优化下载

app/src/main/java/io/legado/app/model/CacheBook.kt

@@ -17,7 +17,6 @@ import kotlinx.coroutines.CoroutineScope
 import java.text.SimpleDateFormat
 import java.util.*
 import java.util.concurrent.ConcurrentHashMap
-import java.util.concurrent.CopyOnWriteArraySet
 import kotlin.coroutines.CoroutineContext
 
 class CacheBook(val bookSource: BookSource, val book: Book) {
@@ -117,22 +116,40 @@ class CacheBook(val bookSource: BookSource, val book: Book) {
 
     }
 
-    val waitDownloadSet = CopyOnWriteArraySet<Int>()
-    val onDownloadSet = CopyOnWriteArraySet<Int>()
-    val successDownloadSet = CopyOnWriteArraySet<Int>()
+    val waitDownloadSet = hashSetOf<Int>()
+    val onDownloadSet = hashSetOf<Int>()
+    val successDownloadSet = hashSetOf<Int>()
 
     fun addDownload(start: Int, end: Int) {
+        synchronized(this) {
             for (i in start..end) {
                 waitDownloadSet.add(i)
             }
         }
+    }
 
     fun isRun(): Boolean {
-        return waitDownloadSet.size > 0 || onDownloadSet.size > 0
+        return synchronized(this) {
+            waitDownloadSet.size > 0 || onDownloadSet.size > 0
+        }
+    }
+
+    private fun onSuccess(index: Int) {
+        synchronized(this) {
+            onDownloadSet.remove(index)
+            successDownloadSet.add(index)
+        }
+    }
+
+    private fun onErrorOrCancel(index: Int) {
+        synchronized(this) {
+            onDownloadSet.remove(index)
+            waitDownloadSet.add(index)
+        }
     }
 
-    @Synchronized
     fun download(scope: CoroutineScope, context: CoroutineContext): Boolean {
+        synchronized(this) {
             val chapterIndex = waitDownloadSet.firstOrNull() ?: return false
             if (onDownloadSet.contains(chapterIndex)) {
                 waitDownloadSet.remove(chapterIndex)
@@ -155,19 +172,16 @@ class CacheBook(val bookSource: BookSource, val book: Book) {
                 chapter,
                 context = context
             ).onSuccess { content ->
-            onDownloadSet.remove(chapterIndex)
-            successDownloadSet.add(chapterIndex)
+                onSuccess(chapterIndex)
                 addLog("${book.name}-${chapter.title} getContentSuccess")
                 downloadFinish(chapter, content.ifBlank { "No content" })
             }.onError {
-            onDownloadSet.remove(chapterIndex)
-            waitDownloadSet.add(chapterIndex)
+                onErrorOrCancel(chapterIndex)
                 print(it.localizedMessage)
                 addLog("${book.name}-${chapter.title} getContentError${it.localizedMessage}")
                 downloadFinish(chapter, it.localizedMessage ?: "download error")
             }.onCancel {
-            onDownloadSet.remove(chapterIndex)
-            waitDownloadSet.add(chapterIndex)
+                onErrorOrCancel(chapterIndex)
             }.onFinally {
                 if (waitDownloadSet.isEmpty() && onDownloadSet.isEmpty()) {
                     postEvent(EventBus.UP_DOWNLOAD, "")
@@ -175,6 +189,7 @@ class CacheBook(val bookSource: BookSource, val book: Book) {
             }
             return true
         }
+    }
 
     @Synchronized
     fun download(
@@ -182,6 +197,7 @@ class CacheBook(val bookSource: BookSource, val book: Book) {
         chapter: BookChapter,
         resetPageOffset: Boolean = false
     ) {
+        synchronized(this) {
             if (onDownloadSet.contains(chapter.index)) {
                 return
             }
@@ -190,12 +206,19 @@ class CacheBook(val bookSource: BookSource, val book: Book) {
                 .onSuccess { content ->
                     downloadFinish(chapter, content.ifBlank { "No content" }, resetPageOffset)
                 }.onError {
-                downloadFinish(chapter, it.localizedMessage ?: "download error", resetPageOffset)
+                    downloadFinish(
+                        chapter,
+                        it.localizedMessage ?: "download error",
+                        resetPageOffset
+                    )
                 }.onFinally {
+                    synchronized(this) {
                         onDownloadSet.remove(chapter.index)
+                    }
                     ReadBook.removeLoading(chapter.index)
                 }
         }
+    }
 
     private fun downloadFinish(
         chapter: BookChapter,

app/src/main/java/io/legado/app/service/CacheBookService.kt

@@ -92,7 +92,7 @@ class CacheBookService : BaseService() {
             while (isActive) {
                 CacheBook.cacheBookMap.forEach {
                     while (CacheBook.onDownloadCount > threadCount) {
-                        delay(50)
+                        delay(100)
                     }
                     it.value.download(this, cachePool)
                 }