redo the job queue again and reorganize the workers

src/CacheItem/NewItem.go

@@ -3,15 +3,13 @@ package CacheItem
 import (
 	"crazyfs/config"
 	"crazyfs/file"
-	"fmt"
 	"os"
 	"path/filepath"
-	"strings"
 	"time"
 )
 
 func NewItem(fullPath string, info os.FileInfo) *Item {
-	RetardCheck(fullPath)
+	file.RetardCheck(fullPath)
 	if config.GetConfig().CachePrintNew {
 		log.Debugf("CACHEITEM:New - New cache item: %s", fullPath)
 	}
@@ -86,14 +84,3 @@ func NewItem(fullPath string, info os.FileInfo) *Item {
 		Encoding:  &encoding,
 	}
 }
-
-func PathOutsideRoot(fullPath string) bool {
-	return !strings.HasPrefix(fullPath, config.GetConfig().RootDir)
-}
-
-// RetardCheck makes sure we never do anything outside the root dir.
-func RetardCheck(fullPath string) {
-	if PathOutsideRoot(fullPath) {
-		panic(fmt.Sprintf("NewItem was not passed an absolute path. The path must start with the RootDir (%s). Failing path: %s", config.GetConfig().RootDir, fullPath))
-	}
-}

src/Crawlers/DirectoryCrawlerWorkers.go

@@ -0,0 +1,36 @@
+package Crawlers
+
+import (
+	"crazyfs/Workers"
+	"crazyfs/config"
+	"crazyfs/globals"
+	"sync/atomic"
+)
+
+func InitializeDirectoryCrawlerWorkers() *globals.DcWorkers {
+	if globals.DirectoryCrawlers != nil {
+		panic("DirectoryCrawlers has already been defined!")
+	}
+	workers := Workers.InitializeWorkers(directoryCrawlerWorker)
+	d := &globals.DcWorkers{}
+	d.Queue = workers.Queue
+	d.BusyWorkers = workers.BusyWorkers
+	globals.DirectoryCrawlers = d
+	log.Debugf("CRAWLERS - Started %d directory crawler workers.", config.GetConfig().DirectoryCrawlers)
+	return d
+}
+
+func directoryCrawlerWorker(w *Workers.CrawlWorkers) {
+	for {
+		job := w.Queue.GetJob()
+		atomic.AddInt32(&w.BusyWorkers, 1)
+
+		err := job.Walker.ProcessPath(job.StartPath)
+		if err != nil {
+			log.Warnf("WORKER - %s - %s", job.StartPath, err)
+		}
+
+		job.Walker.Wg.Done()
+		atomic.AddInt32(&w.BusyWorkers, -1)
+	}
+}

src/Crawlers/ElasticCrawlerWorkers.go

@@ -0,0 +1,44 @@
+package Crawlers
+
+import (
+	"crazyfs/SharedCache"
+	"crazyfs/Workers"
+	"crazyfs/config"
+	"crazyfs/elastic"
+	"crazyfs/globals"
+	"sync/atomic"
+)
+
+func InitializeElasticCrawlerWorkers() *globals.DcWorkers {
+	if globals.ElasticCrawlers != nil {
+		panic("ElasticCrawlers has already been defined!")
+	}
+	workers := Workers.InitializeWorkers(elasticDeleteWorker)
+	d := &globals.DcWorkers{}
+	d.Queue = workers.Queue
+	d.BusyWorkers = workers.BusyWorkers
+	globals.ElasticCrawlers = d
+	log.Debugf("CRAWLERS - Started %d elastic sync workers.", config.GetConfig().ElasticsearchSyncThreads)
+	return d
+}
+
+func elasticDeleteWorker(w *Workers.CrawlWorkers) {
+	for {
+		job := w.Queue.GetJob()
+		atomic.AddInt32(&w.BusyWorkers, 1)
+
+		if _, ok := SharedCache.Cache.Get(job.StartPath); !ok {
+			// If a key in Elastic does not exist in the LRU cache, delete it from Elastic.
+			e := *job.Extra
+			key := e["key"].(string)
+			err := elastic.DeleteFromElasticsearch(key)
+			if err != nil {
+				log.Errorf(`ELASTIC:Delete - Error deleting key "%s" - %s`, key, err)
+			} else {
+				log.Debugf(`ELASTIC:Delete - Deleted path: "%s"`, job.StartPath)
+			}
+		}
+
+		atomic.AddInt32(&w.BusyWorkers, -1)
+	}
+}

src/Crawlers/init.go

@@ -0,0 +1,12 @@
+package Crawlers
+
+import (
+	"crazyfs/logging"
+	"github.com/sirupsen/logrus"
+)
+
+var log *logrus.Logger
+
+func init() {
+	log = logging.GetLogger()
+}

src/DirectoryCrawler/DirectoryCrawler.go

@@ -3,6 +3,7 @@ package DirectoryCrawler
 import (
 	"crazyfs/CacheItem"
 	"crazyfs/SharedCache"
+	"crazyfs/Walk"
 	"crazyfs/file"
 	"os"
 	"path/filepath"
@@ -35,11 +36,13 @@ type FinishedCrawl struct {
 type DirectoryCrawler struct {
 	visited sync.Map
 	wg      sync.WaitGroup
+	queue   *Walk.JobQueue
 }
 
