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foundationdb/fdbclient/FDBTypes.h

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/*
* FDBTypes.h
*
* This source file is part of the FoundationDB open source project
*
* Copyright 2013-2018 Apple Inc. and the FoundationDB project authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef FDBCLIENT_FDBTYPES_H
#define FDBCLIENT_FDBTYPES_H
#include "flow/flow.h"
#include "Knobs.h"
using std::vector;
using std::pair;
typedef int64_t Version;
typedef uint64_t LogEpoch;
typedef uint64_t Sequence;
typedef StringRef KeyRef;
typedef StringRef ValueRef;
typedef int64_t Generation;
enum { tagLocalitySpecial = -1, tagLocalityLogRouter = -2, tagLocalityRemoteLog = -3, tagLocalityUpgraded = -4, tagLocalitySatellite = -5, tagLocalityInvalid = -99 }; //The TLog and LogRouter require these number to be as compact as possible
#pragma pack(push, 1)
struct Tag {
int8_t locality;
uint16_t id;
Tag() : locality(tagLocalitySpecial), id(0) {}
Tag(int8_t locality, uint16_t id) : locality(locality), id(id) {}
bool operator == ( const Tag& r ) const { return locality==r.locality && id==r.id; }
bool operator != ( const Tag& r ) const { return locality!=r.locality || id!=r.id; }
bool operator < ( const Tag& r ) const { return locality < r.locality || (locality == r.locality && id < r.id); }
std::string toString() const {
return format("%d:%d", locality, id);
}
template <class Ar>
force_inline void serialize_unversioned(Ar& ar) {
ar & locality & id;
}
};
#pragma pack(pop)
template <class Ar> void load( Ar& ar, Tag& tag ) { tag.serialize_unversioned(ar); }
template <class Ar> void save( Ar& ar, Tag const& tag ) { const_cast<Tag&>(tag).serialize_unversioned(ar); }
static const Tag invalidTag {tagLocalitySpecial, 0};
static const Tag txsTag {tagLocalitySpecial, 1};
enum { txsTagOld = -1, invalidTagOld = -100 };
struct TagsAndMessage {
StringRef message;
std::vector<Tag> tags;
TagsAndMessage() {}
TagsAndMessage(StringRef message, const std::vector<Tag>& tags) : message(message), tags(tags) {}
};
struct KeyRangeRef;
struct KeyValueRef;
template <class Collection>
void uniquify( Collection& c ) {
std::sort(c.begin(), c.end());
c.resize( std::unique(c.begin(), c.end()) - c.begin() );
}
static std::string describe( const Tag item ) {
return format("%d:%d", item.locality, item.id);
}
static std::string describe( const int item ) {
return format("%d", item);
}
template <class T>
static std::string describe( Reference<T> const& item ) {
return item->toString();
}
template <class T>
static std::string describe( T const& item ) {
return item.toString();
}
template <class K, class V>
static std::string describe( std::map<K, V> const& items, int max_items = -1 ) {
if(!items.size())
return "[no items]";
std::string s;
int count = 0;
for(auto it = items.begin(); it != items.end(); it++) {
if( ++count > max_items && max_items >= 0)
break;
if (count > 1) s += ",";
s += describe(it->first) + "=>" + describe(it->second);
}
return s;
}
template <class T>
static std::string describeList( T const& items, int max_items ) {
if(!items.size())
return "[no items]";
std::string s;
int count = 0;
for(auto const& item : items) {
