@ -7,32 +7,47 @@
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file. See the AUTHORS file for names of contributors.
# include "rocksdb/slice.h"
# include <stdio.h>
# include <algorithm>
# include "rocksdb/convenience.h"
# include "rocksdb/slice_transform.h"
# include "rocksdb/slice.h"
# include "rocksdb/utilities/object_registry.h"
# include "rocksdb/utilities/options_type.h"
# include "util/string_util.h"
# include <stdio.h>
namespace ROCKSDB_NAMESPACE {
namespace {
static std : : unordered_map < std : : string , OptionTypeInfo >
slice_transform_length_info = {
# ifndef ROCKSDB_LITE
{ " length " ,
{ 0 , OptionType : : kSizeT , OptionVerificationType : : kNormal ,
OptionTypeFlags : : kDontSerialize | OptionTypeFlags : : kCompareNever } } ,
# endif // ROCKSDB_LITE
} ;
class FixedPrefixTransform : public SliceTransform {
private :
size_t prefix_len_ ;
std : : string name_ ;
public :
explicit FixedPrefixTransform ( size_t prefix_len )
: prefix_len_ ( prefix_len ) ,
// Note that if any part of the name format changes, it will require
// changes on options_helper in order to make RocksDBOptionsParser work
// for the new change.
// TODO(yhchiang): move serialization / deserializaion code inside
// the class implementation itself.
name_ ( " rocksdb.FixedPrefix. " + ToString ( prefix_len_ ) ) { }
explicit FixedPrefixTransform ( size_t prefix_len ) : prefix_len_ ( prefix_len ) {
RegisterOptions ( Name ( ) , & prefix_len_ , & slice_transform_length_info ) ;
}
const char * Name ( ) const override { return name_ . c_str ( ) ; }
static const char * kClassName ( ) { return " rocksdb.FixedPrefix " ; }
static const char * kNickName ( ) { return " fixed " ; }
const char * Name ( ) const override { return kClassName ( ) ; }
const char * NickName ( ) const override { return kNickName ( ) ; }
std : : string GetId ( ) const override {
return std : : string ( Name ( ) ) + " . " + ROCKSDB_NAMESPACE : : ToString ( prefix_len_ ) ;
}
Slice Transform ( const Slice & src ) const override {
assert ( InDomain ( src ) ) ;
@ -60,19 +75,19 @@ class FixedPrefixTransform : public SliceTransform {
class CappedPrefixTransform : public SliceTransform {
private :
size_t cap_len_ ;
std : : string name_ ;
public :
explicit CappedPrefixTransform ( size_t cap_len )
: cap_len_ ( cap_len ) ,
// Note that if any part of the name format changes, it will require
// changes on options_helper in order to make RocksDBOptionsParser work
// for the new change.
// TODO(yhchiang): move serialization / deserializaion code inside
// the class implementation itself.
name_ ( " rocksdb.CappedPrefix. " + ToString ( cap_len_ ) ) { }
explicit CappedPrefixTransform ( size_t cap_len ) : cap_len_ ( cap_len ) {
RegisterOptions ( Name ( ) , & cap_len_ , & slice_transform_length_info ) ;
}
const char * Name ( ) const override { return name_ . c_str ( ) ; }
static const char * kClassName ( ) { return " rocksdb.CappedPrefix " ; }
static const char * kNickName ( ) { return " capped " ; }
const char * Name ( ) const override { return kClassName ( ) ; }
const char * NickName ( ) const override { return kNickName ( ) ; }
std : : string GetId ( ) const override {
return std : : string ( Name ( ) ) + " . " + ROCKSDB_NAMESPACE : : ToString ( cap_len_ ) ;