-func NewDirectoryCrawler() *DirectoryCrawler {
+func NewDirectoryCrawler(queue *Walk.JobQueue) *DirectoryCrawler {
 	return &DirectoryCrawler{
 		visited: sync.Map{},
+		queue:   queue,
 	}
 }
 

src/DirectoryCrawler/crawl.go

@@ -3,7 +3,7 @@ package DirectoryCrawler
 import (
 	"crazyfs/CacheItem"
 	"crazyfs/SharedCache"
-	"crazyfs/Workers"
+	"crazyfs/Walk"
 	"crazyfs/config"
 	"crazyfs/file"
 	"errors"
@@ -16,7 +16,7 @@ import (
 )
 
 func (dc *DirectoryCrawler) walkRecursiveFunc(fullPath string, info os.FileInfo, err error) error {
-	CacheItem.RetardCheck(fullPath)
+	file.RetardCheck(fullPath)
 	processErr := dc.processPath(fullPath, info)
 	if processErr != nil {
 		log.Errorf(`CRAWLER:walkRecursiveFunc - failed on "%s": %s`, fullPath, processErr)
@@ -26,7 +26,7 @@ func (dc *DirectoryCrawler) walkRecursiveFunc(fullPath string, info os.FileInfo,
 }
 
 func (dc *DirectoryCrawler) walkNonRecursiveFunc(fullPath string, dir os.DirEntry, err error) error {
-	CacheItem.RetardCheck(fullPath)
+	file.RetardCheck(fullPath)
 	info, infoErr := dir.Info()
 	if infoErr != nil {
 		log.Errorf(`CRAWLER:walkNonRecursiveFunc - Get info failed on "%s": %s`, fullPath, infoErr)
@@ -41,7 +41,7 @@ func (dc *DirectoryCrawler) walkNonRecursiveFunc(fullPath string, dir os.DirEntr
 }
 
 func (dc *DirectoryCrawler) Crawl(fullPath string, walkFunc func(string, os.FileInfo, error) error) error {
-	CacheItem.RetardCheck(fullPath)
+	file.RetardCheck(fullPath)
 
 	// Set default value.
 	if walkFunc == nil {
@@ -93,7 +93,7 @@ func (dc *DirectoryCrawler) Crawl(fullPath string, walkFunc func(string, os.File
 		}
 
 		// If the path is a directory, start a walk
-		err := Workers.Walk(fullPath, config.FollowSymlinks, walkFunc)
+		err := Walk.Walk(fullPath, config.FollowSymlinks, walkFunc, dc.queue)
 		if err != nil {
 			log.Errorf(`CRAWLER:Crawl - Crawl for "%s" failed: %s`, fullPath, err)
 		}
@@ -106,8 +106,8 @@ func (dc *DirectoryCrawler) Crawl(fullPath string, walkFunc func(string, os.File
 
 // CrawlNoRecursion this function crawls a file or directory and does not recurse into any subdirectories. Also returns the result of the crawl.
 func (dc *DirectoryCrawler) CrawlNoRecursion(fullPath string) (*CacheItem.Item, error) {
-	CacheItem.RetardCheck(fullPath)
-	
+	file.RetardCheck(fullPath)
+
 	// TODO: check if symlink and reject if it is
 
 	readyToStart := dc.startCrawl(fullPath, "walkNonRecursive")

src/ResponseItem/ResponseItem.go

@@ -5,6 +5,7 @@ import (
 	"crazyfs/DirectoryCrawler"
 	"crazyfs/SharedCache"
 	"crazyfs/config"
+	"crazyfs/globals"
 	"crazyfs/logging"
 	"github.com/sirupsen/logrus"
 	"path/filepath"
@@ -84,7 +85,7 @@ func NewResponseItem(cacheItem *CacheItem.Item) *ResponseItem {
 					crawlRelPath := filepath.Join(config.GetConfig().RootDir, child)
 					// TODO: when does this get triggered?
 					log.Debugf(`NewResponseItem:Crawl - Not in cache, crawling: "%s" ("%s")`, child, crawlRelPath)
-					dc := DirectoryCrawler.NewDirectoryCrawler()
+					dc := DirectoryCrawler.NewDirectoryCrawler(globals.DirectoryCrawlers.Queue)
 					item, err := dc.CrawlNoRecursion(crawlRelPath)
 					if err != nil {
 						log.Errorf("NewResponseItem:Crawl - %s", err)

src/Walk/Walk.go

@@ -1,12 +1,18 @@
-package Workers
+package Walk
 
-import "path/filepath"
+import (
+	"crazyfs/file"
+	"path/filepath"
+)
 
