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https://codeberg.org/forgejo/forgejo.git
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58dfaf3a75Although some features are mixed together in this PR, this PR is not
that large, and these features are all related.
Actually there are more than 70 lines are for a toy "test queue", so
this PR is quite simple.
Major features:
1. Allow site admin to clear a queue (remove all items in a queue)
* Because there is no transaction, the "unique queue" could be corrupted
in rare cases, that's unfixable.
* eg: the item is in the "set" but not in the "list", so the item would
never be able to be pushed into the queue.
* Now site admin could simply clear the queue, then everything becomes
correct, the lost items could be re-pushed into queue by future
operations.
3. Split the "admin/monitor" to separate pages
4. Allow to download diagnosis report
* In history, there were many users reporting that Gitea queue gets
stuck, or Gitea's CPU is 100%
* With diagnosis report, maintainers could know what happens clearly
The diagnosis report sample:
[gitea-diagnosis-20230510-192913.zip](https://github.com/go-gitea/gitea/files/11441346/gitea-diagnosis-20230510-192913.zip)
, use "go tool pprof profile.dat" to view the report.
Screenshots:
---------
Co-authored-by: Jason Song <i@wolfogre.com>
Co-authored-by: Giteabot <teabot@gitea.io>
131 lines
2.3 KiB
Go
131 lines
2.3 KiB
Go
// Copyright 2023 The Gitea Authors. All rights reserved.
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// SPDX-License-Identifier: MIT
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package queue
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import (
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"context"
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"errors"
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"sync"
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"time"
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"code.gitea.io/gitea/modules/container"
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)
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var errChannelClosed = errors.New("channel is closed")
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type baseChannel struct {
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c chan []byte
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set container.Set[string]
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mu sync.Mutex
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isUnique bool
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}
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var _ baseQueue = (*baseChannel)(nil)
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func newBaseChannelGeneric(cfg *BaseConfig, unique bool) (baseQueue, error) {
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q := &baseChannel{c: make(chan []byte, cfg.Length), isUnique: unique}
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if unique {
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q.set = container.Set[string]{}
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}
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return q, nil
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}
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func newBaseChannelSimple(cfg *BaseConfig) (baseQueue, error) {
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return newBaseChannelGeneric(cfg, false)
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}
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func newBaseChannelUnique(cfg *BaseConfig) (baseQueue, error) {
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return newBaseChannelGeneric(cfg, true)
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}
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func (q *baseChannel) PushItem(ctx context.Context, data []byte) error {
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if q.c == nil {
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return errChannelClosed
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}
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if q.isUnique {
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q.mu.Lock()
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has := q.set.Contains(string(data))
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q.mu.Unlock()
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if has {
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return ErrAlreadyInQueue
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}
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}
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select {
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case q.c <- data:
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if q.isUnique {
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q.mu.Lock()
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q.set.Add(string(data))
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q.mu.Unlock()
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}
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return nil
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case <-time.After(pushBlockTime):
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return context.DeadlineExceeded
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case <-ctx.Done():
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return ctx.Err()
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}
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}
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func (q *baseChannel) PopItem(ctx context.Context) ([]byte, error) {
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select {
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case data, ok := <-q.c:
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if !ok {
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return nil, errChannelClosed
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}
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q.mu.Lock()
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q.set.Remove(string(data))
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q.mu.Unlock()
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return data, nil
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case <-ctx.Done():
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return nil, ctx.Err()
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}
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}
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func (q *baseChannel) HasItem(ctx context.Context, data []byte) (bool, error) {
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q.mu.Lock()
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defer q.mu.Unlock()
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if !q.isUnique {
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return false, nil
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}
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return q.set.Contains(string(data)), nil
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}
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func (q *baseChannel) Len(ctx context.Context) (int, error) {
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q.mu.Lock()
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defer q.mu.Unlock()
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if q.c == nil {
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return 0, errChannelClosed
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}
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return len(q.c), nil
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}
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func (q *baseChannel) Close() error {
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q.mu.Lock()
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defer q.mu.Unlock()
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close(q.c)
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if q.isUnique {
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q.set = container.Set[string]{}
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}
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return nil
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}
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func (q *baseChannel) RemoveAll(ctx context.Context) error {
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q.mu.Lock()
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defer q.mu.Unlock()
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for q.c != nil && len(q.c) > 0 {
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<-q.c
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}
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if q.isUnique {
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q.set = container.Set[string]{}
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}
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return nil
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}
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