use singleton annotation instead of binding as singleton

build.gradle

@@ -176,7 +176,7 @@ configure(project(':common')) {
         compile "ch.qos.logback:logback-classic:$logbackVersion"
         compile 'com.google.code.findbugs:jsr305:3.0.2'
         compile 'com.google.guava:guava:20.0'
-        compile('com.google.inject:guice:4.1.0') {
+        compile('com.google.inject:guice:4.2.2') {
             exclude(module: 'guava')
         }
         compile("com.github.bisq-network.bitcoinj:bitcoinj-core:$bitcoinjVersion") {

core/src/main/java/bisq/core/util/BSFormatter.java

@@ -38,6 +38,7 @@
 import org.bitcoinj.utils.MonetaryFormat;
 
 import javax.inject.Inject;
+import javax.inject.Singleton;
 
 import org.apache.commons.lang3.StringUtils;
 import org.apache.commons.lang3.time.DateUtils;
@@ -59,6 +60,7 @@
 import org.jetbrains.annotations.NotNull;
 
 @Slf4j
+@Singleton
 public class BSFormatter {
     public final static String RANGE_SEPARATOR = " - ";
 

core/src/main/java/bisq/core/util/BsqFormatter.java

@@ -35,6 +35,7 @@
 import org.bitcoinj.utils.MonetaryFormat;
 
 import javax.inject.Inject;
+import javax.inject.Singleton;
 
 import java.text.DecimalFormat;
 import java.text.NumberFormat;
@@ -44,6 +45,7 @@
 import lombok.extern.slf4j.Slf4j;
 
 @Slf4j
+@Singleton
 public class BsqFormatter extends BSFormatter {
     @SuppressWarnings("PointlessBooleanExpression")
     private static final boolean useBsqAddressFormat = true || !DevEnv.isDevMode();

desktop/src/main/java/bisq/desktop/DesktopModule.java

@@ -18,26 +18,12 @@
 package bisq.desktop;
 
 import bisq.desktop.common.fxml.FxmlViewLoader;
-import bisq.desktop.common.view.CachingViewLoader;
 import bisq.desktop.common.view.ViewFactory;
 import bisq.desktop.common.view.ViewLoader;
 import bisq.desktop.common.view.guice.InjectorViewFactory;
-import bisq.desktop.main.dao.bonding.BondingViewUtils;
-import bisq.desktop.main.funds.transactions.DisplayedTransactionsFactory;
-import bisq.desktop.main.funds.transactions.TradableRepository;
-import bisq.desktop.main.funds.transactions.TransactionAwareTradableFactory;
-import bisq.desktop.main.funds.transactions.TransactionListItemFactory;
-import bisq.desktop.main.offer.offerbook.OfferBook;
-import bisq.desktop.main.overlays.notifications.NotificationCenter;
-import bisq.desktop.main.overlays.windows.TorNetworkSettingsWindow;
-import bisq.desktop.main.presentation.DaoPresentation;
-import bisq.desktop.main.presentation.MarketPricePresentation;
-import bisq.desktop.util.Transitions;
 
 import bisq.core.app.AppOptionKeys;
 import bisq.core.locale.Res;
-import bisq.core.util.BSFormatter;
-import bisq.core.util.BsqFormatter;
 
 import bisq.common.app.AppModule;
 
@@ -57,32 +43,10 @@ public DesktopModule(Environment environment) {
 
     @Override
     protected void configure() {
-        bind(InjectorViewFactory.class).in(Singleton.class);
         bind(ViewFactory.class).to(InjectorViewFactory.class);
-        bind(CachingViewLoader.class).in(Singleton.class);
 
         bind(ResourceBundle.class).toInstance(Res.getResourceBundle());
         bind(ViewLoader.class).to(FxmlViewLoader.class).in(Singleton.class);
-        bind(CachingViewLoader.class).in(Singleton.class);
-
-        bind(Navigation.class).in(Singleton.class);
-        bind(NotificationCenter.class).in(Singleton.class);
-
-        bind(OfferBook.class).in(Singleton.class);
-        bind(BSFormatter.class).in(Singleton.class);
-        bind(BsqFormatter.class).in(Singleton.class);
-        bind(TorNetworkSettingsWindow.class).in(Singleton.class);
-        bind(MarketPricePresentation.class).in(Singleton.class);
-        bind(DaoPresentation.class).in(Singleton.class);
-
-        bind(Transitions.class).in(Singleton.class);
-
-        bind(TradableRepository.class).in(Singleton.class);
-        bind(TransactionListItemFactory.class).in(Singleton.class);
-        bind(TransactionAwareTradableFactory.class).in(Singleton.class);
-        bind(DisplayedTransactionsFactory.class).in(Singleton.class);
-
-        bind(BondingViewUtils.class).in(Singleton.class);
 
         bindConstant().annotatedWith(Names.named(AppOptionKeys.APP_NAME_KEY)).to(environment.getRequiredProperty(AppOptionKeys.APP_NAME_KEY));
     }

desktop/src/main/java/bisq/desktop/Navigation.java

@@ -28,6 +28,8 @@
 
 import com.google.inject.Inject;
 
