1. fix welcome screen menu for 2021.1

src/main/java/io/zhile/research/intellij/ier/listener/AppActivationListener.java

@@ -6,6 +6,7 @@ import com.intellij.openapi.actionSystem.ActionManager;
 import com.intellij.openapi.actionSystem.AnAction;
 import com.intellij.openapi.application.ApplicationActivationListener;
 import com.intellij.openapi.application.ApplicationManager;
+import com.intellij.openapi.diagnostic.Logger;
 import com.intellij.openapi.wm.IdeFrame;
 import com.intellij.util.messages.MessageBusConnection;
 import io.zhile.research.intellij.ier.common.Resetter;
@@ -15,6 +16,7 @@ import io.zhile.research.intellij.ier.helper.ResetTimeHelper;
 import org.jetbrains.annotations.NotNull;
 
 public class AppActivationListener implements ApplicationActivationListener, Disposable {
+    private static final Logger LOG = Logger.getInstance(AppActivationListener.class);
     private static AppActivationListener instance;
     private static MessageBusConnection connection;
 
@@ -35,8 +37,12 @@ public class AppActivationListener implements ApplicationActivationListener, Dis
             return;
         }
 
-        connection = ApplicationManager.getApplication().getMessageBus().connect();
-        connection.subscribe(ApplicationActivationListener.TOPIC, this);
+        try {
+            connection = ApplicationManager.getApplication().getMessageBus().connect();
+            connection.subscribe(ApplicationActivationListener.TOPIC, this);
+        } catch (Exception e) {
+            LOG.warn("sub app activation failed.");
+        }
     }
 
     public synchronized void stop() {

src/main/java/io/zhile/research/intellij/ier/listener/AppEventListener.java

@@ -3,6 +3,7 @@ package io.zhile.research.intellij.ier.listener;
 import com.intellij.ide.AppLifecycleListener;
 import com.intellij.openapi.Disposable;
 import com.intellij.openapi.application.ApplicationManager;
+import com.intellij.openapi.diagnostic.Logger;
 import com.intellij.openapi.project.Project;
 import com.intellij.openapi.util.Ref;
 import com.intellij.util.messages.MessageBusConnection;
@@ -13,6 +14,7 @@ import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
 public class AppEventListener implements AppLifecycleListener, Disposable {
+    private static final Logger LOG = Logger.getInstance(AppEventListener.class);
     private static AppEventListener instance;
     private static MessageBusConnection connection;
 
@@ -33,8 +35,12 @@ public class AppEventListener implements AppLifecycleListener, Disposable {
             return;
         }
 
-        connection = ApplicationManager.getApplication().getMessageBus().connect();
-        connection.subscribe(AppLifecycleListener.TOPIC, this);
+        try {
+            connection = ApplicationManager.getApplication().getMessageBus().connect();
+            connection.subscribe(AppLifecycleListener.TOPIC, this);
+        } catch (Exception e) {
+            LOG.warn("sub app lifecycle failed.");
+        }
     }
 
     public synchronized void stop() {

src/main/java/io/zhile/research/intellij/ier/listener/AppInitListener.java

@@ -0,0 +1,50 @@
+package io.zhile.research.intellij.ier.listener;
+
+import com.intellij.ide.AppLifecycleListener;
+import com.intellij.openapi.Disposable;
+import com.intellij.openapi.actionSystem.ActionManager;
+import com.intellij.openapi.actionSystem.AnAction;
+import com.intellij.openapi.project.Project;
+import com.intellij.openapi.util.Ref;
+import io.zhile.research.intellij.ier.helper.Constants;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.lang.ref.WeakReference;
+
+public class AppInitListener implements AppLifecycleListener, Disposable {
+    private static final WeakReference<AnAction> ACTION = new WeakReference<>(ActionManager.getInstance().getAction(Constants.RESET_ACTION_ID));
+
+    protected AppInitListener() {
+
+    }
+
+    public void appFrameCreated(String[] commandLineArgs, @NotNull Ref<Boolean> willOpenProject) {
+
+    }
+
+    public void appStarting(@Nullable Project projectFromCommandLine) {
+
+    }
+
+    public void projectFrameClosed() {
+
+    }
+
+    public void projectOpenFailed() {
+
+    }
+
+    public void welcomeScreenDisplayed() {
+
+    }
+
+    public void appClosing() {
+
+    }
+
+    @Override
+    public void dispose() {
+
+    }
+}

src/main/java/io/zhile/research/intellij/ier/listener/BrokenPluginsListener.java

@@ -3,12 +3,14 @@ package io.zhile.research.intellij.ier.listener;
 import com.intellij.openapi.Disposable;
 import com.intellij.openapi.application.ApplicationActivationListener;
 import com.intellij.openapi.application.ApplicationManager;
+import com.intellij.openapi.diagnostic.Logger;
 import com.intellij.openapi.wm.IdeFrame;
 import com.intellij.util.messages.MessageBusConnection;
 import io.zhile.research.intellij.ier.helper.BrokenPlugins;
 import org.jetbrains.annotations.NotNull;
 
 public class BrokenPluginsListener implements ApplicationActivationListener, Disposable {
+    private static final Logger LOG = Logger.getInstance(BrokenPluginsListener.class);
     private static BrokenPluginsListener instance;
     private static MessageBusConnection connection;
 
@@ -29,8 +31,12 @@ public class BrokenPluginsListener implements ApplicationActivationListener, Dis
             return;
         }
 
-        connection = ApplicationManager.getApplication().getMessageBus().connect();
-        connection.subscribe(ApplicationActivationListener.TOPIC, this);
+        try {
+            connection = ApplicationManager.getApplication().getMessageBus().connect();
+            connection.subscribe(ApplicationActivationListener.TOPIC, this);
+        } catch (Exception e) {
+            LOG.warn("sub app activation failed.");
+        }
     }
 
     public synchronized void stop() {

src/main/resources/META-INF/plugin.xml

@@ -26,5 +26,7 @@
     <applicationListeners>
         <listener class="io.zhile.research.intellij.ier.listener.PluginListener"
                   topic="com.intellij.ide.plugins.DynamicPluginListener"/>
+        <listener class="io.zhile.research.intellij.ier.listener.AppInitListener"
+                  topic="com.intellij.ide.AppLifecycleListener"/>
     </applicationListeners>
 </idea-plugin>