if( ++count > max_items && max_items >= 0)
break;
if (count > 1) s += ",";
s += describe(item);
}
return s;
}
template <class T>
static std::string describe( std::vector<T> const& items, int max_items = -1 ) {
return describeList(items, max_items);
}
template <class T>
static std::string describe( std::set<T> const& items, int max_items = -1 ) {
return describeList(items, max_items);
}
std::string printable( const StringRef& val );
std::string printable( const std::string& val );
std::string printable( const Optional<StringRef>& val );
std::string printable( const Optional<Standalone<StringRef>>& val );
std::string printable( const KeyRangeRef& range );
std::string printable( const VectorRef<StringRef>& val );
std::string printable( const VectorRef<KeyValueRef>& val );
std::string printable( const KeyValueRef& val );
inline bool equalsKeyAfter( const KeyRef& key, const KeyRef& compareKey ) {
if( key.size()+1 != compareKey.size() || compareKey[compareKey.size()-1] != 0 )
return false;
return compareKey.startsWith( key );
}
struct KeyRangeRef {
const KeyRef begin, end;
KeyRangeRef() {}
KeyRangeRef( const KeyRef& begin, const KeyRef& end ) : begin(begin), end(end) {
if( begin > end ) {
throw inverted_range();
}
}
KeyRangeRef( Arena& a, const KeyRangeRef& copyFrom ) : begin(a, copyFrom.begin), end(a, copyFrom.end) {}
bool operator == ( const KeyRangeRef& r ) const { return begin == r.begin && end == r.end; }
bool operator != ( const KeyRangeRef& r ) const { return begin != r.begin || end != r.end; }
bool contains( const KeyRef& key ) const { return begin <= key && key < end; }
bool contains( const KeyRangeRef& keys ) const { return begin <= keys.begin && keys.end <= end; }
bool intersects( const KeyRangeRef& keys ) const { return begin < keys.end && keys.begin < end; }
bool empty() const { return begin == end; }
bool singleKeyRange() const { return equalsKeyAfter(begin, end); }
Standalone<KeyRangeRef> withPrefix( const StringRef& prefix ) const {
return KeyRangeRef( begin.withPrefix(prefix), end.withPrefix(prefix) );
}
KeyRangeRef removePrefix( const StringRef& prefix ) const {
return KeyRangeRef( begin.removePrefix(prefix), end.removePrefix(prefix) );
}
const KeyRangeRef& operator = (const KeyRangeRef& rhs) {
const_cast<KeyRef&>(begin) = rhs.begin;
const_cast<KeyRef&>(end) = rhs.end;
return *this;
}
int expectedSize() const { return begin.expectedSize() + end.expectedSize(); }
template <class Ar>
force_inline void serialize(Ar& ar) {
ar & const_cast<KeyRef&>(begin) & const_cast<KeyRef&>(end);
if( begin > end ) {
throw inverted_range();
};
}
struct ArbitraryOrder {
bool operator()(KeyRangeRef const& a, KeyRangeRef const& b) const {
if (a.begin < b.begin) return true;
if (a.begin > b.begin) return false;
return a.end < b.end;
}
};
};
inline KeyRangeRef operator & (const KeyRangeRef& lhs, const KeyRangeRef& rhs) {
KeyRef b = std::max(lhs.begin, rhs.begin), e = std::min(lhs.end, rhs.end);
if (e < b)
return KeyRangeRef();
return KeyRangeRef(b,e);
}
struct KeyValueRef {
KeyRef key;
ValueRef value;
KeyValueRef() {}
KeyValueRef( const KeyRef& key, const ValueRef& value ) : key(key), value(value) {}
KeyValueRef( Arena& a, const KeyValueRef& copyFrom ) : key(a, copyFrom.key), value(a, copyFrom.value) {}
