387 lines
14 KiB
C++
387 lines
14 KiB
C++
/*
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* KeyRangeMap.h
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*
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* This source file is part of the FoundationDB open source project
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*
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* Copyright 2013-2018 Apple Inc. and the FoundationDB project authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef FLOW_KEYRANGEMAP_H
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#define FLOW_KEYRANGEMAP_H
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#pragma once
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#include "flow/flow.h"
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#include "fdbclient/FDBTypes.h"
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#include "boost/range.hpp"
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#include "flow/IndexedSet.h"
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#include "fdbclient/SystemData.h"
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#include "fdbrpc/RangeMap.h"
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#include "fdbclient/Knobs.h"
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using boost::iterator_range;
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template <class Val, class Metric = int, class MetricFunc = ConstantMetric<Metric>>
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class KeyRangeMap : public RangeMap<Key, Val, KeyRangeRef, Metric, MetricFunc>,
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NonCopyable,
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public ReferenceCounted<KeyRangeMap<Val>> {
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public:
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explicit KeyRangeMap(Val v = Val(), Key endKey = allKeys.end)
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: RangeMap<Key, Val, KeyRangeRef, Metric, MetricFunc>(endKey, v), mapEnd(endKey) {}
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void operator=(KeyRangeMap&& r) noexcept {
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mapEnd = std::move(r.mapEnd);
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RangeMap<Key, Val, KeyRangeRef, Metric, MetricFunc>::operator=(std::move(r));
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}
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void insert(const KeyRangeRef& keys, const Val& value) {
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RangeMap<Key, Val, KeyRangeRef, Metric, MetricFunc>::insert(keys, value);
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}
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void insert(const KeyRef& key, const Val& value) {
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RangeMap<Key, Val, KeyRangeRef, Metric, MetricFunc>::insert(singleKeyRange(key), value);
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}
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std::vector<KeyRangeWith<Val>> getAffectedRangesAfterInsertion(const KeyRangeRef& keys,
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const Val& insertionValue = Val());
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typename RangeMap<Key, Val, KeyRangeRef, Metric, MetricFunc>::Ranges modify(
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const KeyRangeRef&
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keys) // Returns ranges, the first of which begins at keys.begin and the last of which ends at keys.end
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{
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MapPair<Key, Val> valueBeforeRange(
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keys.begin, RangeMap<Key, Val, KeyRangeRef, Metric>::rangeContaining(keys.begin).value());
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MapPair<Key, Val> valueAfterRange(keys.end,
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RangeMap<Key, Val, KeyRangeRef, Metric>::rangeContaining(keys.end).value());
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RangeMap<Key, Val, KeyRangeRef, Metric, MetricFunc>::map.insert(std::move(valueBeforeRange));
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RangeMap<Key, Val, KeyRangeRef, Metric, MetricFunc>::map.insert(std::move(valueAfterRange));
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return RangeMap<Key, Val, KeyRangeRef, Metric, MetricFunc>::intersectingRanges(keys);
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}
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void rawErase(KeyRange const& range) {
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RangeMap<Key, Val, KeyRangeRef, Metric, MetricFunc>::map.erase(
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RangeMap<Key, Val, KeyRangeRef, Metric, MetricFunc>::map.lower_bound(range.begin),
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RangeMap<Key, Val, KeyRangeRef, Metric, MetricFunc>::map.lower_bound(range.end));
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}
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void rawInsert(Key const& key, Val const& value) {
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MapPair<Key, Val> pair(key, value);
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RangeMap<Key, Val, KeyRangeRef, Metric, MetricFunc>::map.insert(
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pair, true, RangeMap<Key, Val, KeyRangeRef, Metric, MetricFunc>::mf(pair));
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}
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void rawInsert(const std::vector<std::pair<MapPair<Key, Val>, Metric>>& pairs) {
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RangeMap<Key, Val, KeyRangeRef, Metric, MetricFunc>::map.insert(pairs);
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}
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Key mapEnd;
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};
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template <class Val, class Metric = int, class MetricFunc = ConstantMetric<Metric>>
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class CoalescedKeyRefRangeMap : public RangeMap<KeyRef, Val, KeyRangeRef, Metric, MetricFunc>, NonCopyable {
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public:
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explicit CoalescedKeyRefRangeMap(Val v = Val(), Key endKey = allKeys.end)
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: RangeMap<KeyRef, Val, KeyRangeRef, Metric, MetricFunc>(endKey, v), mapEnd(endKey) {}
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void operator=(CoalescedKeyRefRangeMap&& r) noexcept {
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mapEnd = std::move(r.mapEnd);
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RangeMap<KeyRef, Val, KeyRangeRef, Metric, MetricFunc>::operator=(std::move(r));
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}
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void insert(const KeyRangeRef& keys, const Val& value);
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void insert(const KeyRef& key, const Val& value, Arena& arena);
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Key mapEnd;
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};
