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rocksdb/tools/ldb_cmd.h

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// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
// This source code is licensed under the BSD-style license found in the
// LICENSE file in the root directory of this source tree. An additional grant
// of patent rights can be found in the PATENTS file in the same directory.
//
#pragma once
#ifndef ROCKSDB_LITE
#include <string>
#include <iostream>
#include <sstream>
#include <stdlib.h>
#include <algorithm>
#include <stdio.h>
#include <vector>
#include <map>
#include "db/version_set.h"
#include "rocksdb/env.h"
#include "rocksdb/iterator.h"
#include "rocksdb/ldb_tool.h"
#include "rocksdb/options.h"
#include "rocksdb/slice.h"
#include "rocksdb/utilities/db_ttl.h"
#include "tools/ldb_cmd_execute_result.h"
#include "util/logging.h"
#include "util/string_util.h"
#include "utilities/ttl/db_ttl_impl.h"
using std::string;
using std::map;
using std::vector;
using std::ostringstream;
namespace rocksdb {
class LDBCommand {
public:
// Command-line arguments
static const string ARG_DB;
static const string ARG_PATH;
static const string ARG_HEX;
static const string ARG_KEY_HEX;
static const string ARG_VALUE_HEX;
static const string ARG_CF_NAME;
static const string ARG_TTL;
static const string ARG_TTL_START;
static const string ARG_TTL_END;
static const string ARG_TIMESTAMP;
static const string ARG_FROM;
static const string ARG_TO;
static const string ARG_MAX_KEYS;
static const string ARG_BLOOM_BITS;
static const string ARG_FIX_PREFIX_LEN;
static const string ARG_COMPRESSION_TYPE;
static const string ARG_BLOCK_SIZE;
static const string ARG_AUTO_COMPACTION;
static const string ARG_DB_WRITE_BUFFER_SIZE;
static const string ARG_WRITE_BUFFER_SIZE;
static const string ARG_FILE_SIZE;
static const string ARG_CREATE_IF_MISSING;
static const string ARG_NO_VALUE;
static LDBCommand* InitFromCmdLineArgs(
const vector<string>& args, const Options& options,
const LDBOptions& ldb_options,
const std::vector<ColumnFamilyDescriptor>* column_families);
static LDBCommand* InitFromCmdLineArgs(
int argc, char** argv, const Options& options,
const LDBOptions& ldb_options,
const std::vector<ColumnFamilyDescriptor>* column_families);
bool ValidateCmdLineOptions();
virtual Options PrepareOptionsForOpenDB();
virtual void SetDBOptions(Options options) {
options_ = options;
}
virtual void SetColumnFamilies(
const std::vector<ColumnFamilyDescriptor>* column_families) {
if (column_families != nullptr) {
column_families_ = *column_families;
} else {
column_families_.clear();
}
}
void SetLDBOptions(const LDBOptions& ldb_options) {
ldb_options_ = ldb_options;
}
virtual bool NoDBOpen() {
return false;
}
virtual ~LDBCommand() { CloseDB(); }
/* Run the command, and return the execute result. */
void Run() {
if (!exec_state_.IsNotStarted()) {
return;
}
if (db_ == nullptr && !NoDBOpen()) {
OpenDB();
}
// We'll intentionally proceed even if the DB can't be opened because users
// can also specify a filename, not just a directory.
DoCommand();
if (exec_state_.IsNotStarted()) {
exec_state_ = LDBCommandExecuteResult::Succeed("");
}
if (db_ != nullptr) {
CloseDB ();
}
}
virtual void DoCommand() = 0;
LDBCommandExecuteResult GetExecuteState() {
return exec_state_;
}
void ClearPreviousRunState() {
exec_state_.Reset();
}
static string HexToString(const string& str) {
std::string::size_type len = str.length();
string parsed;
static const char* const hexas = "0123456789ABCDEF";
parsed.reserve(len / 2);
if (len < 2 || str[0] != '0' || str[1] != 'x') {
fprintf(stderr, "Invalid hex input %s. Must start with 0x\n",
str.c_str());
throw "Invalid hex input";
}
for (unsigned int i = 2; i < len; i += 2) {
char a = static_cast<char>(toupper(str[i]));
const char* p = std::lower_bound(hexas, hexas + 16, a);
if (*p != a) {
throw "Invalid hex value";
}
if (i + 1 >= len) {
// if odd number of chars than we just hit end of string
parsed.push_back(static_cast<char>(p - hexas));
break;
}
char b = static_cast<char>(toupper(str[i + 1]));
const char* q = std::lower_bound(hexas, hexas + 16, b);
if (*q == b) {
// pairwise compute decimal value from hex
parsed.push_back(static_cast<char>(((p - hexas) << 4) | (q - hexas)));
} else {
throw "Invalid hex value";
}
}
return parsed;
}
static string StringToHex(const string& str) {
string result = "0x";
char buf[10];
for (size_t i = 0; i < str.length(); i++) {
snprintf(buf, 10, "%02X", (unsigned char)str[i]);
result += buf;
}
return result;
}
static const char* DELIM;
protected:
LDBCommandExecuteResult exec_state_;
string db_path_;
string column_family_name_;
DB* db_;
DBWithTTL* db_ttl_;
std::map<std::string, ColumnFamilyHandle*> cf_handles_;
/**
* true implies that this command can work if the db is opened in read-only
* mode.