 // Walk is a wrapper function for the Walker object that mimics the behavior of filepath.Walk, and doesn't follow symlinks.
-func Walk(root string, followSymlinks bool, walkFn filepath.WalkFunc) error {
+func Walk(root string, followSymlinks bool, walkFn filepath.WalkFunc, queue *JobQueue) error {
+	file.RetardCheck(root)
 	w := Walker{
 		root:           root,
 		followSymlinks: followSymlinks,
+		walkFunc:       walkFn,
+		queue:          queue,
 	}
 	return w.Walk("", walkFn)
 }

src/Walk/WalkQueue.go

@@ -0,0 +1,60 @@
+package Walk
+
+import (
+	"github.com/enriquebris/goconcurrentqueue"
+	"sync"
+)
+
+// This is a queue implementation that doesn't rely on channels. This way of doing things should be more memory-efficient.
+
+// Job is an individual job passed to the Workers.
+type Job struct {
+	StartPath string
+	Walker    *Walker // A pointer to the shared Walker object is passed as well.
+	Extra     *map[string]interface{}
+}
+
+// JobQueue is the Queue that workers pull jobs from.
+type JobQueue struct {
+	fifo *goconcurrentqueue.FIFO
+
+	// Use our own condition to notify workers since `DequeueOrWaitForNextElement()` is limited to max 1000.
+	mutex sync.RWMutex
+	cond  *sync.Cond
+}
+
+func NewJobQueue() *JobQueue {
+	q := &JobQueue{}
+	q.fifo = goconcurrentqueue.NewFIFO()
+	q.cond = sync.NewCond(&q.mutex)
+	return q
+}
+
+// AddJob adds a job to the queue and signals the workers so they know to pick it up.
+func (q *JobQueue) AddJob(job Job) {
+	err := q.fifo.Enqueue(job)
+	if err != nil {
+		// Some sort of logic error or timeout occurred.
+		panic(err)
+	}
+	q.cond.Signal()
+}
+
+// GetJob is how a worker pulls a job from the queue.
+func (q *JobQueue) GetJob() Job {
+	q.mutex.Lock()
+	defer q.mutex.Unlock()
+	for q.GetQueueSize() == 0 {
+		q.cond.Wait()
+	}
+	job, err := q.fifo.DequeueOrWaitForNextElement()
+	if err != nil {
+		panic(err)
+	}
+	return job.(Job)
+}
+
+// GetQueueSize returns the size of the queue.
+func (q *JobQueue) GetQueueSize() int {
+	return q.fifo.GetLen()
+}

src/Walk/Walker.go

@@ -1,4 +1,4 @@
-package Workers
+package Walk
 
 import (
 	"errors"
@@ -15,20 +15,21 @@ var ErrNotDir = errors.New("not a directory")
 
 // Walker is constructed for each Walk() function invocation.
 type Walker struct {
-	wg             sync.WaitGroup // used to sync the progress of all workers.
+	Wg             sync.WaitGroup // used to sync the progress of all workers.
 	root           string
 	followSymlinks bool
 	walkFunc       filepath.WalkFunc
+	queue          *JobQueue
 }
 
 // addJob increments the job counter and pushes the path to the job queue.
-func (w *Walker) addJob(job WalkJob) {
-	w.wg.Add(1)
-	Queue.AddJob(job)
+func (w *Walker) addJob(job Job) {
+	w.Wg.Add(1)
+	w.queue.AddJob(job)
 }
 
-// processPath processes one path.
-func (w *Walker) processPath(relPath string) error {
+// ProcessPath processes one path.
+func (w *Walker) ProcessPath(relPath string) error {
 	fullPath := filepath.Join(w.root, relPath)
 	names, err := readDirNames(fullPath)
 	if err != nil {
@@ -59,7 +60,7 @@ func (w *Walker) processPath(relPath string) error {
 
 		// If this child is a directory, add it to the queue then move on.
 		if err == nil && info.Mode().IsDir() {
-			w.addJob(WalkJob{
+			w.addJob(Job{
 				StartPath: subPath,
 				Walker:    w,
 			})
@@ -73,8 +74,6 @@ func (w *Walker) processPath(relPath string) error {
 func (w *Walker) Walk(relPath string, walkFn filepath.WalkFunc) error {
 	// TODO: compare with filepath.WalkDir()
 
-	w.walkFunc = walkFn
-
 	// Parse the beginning path.
 	fullPath := filepath.Join(w.root, relPath)
 	info, err := w.lstat(relPath)
@@ -95,12 +94,12 @@ func (w *Walker) Walk(relPath string, walkFn filepath.WalkFunc) error {
 	}
 
 	// Let the workers handle everything else.
-	w.addJob(WalkJob{
+	w.addJob(Job{
 		StartPath: relPath,
 		Walker:    w,
 	})
 
 	// Wait for the workers to finish reading the file system.
-	w.wg.Wait()
+	w.Wg.Wait()
 	return nil
 }

src/Walk/file.go

@@ -1,4 +1,4 @@
-package Workers
+package Walk
 
 import (
 	"os"

src/Walk/init.go

@@ -0,0 +1,12 @@
+package Walk
+
+import (
+	"crazyfs/logging"
+	"github.com/sirupsen/logrus"
+)
+
+var log *logrus.Logger
+
+func init() {
+	log = logging.GetLogger()
+}

