mirror of
https://github.com/ProtonMail/proton-bridge.git
synced 2025-12-10 04:36:43 +00:00
66 lines
2.0 KiB
Go
66 lines
2.0 KiB
Go
// Copyright (c) 2021 Proton Technologies AG
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//
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// This file is part of ProtonMail Bridge.
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//
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// ProtonMail Bridge is free software: you can redistribute it and/or modify
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// it under the terms of the GNU 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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//
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// ProtonMail Bridge 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 General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with ProtonMail Bridge. If not, see <https://www.gnu.org/licenses/>.
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package imap
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import (
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"fmt"
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"sync"
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)
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// msgBuildCountHistogram is used to analyse and log the number of repetitive
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// downloads of requested messages per one fetch. The number of builds per each
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// messageID is stored in persistent database. The msgBuildCountHistogram will
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// take this number for each message in ongoing fetch and create histogram of
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// repeats.
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//
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// Example: During `fetch 1:300` there were
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// - 100 messages were downloaded first time
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// - 100 messages were downloaded second time
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// - 99 messages were downloaded 10th times
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// - 1 messages were downloaded 100th times.
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type msgBuildCountHistogram struct {
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// Key represents how many times message was build.
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// Value stores how many messages are build X times based on the key.
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counts map[uint32]uint32
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lock sync.Locker
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}
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func newMsgBuildCountHistogram() *msgBuildCountHistogram {
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return &msgBuildCountHistogram{
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counts: map[uint32]uint32{},
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lock: &sync.Mutex{},
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}
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}
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func (c *msgBuildCountHistogram) String() string {
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res := ""
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for nRebuild, counts := range c.counts {
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if res != "" {
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res += ", "
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}
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res += fmt.Sprintf("[%d]:%d", nRebuild, counts)
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}
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return res
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}
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func (c *msgBuildCountHistogram) add(nRebuild uint32) {
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c.lock.Lock()
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defer c.lock.Unlock()
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c.counts[nRebuild]++
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}
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