}
Slice Transform ( const Slice & src ) const override {
assert ( InDomain ( src ) ) ;
@ -99,7 +114,8 @@ class NoopTransform : public SliceTransform {
public :
explicit NoopTransform ( ) { }
const char * Name ( ) const override { return " rocksdb.Noop " ; }
static const char * kClassName ( ) { return " rocksdb.Noop " ; }
const char * Name ( ) const override { return kClassName ( ) ; }
Slice Transform ( const Slice & src ) const override { return src ; }
@ -112,6 +128,151 @@ class NoopTransform : public SliceTransform {
}
} ;
} // end namespace
const SliceTransform * NewFixedPrefixTransform ( size_t prefix_len ) {
return new FixedPrefixTransform ( prefix_len ) ;
}
const SliceTransform * NewCappedPrefixTransform ( size_t cap_len ) {
return new CappedPrefixTransform ( cap_len ) ;
}
const SliceTransform * NewNoopTransform ( ) { return new NoopTransform ; }
# ifndef ROCKSDB_LITE
static int RegisterBuiltinSliceTransform ( ObjectLibrary & library ,
const std : : string & /*arg*/ ) {
library . Register < const SliceTransform > (
NoopTransform : : kClassName ( ) ,
[ ] ( const std : : string & /*uri*/ ,
std : : unique_ptr < const SliceTransform > * guard ,
std : : string * /*errmsg*/ ) {
guard - > reset ( NewNoopTransform ( ) ) ;
return guard - > get ( ) ;
} ) ;
library . Register < const SliceTransform > (
std : : string ( FixedPrefixTransform : : kNickName ( ) ) + " :[0-9]+ " ,
[ ] ( const std : : string & uri , std : : unique_ptr < const SliceTransform > * guard ,
std : : string * /*errmsg*/ ) {
auto colon = uri . find ( " : " ) ;
auto len = ParseSizeT ( uri . substr ( colon + 1 ) ) ;
guard - > reset ( NewFixedPrefixTransform ( len ) ) ;
return guard - > get ( ) ;
} ) ;
library . Register < const SliceTransform > (
FixedPrefixTransform : : kClassName ( ) ,
[ ] ( const std : : string & /*uri*/ ,
std : : unique_ptr < const SliceTransform > * guard ,
std : : string * /*errmsg*/ ) {
guard - > reset ( NewFixedPrefixTransform ( 0 ) ) ;
return guard - > get ( ) ;
} ) ;
library . Register < const SliceTransform > (
std : : string ( FixedPrefixTransform : : kClassName ( ) ) + " \\ .[0-9]+ " ,
[ ] ( const std : : string & uri , std : : unique_ptr < const SliceTransform > * guard ,
std : : string * /*errmsg*/ ) {
auto len = ParseSizeT (
uri . substr ( strlen ( FixedPrefixTransform : : kClassName ( ) ) + 1 ) ) ;
guard - > reset ( NewFixedPrefixTransform ( len ) ) ;
return guard - > get ( ) ;
} ) ;
library . Register < const SliceTransform > (
std : : string ( CappedPrefixTransform : : kNickName ( ) ) + " :[0-9]+ " ,
[ ] ( const std : : string & uri , std : : unique_ptr < const SliceTransform > * guard ,
std : : string * /*errmsg*/ ) {
auto colon = uri . find ( " : " ) ;
auto len = ParseSizeT ( uri . substr ( colon + 1 ) ) ;
guard - > reset ( NewCappedPrefixTransform ( len ) ) ;
return guard - > get ( ) ;
} ) ;
library . Register < const SliceTransform > (
std : : string ( CappedPrefixTransform : : kClassName ( ) ) + " ( \\ .[0-9]+)? " ,
[ ] ( const std : : string & uri , std : : unique_ptr < const SliceTransform > * guard ,
std : : string * /*errmsg*/ ) {
if ( uri = = CappedPrefixTransform : : kClassName ( ) ) {
guard - > reset ( NewCappedPrefixTransform ( 0 ) ) ;
} else { // Length + "."