bool operator == ( const KeyValueRef& r ) const { return key == r.key && value == r.value; }
bool operator != ( const KeyValueRef& r ) const { return key != r.key || value != r.value; }
int expectedSize() const { return key.expectedSize() + value.expectedSize(); }
template <class Ar>
force_inline void serialize(Ar& ar) { ar & key & value; }
struct OrderByKey {
bool operator()(KeyValueRef const& a, KeyValueRef const& b) const {
return a.key < b.key;
}
template <class T>
bool operator()(T const& a, KeyValueRef const& b) const {
return a < b.key;
}
template <class T>
bool operator()(KeyValueRef const& a, T const& b) const {
return a.key < b;
}
};
struct OrderByKeyBack {
bool operator()(KeyValueRef const& a, KeyValueRef const& b) const {
return a.key > b.key;
}
template <class T>
bool operator()(T const& a, KeyValueRef const& b) const {
return a > b.key;
}
template <class T>
bool operator()(KeyValueRef const& a, T const& b) const {
return a.key > b;
}
};
};
typedef Standalone<KeyRef> Key;
typedef Standalone<ValueRef> Value;
typedef Standalone<KeyRangeRef> KeyRange;
typedef Standalone<KeyValueRef> KeyValue;
typedef Standalone<struct KeySelectorRef> KeySelector;
enum { invalidVersion = -1, latestVersion = -2 };
inline Key keyAfter( const KeyRef& key ) {
if(key == LiteralStringRef("\xff\xff"))
return key;
Standalone<StringRef> r;
uint8_t* s = new (r.arena()) uint8_t[ key.size() + 1 ];
memcpy(s, key.begin(), key.size() );
s[key.size()] = 0;
((StringRef&) r) = StringRef( s, key.size() + 1 );
return r;
}
inline KeyRef keyAfter( const KeyRef& key, Arena& arena ) {
if(key == LiteralStringRef("\xff\xff"))
return key;
uint8_t* t = new ( arena ) uint8_t[ key.size()+1 ];
memcpy(t, key.begin(), key.size() );
t[key.size()] = 0;
return KeyRef(t,key.size()+1);
}
inline KeyRange singleKeyRange( const KeyRef& a ) {
return KeyRangeRef(a, keyAfter(a));
}
inline KeyRangeRef singleKeyRange( KeyRef const& key, Arena& arena ) {
uint8_t* t = new ( arena ) uint8_t[ key.size()+1 ];
memcpy(t, key.begin(), key.size() );
t[key.size()] = 0;
return KeyRangeRef( KeyRef(t,key.size()), KeyRef(t, key.size()+1) );
}
inline KeyRange prefixRange( KeyRef prefix ) {
Standalone<KeyRangeRef> range;
KeyRef start = KeyRef(range.arena(), prefix);
KeyRef end = strinc(prefix, range.arena());
range.contents() = KeyRangeRef(start, end);
return range;
}
inline KeyRef keyBetween( const KeyRangeRef& keys ) {
// Returns (one of) the shortest key(s) either contained in keys or equal to keys.end,
// assuming its length is no more than CLIENT_KNOBS->SPLIT_KEY_SIZE_LIMIT. If the length of
// the shortest key exceeds that limit, then the end key is returned.
// The returned reference is valid as long as keys is valid.
int pos = 0; // will be the position of the first difference between keys.begin and keys.end
int minSize = std::min( keys.begin.size(), keys.end.size() );
for(; pos < minSize && pos < CLIENT_KNOBS->SPLIT_KEY_SIZE_LIMIT; pos++ ) {
if( keys.begin[pos] != keys.end[pos] ) {
return keys.end.substr(0,pos+1);
}
}
// If one more character keeps us in the limit, and the latter key is simply
// longer, then we only need one more byte of the end string.