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template <class Val, class Metric = int, class MetricFunc = ConstantMetric<Metric>>
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class CoalescedKeyRangeMap : public RangeMap<Key, Val, KeyRangeRef, Metric, MetricFunc>, NonCopyable {
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public:
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explicit CoalescedKeyRangeMap(Val v = Val(), Key endKey = allKeys.end)
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: RangeMap<Key, Val, KeyRangeRef, Metric, MetricFunc>(endKey, v), mapEnd(endKey) {}
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void operator=(CoalescedKeyRangeMap&& r) noexcept {
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mapEnd = std::move(r.mapEnd);
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RangeMap<Key, Val, KeyRangeRef, Metric, MetricFunc>::operator=(std::move(r));
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}
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void insert(const KeyRangeRef& keys, const Val& value);
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void insert(const KeyRef& key, const Val& value);
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Key mapEnd;
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};
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class KeyRangeActorMap {
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public:
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void getRangesAffectedByInsertion(const KeyRangeRef& keys, std::vector<KeyRange>& affectedRanges);
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void insert(const KeyRangeRef& keys, const Future<Void>& value) { map.insert(keys, value); }
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void cancel(const KeyRangeRef& keys) { insert(keys, Future<Void>()); }
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bool liveActorAt(const KeyRef& key) {
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Future<Void> actorAt = map[key];
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return actorAt.isValid() && !actorAt.isReady();
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}
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private:
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KeyRangeMap<Future<Void>> map;
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};
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// krm*(): KeyRangeMap-like abstraction stored in the database, accessed through Transactions
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class Transaction;
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class ReadYourWritesTransaction;
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Future<RangeResult> krmGetRanges(Transaction* const& tr,
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Key const& mapPrefix,
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KeyRange const& keys,
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int const& limit = CLIENT_KNOBS->KRM_GET_RANGE_LIMIT,
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int const& limitBytes = CLIENT_KNOBS->KRM_GET_RANGE_LIMIT_BYTES);
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Future<RangeResult> krmGetRanges(Reference<ReadYourWritesTransaction> const& tr,
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Key const& mapPrefix,
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KeyRange const& keys,
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int const& limit = CLIENT_KNOBS->KRM_GET_RANGE_LIMIT,
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int const& limitBytes = CLIENT_KNOBS->KRM_GET_RANGE_LIMIT_BYTES);
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void krmSetPreviouslyEmptyRange(Transaction* tr,
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const KeyRef& mapPrefix,
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const KeyRangeRef& keys,
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const ValueRef& newValue,
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const ValueRef& oldEndValue);
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void krmSetPreviouslyEmptyRange(struct CommitTransactionRef& tr,
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Arena& trArena,
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const KeyRef& mapPrefix,
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const KeyRangeRef& keys,
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const ValueRef& newValue,
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const ValueRef& oldEndValue);
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Future<Void> krmSetRange(Transaction* const& tr, Key const& mapPrefix, KeyRange const& range, Value const& value);
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Future<Void> krmSetRange(Reference<ReadYourWritesTransaction> const& tr,
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Key const& mapPrefix,
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KeyRange const& range,
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Value const& value);
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Future<Void> krmSetRangeCoalescing(Transaction* const& tr,
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Key const& mapPrefix,
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KeyRange const& range,
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KeyRange const& maxRange,
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Value const& value);
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Future<Void> krmSetRangeCoalescing(Reference<ReadYourWritesTransaction> const& tr,
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Key const& mapPrefix,
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KeyRange const& range,
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KeyRange const& maxRange,
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Value const& value);
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RangeResult krmDecodeRanges(KeyRef mapPrefix, KeyRange keys, RangeResult kv);
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template <class Val, class Metric, class MetricFunc>
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std::vector<KeyRangeWith<Val>> KeyRangeMap<Val, Metric, MetricFunc>::getAffectedRangesAfterInsertion(
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const KeyRangeRef& keys,
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const Val& insertionValue) {
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std::vector<KeyRangeWith<Val>> affectedRanges;
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{ // possible first range if no exact alignment
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auto r = RangeMap<Key, Val, KeyRangeRef, Metric, MetricFunc>::rangeContaining(keys.begin);
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if (r->begin() != keys.begin)
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affectedRanges.push_back(KeyRangeWith<Val>(KeyRangeRef(r->begin(), keys.begin), r->value()));
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}
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affectedRanges.push_back(KeyRangeWith<Val>(keys, insertionValue));
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{ // possible last range if no exact alignment
