children)
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{
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if (std::exchange(need_space, true))
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std::cout << " ";
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std::cout << child;
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}
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std::cout << "\n";
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}
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bool CDCommand::parse(IParser::Pos & pos, std::shared_ptr<ASTKeeperQuery> & node, Expected & expected) const
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{
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String path;
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if (!parseKeeperPath(pos, expected, path))
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return true;
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node->args.push_back(std::move(path));
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return true;
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}
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void CDCommand::execute(const ASTKeeperQuery * query, KeeperClient * client) const
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{
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if (query->args.empty())
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return;
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auto new_path = client->getAbsolutePath(query->args[0].safeGet<String>());
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if (!client->zookeeper->exists(new_path))
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std::cerr << "Path " << new_path << " does not exists\n";
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else
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client->cwd = new_path;
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}
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bool SetCommand::parse(IParser::Pos & pos, std::shared_ptr<ASTKeeperQuery> & node, Expected & expected) const
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{
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String path;
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if (!parseKeeperPath(pos, expected, path))
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return false;
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node->args.push_back(std::move(path));
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String arg;
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if (!parseKeeperArg(pos, expected, arg))
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return false;
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node->args.push_back(std::move(arg));
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ASTPtr version;
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if (ParserNumber{}.parse(pos, version, expected))
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node->args.push_back(version->as<ASTLiteral &>().value);
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return true;
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}
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void SetCommand::execute(const ASTKeeperQuery * query, KeeperClient * client) const
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{
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if (query->args.size() == 2)
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client->zookeeper->set(client->getAbsolutePath(query->args[0].safeGet<String>()), query->args[1].safeGet<String>());
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else
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client->zookeeper->set(
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client->getAbsolutePath(query->args[0].safeGet<String>()),
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query->args[1].safeGet<String>(),
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static_cast<Int32>(query->args[2].get<Int32>()));
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}
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bool CreateCommand::parse(IParser::Pos & pos, std::shared_ptr<ASTKeeperQuery> & node, Expected & expected) const
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{
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String path;
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if (!parseKeeperPath(pos, expected, path))
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return false;
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node->args.push_back(std::move(path));
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String arg;
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if (!parseKeeperArg(pos, expected, arg))
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return false;
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node->args.push_back(std::move(arg));
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int mode = zkutil::CreateMode::Persistent;
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if (ParserKeyword(Keyword::PERSISTENT).ignore(pos, expected))
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mode = zkutil::CreateMode::Persistent;
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else if (ParserKeyword(Keyword::EPHEMERAL).ignore(pos, expected))
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mode = zkutil::CreateMode::Ephemeral;
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else if (ParserKeyword(Keyword::EPHEMERAL_SEQUENTIAL).ignore(pos, expected))
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mode = zkutil::CreateMode::EphemeralSequential;
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else if (ParserKeyword(Keyword::PERSISTENT_SEQUENTIAL).ignore(pos, expected))
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mode = zkutil::CreateMode::PersistentSequential;
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node->args.push_back(std::move(mode));
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return true;
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}
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void CreateCommand::execute(const ASTKeeperQuery * query, KeeperClient * client) const
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{
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client->zookeeper->create(
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client->getAbsolutePath(query->args[0].safeGet<String>()),
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query->args[1].safeGet<String>(),
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static_cast<int>(query->args[2].safeGet<Int64>()));
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}
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bool TouchCommand::parse(IParser::Pos & pos, std::shared_ptr<ASTKeeperQuery> & node, Expected & expected) const
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{
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String arg;
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if (!parseKeeperPath(pos, expected, arg))
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return false;
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node->args.push_back(std::move(arg));
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return true;
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}
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void TouchCommand::execute(const ASTKeeperQuery * query, KeeperClient * client) const
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{
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client->zookeeper->createIfNotExists(client->getAbsolutePath(query->args[0].safeGet<String>()), "");
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}
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bool GetCommand::parse(IParser::Pos & pos, std::shared_ptr<ASTKeeperQuery> & node, Expected & expected) const
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{
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String path;
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if (!parseKeeperPath(pos, expected, path))
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return false;
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node->args.push_back(std::move(path));
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return true;
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}
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void GetCommand::execute(const ASTKeeperQuery * query, KeeperClient * client) const