+import javax.inject.Singleton;
+
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Objects;
@@ -41,6 +43,7 @@
 import javax.annotation.Nullable;
 
 @Slf4j
+@Singleton
 public final class Navigation implements PersistedDataHost {
     private static final ViewPath DEFAULT_VIEW_PATH = ViewPath.to(MainView.class, MarketView.class);
 

desktop/src/main/java/bisq/desktop/common/fxml/FxmlViewLoader.java

@@ -26,6 +26,7 @@
 import org.springframework.core.annotation.AnnotationUtils;
 
 import javax.inject.Inject;
+import javax.inject.Singleton;
 
 import javafx.fxml.FXMLLoader;
 
@@ -38,6 +39,7 @@
 import static com.google.common.base.Preconditions.checkNotNull;
 import static org.springframework.core.annotation.AnnotationUtils.getDefaultValue;
 
+@Singleton
 public class FxmlViewLoader implements ViewLoader {
 
     private final ViewFactory viewFactory;

desktop/src/main/java/bisq/desktop/common/view/CachingViewLoader.java

@@ -18,9 +18,11 @@
 package bisq.desktop.common.view;
 
 import javax.inject.Inject;
+import javax.inject.Singleton;
 
 import java.util.HashMap;
 
+@Singleton
 public class CachingViewLoader implements ViewLoader {
 
     private final HashMap<Object, View> cache = new HashMap<>();

desktop/src/main/java/bisq/desktop/common/view/guice/InjectorViewFactory.java

@@ -21,8 +21,11 @@
 
 import com.google.inject.Injector;
 
+import javax.inject.Singleton;
+
 import com.google.common.base.Preconditions;
 
+@Singleton
 public class InjectorViewFactory implements ViewFactory {
 
     private Injector injector;

desktop/src/main/java/bisq/desktop/main/dao/bonding/BondingViewUtils.java

@@ -47,6 +47,7 @@
 import org.bitcoinj.core.InsufficientMoneyException;
 
 import javax.inject.Inject;
+import javax.inject.Singleton;
 
 import java.util.Optional;
 import java.util.function.Consumer;
@@ -56,6 +57,7 @@
 import static com.google.common.base.Preconditions.checkArgument;
 
 @Slf4j
+@Singleton
 public class BondingViewUtils {
     private final P2PService p2PService;
     private final MyReputationListService myReputationListService;

desktop/src/main/java/bisq/desktop/main/funds/transactions/DisplayedTransactionsFactory.java

@@ -20,7 +20,9 @@
 import bisq.core.btc.wallet.BtcWalletService;
 
 import javax.inject.Inject;
+import javax.inject.Singleton;
 
+@Singleton
 public class DisplayedTransactionsFactory {
     private final BtcWalletService btcWalletService;
     private final TradableRepository tradableRepository;

desktop/src/main/java/bisq/desktop/main/funds/transactions/TradableRepository.java

@@ -24,11 +24,13 @@
 import bisq.core.trade.failed.FailedTradesManager;
 
 import javax.inject.Inject;
+import javax.inject.Singleton;
 
 import com.google.common.collect.ImmutableSet;
 
 import java.util.Set;
 
+@Singleton
 public class TradableRepository {
     private final OpenOfferManager openOfferManager;
     private final TradeManager tradeManager;

desktop/src/main/java/bisq/desktop/main/funds/transactions/TransactionAwareTradableFactory.java

@@ -23,7 +23,9 @@
 import bisq.core.trade.Trade;
 
 import javax.inject.Inject;
+import javax.inject.Singleton;
 
+@Singleton
 public class TransactionAwareTradableFactory {
     private final DisputeManager disputeManager;
 

desktop/src/main/java/bisq/desktop/main/funds/transactions/TransactionListItemFactory.java

@@ -27,11 +27,13 @@
 import org.bitcoinj.core.Transaction;
 
 import javax.inject.Inject;
+import javax.inject.Singleton;
 
 import java.util.Optional;
 
 import javax.annotation.Nullable;
 
