Add caching to adapter lookup

If we request an adapter with the same settings multiple times, we will
now return the same instance.

app/src/main/java/org/transdroid/core/app/settings/ServerSetting.java

@@ -18,10 +18,10 @@ package org.transdroid.core.app.settings;
 
 import android.content.Context;
 import android.text.TextUtils;
-
 import org.transdroid.core.gui.lists.SimpleListItem;
 import org.transdroid.core.gui.log.Log_;
 import org.transdroid.daemon.Daemon;
+import org.transdroid.daemon.DaemonFactory;
 import org.transdroid.daemon.DaemonSettings;
 import org.transdroid.daemon.IDaemonAdapter;
 import org.transdroid.daemon.OS;
@@ -308,8 +308,8 @@ public class ServerSetting implements SimpleListItem {
      * @param context            A context to access the logger
      * @return An IDaemonAdapter instance of the specific torrent client daemon type
      */
-    public IDaemonAdapter createServerAdapter(String connectedToNetwork, Context context) {
-        return type.createAdapter(convertToDaemonSettings(connectedToNetwork, context));
+    public IDaemonAdapter getServerAdapter(String connectedToNetwork, Context context) {
+        return DaemonFactory.getServerAdapter(convertToDaemonSettings(connectedToNetwork, context));
     }
 
     /**

app/src/main/java/org/transdroid/core/gui/DetailsActivity.java

@@ -20,13 +20,10 @@ import android.annotation.TargetApi;
 import android.content.Intent;
 import android.os.Build;
 import android.os.Bundle;
-
 import androidx.appcompat.app.AppCompatActivity;
 import androidx.appcompat.widget.Toolbar;
-
 import com.nispok.snackbar.Snackbar;
 import com.nispok.snackbar.SnackbarManager;
-
 import org.androidannotations.annotations.AfterViews;
 import org.androidannotations.annotations.Background;
 import org.androidannotations.annotations.Bean;
@@ -136,7 +133,7 @@ public class DetailsActivity extends AppCompatActivity implements TorrentTasksEx
         // Connect to the last used server
         ServerSetting lastUsed = applicationSettings.getLastUsedServer();
         fragmentDetails.setCurrentServerSettings(lastUsed);
-        currentConnection = lastUsed.createServerAdapter(connectivityHelper.getConnectedNetworkName(), this);
+        currentConnection = lastUsed.getServerAdapter(connectivityHelper.getConnectedNetworkName(), this);
 
         // Show details and load fine stats and torrent files
         fragmentDetails.updateTorrent(torrent);

app/src/main/java/org/transdroid/core/gui/TorrentsActivity.java

@@ -31,7 +31,6 @@ import android.view.ViewGroup;
 import android.widget.AdapterView;
 import android.widget.AdapterView.OnItemClickListener;
 import android.widget.ListView;
-
 import androidx.annotation.NonNull;
 import androidx.appcompat.app.ActionBarDrawerToggle;
 import androidx.appcompat.app.AppCompatActivity;
@@ -39,13 +38,11 @@ import androidx.appcompat.widget.ActionMenuView;
 import androidx.appcompat.widget.SearchView;
 import androidx.appcompat.widget.Toolbar;
 import androidx.drawerlayout.widget.DrawerLayout;
-
 import com.getbase.floatingactionbutton.FloatingActionButton;
 import com.getbase.floatingactionbutton.FloatingActionsMenu;
 import com.nispok.snackbar.Snackbar;
 import com.nispok.snackbar.SnackbarManager;
 import com.nispok.snackbar.enums.SnackbarType;
-
 import org.androidannotations.annotations.AfterViews;
 import org.androidannotations.annotations.Background;
 import org.androidannotations.annotations.Bean;
@@ -337,7 +334,7 @@ public class TorrentsActivity extends AppCompatActivity implements TorrentTasksE
         } else {
             // Resume after instead of fully loading the torrents list; create connection and set action bar title
             ServerSetting lastUsed = applicationSettings.getLastUsedServer();
-            currentConnection = lastUsed.createServerAdapter(connectivityHelper.getConnectedNetworkName(), this);
+            currentConnection = lastUsed.getServerAdapter(connectivityHelper.getConnectedNetworkName(), this);
             serverSelectionView.updateCurrentServer(currentConnection);
             serverSelectionView.updateCurrentFilter(currentFilter);
         }
@@ -380,7 +377,7 @@ public class TorrentsActivity extends AppCompatActivity implements TorrentTasksE
         if (currentConnection == null) {
             filterSelected(lastUsed, true);
         } else {
-            currentConnection = lastUsed.createServerAdapter(connectivityHelper.getConnectedNetworkName(), this);
+            currentConnection = lastUsed.getServerAdapter(connectivityHelper.getConnectedNetworkName(), this);
         }
 