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{
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std::cout << client->zookeeper->get(client->getAbsolutePath(query->args[0].safeGet<String>())) << "\n";
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}
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bool ExistsCommand::parse(IParser::Pos & pos, std::shared_ptr<ASTKeeperQuery> & node, DB::Expected & expected) const
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{
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String path;
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if (!parseKeeperPath(pos, expected, path))
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return false;
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node->args.push_back(std::move(path));
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return true;
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}
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void ExistsCommand::execute(const DB::ASTKeeperQuery * query, DB::KeeperClient * client) const
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{
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std::cout << client->zookeeper->exists(client->getAbsolutePath(query->args[0].safeGet<String>())) << "\n";
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}
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bool GetStatCommand::parse(IParser::Pos & pos, std::shared_ptr<ASTKeeperQuery> & node, Expected & expected) const
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{
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String path;
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if (!parseKeeperPath(pos, expected, path))
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return true;
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node->args.push_back(std::move(path));
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return true;
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}
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void GetStatCommand::execute(const ASTKeeperQuery * query, KeeperClient * client) const
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{
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Coordination::Stat stat;
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String path;
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if (!query->args.empty())
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path = client->getAbsolutePath(query->args[0].safeGet<String>());
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else
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path = client->cwd;
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client->zookeeper->get(path, &stat);
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std::cout << "cZxid = " << stat.czxid << "\n";
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std::cout << "mZxid = " << stat.mzxid << "\n";
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std::cout << "pZxid = " << stat.pzxid << "\n";
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std::cout << "ctime = " << stat.ctime << "\n";
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std::cout << "mtime = " << stat.mtime << "\n";
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std::cout << "version = " << stat.version << "\n";
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std::cout << "cversion = " << stat.cversion << "\n";
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std::cout << "aversion = " << stat.aversion << "\n";
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std::cout << "ephemeralOwner = " << stat.ephemeralOwner << "\n";
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std::cout << "dataLength = " << stat.dataLength << "\n";
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std::cout << "numChildren = " << stat.numChildren << "\n";
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}
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bool FindSuperNodes::parse(IParser::Pos & pos, std::shared_ptr<ASTKeeperQuery> & node, Expected & expected) const
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{
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ASTPtr threshold;
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if (!ParserUnsignedInteger{}.parse(pos, threshold, expected))
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return false;
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node->args.push_back(threshold->as<ASTLiteral &>().value);
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ParserToken{TokenType::Whitespace}.ignore(pos);
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String path;
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if (!parseKeeperPath(pos, expected, path))
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path = ".";
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node->args.push_back(std::move(path));
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return true;
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}
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void FindSuperNodes::execute(const ASTKeeperQuery * query, KeeperClient * client) const
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{
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auto threshold = query->args[0].safeGet<UInt64>();
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auto path = client->getAbsolutePath(query->args[1].safeGet<String>());
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Coordination::Stat stat;
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if (!client->zookeeper->exists(path, &stat))
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return; /// It is ok if node was deleted meanwhile
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if (stat.numChildren >= static_cast<Int32>(threshold))
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std::cout << static_cast<String>(path) << "\t" << stat.numChildren << "\n";
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Strings children;
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auto status = client->zookeeper->tryGetChildren(path, children);
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if (status == Coordination::Error::ZNONODE)
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return; /// It is ok if node was deleted meanwhile
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else if (status != Coordination::Error::ZOK)
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throw DB::Exception(DB::ErrorCodes::KEEPER_EXCEPTION, "Error {} while getting children of {}", status, path.string());
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std::sort(children.begin(), children.end());
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auto next_query = *query;
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for (const auto & child : children)
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{
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next_query.args[1] = DB::Field(path / child);
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execute(&next_query, client);
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}
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}
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bool DeleteStaleBackups::parse(IParser::Pos & /* pos */, std::shared_ptr<ASTKeeperQuery> & /* node */, Expected & /* expected */) const
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{
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return true;
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}
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void DeleteStaleBackups::execute(const ASTKeeperQuery * /* query */, KeeperClient * client) const
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{
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client->askConfirmation(
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"You are going to delete all inactive backups in /clickhouse/backups.",
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[client]
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{
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fs::path backup_root = "/clickhouse/backups";
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auto backups = client->zookeeper->getChildren(backup_root);
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std::sort(backups.begin(), backups.end());
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for (const auto & child : backups)
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{
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auto backup_path = backup_root / child;