src/Workers/Queue.go

@@ -1,56 +0,0 @@
-package Workers
-
-import (
-	"sync"
-)
-
-// This is a queue implementation that doesn't rely on channels. This way of doing things should be more memory-efficient.
-
-// WalkJob is an individual job passed to the Workers.
-type WalkJob struct {
-	StartPath string
-	Walker    *Walker // A pointer to the shared Walker object is passed as well.
-}
-
-// WalkJobQueue is the Queue that workers pull jobs from.
-type WalkJobQueue struct {
-	jobs  []WalkJob
-	mutex sync.RWMutex
-	cond  *sync.Cond
-}
-
-func NewJobQueue() *WalkJobQueue {
-	q := &WalkJobQueue{}
-	q.cond = sync.NewCond(&q.mutex)
-	return q
-}
-
-// AddJob adds a job to the queue and signals the workers so they know to pick it up.
-func (q *WalkJobQueue) AddJob(job WalkJob) {
-	q.mutex.Lock()
-	defer q.mutex.Unlock()
-	q.jobs = append(q.jobs, job)
-	q.cond.Signal()
-}
-
-// GetJob is how a worker pulls a job from the queue.
-func (q *WalkJobQueue) GetJob() WalkJob {
-	q.mutex.Lock()
-	defer q.mutex.Unlock()
-
-	for len(q.jobs) == 0 {
-		q.cond.Wait()
-	}
-
-	job := q.jobs[0]
-	q.jobs = q.jobs[1:]
-
-	return job
-}
-
-// GetQueueSize returns the size of the queue.
-func (q *WalkJobQueue) GetQueueSize() int {
-	q.mutex.RLock()
-	defer q.mutex.RUnlock()
-	return len(q.jobs)
-}

src/Workers/worker.go

@@ -1,39 +1,28 @@
 package Workers
 
 import (
+	"crazyfs/Walk"
 	"crazyfs/config"
-	"sync/atomic"
 )
 
 // worker.go holds the worker function for `Walk()`.
 
-// Queue is the global walk job queue.
-var Queue *WalkJobQueue
+type CrawlWorkerFunc func(workerData *CrawlWorkers)
 
-// BusyWorkers is an atomic counter for the number of active Workers
-var BusyWorkers int32
+type CrawlWorkers struct {
+	Queue       *Walk.JobQueue
+	BusyWorkers int32
+	WorkerFunc  CrawlWorkerFunc
+}
 
 // InitializeWorkers starts the number of Workers defined by the config.
-func InitializeWorkers() {
-	Queue = NewJobQueue()
+func InitializeWorkers(workerFunc CrawlWorkerFunc) *CrawlWorkers {
+	w := &CrawlWorkers{
+		WorkerFunc: workerFunc,
+	}
+	w.Queue = Walk.NewJobQueue()
 	for n := 1; n <= config.GetConfig().DirectoryCrawlers; n++ {
-		go worker()
-	}
-	log.Debugf("WORKERS - Started %d directory crawler Workers.", config.GetConfig().DirectoryCrawlers)
-}
-
-// worker processes jobs forever.
-func worker() {
-	for {
-		job := Queue.GetJob()
-
-		atomic.AddInt32(&BusyWorkers, 1)
-		err := job.Walker.processPath(job.StartPath)
-		if err != nil {
-			log.Warnf("WORKER - %s - %s", job.StartPath, err)
-		}
-
-		job.Walker.wg.Done()
-		atomic.AddInt32(&BusyWorkers, -1)
+		go w.WorkerFunc(w)
 	}
+	return w
 }

src/api/helpers/HandleFileNotFound.go

@@ -4,6 +4,7 @@ import (
 	"crazyfs/CacheItem"
 	"crazyfs/DirectoryCrawler"
 	"crazyfs/SharedCache"
+	"crazyfs/globals"
 	"net/http"
 	"os"
 	"time"
@@ -14,7 +15,7 @@ func HandleFileNotFound(relPath string, fullPath string, w http.ResponseWriter)
 	// TODO: implement some sort of backoff or delay for repeated calls to recache the same path.
 
 	log.Debugf(`HELPERS:HandleFileNotFound:Crawl - Not in cache, crawling: "%s"`, fullPath)
-	dc := DirectoryCrawler.NewDirectoryCrawler()
+	dc := DirectoryCrawler.NewDirectoryCrawler(globals.DirectoryCrawlers.Queue)
 
 	// Check if this is a symlink. We do this before CrawlNoRecursion() because we want to tell the end user that
 	// we're not going to resolve this symlink.
@@ -83,7 +84,7 @@ func HandleFileNotFound(relPath string, fullPath string, w http.ResponseWriter)
 	// Start a recursive crawl in the background.
 	go func() {
 		log.Debugf("HELPERS:HandleFileNotFound:Crawl - Starting background recursive crawl for %s", fullPath)
-		dc := DirectoryCrawler.NewDirectoryCrawler()
+		dc := DirectoryCrawler.NewDirectoryCrawler(globals.DirectoryCrawlers.Queue)
 		start := time.Now()
 		err := dc.Crawl(fullPath, nil)
 		if err != nil {

