#1 - Change Hostname on logout - fixed RC Cache Crash and RealmConfiguration access same file error

app/src/main/java/chat/rocket/android/fragment/sidebar/SidebarMainFragment.java

@@ -16,7 +16,6 @@ import android.widget.TextView;
 import com.jakewharton.rxbinding2.support.v7.widget.RxSearchView;
 import com.jakewharton.rxbinding2.widget.RxCompoundButton;
 
-import chat.rocket.android.LaunchUtil;
 import io.reactivex.Observable;
 import io.reactivex.android.schedulers.AndroidSchedulers;
 
@@ -268,8 +267,9 @@ public class SidebarMainFragment extends AbstractFragment implements SidebarMain
     rootView.findViewById(R.id.btn_logout).setOnClickListener(view -> {
       presenter.onLogout();
       closeUserActionContainer();
-      //go back to the AddServerActivity
-      LaunchUtil.showAddServerActivity(getContext());
+
+      // destroy Activity on logout to be able to recreate most of the environment
+      this.getActivity().finish();
     });
   }
 

app/src/main/java/chat/rocket/android/service/RocketChatService.java

@@ -10,6 +10,9 @@ import android.support.annotation.Nullable;
 
 import java.util.HashMap;
 import java.util.concurrent.TimeUnit;
+
+import chat.rocket.android.activity.MainActivity;
+import chat.rocket.persistence.realm.RealmStore;
 import hugo.weaving.DebugLog;
 import rx.Observable;
 import rx.Single;
@@ -49,7 +52,6 @@ public class RocketChatService extends Service implements ConnectivityServiceInt
   @Override
   public void onCreate() {
     super.onCreate();
-
     connectivityManager = ConnectivityManager.getInstanceForInternal(getApplicationContext());
     connectivityManager.resetConnectivityStateList();
     webSocketThreads = new HashMap<>();
@@ -81,10 +83,18 @@ public class RocketChatService extends Service implements ConnectivityServiceInt
       RocketChatWebSocketThread thread = webSocketThreads.get(hostname);
       if (thread != null) {
         return thread.terminate()
-                //after disconnection from server, remove RCWebSocket key from HashMap
+            // after disconnection from server
             .doAfterTerminate(() -> {
+              // remove RCWebSocket key from HashMap
               webSocketThreads.remove(hostname);
-                  stopSelf();
+              // remove RealmConfiguration key from HashMap
+              RealmStore.sStore.remove(hostname);
+              // clear "cache" SharedPreference
+              this.getSharedPreferences("cache", 0).edit().clear().apply();
+              // start a fresh new MainActivity
+              Intent intent = new Intent(this, MainActivity.class);
+              intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK | Intent.FLAG_ACTIVITY_NEW_TASK);
+              this.startActivity(intent);
             });
       } else {
         return Observable.timer(1, TimeUnit.SECONDS).toSingle()

persistence-realm/src/main/java/chat/rocket/persistence/realm/Migration.java

@@ -70,4 +70,16 @@ public class Migration implements RealmMigration {
       messageSchema.addField(RealmMessage.EDITED_AT, long.class);
     }
   }
+
+  // hack around to avoid "new different configuration cannot access the same file" error
+  @Override
+  public int hashCode() {
+    return 37;
+  }
+
+  @Override
+  public boolean equals(Object o) {
+    return (o instanceof Migration);
+  }
+  // end hack
 }

persistence-realm/src/main/java/chat/rocket/persistence/realm/RealmStore.java

@@ -16,6 +16,8 @@ public class RealmStore {
         .modules(new RocketChatLibraryModule())
         .migration(new Migration())
         .schemaVersion(5)
+        // Just in case
+        .deleteRealmIfMigrationNeeded()
         .build();
   }