auto len = ParseSizeT (
uri . substr ( strlen ( CappedPrefixTransform : : kClassName ( ) ) + 1 ) ) ;
guard - > reset ( NewCappedPrefixTransform ( len ) ) ;
}
return guard - > get ( ) ;
} ) ;
return 5 ;
}
# endif // ROCKSDB_LITE
Status SliceTransform : : CreateFromString (
const ConfigOptions & config_options , const std : : string & value ,
std : : shared_ptr < const SliceTransform > * result ) {
# ifndef ROCKSDB_LITE
static std : : once_flag once ;
std : : call_once ( once , [ & ] ( ) {
RegisterBuiltinSliceTransform ( * ( ObjectLibrary : : Default ( ) . get ( ) ) , " " ) ;
} ) ;
# endif // ROCKSDB_LITE
std : : string id ;
std : : unordered_map < std : : string , std : : string > opt_map ;
Status status = Customizable : : GetOptionsMap ( config_options , result - > get ( ) ,
value , & id , & opt_map ) ;
if ( ! status . ok ( ) ) { // GetOptionsMap failed
return status ;
}
# ifndef ROCKSDB_LITE
status = config_options . registry - > NewSharedObject ( id , result ) ;
# else
auto Matches = [ ] ( const std : : string & input , size_t size , const char * pattern ,
char sep ) {
auto plen = strlen ( pattern ) ;
return ( size > plen + 2 & & input [ plen ] = = sep & &
StartsWith ( input , pattern ) ) ;
} ;
auto size = id . size ( ) ;
if ( id = = NoopTransform : : kClassName ( ) ) {
result - > reset ( NewNoopTransform ( ) ) ;
} else if ( Matches ( id , size , FixedPrefixTransform : : kNickName ( ) , ' : ' ) ) {
auto fixed = strlen ( FixedPrefixTransform : : kNickName ( ) ) ;
auto len = ParseSizeT ( id . substr ( fixed + 1 ) ) ;
result - > reset ( NewFixedPrefixTransform ( len ) ) ;
} else if ( Matches ( id , size , CappedPrefixTransform : : kNickName ( ) , ' : ' ) ) {
auto capped = strlen ( CappedPrefixTransform : : kNickName ( ) ) ;
auto len = ParseSizeT ( id . substr ( capped + 1 ) ) ;
result - > reset ( NewCappedPrefixTransform ( len ) ) ;
} else if ( Matches ( id , size , CappedPrefixTransform : : kClassName ( ) , ' . ' ) ) {
auto capped = strlen ( CappedPrefixTransform : : kClassName ( ) ) ;
auto len = ParseSizeT ( id . substr ( capped + 1 ) ) ;
result - > reset ( NewCappedPrefixTransform ( len ) ) ;
} else if ( Matches ( id , size , FixedPrefixTransform : : kClassName ( ) , ' . ' ) ) {
auto fixed = strlen ( FixedPrefixTransform : : kClassName ( ) ) ;
auto len = ParseSizeT ( id . substr ( fixed + 1 ) ) ;
result - > reset ( NewFixedPrefixTransform ( len ) ) ;
} else {
status = Status : : NotSupported ( " Cannot load object in LITE mode " , id ) ;
}
# endif // ROCKSDB_LITE
if ( ! status . ok ( ) ) {
if ( config_options . ignore_unsupported_options & & status . IsNotSupported ( ) ) {
return Status : : OK ( ) ;
} else {
return status ;
}
} else if ( result - > get ( ) ! = nullptr ) {
SliceTransform * transform = const_cast < SliceTransform * > ( result - > get ( ) ) ;
status = transform - > ConfigureFromMap ( config_options , opt_map ) ;
}
return status ;
} // namespace ROCKSDB_NAMESPACE
std : : string SliceTransform : : AsString ( ) const {
# ifndef ROCKSDB_LITE
ConfigOptions config_options ;
config_options . delimiter = " ; " ;
return ToString ( config_options ) ;
# else
return GetId ( ) ;
# endif // ROCKSDB_LITE
}
// 2 small internal utility functions, for efficient hex conversions
@ -197,18 +358,6 @@ bool Slice::DecodeHex(std::string* result) const {
return true ;
}
const SliceTransform * NewFixedPrefixTransform ( size_t prefix_len ) {
return new FixedPrefixTransform ( prefix_len ) ;
}
const SliceTransform * NewCappedPrefixTransform ( size_t cap_len ) {
return new CappedPrefixTransform ( cap_len ) ;
}
const SliceTransform * NewNoopTransform ( ) {
return new NoopTransform ;
}
PinnableSlice : : PinnableSlice ( PinnableSlice & & other ) {
* this = std : : move ( other ) ;
}
mrambacher
3 years ago
committed by