src/api/routes/admin/AdminCrawlsInfo.go

@@ -2,10 +2,10 @@ package admin
 
 import (
 	"crazyfs/DirectoryCrawler"
-	"crazyfs/Workers"
 	"crazyfs/api/helpers"
 	"crazyfs/config"
 	"crazyfs/elastic"
+	"crazyfs/globals"
 	"crypto/sha256"
 	"crypto/subtle"
 	"net/http"
@@ -42,18 +42,18 @@ func APIAdminCrawlsInfo(w http.ResponseWriter, r *http.Request) {
 					"finished": DirectoryCrawler.GetFinishedCrawls(),
 				},
 				"crawlWorkers": map[string]interface{}{
-					"busy":  atomic.LoadInt32(&Workers.BusyWorkers),
+					"busy":  atomic.LoadInt32(&globals.DirectoryCrawlers.BusyWorkers),
 					"alive": config.GetConfig().DirectoryCrawlers,
 				},
 				"queue": map[string]interface{}{
-					"size": Workers.Queue.GetQueueSize(),
+					"size": globals.DirectoryCrawlers.Queue.GetQueueSize(),
 				},
 				"initialCrawlElapsed": config.InitialCrawlElapsed,
 				"elastic": map[string]interface{}{
 					"deleteWorkers": map[string]interface{}{
-						"busy":      elastic.BusyWorkers,
+						"busy":      globals.ElasticCrawlers.BusyWorkers,
 						"alive":     config.GetConfig().ElasticsearchSyncThreads,
-						"queueSize": elastic.Queue.GetQueueSize(),
+						"queueSize": globals.ElasticCrawlers.Queue.GetQueueSize(),
 					},
 					"syncRunning": map[string]interface{}{
 						"refresh": refreshSyncRunning,

src/cache/crawler.go

@@ -3,9 +3,8 @@ package cache
 import (
 	"crazyfs/DirectoryCrawler"
 	"crazyfs/SharedCache"
-	"crazyfs/Workers"
 	"crazyfs/config"
-	"crazyfs/elastic"
+	"crazyfs/globals"
 	"sync"
 	"sync/atomic"
 	"time"
@@ -13,9 +12,7 @@ import (
 
 func StartCrawler() error {
 	var wg sync.WaitGroup
-	crawlerChan := make(chan struct{}, config.GetConfig().DirectoryCrawlers)
-
-	go startCrawl(&wg, crawlerChan)
+	go startCrawl(&wg)
 
 	ticker := time.NewTicker(60 * time.Second)
 	go logCacheStatus("CACHE STATUS", ticker, log.Debugf)
@@ -23,29 +20,27 @@ func StartCrawler() error {
 	return nil
 }
 
-func startCrawl(wg *sync.WaitGroup, crawlerChan chan struct{}) {
+func startCrawl(wg *sync.WaitGroup) {
 	ticker := time.NewTicker(time.Duration(config.GetConfig().CrawlModeCrawlInterval) * time.Second)
 	defer ticker.Stop()
 
 	time.Sleep(time.Duration(config.GetConfig().CrawlModeCrawlInterval) * time.Second)
 
 	for range ticker.C {
-		crawlerChan <- struct{}{}
 		wg.Add(1)
 		go func() {
 			defer wg.Done()
-			dc := DirectoryCrawler.NewDirectoryCrawler()
-			log.Infoln("CRAWLER - Starting a crawl...")
+			dc := DirectoryCrawler.NewDirectoryCrawler(globals.DirectoryCrawlers.Queue)
+			log.Infoln("CRAWLER - Recurring - Starting a crawl...")
 			start := time.Now()
 			err := dc.Crawl(config.GetConfig().RootDir, nil)
 			if err != nil {
-				log.Warnf("CRAWLER - Crawl failed: %s", err)
+				log.Warnf("CRAWLER - Recurring - Crawl failed: %s", err)
 			} else {
 				duration := time.Since(start).Round(time.Second)
-				log.Infof("CRAWLER - Crawl completed in %s", duration)
-				log.Debugf("%d/%d items in the cache.", config.GetConfig().CacheSize, len(SharedCache.Cache.Keys()))
+				log.Infof("CRAWLER - Recurring - Crawl completed in %s", duration)
+				log.Debugf("%d/%d items in the cache.", len(SharedCache.Cache.Keys()), config.GetConfig().CacheSize)
 			}
-			<-crawlerChan
 		}()
 	}
 }
@@ -56,11 +51,11 @@ func logCacheStatus(msg string, ticker *time.Ticker, logFn func(format string, a
 		if !config.GetConfig().ElasticsearchSyncEnable || InitialCrawlInProgress {
 			logStr := "%s - %d/%d items in the cache. Busy Workers: %d. Jobs queued: %d. Running crawls: %d."
 			logFn(logStr,
-				msg, len(SharedCache.Cache.Keys()), config.GetConfig().CacheSize, atomic.LoadInt32(&Workers.BusyWorkers), Workers.Queue.GetQueueSize(), DirectoryCrawler.GetTotalActiveCrawls())
+				msg, len(SharedCache.Cache.Keys()), config.GetConfig().CacheSize, atomic.LoadInt32(&globals.DirectoryCrawlers.BusyWorkers), globals.DirectoryCrawlers.Queue.GetQueueSize(), DirectoryCrawler.GetTotalActiveCrawls())
 		} else {
 			logStr := "%s - %d/%d items in the cache. Busy Workers: %d. Jobs queued: %d. Running crawls: %d. Busy Elastic delete workers: %d. Elastic deletes queued: %d"
 			logFn(logStr,
-				msg, len(SharedCache.Cache.Keys()), config.GetConfig().CacheSize, atomic.LoadInt32(&Workers.BusyWorkers), Workers.Queue.GetQueueSize(), DirectoryCrawler.GetTotalActiveCrawls(), elastic.BusyWorkers, elastic.Queue.GetQueueSize())
+				msg, len(SharedCache.Cache.Keys()), config.GetConfig().CacheSize, atomic.LoadInt32(&globals.DirectoryCrawlers.BusyWorkers), globals.DirectoryCrawlers.Queue.GetQueueSize(), DirectoryCrawler.GetTotalActiveCrawls(), globals.ElasticCrawlers.BusyWorkers, globals.ElasticCrawlers.Queue.GetQueueSize())
 		}
 	}
 }

src/cache/initial.go

@@ -3,6 +3,7 @@ package cache
 import (
 	"crazyfs/DirectoryCrawler"
 	"crazyfs/config"
+	"crazyfs/globals"
 	"crazyfs/logging"
 	"sync"
 	"time"
@@ -27,7 +28,7 @@ func InitialCrawl() {
 