         // Start auto refresh
@@ -564,7 +561,7 @@ public class TorrentsActivity extends AppCompatActivity implements TorrentTasksE
             }
 
             // Update connection to the newly selected server and refresh
-            currentConnection = server.createServerAdapter(connectivityHelper.getConnectedNetworkName(), this);
+            currentConnection = server.getServerAdapter(connectivityHelper.getConnectedNetworkName(), this);
             applicationSettings.setLastUsedServer(server);
             serverSelectionView.updateCurrentServer(currentConnection);
             if (forceNewConnection) {

app/src/main/java/org/transdroid/core/gui/rss/RssFeedsActivity.java

@@ -25,19 +25,16 @@ import android.os.Parcel;
 import android.text.TextUtils;
 import android.view.View;
 import android.view.ViewGroup;
-
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 import androidx.appcompat.app.AppCompatActivity;
 import androidx.appcompat.widget.Toolbar;
 import androidx.viewpager.widget.PagerAdapter;
 import androidx.viewpager.widget.ViewPager;
-
 import com.google.android.material.tabs.TabLayout;
 import com.nispok.snackbar.Snackbar;
 import com.nispok.snackbar.SnackbarManager;
 import com.nispok.snackbar.enums.SnackbarType;
-
 import org.androidannotations.annotations.AfterViews;
 import org.androidannotations.annotations.Background;
 import org.androidannotations.annotations.Bean;
@@ -269,7 +266,7 @@ public class RssFeedsActivity extends AppCompatActivity {
 
     protected IDaemonAdapter getCurrentConnection() {
         ServerSetting lastUsed = applicationSettings.getLastUsedServer();
-        return lastUsed.createServerAdapter(connectivityHelper.getConnectedNetworkName(), this);
+        return lastUsed.getServerAdapter(connectivityHelper.getConnectedNetworkName(), this);
     }
 
     // @Background

app/src/main/java/org/transdroid/core/service/ControlService.java

@@ -3,7 +3,6 @@ package org.transdroid.core.service;
 import android.app.IntentService;
 import android.appwidget.AppWidgetManager;
 import android.content.Intent;
-
 import org.androidannotations.annotations.Bean;
 import org.androidannotations.annotations.EService;
 import org.transdroid.core.app.settings.ApplicationSettings;
@@ -100,7 +99,7 @@ public class ControlService extends IntentService {
         }
 
         // See which action should be performed on the server
-        IDaemonAdapter adapter = server.createServerAdapter(connectivityHelper.getConnectedNetworkName(), this);
+        IDaemonAdapter adapter = server.getServerAdapter(connectivityHelper.getConnectedNetworkName(), this);
         DaemonTask task = null;
         switch (intent.getAction()) {
             case INTENT_RESUMEALL:

app/src/main/java/org/transdroid/core/service/ServerCheckerJobRunner.java

@@ -21,11 +21,8 @@ import android.app.PendingIntent;
 import android.content.Context;
 import android.content.Intent;
 import android.text.TextUtils;
-
 import androidx.core.app.NotificationCompat;
-
 import com.evernote.android.job.Job;
-
 import org.androidannotations.annotations.Bean;
 import org.androidannotations.annotations.EBean;
 import org.androidannotations.annotations.RootContext;
@@ -85,7 +82,7 @@ public class ServerCheckerJobRunner {
             JSONArray lastStats = applicationSettings.getServerLastStats(server);
 