if (pos < CLIENT_KNOBS->SPLIT_KEY_SIZE_LIMIT && keys.begin.size() < keys.end.size()) {
return keys.end.substr(0,pos+1);
}
return keys.end;
}
struct KeySelectorRef {
private:
KeyRef key; // Find the last item less than key
public:
bool orEqual; // (or equal to key, if this is true)
int offset; // and then move forward this many items (or backward if negative)
KeySelectorRef() {}
KeySelectorRef( const KeyRef& key, bool orEqual, int offset ) : orEqual(orEqual), offset(offset) {
setKey(key);
}
KeySelectorRef( Arena& arena, const KeySelectorRef& copyFrom ) : key(arena, copyFrom.key), orEqual(copyFrom.orEqual), offset(copyFrom.offset) {}
int expectedSize() const { return key.expectedSize(); }
void removeOrEqual(Arena &arena) {
if(orEqual) {
setKey(keyAfter(key, arena));
orEqual = false;
}
}
KeyRef getKey() const {
return key;
}
void setKey(KeyRef const& key) {
//There are no keys in the database with size greater than KEY_SIZE_LIMIT, so if this key selector has a key which is large,
//then we can translate it to an equivalent key selector with a smaller key
if(key.size() > (key.startsWith(LiteralStringRef("\xff")) ? CLIENT_KNOBS->SYSTEM_KEY_SIZE_LIMIT : CLIENT_KNOBS->KEY_SIZE_LIMIT))
this->key = key.substr(0, (key.startsWith(LiteralStringRef("\xff")) ? CLIENT_KNOBS->SYSTEM_KEY_SIZE_LIMIT : CLIENT_KNOBS->KEY_SIZE_LIMIT)+1);
else
this->key = key;
}
std::string toString() const {
if (offset > 0) {
if (orEqual) return format("%d+firstGreaterThan(%s)", offset-1, printable(key).c_str());
else return format("%d+firstGreaterOrEqual(%s)", offset-1, printable(key).c_str());
} else {
if (orEqual) return format("%d+lastLessOrEqual(%s)", offset, printable(key).c_str());
else return format("%d+lastLessThan(%s)", offset, printable(key).c_str());
}
}
bool isBackward() const { return !orEqual && offset<=0; } // True if the resolution of the KeySelector depends only on keys less than key
bool isFirstGreaterOrEqual() const { return !orEqual && offset==1; }
bool isFirstGreaterThan() const { return orEqual && offset==1; }
bool isLastLessOrEqual() const { return orEqual && offset==0; }
// True iff, regardless of the contents of the database, lhs must resolve to a key > rhs
bool isDefinitelyGreater( KeyRef const& k ) {
return offset >= 1 && ( isFirstGreaterOrEqual() ? key > k : key >= k );
}
// True iff, regardless of the contents of the database, lhs must resolve to a key < rhs
bool isDefinitelyLess( KeyRef const& k ) {
return offset <= 0 && ( isLastLessOrEqual() ? key < k : key <= k );
}
template <class Ar>
void serialize( Ar& ar ) {
ar & key & orEqual & offset;
}
};
inline bool operator == (const KeySelectorRef& lhs, const KeySelectorRef& rhs) { return lhs.getKey() == rhs.getKey() && lhs.orEqual==rhs.orEqual && lhs.offset==rhs.offset; }
inline KeySelectorRef lastLessThan( const KeyRef& k ) {
return KeySelectorRef( k, false, 0 );
}
inline KeySelectorRef lastLessOrEqual( const KeyRef& k ) {
return KeySelectorRef( k, true, 0 );
}
inline KeySelectorRef firstGreaterThan( const KeyRef& k ) {
return KeySelectorRef( k, true, +1 );
}
inline KeySelectorRef firstGreaterOrEqual( const KeyRef& k ) {
return KeySelectorRef( k, false, +1 );
}
inline KeySelectorRef operator + (const KeySelectorRef& s, int off) {
return KeySelectorRef(s.getKey(), s.orEqual, s.offset+off);
}
inline KeySelectorRef operator - (const KeySelectorRef& s, int off) {
return KeySelectorRef(s.getKey(), s.orEqual, s.offset-off);
}
template <class Val>
struct KeyRangeWith : KeyRange {
Val value;
KeyRangeWith() {}
KeyRangeWith( const KeyRangeRef& range, const Val& value ) : KeyRange(range), value(value) {}
bool operator == ( const KeyRangeWith& r ) const { return KeyRangeRef::operator==(r) && value == r.value; }
template <class Ar>
void serialize( Ar& ar ) {