 	InitialCrawlLock.Lock()
 	InitialCrawlInProgress = true
-	dc := DirectoryCrawler.NewDirectoryCrawler()
+	dc := DirectoryCrawler.NewDirectoryCrawler(globals.DirectoryCrawlers.Queue)
 	//start := time.Now()
 	err := dc.Crawl(config.GetConfig().RootDir, nil)
 	if err != nil {

src/cache/recache.go

@@ -6,6 +6,7 @@ import (
 	"crazyfs/SharedCache"
 	"crazyfs/config"
 	"crazyfs/file"
+	"crazyfs/globals"
 	"errors"
 	"os"
 	"path/filepath"
@@ -25,7 +26,7 @@ func CheckAndRecache(path string) {
 		sem <- struct{}{} // acquire a token
 		go func() {
 			defer func() { <-sem }() // release the token when done
-			dc := DirectoryCrawler.NewDirectoryCrawler()
+			dc := DirectoryCrawler.NewDirectoryCrawler(globals.DirectoryCrawlers.Queue)
 			err := dc.Crawl(path, nil)
 			if err != nil {
 				log.Errorf("CACHE:Recache - %s", err.Error())
@@ -36,7 +37,7 @@ func CheckAndRecache(path string) {
 }
 
 func Recache(path string) error {
-	dc := DirectoryCrawler.NewDirectoryCrawler()
+	dc := DirectoryCrawler.NewDirectoryCrawler(globals.DirectoryCrawlers.Queue)
 	if dc.IsCrawlActive(path, nil) {
 		return errors.New("rejecting crawl, already in progress for this path")
 	}
@@ -46,7 +47,7 @@ func Recache(path string) error {
 	sem <- struct{}{} // acquire a token
 	go func() {
 		defer func() { <-sem }() // release the token when done
-		dc := DirectoryCrawler.NewDirectoryCrawler()
+		dc := DirectoryCrawler.NewDirectoryCrawler(globals.DirectoryCrawlers.Queue)
 		err := dc.Crawl(path, nil)
 		if err != nil {
 			log.Errorf("CACHE:Recache - %s", err.Error())
@@ -87,7 +88,7 @@ func Recache(path string) error {
 				// Update the parent directory in the cache
 				SharedCache.Cache.Add(parentDir, parentItem)
 			}
-		} else if !CacheItem.PathOutsideRoot(parentDir) {
+		} else if !file.PathOutsideRoot(parentDir) {
 			// If the parent directory isn't in the cache, crawl it.
 			log.Infof("CACHE:Recache - Crawling parent directory since it isn't in the cache yet: %s", parentDir)
 			_, err := dc.CrawlNoRecursion(parentDir)

src/config/config.go

@@ -151,11 +151,11 @@ func SetConfig(configFile string) (*Config, error) {
 	}
 
 	if config.DirectoryCrawlers < 1 {
-		return nil, errors.New("crawl_mode_crawl_interval must be more than 1")
+		return nil, errors.New("crawl_mode_crawl_interval must be greater than or equal to 1")
 	}
 
 	if config.CacheSize < 1 {
-		return nil, errors.New("crawl_workers must be more than 1")
+		return nil, errors.New("cache_size must be greater than or equal to 1")
 	}
 
 	if config.CacheRecacheCrawlerLimit < 1 {

src/crazyfs.go

@@ -1,8 +1,8 @@
 package main
 
 import (
+	"crazyfs/Crawlers"
 	"crazyfs/SharedCache"
-	"crazyfs/Workers"
 	"crazyfs/api"
 	"crazyfs/cache"
 	"crazyfs/config"
@@ -115,7 +115,7 @@ func main() {
 
 	// Start the Elastic connection, so it can initialize while we're doing the initial crawl.
 	// If we fail to establish a connection to Elastic, don't kill the entire server. Instead, just disable Elastic.
-	if cfg.ElasticsearchEnable {
+	if cfg.ElasticsearchEnable && !cliArgs.disableElasticSync {
 		esCfg := elasticsearch.Config{
 			Addresses: []string{
 				cfg.ElasticsearchEndpoint,
@@ -126,10 +126,10 @@ func main() {
 		if err != nil {
 			log.Errorf("Error creating the Elasticsearch client: %s", err)
 			elastic.LogElasticQuit()
-			elastic.ElasticEnabled = false
+			elastic.Enabled = false
 		} else {
 			elastic.ElasticClient = es
-			elastic.InitializeWorkers()
+			Crawlers.InitializeElasticCrawlerWorkers()
 			// This could take a minute, so we do this in the background while we crawl.
 			go func() {
 				elastic.EnableElasticsearchConnection()
@@ -149,9 +149,9 @@ func main() {
 		}
 	}
 
-	log.Infof("Elasticsearch enabled: %t", cfg.ElasticsearchEnable)
+	log.Infof("Elasticsearch enabled: %t", cfg.ElasticsearchEnable && !cliArgs.disableElasticSync)
 