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std::cout << "Found backup " << backup_path << ", checking if it's active\n";
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String stage_path = backup_path / "stage";
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auto stages = client->zookeeper->getChildren(stage_path);
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bool is_active = false;
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for (const auto & stage : stages)
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{
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if (startsWith(stage, "alive"))
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{
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is_active = true;
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break;
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}
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}
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if (is_active)
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{
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std::cout << "Backup " << backup_path << " is active, not going to delete\n";
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continue;
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}
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std::cout << "Backup " << backup_path << " is not active, deleting it\n";
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client->zookeeper->removeRecursive(backup_path);
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}
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});
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}
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bool FindBigFamily::parse(IParser::Pos & pos, std::shared_ptr<ASTKeeperQuery> & node, Expected & expected) const
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{
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String path;
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if (!parseKeeperPath(pos, expected, path))
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path = ".";
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node->args.push_back(std::move(path));
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ASTPtr count;
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if (ParserUnsignedInteger{}.parse(pos, count, expected))
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node->args.push_back(count->as<ASTLiteral &>().value);
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else
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node->args.push_back(UInt64(10));
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return true;
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}
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/// DFS the subtree and return the number of nodes in the subtree
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static Int64 traverse(const fs::path & path, KeeperClient * client, std::vector<std::tuple<Int64, String>> & result)
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{
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Int64 nodes_in_subtree = 1;
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Strings children;
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auto status = client->zookeeper->tryGetChildren(path, children);
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if (status == Coordination::Error::ZNONODE)
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return 0;
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else if (status != Coordination::Error::ZOK)
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throw DB::Exception(DB::ErrorCodes::KEEPER_EXCEPTION, "Error {} while getting children of {}", status, path.string());
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for (auto & child : children)
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nodes_in_subtree += traverse(path / child, client, result);
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result.emplace_back(nodes_in_subtree, path.string());
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return nodes_in_subtree;
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}
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void FindBigFamily::execute(const ASTKeeperQuery * query, KeeperClient * client) const
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{
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auto path = client->getAbsolutePath(query->args[0].safeGet<String>());
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auto n = query->args[1].safeGet<UInt64>();
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std::vector<std::tuple<Int64, String>> result;
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traverse(path, client, result);
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std::sort(result.begin(), result.end(), std::greater());
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for (UInt64 i = 0; i < std::min(result.size(), static_cast<size_t>(n)); ++i)
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std::cout << std::get<1>(result[i]) << "\t" << std::get<0>(result[i]) << "\n";
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}
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bool RMCommand::parse(IParser::Pos & pos, std::shared_ptr<ASTKeeperQuery> & node, Expected & expected) const
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{
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String path;
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if (!parseKeeperPath(pos, expected, path))
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return false;
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node->args.push_back(std::move(path));
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ASTPtr version;
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if (ParserNumber{}.parse(pos, version, expected))
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node->args.push_back(version->as<ASTLiteral &>().value);
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return true;
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}
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void RMCommand::execute(const ASTKeeperQuery * query, KeeperClient * client) const
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{
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Int32 version{-1};
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if (query->args.size() == 2)
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version = static_cast<Int32>(query->args[1].get<Int32>());
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client->zookeeper->remove(client->getAbsolutePath(query->args[0].safeGet<String>()), version);
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}
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bool RMRCommand::parse(IParser::Pos & pos, std::shared_ptr<ASTKeeperQuery> & node, Expected & expected) const
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{
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String path;
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if (!parseKeeperPath(pos, expected, path))
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return false;
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node->args.push_back(std::move(path));
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return true;
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}
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void RMRCommand::execute(const ASTKeeperQuery * query, KeeperClient * client) const
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{
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String path = client->getAbsolutePath(query->args[0].safeGet<String>());
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client->askConfirmation(
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"You are going to recursively delete path " + path, [client, path] { client->zookeeper->removeRecursive(path); });
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}
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bool ReconfigCommand::parse(IParser::Pos & pos, std::shared_ptr<ASTKeeperQuery> & node, DB::Expected & expected) const
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{
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ParserKeyword s_add(Keyword::ADD);
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ParserKeyword s_remove(Keyword::REMOVE);
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ParserKeyword s_set(Keyword::SET);