ar & ((KeyRange&)*this) & value;
}
};
template <class Val>
static inline KeyRangeWith<Val> keyRangeWith( const KeyRangeRef& range, const Val& value ) {
return KeyRangeWith<Val>(range, value);
}
struct GetRangeLimits {
enum { ROW_LIMIT_UNLIMITED = -1, BYTE_LIMIT_UNLIMITED = -1 };
int rows;
int minRows;
int bytes;
GetRangeLimits() : rows( ROW_LIMIT_UNLIMITED ), minRows(1), bytes( BYTE_LIMIT_UNLIMITED ) {}
explicit GetRangeLimits( int rowLimit ) : rows( rowLimit ), minRows(1), bytes( BYTE_LIMIT_UNLIMITED ) {}
GetRangeLimits( int rowLimit, int byteLimit ) : rows( rowLimit ), minRows(1), bytes( byteLimit ) {}
void decrement( VectorRef<KeyValueRef> const& data );
void decrement( KeyValueRef const& data );
// True if either the row or byte limit has been reached
bool isReached();
// True if data would cause the row or byte limit to be reached
bool reachedBy( VectorRef<KeyValueRef> const& data );
bool hasByteLimit();
bool hasRowLimit();
bool hasSatisfiedMinRows();
bool isValid() { return (rows >= 0 || rows == ROW_LIMIT_UNLIMITED)
&& (bytes >= 0 || bytes == BYTE_LIMIT_UNLIMITED)
&& minRows >= 0 && (minRows <= rows || rows == ROW_LIMIT_UNLIMITED); }
};
struct RangeResultRef : VectorRef<KeyValueRef> {
bool more; // True if (but not necessarily only if) values remain in the *key* range requested (possibly beyond the limits requested)
// False implies that no such values remain
Optional<KeyRef> readThrough; // Only present when 'more' is true. When present, this value represent the end (or beginning if reverse) of the range
// which was read to produce these results. This is guarenteed to be less than the requested range.
bool readToBegin;
bool readThroughEnd;
RangeResultRef() : more(false), readToBegin(false), readThroughEnd(false) {}
RangeResultRef( Arena& p, const RangeResultRef& toCopy ) : more( toCopy.more ), readToBegin( toCopy.readToBegin ), readThroughEnd( toCopy.readThroughEnd ), readThrough( toCopy.readThrough.present() ? KeyRef( p, toCopy.readThrough.get() ) : Optional<KeyRef>() ), VectorRef<KeyValueRef>( p, toCopy ) {}
RangeResultRef( const VectorRef<KeyValueRef>& value, bool more, Optional<KeyRef> readThrough = Optional<KeyRef>() ) : VectorRef<KeyValueRef>( value ), more( more ), readThrough( readThrough ), readToBegin( false ), readThroughEnd( false ) {}
RangeResultRef( bool readToBegin, bool readThroughEnd ) : more(false), readToBegin(readToBegin), readThroughEnd(readThroughEnd) { }
template <class Ar>
void serialize( Ar& ar ) {
ar & ((VectorRef<KeyValueRef>&)*this) & more & readThrough & readToBegin & readThroughEnd;
}
};
struct KeyValueStoreType {
// These enumerated values are stored in the database configuration, so can NEVER be changed. Only add new ones just before END.
enum StoreType {
SSD_BTREE_V1,
MEMORY,
SSD_BTREE_V2,
END
};
KeyValueStoreType() : type(END) {}
KeyValueStoreType( StoreType type ) : type(type) {
if ((uint32_t)type > END)
this->type = END;
}
operator StoreType() const { return StoreType(type); }
template <class Ar>
void serialize(Ar& ar) { ar & type; }
std::string toString() const {
switch( type ) {
case SSD_BTREE_V1: return "ssd-1";
case SSD_BTREE_V2: return "ssd-2";
case MEMORY: return "memory";
default: return "unknown";
}
}
private:
uint32_t type;
};
//Contains the amount of free and total space for a storage server, in bytes
struct StorageBytes {
int64_t free;
int64_t total;
int64_t used; // Used by *this* store, not total-free
int64_t available; // Amount of disk space that can be used by data structure, including free disk space and internally reusable space
StorageBytes() { }
StorageBytes(int64_t free, int64_t total, int64_t used, int64_t available) : free(free), total(total), used(used), available(available) { }
template <class Ar>
void serialize(Ar& ar) {