-	Workers.InitializeWorkers()
+	Crawlers.InitializeDirectoryCrawlerWorkers()
 
 	cache.InitRecacheSemaphore(cfg.CacheRecacheCrawlerLimit)
 

src/elastic/ElasticDeleteQueue.go

@@ -1,50 +0,0 @@
-package elastic
-
-import "sync"
-
-// More or less like the other queue implementation.
-
-type DeleteJob struct {
-	Key  string
-	Path string
-}
-
-type DeleteJobQueue struct {
-	jobs  []DeleteJob
-	mutex sync.Mutex
-	cond  *sync.Cond
-}
-
-func NewJobQueue() *DeleteJobQueue {
-	q := &DeleteJobQueue{}
-	q.cond = sync.NewCond(&q.mutex)
-	return q
-}
-
-// AddJob adds a job to the queue and signals the workers so they know to pick it up.
-func (q *DeleteJobQueue) AddJob(job DeleteJob) {
-	q.mutex.Lock()
-	q.jobs = append(q.jobs, job)
-	q.mutex.Unlock()
-	q.cond.Signal()
-}
-
-// GetJob is how a worker pulls a job from the queue.
-func (q *DeleteJobQueue) GetJob() DeleteJob {
-	q.mutex.Lock()
-	defer q.mutex.Unlock()
-
-	for len(q.jobs) == 0 {
-		q.cond.Wait()
-	}
-
-	job := q.jobs[0]
-	q.jobs = q.jobs[1:]
-
-	return job
-}
-
-// GetQueueSize returns the size of the queue.
-func (q *DeleteJobQueue) GetQueueSize() int {
-	return len(q.jobs)
-}

src/elastic/ElasticDeleteWorker.go

@@ -1,39 +0,0 @@
-package elastic
-
-import (
-	"crazyfs/SharedCache"
-	"crazyfs/config"
-	"sync/atomic"
-)
-
-// BusyWorkers is an atomic counter for the number of active Workers
-var BusyWorkers int32
-
-// InitializeWorkers starts the number of Workers defined by the config.
-func InitializeWorkers() {
-	Queue = NewJobQueue()
-	for n := 1; n <= config.GetConfig().ElasticsearchSyncThreads; n++ {
-		go worker()
-	}
-	log.Debugf("ELASTIC - Started %d sync workers.", config.GetConfig().ElasticsearchSyncThreads)
-}
-
-// worker processes jobs forever.
-func worker() {
-	for {
-		job := Queue.GetJob()
-		atomic.AddInt32(&BusyWorkers, 1)
-
-		if _, ok := SharedCache.Cache.Get(job.Path); !ok {
-			// If a key in Elastic does not exist in the LRU cache, delete it from Elastic.
-			err := deleteFromElasticsearch(job.Key)
-			if err != nil {
-				log.Errorf(`ELASTIC:Delete - Error deleting key "%s" - %s`, job.Key, err)
-			} else {
-				log.Debugf(`ELASTIC:Delete - Deleted path: "%s"`, job.Path)
-			}
-		}
-
-		atomic.AddInt32(&BusyWorkers, -1)
-	}
-}

src/elastic/ElasticSyncThread.go

@@ -3,18 +3,17 @@ package elastic
 import (
 	"crazyfs/DirectoryCrawler"
 	"crazyfs/config"
+	"crazyfs/globals"
 	"sync"
 	"time"
 )
 
-var Queue *DeleteJobQueue
-
 var syncLock sync.Mutex
 
-var ElasticEnabled bool
+var Enabled bool
 
 func SyncThread() {
-	if !ElasticEnabled {
+	if !Enabled {
 		LogElasticQuit()
 		return
 	}
@@ -41,7 +40,7 @@ func SyncThread() {
 
 // TODO: have the workers exit when the sync job is finished
 func syncElasticsearch(doFullSync bool) {
-	if !ElasticEnabled {
+	if !Enabled {
 		log.Debugln("ELASTIC - Disabled, not syncing.")
 		return
 	}
@@ -81,7 +80,7 @@ func syncElasticsearch(doFullSync bool) {
 
 	startRemoveStaleItemsFromElasticsearch(globalPathsByKey)
 
-	dc := DirectoryCrawler.NewDirectoryCrawler()
+	dc := DirectoryCrawler.NewDirectoryCrawler(globals.DirectoryCrawlers.Queue) // TODO: replace with proper elastic queue
 	err = dc.Crawl(config.GetConfig().RootDir, addToElasticsearch)
 	if err != nil {
 		log.Errorf("ELASTIC - Crawl failed: %s", err)
@@ -101,14 +100,14 @@ func EnableElasticsearchConnection() {
 	esSize, err := getElasticSize()
 	if err != nil {
 		logElasticConnError(err)
-		ElasticEnabled = false
+		Enabled = false
 		return
 	}
-	ElasticEnabled = true
+	Enabled = true
 	log.Infof(`ELASTIC - Connected to index "%s". Contains %d items.`, config.GetConfig().ElasticsearchIndex, esSize)
 }
 
 func LogElasticQuit() {
-	ElasticEnabled = false
+	Enabled = false
 	log.Errorln("ELASTIC - Background thread exiting, Elastic indexing and search will not be available.")
 }