*/
bool is_read_only_;
/** If true, the key is input/output as hex in get/put/scan/delete etc. */
bool is_key_hex_;
/** If true, the value is input/output as hex in get/put/scan/delete etc. */
bool is_value_hex_;
/** If true, the value is treated as timestamp suffixed */
bool is_db_ttl_;
// If true, the kvs are output with their insert/modify timestamp in a ttl db
bool timestamp_;
/**
* Map of options passed on the command-line.
*/
const map<string, string> option_map_;
/**
* Flags passed on the command-line.
*/
const vector<string> flags_;
/** List of command-line options valid for this command */
const vector<string> valid_cmd_line_options_;
bool ParseKeyValue(const string& line, string* key, string* value,
bool is_key_hex, bool is_value_hex);
LDBCommand(const map<string, string>& options, const vector<string>& flags,
bool is_read_only, const vector<string>& valid_cmd_line_options) :
db_(nullptr),
is_read_only_(is_read_only),
is_key_hex_(false),
is_value_hex_(false),
is_db_ttl_(false),
timestamp_(false),
option_map_(options),
flags_(flags),
valid_cmd_line_options_(valid_cmd_line_options) {
map<string, string>::const_iterator itr = options.find(ARG_DB);
if (itr != options.end()) {
db_path_ = itr->second;
}
itr = options.find(ARG_CF_NAME);
if (itr != options.end()) {
column_family_name_ = itr->second;
} else {
column_family_name_ = kDefaultColumnFamilyName;
}
is_key_hex_ = IsKeyHex(options, flags);
is_value_hex_ = IsValueHex(options, flags);
is_db_ttl_ = IsFlagPresent(flags, ARG_TTL);
timestamp_ = IsFlagPresent(flags, ARG_TIMESTAMP);
}
void OpenDB() {
Options opt = PrepareOptionsForOpenDB();
if (!exec_state_.IsNotStarted()) {
return;
}
// Open the DB.
Status st;
std::vector<ColumnFamilyHandle*> handles_opened;
if (is_db_ttl_) {
// ldb doesn't yet support TTL DB with multiple column families
if (!column_family_name_.empty() || !column_families_.empty()) {
exec_state_ = LDBCommandExecuteResult::Failed(
"ldb doesn't support TTL DB with multiple column families");
}
if (is_read_only_) {
st = DBWithTTL::Open(opt, db_path_, &db_ttl_, 0, true);
} else {
st = DBWithTTL::Open(opt, db_path_, &db_ttl_);
}
db_ = db_ttl_;
} else {
if (column_families_.empty()) {
// Try to figure out column family lists
std::vector<std::string> cf_list;
st = DB::ListColumnFamilies(DBOptions(), db_path_, &cf_list);
// There is possible the DB doesn't exist yet, for "create if not
// "existing case". The failure is ignored here. We rely on DB::Open()
// to give us the correct error message for problem with opening
// existing DB.
if (st.ok() && cf_list.size() > 1) {
// Ignore single column family DB.
for (auto cf_name : cf_list) {
column_families_.emplace_back(cf_name, opt);
}
}
}
if (is_read_only_) {
if (column_families_.empty()) {
st = DB::OpenForReadOnly(opt, db_path_, &db_);
} else {
st = DB::OpenForReadOnly(opt, db_path_, column_families_,
&handles_opened, &db_);
}
} else {
if (column_families_.empty()) {
st = DB::Open(opt, db_path_, &db_);
} else {
st = DB::Open(opt, db_path_, column_families_, &handles_opened, &db_);
}
}
}
if (!st.ok()) {
string msg = st.ToString();
exec_state_ = LDBCommandExecuteResult::Failed(msg);
} else if (!handles_opened.empty()) {
assert(handles_opened.size() == column_families_.size());
bool found_cf_name = false;
for (size_t i = 0; i < handles_opened.size(); i++) {
cf_handles_[column_families_[i].name] = handles_opened[i];
if (column_family_name_ == column_families_[i].name) {
found_cf_name = true;
}
}
if (!found_cf_name) {
exec_state_ = LDBCommandExecuteResult::Failed(
"Non-existing column family " + column_family_name_);
CloseDB();
}
} else {
// We successfully opened DB in single column family mode.