+@Singleton
 public class TransactionListItemFactory {
     private final BtcWalletService btcWalletService;
     private final BsqWalletService bsqWalletService;

desktop/src/main/java/bisq/desktop/main/offer/offerbook/OfferBook.java

@@ -22,6 +22,7 @@
 import bisq.core.trade.TradeManager;
 
 import javax.inject.Inject;
+import javax.inject.Singleton;
 
 import javafx.collections.FXCollections;
 import javafx.collections.ObservableList;
@@ -42,6 +43,7 @@
  * It also use OfferRepository.Listener as the lists items class and we don't want to get any dependency out of the
  * package for that.
  */
+@Singleton
 @Slf4j
 public class OfferBook {
     private final OfferBookService offerBookService;

desktop/src/main/java/bisq/desktop/main/overlays/Overlay.java

@@ -173,7 +173,7 @@ protected enum Type {
     private HPos buttonAlignment = HPos.RIGHT;
 
     protected Optional<Runnable> closeHandlerOptional = Optional.<Runnable>empty();
-    protected Optional<Runnable> actionHandlerOptional = Optional.<Runnable>empty();
+    protected Optional<Runnable> actionHandlerOptional = Optional.empty();
     protected Optional<Runnable> secondaryActionHandlerOptional = Optional.<Runnable>empty();
     protected ChangeListener<Number> positionListener;
 
@@ -438,7 +438,7 @@ public T secondaryActionButtonText(String secondaryActionButtonText) {
 
     public T useShutDownButton() {
         this.actionButtonText = Res.get("shared.shutDown");
-        this.actionHandlerOptional = Optional.of(BisqApp.getShutDownHandler());
+        this.actionHandlerOptional = Optional.ofNullable(BisqApp.getShutDownHandler());
         //noinspection unchecked
         return (T) this;
     }

desktop/src/main/java/bisq/desktop/main/overlays/notifications/NotificationCenter.java

@@ -38,6 +38,8 @@
 
 import com.google.inject.Inject;
 
+import javax.inject.Singleton;
+
 import org.fxmisc.easybind.EasyBind;
 import org.fxmisc.easybind.Subscription;
 
@@ -54,6 +56,7 @@
 import javax.annotation.Nullable;
 
 @Slf4j
+@Singleton
 public class NotificationCenter {
 
     ///////////////////////////////////////////////////////////////////////////////////////////

desktop/src/main/java/bisq/desktop/main/overlays/windows/TorNetworkSettingsWindow.java

@@ -38,6 +38,7 @@
 import bisq.common.util.Utilities;
 
 import javax.inject.Inject;
+import javax.inject.Singleton;
 
 import javafx.scene.Scene;
 import javafx.scene.control.Button;
@@ -72,6 +73,7 @@
 import static bisq.desktop.util.FormBuilder.*;
 
 @Slf4j
+@Singleton
 public class TorNetworkSettingsWindow extends Overlay<TorNetworkSettingsWindow> {
 
     public enum BridgeOption {

desktop/src/main/java/bisq/desktop/main/presentation/DaoPresentation.java

@@ -12,6 +12,7 @@
 import bisq.common.app.DevEnv;
 
 import javax.inject.Inject;
+import javax.inject.Singleton;
 
 import javafx.beans.property.BooleanProperty;
 import javafx.beans.property.DoubleProperty;
@@ -25,6 +26,7 @@
 
 import lombok.Getter;
 
+@Singleton
 public class DaoPresentation implements DaoStateListener {
 
     public static final String DAO_NEWS = "daoNewsVersion1.0.0";

desktop/src/main/java/bisq/desktop/main/presentation/MarketPricePresentation.java

@@ -35,6 +35,7 @@
 import bisq.common.UserThread;
 
 import javax.inject.Inject;
+import javax.inject.Singleton;
 
 import org.fxmisc.easybind.EasyBind;
 import org.fxmisc.easybind.Subscription;
@@ -60,6 +61,7 @@
 
 import lombok.Getter;
 
+@Singleton
 public class MarketPricePresentation {
     private final Preferences preferences;
     private final BSFormatter formatter;

desktop/src/main/java/bisq/desktop/util/Transitions.java

@@ -22,6 +22,7 @@
 import bisq.common.UserThread;
 
 import javax.inject.Inject;
+import javax.inject.Singleton;
 
 import javafx.animation.FadeTransition;
 import javafx.animation.Interpolator;
@@ -39,6 +40,7 @@
 
 import javafx.util.Duration;
 
+@Singleton
 public class Transitions {
 
     public final static int DEFAULT_DURATION = 600;