ar & free & total & used & available;
}
};
struct LogMessageVersion {
// Each message pushed into the log system has a unique, totally ordered LogMessageVersion
// See ILogSystem::push() for how these are assigned
Version version;
uint32_t sub;
void reset(Version v) {
version = v;
sub = 0;
}
bool operator<(LogMessageVersion const& r) const {
if (version<r.version) return true;
if (r.version<version) return false;
return sub < r.sub;
}
bool operator==(LogMessageVersion const& r) const { return version == r.version && sub == r.sub; }
std::string toString() const { return format("%lld.%d", version, sub); }
LogMessageVersion(Version version, uint32_t sub) : version(version), sub(sub) {}
explicit LogMessageVersion(Version version) : version(version), sub(0) {}
LogMessageVersion() : version(0), sub(0) {}
bool empty() const { return (version == 0) && (sub == 0); }
};
struct AddressExclusion {
uint32_t ip;
int port;
AddressExclusion() : ip(0), port(0) {}
explicit AddressExclusion( uint32_t ip ) : ip(ip), port(0) {}
explicit AddressExclusion( uint32_t ip, int port ) : ip(ip), port(port) {}
explicit AddressExclusion (std::string s) {
int a,b,c,d,p,count=-1;
if (sscanf(s.c_str(), "%d.%d.%d.%d:%d%n", &a,&b,&c,&d, &p, &count) == 5 && count == s.size()) {
ip = (a<<24)+(b<<16)+(c<<8)+d;
port = p;
}
else if (sscanf(s.c_str(), "%d.%d.%d.%d%n", &a,&b,&c,&d, &count) == 4 && count == s.size()) {
ip = (a<<24)+(b<<16)+(c<<8)+d;
port = 0;
}
else {
throw connection_string_invalid();
}
}
bool operator< (AddressExclusion const& r) const { if (ip != r.ip) return ip < r.ip; return port<r.port; }
bool operator== (AddressExclusion const& r) const { return ip == r.ip && port == r.port; }
bool isWholeMachine() const { return port == 0; }
bool isValid() const { return ip != 0 || port != 0; }
bool excludes( NetworkAddress const& addr ) const {
if(isWholeMachine())
return ip == addr.ip;
return ip == addr.ip && port == addr.port;
}
// This is for debugging and IS NOT to be used for serialization to persistant state
std::string toString() const {
std::string as = format( "%d.%d.%d.%d", (ip>>24)&0xff, (ip>>16)&0xff, (ip>>8)&0xff, ip&0xff );
if (!isWholeMachine())
as += format(":%d", port);
return as;
}
static AddressExclusion parse( StringRef const& );
template <class Ar>
void serialize(Ar& ar) {
ar.serializeBinaryItem(*this);
}
};
static bool addressExcluded( std::set<AddressExclusion> const& exclusions, NetworkAddress const& addr ) {
return exclusions.count( AddressExclusion(addr.ip, addr.port) ) || exclusions.count( AddressExclusion(addr.ip) );
}
struct ClusterControllerPriorityInfo {
enum DCFitness { FitnessPrimary, FitnessRemote, FitnessPreferred, FitnessUnknown, FitnessBad }; //cannot be larger than 7 because of leader election mask
static DCFitness calculateDCFitness(Optional<Key> const& dcId, vector<Optional<Key>> const& dcPriority) {
if(!dcPriority.size()) {
return FitnessUnknown;
} else if(dcPriority.size() == 1) {
if(dcId == dcPriority[0]) {
return FitnessPreferred;
} else {
return FitnessUnknown;
}
} else {
if(dcId == dcPriority[0]) {
return FitnessPrimary;
} else if(dcId == dcPriority[1]) {
return FitnessRemote;
} else {
return FitnessBad;
}
}
}
uint8_t processClassFitness;
bool isExcluded;
uint8_t dcFitness;
bool operator== (ClusterControllerPriorityInfo const& r) const { return processClassFitness == r.processClassFitness && isExcluded == r.isExcluded && dcFitness == r.dcFitness; }
ClusterControllerPriorityInfo(uint8_t processClassFitness, bool isExcluded, uint8_t dcFitness) : processClassFitness(processClassFitness), isExcluded(isExcluded), dcFitness(dcFitness) {}
template <class Ar>
void serialize(Ar& ar) {
ar & processClassFitness & isExcluded & dcFitness;
}
};
#endif
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