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ReconfigCommand::Operation operation;
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if (s_add.ignore(pos, expected))
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operation = ReconfigCommand::Operation::ADD;
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else if (s_remove.ignore(pos, expected))
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operation = ReconfigCommand::Operation::REMOVE;
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else if (s_set.ignore(pos, expected))
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operation = ReconfigCommand::Operation::SET;
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else
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return false;
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node->args.push_back(operation);
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ParserToken{TokenType::Whitespace}.ignore(pos);
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String arg;
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if (!parseKeeperArg(pos, expected, arg))
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return false;
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node->args.push_back(std::move(arg));
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return true;
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}
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void ReconfigCommand::execute(const DB::ASTKeeperQuery * query, DB::KeeperClient * client) const
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{
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String joining;
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String leaving;
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String new_members;
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auto operation = query->args[0].get<ReconfigCommand::Operation>();
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switch (operation)
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{
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case static_cast<UInt8>(ReconfigCommand::Operation::ADD):
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joining = query->args[1].safeGet<String>();
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break;
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case static_cast<UInt8>(ReconfigCommand::Operation::REMOVE):
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leaving = query->args[1].safeGet<String>();
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break;
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case static_cast<UInt8>(ReconfigCommand::Operation::SET):
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new_members = query->args[1].safeGet<String>();
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break;
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default:
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throw Exception(ErrorCodes::UNEXPECTED_ZOOKEEPER_ERROR, "Unexpected operation: {}", operation);
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}
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auto response = client->zookeeper->reconfig(joining, leaving, new_members);
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std::cout << response.value << '\n';
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}
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bool SyncCommand::parse(IParser::Pos & pos, std::shared_ptr<ASTKeeperQuery> & node, DB::Expected & expected) const
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{
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String path;
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if (!parseKeeperPath(pos, expected, path))
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return false;
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node->args.push_back(std::move(path));
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return true;
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}
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void SyncCommand::execute(const DB::ASTKeeperQuery * query, DB::KeeperClient * client) const
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{
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std::cout << client->zookeeper->sync(client->getAbsolutePath(query->args[0].safeGet<String>())) << "\n";
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}
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bool HelpCommand::parse(IParser::Pos & /* pos */, std::shared_ptr<ASTKeeperQuery> & /* node */, Expected & /* expected */) const
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{
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return true;
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}
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void HelpCommand::execute(const ASTKeeperQuery * /* query */, KeeperClient * /* client */) const
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{
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for (const auto & pair : KeeperClient::commands)
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std::cout << pair.second->generateHelpString() << "\n";
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}
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bool FourLetterWordCommand::parse(IParser::Pos & pos, std::shared_ptr<ASTKeeperQuery> & node, Expected & expected) const
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{
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expected.add(pos, "four-letter-word command");
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if (pos->type != TokenType::BareWord)
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return false;
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String cmd(pos->begin, pos->end);
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if (cmd.size() != 4)
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return false;
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++pos;
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node->args.push_back(std::move(cmd));
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return true;
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}
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void FourLetterWordCommand::execute(const ASTKeeperQuery * query, KeeperClient * client) const
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{
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std::cout << client->executeFourLetterCommand(query->args[0].safeGet<String>()) << "\n";
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}
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bool GetDirectChildrenNumberCommand::parse(IParser::Pos & pos, std::shared_ptr<ASTKeeperQuery> & node, Expected & expected) const
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{
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String path;
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if (!parseKeeperPath(pos, expected, path))
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path = ".";
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node->args.push_back(std::move(path));
|
|
|
|
return true;
|
|
}
|
|
|
|
void GetDirectChildrenNumberCommand::execute(const ASTKeeperQuery * query, KeeperClient * client) const
|
|
{
|
|
auto path = client->getAbsolutePath(query->args[0].safeGet<String>());
|
|
|
|
Coordination::Stat stat;
|
|
client->zookeeper->get(path, &stat);
|
|
|
|
std::cout << stat.numChildren << "\n";
|
|
}
|
|
|
|
bool GetAllChildrenNumberCommand::parse(IParser::Pos & pos, std::shared_ptr<ASTKeeperQuery> & node, Expected & expected) const
|
|
{
|
|
String path;
|
|
if (!parseKeeperPath(pos, expected, path))
|
|
path = ".";
|
|
|
|
node->args.push_back(std::move(path));
|
|
|
|
return true;
|
|
}
|
|
|
|
void GetAllChildrenNumberCommand::execute(const ASTKeeperQuery * query, KeeperClient * client) const
|
|
{
|
|
auto path = client->getAbsolutePath(query->args[0].safeGet<String>());
|
|
|
|
std::queue<fs::path> queue;
|
|
queue.push(path);
|
|
Coordination::Stat stat;
|
|
client->zookeeper->get(path, &stat);
|
|
|
|
int totalNumChildren = stat.numChildren;
|
|
while (!queue.empty())
|
|
{
|
|
auto next_path = queue.front();
|
|
queue.pop();
|
|
|
|
auto children = client->zookeeper->getChildren(next_path);
|
|
for (auto & child : children)
|
|
child = next_path / child;
|
|
auto response = client->zookeeper->get(children);
|
|
|
|
for (size_t i = 0; i < response.size(); ++i)
|
|
{
|
|
totalNumChildren += response[i].stat.numChildren;
|
|
queue.push(children[i]);
|
|
}
|
|
}
|
|
|
|
std::cout << totalNumChildren << "\n";
|
|
}
|
|
|
|
}
|