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auto r = RangeMap<Key, Val, KeyRangeRef, Metric, MetricFunc>::rangeContaining(keys.end);
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if (r->begin() != keys.end)
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affectedRanges.push_back(KeyRangeWith<Val>(KeyRangeRef(keys.end, r->end()), r->value()));
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}
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return affectedRanges;
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}
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template <class Val, class Metric, class MetricFunc>
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void CoalescedKeyRangeMap<Val, Metric, MetricFunc>::insert(const KeyRangeRef& keys, const Val& value) {
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ASSERT(keys.end <= mapEnd);
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if (keys.empty())
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return;
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auto begin = RangeMap<Key, Val, KeyRangeRef, Metric, MetricFunc>::map.lower_bound(keys.begin);
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auto end = RangeMap<Key, Val, KeyRangeRef, Metric, MetricFunc>::map.lower_bound(keys.end);
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bool insertEnd = false;
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bool insertBegin = false;
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Val endVal;
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if (keys.end != mapEnd) {
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if (end->key != keys.end) {
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auto before_end = end;
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before_end.decrementNonEnd();
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if (value != before_end->value) {
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insertEnd = true;
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endVal = before_end->value;
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}
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}
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if (!insertEnd && end->value == value && end->key != mapEnd) {
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++end;
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}
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}
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if (keys.begin == allKeys.begin) {
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insertBegin = true;
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} else {
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auto before_begin = begin;
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before_begin.decrementNonEnd();
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if (before_begin->value != value)
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insertBegin = true;
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}
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RangeMap<Key, Val, KeyRangeRef, Metric, MetricFunc>::map.erase(begin, end);
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if (insertEnd) {
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MapPair<Key, Val> p(keys.end, endVal);
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RangeMap<Key, Val, KeyRangeRef, Metric, MetricFunc>::map.insert(
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p, true, RangeMap<Key, Val, KeyRangeRef, Metric, MetricFunc>::mf(p));
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}
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if (insertBegin) {
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MapPair<Key, Val> p(keys.begin, value);
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RangeMap<Key, Val, KeyRangeRef, Metric, MetricFunc>::map.insert(
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p, true, RangeMap<Key, Val, KeyRangeRef, Metric, MetricFunc>::mf(p));
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}
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}
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template <class Val, class Metric, class MetricFunc>
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void CoalescedKeyRangeMap<Val, Metric, MetricFunc>::insert(const KeyRef& key, const Val& value) {
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ASSERT(key < mapEnd);
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auto begin = RangeMap<Key, Val, KeyRangeRef, Metric, MetricFunc>::map.lower_bound(key);
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auto end = begin;
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if (end->key == key)
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++end;
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bool insertEnd = false;
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bool insertBegin = false;
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Val endVal;
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if (!equalsKeyAfter(key, end->key)) {
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auto before_end = end;
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before_end.decrementNonEnd();
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if (value != before_end->value) {
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insertEnd = true;
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endVal = before_end->value;
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}
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}
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if (!insertEnd && end->value == value && end->key != mapEnd) {
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++end;
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}
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if (key == allKeys.begin) {
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insertBegin = true;
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} else {
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auto before_begin = begin;
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before_begin.decrementNonEnd();
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if (before_begin->value != value)
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insertBegin = true;
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}
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RangeMap<Key, Val, KeyRangeRef, Metric, MetricFunc>::map.erase(begin, end);
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if (insertEnd) {
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MapPair<Key, Val> p(keyAfter(key), endVal);
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RangeMap<Key, Val, KeyRangeRef, Metric, MetricFunc>::map.insert(
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p, true, RangeMap<Key, Val, KeyRangeRef, Metric, MetricFunc>::mf(p));
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}
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if (insertBegin) {
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MapPair<Key, Val> p(key, value);
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RangeMap<Key, Val, KeyRangeRef, Metric, MetricFunc>::map.insert(
