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Third try at concurrency

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carbotaniuman 2020-08-11 14:42:00 -05:00
parent 89d9a9386f
commit c64ae4e339
1 changed files with 15 additions and 3 deletions
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18
src/main/kotlin/mdnet/base/MangaDexClient.kt
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@ -28,7 +28,9 @@ import com.fasterxml.jackson.module.kotlin.readValue
import java.io.File import java.io.File
import java.io.FileReader import java.io.FileReader
import java.io.IOException import java.io.IOException
import java.util.concurrent.CountDownLatch
import java.util.concurrent.Executors import java.util.concurrent.Executors
import java.util.concurrent.ScheduledFuture
import java.util.concurrent.TimeUnit import java.util.concurrent.TimeUnit
import java.util.regex.Pattern import java.util.regex.Pattern
import mdnet.base.Main.dieWithError import mdnet.base.Main.dieWithError
@ -46,6 +48,7 @@ class ClientSettingsException(message: String) : Exception(message)
class MangaDexClient(private val settingsFile: File, databaseFile: File, cacheFolder: File) { class MangaDexClient(private val settingsFile: File, databaseFile: File, cacheFolder: File) {
// this must remain single-threaded because of how the state mechanism works // this must remain single-threaded because of how the state mechanism works
private val executor = Executors.newSingleThreadScheduledExecutor() private val executor = Executors.newSingleThreadScheduledExecutor()
private lateinit var scheduledFuture: ScheduledFuture<*>
private val database: Database private val database: Database
private val cache: DiskLruCache private val cache: DiskLruCache
@ -89,7 +92,7 @@ class MangaDexClient(private val settingsFile: File, databaseFile: File, cacheFo
fun runLoop() { fun runLoop() {
LOGGER.info { "Mangadex@Home Client initialized - starting normal operation." } LOGGER.info { "Mangadex@Home Client initialized - starting normal operation." }
executor.scheduleWithFixedDelay({ scheduledFuture = executor.scheduleWithFixedDelay({
try { try {
// this blocks the executor, so no worries about concurrency // this blocks the executor, so no worries about concurrency
reloadClientSettings() reloadClientSettings()
@ -145,22 +148,31 @@ class MangaDexClient(private val settingsFile: File, databaseFile: File, cacheFo
} }
fun shutdown() { fun shutdown() {
executor.schedule({
LOGGER.info { "Mangadex@Home Client shutting down" } LOGGER.info { "Mangadex@Home Client shutting down" }
val latch = CountDownLatch(1)
scheduledFuture.cancel(false)
executor.schedule({
if (webUi != null) { if (webUi != null) {
stopWebUi() stopWebUi()
} }
if (imageServer != null) { if (imageServer != null) {
stopImageServer() stopImageServer()
} }
LOGGER.info { "Mangadex@Home Client has shut down" }
try { try {
cache.close() cache.close()
} catch (e: IOException) { } catch (e: IOException) {
LOGGER.error(e) { "Cache failed to close" } LOGGER.error(e) { "Cache failed to close" }
} }
latch.countDown()
}, 0, TimeUnit.SECONDS) }, 0, TimeUnit.SECONDS)
latch.await()
executor.shutdown()
LOGGER.info { "Mangadex@Home Client has shut down" }
} }
/** /**