assert(column_families_.empty());
if (column_family_name_ != kDefaultColumnFamilyName) {
exec_state_ = LDBCommandExecuteResult::Failed(
"Non-existing column family " + column_family_name_);
CloseDB();
}
}
options_ = opt;
}
void CloseDB () {
if (db_ != nullptr) {
for (auto& pair : cf_handles_) {
delete pair.second;
}
delete db_;
db_ = nullptr;
}
}
ColumnFamilyHandle* GetCfHandle() {
if (!cf_handles_.empty()) {
auto it = cf_handles_.find(column_family_name_);
if (it == cf_handles_.end()) {
exec_state_ = LDBCommandExecuteResult::Failed(
"Cannot find column family " + column_family_name_);
} else {
return it->second;
}
}
return db_->DefaultColumnFamily();
}
static string PrintKeyValue(const string& key, const string& value,
bool is_key_hex, bool is_value_hex) {
string result;
result.append(is_key_hex ? StringToHex(key) : key);
result.append(DELIM);
result.append(is_value_hex ? StringToHex(value) : value);
return result;
}
static string PrintKeyValue(const string& key, const string& value,
bool is_hex) {
return PrintKeyValue(key, value, is_hex, is_hex);
}
/**
* Return true if the specified flag is present in the specified flags vector
*/
static bool IsFlagPresent(const vector<string>& flags, const string& flag) {
return (std::find(flags.begin(), flags.end(), flag) != flags.end());
}
static string HelpRangeCmdArgs() {
ostringstream str_stream;
str_stream << " ";
str_stream << "[--" << ARG_FROM << "] ";
str_stream << "[--" << ARG_TO << "] ";
return str_stream.str();
}
/**
* A helper function that returns a list of command line options
* used by this command. It includes the common options and the ones
* passed in.
*/
static vector<string> BuildCmdLineOptions(vector<string> options) {
vector<string> ret = {ARG_DB, ARG_BLOOM_BITS, ARG_BLOCK_SIZE,
ARG_AUTO_COMPACTION, ARG_COMPRESSION_TYPE,
ARG_WRITE_BUFFER_SIZE, ARG_FILE_SIZE,
ARG_FIX_PREFIX_LEN, ARG_CF_NAME};
ret.insert(ret.end(), options.begin(), options.end());
return ret;
}
bool ParseIntOption(const map<string, string>& options, const string& option,
int& value, LDBCommandExecuteResult& exec_state);
bool ParseStringOption(const map<string, string>& options,
const string& option, string* value);
Options options_;
std::vector<ColumnFamilyDescriptor> column_families_;
LDBOptions ldb_options_;
private:
/**
* Interpret command line options and flags to determine if the key
* should be input/output in hex.
*/
bool IsKeyHex(const map<string, string>& options,
const vector<string>& flags) {
return (IsFlagPresent(flags, ARG_HEX) ||
IsFlagPresent(flags, ARG_KEY_HEX) ||
ParseBooleanOption(options, ARG_HEX, false) ||
ParseBooleanOption(options, ARG_KEY_HEX, false));
}
/**
* Interpret command line options and flags to determine if the value
* should be input/output in hex.
*/
bool IsValueHex(const map<string, string>& options,
const vector<string>& flags) {
return (IsFlagPresent(flags, ARG_HEX) ||
IsFlagPresent(flags, ARG_VALUE_HEX) ||
ParseBooleanOption(options, ARG_HEX, false) ||
ParseBooleanOption(options, ARG_VALUE_HEX, false));
}
/**
* Returns the value of the specified option as a boolean.
* default_val is used if the option is not found in options.
* Throws an exception if the value of the option is not
* "true" or "false" (case insensitive).
*/
bool ParseBooleanOption(const map<string, string>& options,
const string& option, bool default_val) {
map<string, string>::const_iterator itr = options.find(option);
if (itr != options.end()) {
string option_val = itr->second;
return StringToBool(itr->second);
}
return default_val;
}
/**
* Converts val to a boolean.
* val must be either true or false (case insensitive).
* Otherwise an exception is thrown.
