ba526ceffe
* move shutdownfns, terminatefns and hammerfns out of separate goroutines Coalesce the shutdownfns etc into a list of functions that get run at shutdown rather then have them run at goroutines blocked on selects. This may help reduce the background select/poll load in certain configurations. * The LevelDB queues can actually wait on empty instead of polling Slight refactor to cause leveldb queues to wait on empty instead of polling. * Shutdown the shadow level queue once it is empty * Remove bytefifo additional goroutine for readToChan as it can just be run in run * Remove additional removeWorkers goroutine for workers * Simplify the AtShutdown and AtTerminate functions and add Channel Flusher * Add shutdown flusher to CUQ * move persistable channel shutdown stuff to Shutdown Fn * Ensure that UPCQ has the correct config * handle shutdown during the flushing * reduce risk of race between zeroBoost and addWorkers * prevent double shutdown Signed-off-by: Andrew Thornton <art27@cantab.net>
128 lines
3.4 KiB
Go
128 lines
3.4 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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"fmt"
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"code.gitea.io/gitea/modules/log"
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)
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// ChannelQueueType is the type for channel queue
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const ChannelQueueType Type = "channel"
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// ChannelQueueConfiguration is the configuration for a ChannelQueue
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type ChannelQueueConfiguration struct {
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WorkerPoolConfiguration
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Workers int
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Name string
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}
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// ChannelQueue implements Queue
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//
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// A channel queue is not persistable and does not shutdown or terminate cleanly
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// It is basically a very thin wrapper around a WorkerPool
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type ChannelQueue struct {
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*WorkerPool
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shutdownCtx context.Context
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shutdownCtxCancel context.CancelFunc
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terminateCtx context.Context
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terminateCtxCancel context.CancelFunc
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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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// NewChannelQueue creates a memory channel queue
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func NewChannelQueue(handle HandlerFunc, cfg, exemplar interface{}) (Queue, error) {
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configInterface, err := toConfig(ChannelQueueConfiguration{}, 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.(ChannelQueueConfiguration)
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if config.BatchLength == 0 {
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config.BatchLength = 1
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}
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terminateCtx, terminateCtxCancel := context.WithCancel(context.Background())
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shutdownCtx, shutdownCtxCancel := context.WithCancel(terminateCtx)
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queue := &ChannelQueue{
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WorkerPool: NewWorkerPool(handle, config.WorkerPoolConfiguration),
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shutdownCtx: shutdownCtx,
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shutdownCtxCancel: shutdownCtxCancel,
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terminateCtx: terminateCtx,
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terminateCtxCancel: terminateCtxCancel,
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exemplar: exemplar,
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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, ChannelQueueType, 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 (q *ChannelQueue) Run(atShutdown, atTerminate func(func())) {
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atShutdown(q.Shutdown)
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atTerminate(q.Terminate)
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log.Debug("ChannelQueue: %s Starting", q.name)
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_ = q.AddWorkers(q.workers, 0)
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}
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// Push will push data into the queue
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func (q *ChannelQueue) Push(data Data) error {
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if !assignableTo(data, q.exemplar) {
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return fmt.Errorf("Unable to assign data: %v to same type as exemplar: %v in queue: %s", data, q.exemplar, q.name)
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}
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q.WorkerPool.Push(data)
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return nil
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}
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// Shutdown processing from this queue
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func (q *ChannelQueue) Shutdown() {
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q.lock.Lock()
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defer q.lock.Unlock()
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select {
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case <-q.shutdownCtx.Done():
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log.Trace("ChannelQueue: %s Already Shutting down", q.name)
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return
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default:
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}
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log.Trace("ChannelQueue: %s Shutting down", q.name)
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go func() {
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log.Trace("ChannelQueue: %s Flushing", q.name)
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if err := q.FlushWithContext(q.terminateCtx); err != nil {
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log.Warn("ChannelQueue: %s Terminated before completed flushing", q.name)
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return
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}
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log.Debug("ChannelQueue: %s Flushed", q.name)
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}()
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q.shutdownCtxCancel()
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log.Debug("ChannelQueue: %s Shutdown", q.name)
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}
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// Terminate this queue and close the queue
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func (q *ChannelQueue) Terminate() {
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log.Trace("ChannelQueue: %s Terminating", q.name)
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q.Shutdown()
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select {
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case <-q.terminateCtx.Done():
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return
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default:
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}
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q.terminateCtxCancel()
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log.Debug("ChannelQueue: %s Terminated", q.name)
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}
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// Name returns the name of this queue
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func (q *ChannelQueue) Name() string {
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return q.name
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}
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func init() {
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queuesMap[ChannelQueueType] = NewChannelQueue
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}
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