             // Synchronously retrieve torrents listing
-            IDaemonAdapter adapter = server.createServerAdapter(connectivityHelper.getConnectedNetworkName(), context);
+            IDaemonAdapter adapter = server.getServerAdapter(connectivityHelper.getConnectedNetworkName(), context);
             DaemonTaskResult result = RetrieveTask.create(adapter).execute(log);
             if (!(result instanceof RetrieveTaskSuccessResult)) {
                 // Cannot retrieve torrents at this time

app/src/main/java/org/transdroid/core/widget/ListWidgetConfigActivity.java

@@ -30,10 +30,8 @@ import android.widget.CompoundButton.OnCheckedChangeListener;
 import android.widget.ListView;
 import android.widget.Spinner;
 import android.widget.TextView;
-
 import androidx.appcompat.app.ActionBar;
 import androidx.appcompat.app.AppCompatActivity;
-
 import org.androidannotations.annotations.AfterViews;
 import org.androidannotations.annotations.Background;
 import org.androidannotations.annotations.Bean;
@@ -209,7 +207,7 @@ public class ListWidgetConfigActivity extends AppCompatActivity {
 
         // Create a connection object and retrieve the live torrents
         IDaemonAdapter connection =
-                ((ServerSetting) serverSpinner.getSelectedItem()).createServerAdapter(connectivityHelper.getConnectedNetworkName(), this);
+                ((ServerSetting) serverSpinner.getSelectedItem()).getServerAdapter(connectivityHelper.getConnectedNetworkName(), this);
         DaemonTaskResult result = RetrieveTask.create(connection).execute(log);
         if (result instanceof RetrieveTaskSuccessResult) {
             // Success; show the active torrents in the widget preview

app/src/main/java/org/transdroid/core/widget/ListWidgetViewsService.java

@@ -24,7 +24,6 @@ import android.os.Build;
 import android.view.View;
 import android.widget.RemoteViews;
 import android.widget.RemoteViewsService;
-
 import org.androidannotations.annotations.EService;
 import org.transdroid.R;
 import org.transdroid.core.app.settings.ApplicationSettings;
@@ -109,7 +108,7 @@ class WidgetViewsFactory implements RemoteViewsService.RemoteViewsFactory {
 
         // Load the torrents; synchronously
         IDaemonAdapter connection =
-                server.createServerAdapter(ConnectivityHelper_.getInstance_(context).getConnectedNetworkName(),
+                server.getServerAdapter(ConnectivityHelper_.getInstance_(context).getConnectedNetworkName(),
                         context);
         DaemonTaskResult result = RetrieveTask.create(connection).execute(log);
         if (!(result instanceof RetrieveTaskSuccessResult)) {

app/src/main/java/org/transdroid/daemon/DaemonFactory.java

@@ -0,0 +1,42 @@
+/*
+ *	This file is part of Transdroid <http://www.transdroid.org>
+ *
+ *	Transdroid is free software: you can redistribute it and/or modify
+ *	it under the terms of the GNU General Public License as published by
+ *	the Free Software Foundation, either version 3 of the License, or
+ *	(at your option) any later version.
+ *
+ *	Transdroid is distributed in the hope that it will be useful,
+ *	but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *	GNU General Public License for more details.
+ *
+ *	You should have received a copy of the GNU General Public License
+ *	along with Transdroid.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+package org.transdroid.daemon;
+
+import java.util.HashMap;
+import java.util.Map;
+
+public class DaemonFactory {
+
+    private static final Map<String, IDaemonAdapter> adapterMap = new HashMap<>();
+    private static final Map<String, DaemonSettings> settingsMap = new HashMap<>();
+
+    public static synchronized IDaemonAdapter getServerAdapter(DaemonSettings daemonSettings) {
+
+        String idString = daemonSettings.getIdString();
+        IDaemonAdapter daemonAdapter = adapterMap.get(idString);
+
+        //If there is no adapter or the settings have changed, generate a new instance
+        if(daemonAdapter == null || !daemonSettings.equals(settingsMap.get(idString))) {
+            daemonAdapter = daemonSettings.getType().createAdapter(daemonSettings);
+            adapterMap.put(idString, daemonAdapter);
+            settingsMap.put(idString, daemonSettings);
+        }
+
+        return daemonAdapter;
+    }
+}

app/src/main/java/org/transdroid/daemon/DaemonSettings.java

@@ -189,6 +189,64 @@ public final class DaemonSettings {
         return isAutoGenerated;
     }
 
