forked from mirrors/gotosocial
50dc179d33
* export highest/lowest ULIDs as proper const * add stop + start to timeline manager, other small fixes * unexport unused interface funcs + tidy up * add LastGot func * add timeline Prune function * test prune * update lastGot
68 lines
1.9 KiB
Go
68 lines
1.9 KiB
Go
/*
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GoToSocial
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Copyright (C) 2021-2022 GoToSocial Authors admin@gotosocial.org
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Affero General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Affero General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package timeline
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import (
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"container/list"
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)
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const (
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defaultDesiredIndexedItemsLength = 400
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defaultDesiredPreparedItemsLength = 50
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)
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func (t *timeline) Prune(desiredPreparedItemsLength int, desiredIndexedItemsLength int) int {
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t.Lock()
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defer t.Unlock()
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pruneList := func(pruneTo int, listToPrune *list.List) int {
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if listToPrune == nil {
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// no need to prune
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return 0
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}
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unprunedLength := listToPrune.Len()
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if unprunedLength <= pruneTo {
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// no need to prune
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return 0
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}
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// work from the back + assemble a slice of entries that we will prune
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amountStillToPrune := unprunedLength - pruneTo
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itemsToPrune := make([]*list.Element, 0, amountStillToPrune)
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for e := listToPrune.Back(); amountStillToPrune > 0; e = e.Prev() {
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itemsToPrune = append(itemsToPrune, e)
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amountStillToPrune--
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}
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// remove the entries we found
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var totalPruned int
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for _, e := range itemsToPrune {
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listToPrune.Remove(e)
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totalPruned++
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}
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return totalPruned
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}
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prunedPrepared := pruneList(desiredPreparedItemsLength, t.preparedItems.data)
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prunedIndexed := pruneList(desiredIndexedItemsLength, t.indexedItems.data)
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return prunedPrepared + prunedIndexed
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}
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