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p, true, RangeMap<Key, Val, KeyRangeRef, Metric, MetricFunc>::mf(p));
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}
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}
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template <class Val, class Metric, class MetricFunc>
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void CoalescedKeyRefRangeMap<Val, Metric, MetricFunc>::insert(const KeyRangeRef& keys, const Val& value) {
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ASSERT(keys.end <= mapEnd);
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if (keys.empty())
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return;
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auto begin = RangeMap<KeyRef, Val, KeyRangeRef, Metric, MetricFunc>::map.lower_bound(keys.begin);
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auto end = RangeMap<KeyRef, Val, KeyRangeRef, Metric, MetricFunc>::map.lower_bound(keys.end);
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bool insertEnd = false;
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bool insertBegin = false;
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Val endVal;
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if (keys.end != mapEnd) {
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if (end->key != keys.end) {
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auto before_end = end;
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before_end.decrementNonEnd();
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if (value != before_end->value) {
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insertEnd = true;
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endVal = before_end->value;
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}
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}
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if (!insertEnd && end->value == value && end->key != mapEnd) {
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++end;
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}
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}
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if (keys.begin == allKeys.begin) {
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insertBegin = true;
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} else {
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auto before_begin = begin;
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before_begin.decrementNonEnd();
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if (before_begin->value != value)
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insertBegin = true;
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}
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RangeMap<KeyRef, Val, KeyRangeRef, Metric, MetricFunc>::map.erase(begin, end);
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if (insertEnd) {
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MapPair<KeyRef, Val> p(keys.end, endVal);
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RangeMap<KeyRef, Val, KeyRangeRef, Metric, MetricFunc>::map.insert(
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p, true, RangeMap<KeyRef, Val, KeyRangeRef, Metric, MetricFunc>::mf(p));
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}
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if (insertBegin) {
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MapPair<KeyRef, Val> p(keys.begin, value);
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RangeMap<KeyRef, Val, KeyRangeRef, Metric, MetricFunc>::map.insert(
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p, true, RangeMap<KeyRef, Val, KeyRangeRef, Metric, MetricFunc>::mf(p));
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}
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}
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template <class Val, class Metric, class MetricFunc>
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void CoalescedKeyRefRangeMap<Val, Metric, MetricFunc>::insert(const KeyRef& key, const Val& value, Arena& arena) {
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ASSERT(key < mapEnd);
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auto begin = RangeMap<KeyRef, Val, KeyRangeRef, Metric, MetricFunc>::map.lower_bound(key);
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auto end = begin;
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if (end->key == key)
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++end;
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bool insertEnd = false;
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bool insertBegin = false;
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Val endVal;
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if (!equalsKeyAfter(key, end->key)) {
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auto before_end = end;
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before_end.decrementNonEnd();
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if (value != before_end->value) {
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insertEnd = true;
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endVal = before_end->value;
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}
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}
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if (!insertEnd && end->value == value && end->key != mapEnd) {
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++end;
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}
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if (key == allKeys.begin) {
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insertBegin = true;
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} else {
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auto before_begin = begin;
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before_begin.decrementNonEnd();
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if (before_begin->value != value)
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insertBegin = true;
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}
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RangeMap<KeyRef, Val, KeyRangeRef, Metric, MetricFunc>::map.erase(begin, end);
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if (insertEnd) {
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MapPair<KeyRef, Val> p(keyAfter(key, arena), endVal);
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RangeMap<KeyRef, Val, KeyRangeRef, Metric, MetricFunc>::map.insert(
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p, true, RangeMap<KeyRef, Val, KeyRangeRef, Metric, MetricFunc>::mf(p));
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}
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if (insertBegin) {
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MapPair<KeyRef, Val> p(key, value);
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RangeMap<KeyRef, Val, KeyRangeRef, Metric, MetricFunc>::map.insert(
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p, true, RangeMap<KeyRef, Val, KeyRangeRef, Metric, MetricFunc>::mf(p));
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}
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}
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#endif
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