*/
bool StringToBool(string val) {
std::transform(val.begin(), val.end(), val.begin(),
[](char ch)->char { return (char)::tolower(ch); });
if (val == "true") {
return true;
} else if (val == "false") {
return false;
} else {
throw "Invalid value for boolean argument";
}
}
static LDBCommand* SelectCommand(
const string& cmd,
const vector<string>& cmdParams,
const map<string, string>& option_map,
const vector<string>& flags
);
};
class CompactorCommand: public LDBCommand {
public:
static string Name() { return "compact"; }
CompactorCommand(const vector<string>& params,
const map<string, string>& options, const vector<string>& flags);
static void Help(string& ret);
virtual void DoCommand() override;
private:
bool null_from_;
string from_;
bool null_to_;
string to_;
};
class DBFileDumperCommand : public LDBCommand {
public:
static string Name() { return "dump_live_files"; }
DBFileDumperCommand(const vector<string>& params,
const map<string, string>& options,
const vector<string>& flags);
static void Help(string& ret);
virtual void DoCommand() override;
};
class DBDumperCommand: public LDBCommand {
public:
static string Name() { return "dump"; }
DBDumperCommand(const vector<string>& params,
const map<string, string>& options, const vector<string>& flags);
static void Help(string& ret);
virtual void DoCommand() override;
private:
/**
* Extract file name from the full path. We handle both the forward slash (/)
* and backslash (\) to make sure that different OS-s are supported.
*/
static string GetFileNameFromPath(const string& s) {
std::size_t n = s.find_last_of("/\\");
if (std::string::npos == n) {
return s;
} else {
return s.substr(n + 1);
}
}
void DoDumpCommand();
bool null_from_;
string from_;
bool null_to_;
string to_;
int max_keys_;
string delim_;
bool count_only_;
bool count_delim_;
bool print_stats_;
string path_;
static const string ARG_COUNT_ONLY;
static const string ARG_COUNT_DELIM;
static const string ARG_STATS;
static const string ARG_TTL_BUCKET;
};
class InternalDumpCommand: public LDBCommand {
public:
static string Name() { return "idump"; }
InternalDumpCommand(const vector<string>& params,
const map<string, string>& options,
const vector<string>& flags);
static void Help(string& ret);
virtual void DoCommand() override;
private:
bool has_from_;
string from_;
bool has_to_;
string to_;
int max_keys_;
string delim_;
bool count_only_;
bool count_delim_;
bool print_stats_;
bool is_input_key_hex_;
static const string ARG_DELIM;
static const string ARG_COUNT_ONLY;
static const string ARG_COUNT_DELIM;
static const string ARG_STATS;
static const string ARG_INPUT_KEY_HEX;
};
class DBLoaderCommand: public LDBCommand {
public:
static string Name() { return "load"; }
DBLoaderCommand(string& db_name, vector<string>& args);
DBLoaderCommand(const vector<string>& params,
const map<string, string>& options, const vector<string>& flags);
static void Help(string& ret);
virtual void DoCommand() override;
virtual Options PrepareOptionsForOpenDB() override;
private:
bool create_if_missing_;
bool disable_wal_;
bool bulk_load_;
bool compact_;
static const string ARG_DISABLE_WAL;
static const string ARG_BULK_LOAD;
static const string ARG_COMPACT;
};
class ManifestDumpCommand: public LDBCommand {
public:
static string Name() { return "manifest_dump"; }
ManifestDumpCommand(const vector<string>& params,
const map<string, string>& options, const vector<string>& flags);
static void Help(string& ret);
virtual void DoCommand() override;
virtual bool NoDBOpen() override { return true; }
private:
bool verbose_;
bool json_;
string path_;
static const string ARG_VERBOSE;
static const string ARG_JSON;
static const string ARG_PATH;
};
class ListColumnFamiliesCommand : public LDBCommand {
public:
static string Name() { return "list_column_families"; }
ListColumnFamiliesCommand(const vector<string>& params,
const map<string, string>& options,
const vector<string>& flags);
static void Help(string& ret);
virtual void DoCommand() override;
virtual bool NoDBOpen() override { return true; }
private:
string dbname_;
};
class CreateColumnFamilyCommand : public LDBCommand {
public:
static string Name() { return "create_column_family"; }
CreateColumnFamilyCommand(const vector<string>& params,
const map<string, string>& options,
const vector<string>& flags);
static void Help(string& ret);
virtual void DoCommand() override;
virtual bool NoDBOpen() override { return false; }
private:
string new_cf_name_;
};
class ReduceDBLevelsCommand : public LDBCommand {
public:
static string Name() { return "reduce_levels"; }