src/elastic/add.go

@@ -29,7 +29,7 @@ func addToElasticsearch(fullPath string, info os.FileInfo, incomingErr error) er
 			// This sort of thing can happen if new files have been added on disk but a scan has not been run to refresh the cache.
 			log.Debugf(`ELASTIC:Add - Path "%s" exists on disk, but not in the LRU cache. Deleting from Elastic.`, relPath)
 			// Delete this item from Elastic in order to avoid any strange inconsistencies.
-			err := deleteFromElasticsearch(encodeToBase64(relPath))
+			err := DeleteFromElasticsearch(encodeToBase64(relPath))
 			if err != nil {
 				log.Errorf("ELASTIC:Add - Failed to delete \"%s\" - %s", relPath, err)
 			}

src/elastic/delete.go

@@ -2,13 +2,20 @@ package elastic
 
 import (
 	"context"
+	"crazyfs/Walk"
 	"crazyfs/config"
+	"crazyfs/globals"
 	"encoding/json"
 	"errors"
 	"fmt"
 	"github.com/elastic/go-elasticsearch/v8/esapi"
 )
 
+type DeleteJob struct {
+	Key  string
+	Path string
+}
+
 func startRemoveStaleItemsFromElasticsearch(pathsByKey map[string]string) {
 	log.Debugln("ELASTIC:Delete - Checking for deleted items that need to be removed from Elastic...")
 
@@ -16,11 +23,18 @@ func startRemoveStaleItemsFromElasticsearch(pathsByKey map[string]string) {
 
 	// For each key in Elasticsearch, create a job to check (and remove it if the key no longer exists in the cache).
 	for path, key := range pathsByKey {
-		Queue.AddJob(DeleteJob{Key: key, Path: path})
+		job := Walk.Job{
+			StartPath: path,
+		}
+		extra := make(map[string]interface{})
+		extra["key"] = key
+		job.Extra = &extra
+
+		globals.ElasticCrawlers.Queue.AddJob(job)
 	}
 }
 
-func deleteFromElasticsearch(key string) error {
+func DeleteFromElasticsearch(key string) error {
 	req := esapi.DeleteRequest{
 		Index:      config.GetConfig().ElasticsearchIndex,
 		DocumentID: key,

src/file/relpath.go

@@ -0,0 +1,18 @@
+package file
+
+import (
+	"crazyfs/config"
+	"fmt"
+	"strings"
+)
+
+func PathOutsideRoot(fullPath string) bool {
+	return !strings.HasPrefix(fullPath, config.GetConfig().RootDir)
+}
+
+// RetardCheck makes sure we never do anything outside the root dir.
+func RetardCheck(fullPath string) {
+	if PathOutsideRoot(fullPath) {
+		panic(fmt.Sprintf("NewItem was not passed an absolute path. The path must start with the RootDir (%s). Failing path: %s", config.GetConfig().RootDir, fullPath))
+	}
+}

src/globals/globals.go

@@ -0,0 +1,14 @@
+package globals
+
+import (
+	"crazyfs/Walk"
+)
+
+var ElasticCrawlers *DcWorkers
+
+var DirectoryCrawlers *DcWorkers
+
+type DcWorkers struct {
+	Queue       *Walk.JobQueue
+	BusyWorkers int32
+}

src/go.mod

@@ -6,6 +6,7 @@ require (
 	github.com/chai2010/webp v1.1.1
 	github.com/disintegration/imaging v1.6.2
 	github.com/elastic/go-elasticsearch/v8 v8.11.1
+	github.com/enriquebris/goconcurrentqueue v0.7.0
 	github.com/gabriel-vasile/mimetype v1.4.2
 	github.com/gorilla/mux v1.8.0
 	github.com/hashicorp/golang-lru/v2 v2.0.4

src/go.sum

@@ -57,6 +57,8 @@ github.com/elastic/elastic-transport-go/v8 v8.3.0 h1:DJGxovyQLXGr62e9nDMPSxRyWIO
 github.com/elastic/elastic-transport-go/v8 v8.3.0/go.mod h1:87Tcz8IVNe6rVSLdBux1o/PEItLtyabHU3naC7IoqKI=
 github.com/elastic/go-elasticsearch/v8 v8.11.1 h1:1VgTgUTbpqQZ4uE+cPjkOvy/8aw1ZvKcU0ZUE5Cn1mc=
 github.com/elastic/go-elasticsearch/v8 v8.11.1/go.mod h1:GU1BJHO7WeamP7UhuElYwzzHtvf9SDmeVpSSy9+o6Qg=
+github.com/enriquebris/goconcurrentqueue v0.7.0 h1:JYrDa45N3xo3Sr9mjvlRaWiBHvBEJIhAdLXO3VGVghA=
+github.com/enriquebris/goconcurrentqueue v0.7.0/go.mod h1:OZ+KC2BcRYzjg0vgoUs1GFqdAjkD9mz2Ots7Jbm1yS4=
 github.com/envoyproxy/go-control-plane v0.9.0/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
 github.com/envoyproxy/go-control-plane v0.9.1-0.20191026205805-5f8ba28d4473/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
 github.com/envoyproxy/go-control-plane v0.9.4/go.mod h1:6rpuAdCZL397s3pYoYcLgu1mIlRU8Am5FuJP05cCM98=