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* Make WorkerPools and Queues flushable Adds Flush methods to Queues and the WorkerPool Further abstracts the WorkerPool Adds a final step to Flush the queues in the defer from PrintCurrentTest Fixes an issue with Settings inheritance in queues Signed-off-by: Andrew Thornton <art27@cantab.net> * Change to for loop * Add IsEmpty and begin just making the queues composed WorkerPools * subsume workerpool into the queues and create a flushable interface * Add manager command * Move flushall to queue.Manager and add to testlogger * As per @guillep2k * as per @guillep2k * Just make queues all implement flushable and clean up the wrapped queue flushes * cope with no timeout Co-authored-by: Lauris BH <lauris@nix.lv>
198 lines
4.6 KiB
Go
198 lines
4.6 KiB
Go
// Copyright 2019 The Gitea Authors. All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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package queue
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import (
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"context"
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"encoding/json"
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"fmt"
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"sync"
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"sync/atomic"
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"time"
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"code.gitea.io/gitea/modules/log"
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"gitea.com/lunny/levelqueue"
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)
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// LevelQueueType is the type for level queue
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const LevelQueueType Type = "level"
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// LevelQueueConfiguration is the configuration for a LevelQueue
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type LevelQueueConfiguration struct {
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WorkerPoolConfiguration
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DataDir string
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Workers int
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Name string
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}
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// LevelQueue implements a disk library queue
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type LevelQueue struct {
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*WorkerPool
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queue *levelqueue.Queue
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closed chan struct{}
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terminated chan struct{}
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lock sync.Mutex
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exemplar interface{}
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workers int
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name string
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}
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// NewLevelQueue creates a ledis local queue
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func NewLevelQueue(handle HandlerFunc, cfg, exemplar interface{}) (Queue, error) {
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configInterface, err := toConfig(LevelQueueConfiguration{}, cfg)
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if err != nil {
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return nil, err
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}
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config := configInterface.(LevelQueueConfiguration)
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internal, err := levelqueue.Open(config.DataDir)
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if err != nil {
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return nil, err
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}
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queue := &LevelQueue{
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WorkerPool: NewWorkerPool(handle, config.WorkerPoolConfiguration),
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queue: internal,
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exemplar: exemplar,
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closed: make(chan struct{}),
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terminated: make(chan struct{}),
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workers: config.Workers,
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name: config.Name,
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}
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queue.qid = GetManager().Add(queue, LevelQueueType, config, exemplar)
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return queue, nil
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}
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// Run starts to run the queue
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func (l *LevelQueue) Run(atShutdown, atTerminate func(context.Context, func())) {
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atShutdown(context.Background(), l.Shutdown)
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atTerminate(context.Background(), l.Terminate)
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log.Debug("LevelQueue: %s Starting", l.name)
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go func() {
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_ = l.AddWorkers(l.workers, 0)
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}()
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go l.readToChan()
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log.Trace("LevelQueue: %s Waiting til closed", l.name)
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<-l.closed
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log.Trace("LevelQueue: %s Waiting til done", l.name)
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l.Wait()
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log.Trace("LevelQueue: %s Waiting til cleaned", l.name)
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ctx, cancel := context.WithCancel(context.Background())
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atTerminate(ctx, cancel)
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l.CleanUp(ctx)
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cancel()
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log.Trace("LevelQueue: %s Cleaned", l.name)
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}
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func (l *LevelQueue) readToChan() {
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for {
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select {
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case <-l.closed:
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// tell the pool to shutdown.
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l.cancel()
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return
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default:
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atomic.AddInt64(&l.numInQueue, 1)
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bs, err := l.queue.RPop()
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if err != nil {
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if err != levelqueue.ErrNotFound {
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log.Error("LevelQueue: %s Error on RPop: %v", l.name, err)
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}
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atomic.AddInt64(&l.numInQueue, -1)
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time.Sleep(time.Millisecond * 100)
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continue
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}
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if len(bs) == 0 {
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atomic.AddInt64(&l.numInQueue, -1)
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time.Sleep(time.Millisecond * 100)
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continue
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}
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data, err := unmarshalAs(bs, l.exemplar)
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if err != nil {
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log.Error("LevelQueue: %s Failed to unmarshal with error: %v", l.name, err)
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atomic.AddInt64(&l.numInQueue, -1)
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time.Sleep(time.Millisecond * 100)
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continue
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}
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log.Trace("LevelQueue %s: Task found: %#v", l.name, data)
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l.WorkerPool.Push(data)
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atomic.AddInt64(&l.numInQueue, -1)
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}
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}
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}
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// Push will push the indexer data to queue
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func (l *LevelQueue) Push(data Data) error {
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if !assignableTo(data, l.exemplar) {
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return fmt.Errorf("Unable to assign data: %v to same type as exemplar: %v in %s", data, l.exemplar, l.name)
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}
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bs, err := json.Marshal(data)
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if err != nil {
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return err
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}
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return l.queue.LPush(bs)
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}
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// IsEmpty checks whether the queue is empty
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func (l *LevelQueue) IsEmpty() bool {
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if !l.WorkerPool.IsEmpty() {
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return false
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}
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return l.queue.Len() == 0
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}
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// Shutdown this queue and stop processing
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func (l *LevelQueue) Shutdown() {
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l.lock.Lock()
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defer l.lock.Unlock()
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log.Trace("LevelQueue: %s Shutting down", l.name)
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select {
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case <-l.closed:
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default:
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close(l.closed)
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}
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log.Debug("LevelQueue: %s Shutdown", l.name)
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}
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// Terminate this queue and close the queue
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func (l *LevelQueue) Terminate() {
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log.Trace("LevelQueue: %s Terminating", l.name)
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l.Shutdown()
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l.lock.Lock()
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select {
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case <-l.terminated:
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l.lock.Unlock()
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default:
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close(l.terminated)
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l.lock.Unlock()
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if log.IsDebug() {
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log.Debug("LevelQueue: %s Closing with %d tasks left in queue", l.name, l.queue.Len())
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}
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if err := l.queue.Close(); err != nil && err.Error() != "leveldb: closed" {
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log.Error("Error whilst closing internal queue in %s: %v", l.name, err)
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}
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}
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log.Debug("LevelQueue: %s Terminated", l.name)
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}
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// Name returns the name of this queue
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func (l *LevelQueue) Name() string {
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return l.name
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}
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func init() {
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queuesMap[LevelQueueType] = NewLevelQueue
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}
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