ReduceDBLevelsCommand(const vector<string>& params,
const map<string, string>& options, const vector<string>& flags);
virtual Options PrepareOptionsForOpenDB() override;
virtual void DoCommand() override;
virtual bool NoDBOpen() override { return true; }
static void Help(string& msg);
static vector<string> PrepareArgs(const string& db_path, int new_levels,
bool print_old_level = false);
private:
int old_levels_;
int new_levels_;
bool print_old_levels_;
static const string ARG_NEW_LEVELS;
static const string ARG_PRINT_OLD_LEVELS;
Status GetOldNumOfLevels(Options& opt, int* levels);
};
class ChangeCompactionStyleCommand : public LDBCommand {
public:
static string Name() { return "change_compaction_style"; }
ChangeCompactionStyleCommand(const vector<string>& params,
const map<string, string>& options, const vector<string>& flags);
virtual Options PrepareOptionsForOpenDB() override;
virtual void DoCommand() override;
static void Help(string& msg);
private:
int old_compaction_style_;
int new_compaction_style_;
static const string ARG_OLD_COMPACTION_STYLE;
static const string ARG_NEW_COMPACTION_STYLE;
};
class WALDumperCommand : public LDBCommand {
public:
static string Name() { return "dump_wal"; }
WALDumperCommand(const vector<string>& params,
const map<string, string>& options, const vector<string>& flags);
virtual bool NoDBOpen() override { return true; }
static void Help(string& ret);
virtual void DoCommand() override;
private:
bool print_header_;
string wal_file_;
bool print_values_;
static const string ARG_WAL_FILE;
static const string ARG_PRINT_HEADER;
static const string ARG_PRINT_VALUE;
};
class GetCommand : public LDBCommand {
public:
static string Name() { return "get"; }
GetCommand(const vector<string>& params, const map<string, string>& options,
const vector<string>& flags);
virtual void DoCommand() override;
static void Help(string& ret);
private:
string key_;
};
class ApproxSizeCommand : public LDBCommand {
public:
static string Name() { return "approxsize"; }
ApproxSizeCommand(const vector<string>& params,
const map<string, string>& options, const vector<string>& flags);
virtual void DoCommand() override;
static void Help(string& ret);
private:
string start_key_;
string end_key_;
};
class BatchPutCommand : public LDBCommand {
public:
static string Name() { return "batchput"; }
BatchPutCommand(const vector<string>& params,
const map<string, string>& options, const vector<string>& flags);
virtual void DoCommand() override;
static void Help(string& ret);
virtual Options PrepareOptionsForOpenDB() override;
private:
/**
* The key-values to be inserted.
*/
vector<std::pair<string, string>> key_values_;
};
class ScanCommand : public LDBCommand {
public:
static string Name() { return "scan"; }
ScanCommand(const vector<string>& params, const map<string, string>& options,
const vector<string>& flags);
virtual void DoCommand() override;
static void Help(string& ret);
private:
string start_key_;
string end_key_;
bool start_key_specified_;
bool end_key_specified_;
int max_keys_scanned_;
bool no_value_;
};
class DeleteCommand : public LDBCommand {
public:
static string Name() { return "delete"; }
DeleteCommand(const vector<string>& params,
const map<string, string>& options, const vector<string>& flags);
virtual void DoCommand() override;
static void Help(string& ret);
private:
string key_;
};
class PutCommand : public LDBCommand {
public:
static string Name() { return "put"; }
PutCommand(const vector<string>& params, const map<string, string>& options,
const vector<string>& flags);
virtual void DoCommand() override;
static void Help(string& ret);
virtual Options PrepareOptionsForOpenDB() override;
private:
string key_;
string value_;
};
/**
* Command that starts up a REPL shell that allows
* get/put/delete.
*/
class DBQuerierCommand: public LDBCommand {
public:
static string Name() { return "query"; }
DBQuerierCommand(const vector<string>& params,
const map<string, string>& options, const vector<string>& flags);
static void Help(string& ret);
virtual void DoCommand() override;
private:
static const char* HELP_CMD;
static const char* GET_CMD;
static const char* PUT_CMD;
static const char* DELETE_CMD;
};
class CheckConsistencyCommand : public LDBCommand {
public:
static string Name() { return "checkconsistency"; }
CheckConsistencyCommand(const vector<string>& params,
const map<string, string>& options, const vector<string>& flags);
virtual void DoCommand() override;
virtual bool NoDBOpen() override { return true; }
static void Help(string& ret);
};
} // namespace rocksdb
#endif // ROCKSDB_LITE