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+
+        DaemonSettings that = (DaemonSettings) o;
+
+        if (port != that.port) return false;
+        if (ssl != that.ssl) return false;
+        if (sslTrustAll != that.sslTrustAll) return false;
+        if (useAuthentication != that.useAuthentication) return false;
+        if (timeout != that.timeout) return false;
+        if (alarmOnFinishedDownload != that.alarmOnFinishedDownload) return false;
+        if (alarmOnNewTorrent != that.alarmOnNewTorrent) return false;
+        if (isAutoGenerated != that.isAutoGenerated) return false;
+        if (name != null ? !name.equals(that.name) : that.name != null) return false;
+        if (type != that.type) return false;
+        if (address != null ? !address.equals(that.address) : that.address != null) return false;
+        if (sslTrustKey != null ? !sslTrustKey.equals(that.sslTrustKey) : that.sslTrustKey != null) return false;
+        if (folder != null ? !folder.equals(that.folder) : that.folder != null) return false;
+        if (username != null ? !username.equals(that.username) : that.username != null) return false;
+        if (password != null ? !password.equals(that.password) : that.password != null) return false;
+        if (extraPass != null ? !extraPass.equals(that.extraPass) : that.extraPass != null) return false;
+        if (authToken != null ? !authToken.equals(that.authToken) : that.authToken != null) return false;
+        if (os != that.os) return false;
+        if (downloadDir != null ? !downloadDir.equals(that.downloadDir) : that.downloadDir != null) return false;
+        if (ftpUrl != null ? !ftpUrl.equals(that.ftpUrl) : that.ftpUrl != null) return false;
+        if (ftpPassword != null ? !ftpPassword.equals(that.ftpPassword) : that.ftpPassword != null) return false;
+        return idString != null ? idString.equals(that.idString) : that.idString == null;
+    }
+
+    @Override
+    public int hashCode() {
+        int result = name != null ? name.hashCode() : 0;
+        result = 31 * result + (type != null ? type.hashCode() : 0);
+        result = 31 * result + (address != null ? address.hashCode() : 0);
+        result = 31 * result + port;
+        result = 31 * result + (ssl ? 1 : 0);
+        result = 31 * result + (sslTrustAll ? 1 : 0);
+        result = 31 * result + (sslTrustKey != null ? sslTrustKey.hashCode() : 0);
+        result = 31 * result + (folder != null ? folder.hashCode() : 0);
+        result = 31 * result + (useAuthentication ? 1 : 0);
+        result = 31 * result + (username != null ? username.hashCode() : 0);
+        result = 31 * result + (password != null ? password.hashCode() : 0);
+        result = 31 * result + (extraPass != null ? extraPass.hashCode() : 0);
+        result = 31 * result + (authToken != null ? authToken.hashCode() : 0);
+        result = 31 * result + (os != null ? os.hashCode() : 0);
+        result = 31 * result + (downloadDir != null ? downloadDir.hashCode() : 0);
+        result = 31 * result + (ftpUrl != null ? ftpUrl.hashCode() : 0);
+        result = 31 * result + (ftpPassword != null ? ftpPassword.hashCode() : 0);
+        result = 31 * result + timeout;
+        result = 31 * result + (alarmOnFinishedDownload ? 1 : 0);
+        result = 31 * result + (alarmOnNewTorrent ? 1 : 0);
+        result = 31 * result + (idString != null ? idString.hashCode() : 0);
+        result = 31 * result + (isAutoGenerated ? 1 : 0);
+        return result;
+    }
+
     /**
      * Builds a text that can be used by a human reader to identify this daemon settings
      *