Remove duplicate shutdown hooks

example/pom.xml

@@ -26,7 +26,7 @@
 			<dependency>
 				<groupId>it.tdlight</groupId>
 				<artifactId>tdlight-java-bom</artifactId>
-				<version>2.7.10.0</version>
+				<version>2.7.10.1</version>
 				<type>pom</type>
 				<scope>import</scope>
 			</dependency>

src/main/java/it/tdlight/client/SimpleTelegramClient.java

@@ -205,18 +205,6 @@ public final class SimpleTelegramClient implements Authenticable {
 		this.authenticationData = authenticationData;
 		createDirectories();
 		client.initialize(this::handleUpdate, this::handleUpdateException, this::handleDefaultException);
-
-		// Handle unexpected shutdown
-		Runtime.getRuntime().addShutdownHook(new Thread(() -> {
-			try {
-				// Send close function
-				this.client.send(new TdApi.Close(), ok -> {}, ex -> {});
-				// Wait until the client has been closed successfully
-				this.waitForExit();
-			} catch (Throwable ignored) {
-				// Ignore errors since we are shutting down everything
-			}
-		}));
 	}
 
 	private void createDirectories() {

src/main/java/it/tdlight/common/internal/InternalClientManager.java

@@ -60,15 +60,7 @@ public final class InternalClientManager implements AutoCloseable {
 			}
 			return val;
 		});
-		if (clientManager.startIfNeeded()) {
-			Runtime.getRuntime().addShutdownHook(new Thread(() -> {
-				try {
-					clientManager.onJVMShutdown();
-				} catch (InterruptedException ex) {
-					logger.error("Failed to close", ex);
-				}
-			}));
-		}
+		clientManager.startIfNeeded();
 		return clientManager;
 	}
 
@@ -159,10 +151,6 @@ public final class InternalClientManager implements AutoCloseable {
 		}
 	}
 
-	private void onJVMShutdown() throws InterruptedException {
-		responseReceiver.onJVMShutdown();
-	}
-
 	private static final class DroppedEvent {
 
 		private final long id;

src/main/java/it/tdlight/common/internal/ResponseReceiver.java

@@ -21,7 +21,6 @@ import java.util.concurrent.atomic.AtomicBoolean;
 
 abstract class ResponseReceiver extends Thread implements AutoCloseable {
 
-	private static final String FLAG_PAUSE_SHUTDOWN_UNTIL_ALL_CLOSED = "it.tdlight.pauseShutdownUntilAllClosed";
 	private static final String FLAG_USE_OPTIMIZED_DISPATCHER = "tdlight.dispatcher.use_optimized_dispatcher";
 	private static final boolean USE_OPTIMIZED_DISPATCHER
 			= Boolean.parseBoolean(System.getProperty(FLAG_USE_OPTIMIZED_DISPATCHER, "true"));
@@ -36,7 +35,6 @@ abstract class ResponseReceiver extends Thread implements AutoCloseable {
 
 	private final AtomicBoolean startCalled = new AtomicBoolean();
 	private final AtomicBoolean closeCalled = new AtomicBoolean();
-	private final AtomicBoolean jvmShutdown = new AtomicBoolean();
 
 	private final EventsHandler eventsHandler;
 	private final int[] clientIds = new int[MAX_EVENTS];
@@ -56,7 +54,7 @@ abstract class ResponseReceiver extends Thread implements AutoCloseable {
 	public ResponseReceiver(EventsHandler eventsHandler) {
 		super("TDLib thread");
 		this.eventsHandler = eventsHandler;
-		this.setDaemon(true);
+		this.setDaemon(false);
 	}
 
 	/**
@@ -82,7 +80,6 @@ abstract class ResponseReceiver extends Thread implements AutoCloseable {
 			boolean interrupted;
 			while (
 					!(interrupted = Thread.interrupted())
-							&& !jvmShutdown.get()
 							&& (!closeCalled.get() || !registeredClients.isEmpty())
 			) {
 				// Timeout is expressed in seconds
@@ -224,13 +221,11 @@ abstract class ResponseReceiver extends Thread implements AutoCloseable {
 				}
 			}
 
-			if (interrupted) {
-				if (!jvmShutdown.get()) {
+			if (interrupted || closeCalled.get()) {
 				for (Integer clientId : this.registeredClients) {
 					eventsHandler.handleClientEvents(clientId, true, clientEventIds, clientEvents, 0, 0);
 				}
 			}
-			}
 		} finally {
 			this.closeWait.countDown();
 		}
@@ -287,14 +282,4 @@ abstract class ResponseReceiver extends Thread implements AutoCloseable {
 			throw new IllegalStateException("Start not called");
 		}
 	}
-
-	public void onJVMShutdown() throws InterruptedException {
-		if (startCalled.get()) {
-			if (this.jvmShutdown.compareAndSet(false, true)) {
-				if (Boolean.parseBoolean(System.getProperty(FLAG_PAUSE_SHUTDOWN_UNTIL_ALL_CLOSED, "true"))) {
-					this.closeWait.await();
-				}
-			}
-		}
-	}
 }