Issue 5223 - App is freezing sometimes

adblockplussbrowser/src/org/adblockplus/sbrowser/contentblocker/engine/Engine.java

Index: adblockplussbrowser/src/org/adblockplus/sbrowser/contentblocker/engine/Engine.java
===================================================================
--- a/adblockplussbrowser/src/org/adblockplus/sbrowser/contentblocker/engine/Engine.java
+++ b/adblockplussbrowser/src/org/adblockplus/sbrowser/contentblocker/engine/Engine.java
@@ -38,17 +38,16 @@
 import java.util.Set;
 import java.util.TreeSet;
 import java.util.concurrent.LinkedBlockingQueue;
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.locks.ReentrantLock;
 import java.util.regex.Pattern;
 
 import org.adblockplus.adblockplussbrowser.R;
-import org.adblockplus.sbrowser.contentblocker.MainPreferences;
 
 import android.content.Context;
 import android.content.Intent;
 import android.content.SharedPreferences;
 import android.content.pm.PackageInfo;
 import android.content.pm.PackageManager;
 import android.content.pm.ResolveInfo;
 import android.net.ConnectivityManager;
@@ -107,16 +106,17 @@
   private final ReentrantLock accessLock = new ReentrantLock();
   private DefaultSubscriptions defaultSubscriptions;
   private Subscriptions subscriptions;
   private JSONPrefs jsonPrefs;
   private AppInfo appInfo;
   private LinkedBlockingQueue<EngineEvent> engineEvents = new LinkedBlockingQueue<EngineEvent>();
   private Thread handlerThread;
   private Downloader downloader;
+  private SubscriptionUpdateCallback subscriptionUpdateCallback;
   private final Context serviceContext;
   private boolean wasFirstRun = false;
   private long nextUpdateBroadcast = Long.MAX_VALUE;
 
   private Engine(final Context context)
   {
     this.serviceContext = context;
   }
@@ -184,27 +184,23 @@
     {
       // Should never happen, as checkAAStatusAndProceed() should not be called if the user
       // has no compatible SBrowser installed. Nevertheless we have to handle the Exception.
       Log.d(TAG, "No compatible Samsung Browser found.", e);
       return false;
     }
   }
 
+  public void setSubscriptionUpdateCallback(final SubscriptionUpdateCallback subscriptionUpdateCallback) {
+    this.subscriptionUpdateCallback = subscriptionUpdateCallback;
+  }
+
   public void requestUpdateBroadcast()
   {
-    this.lock();
-    try
-    {
-      this.nextUpdateBroadcast = System.currentTimeMillis() + BROADCAST_COMBINATION_DELAY_MILLIS;
-    }
-    finally
-    {
-      this.unlock();
-    }
+    this.nextUpdateBroadcast = System.currentTimeMillis() + BROADCAST_COMBINATION_DELAY_MILLIS;
   }
 
   private void writeFileAndSendUpdateBroadcast()
   {
     createAndWriteFile();
 
     runOnUiThread(new Runnable()
     {
@@ -251,32 +247,35 @@
       }
       return false;
     }
     return current.isConnected();
   }
 
   public List<SubscriptionInfo> getListedSubscriptions()
   {
-    this.lock();
-    try
-    {
-      return this.subscriptions.getSubscriptions(this);
-    }
-    finally
-    {
-      this.unlock();
-    }
+    return this.subscriptions.getSubscriptions(this);
   }
 
   public void changeSubscriptionState(final String id, final boolean enabled)
   {
+    if (this.subscriptionUpdateCallback != null)
+    {
+      this.subscriptionUpdateCallback.subscriptionUpdateRequested();
+    }
     this.engineEvents.add(new ChangeEnabledStateEvent(id, enabled));
   }
 
+  public void subscriptionStateChanged() {
+    if (this.subscriptionUpdateCallback != null)
+    {
+      this.subscriptionUpdateCallback.subscriptionUpdatedApplied();
+    }
+  }
+
   void downloadFinished(final String id, final int responseCode, final String response,
       final Map<String, String> headers)
   {
     this.engineEvents.add(new DownloadFinishedEvent(id, responseCode, response, headers));
   }
 
   private void createAndWriteFile()
   {
@@ -801,9 +800,14 @@
       this.downloader.enqueueDownload(this.createDownloadURL(sub), sub.getId(), headers);
     }
   }
 
   public void connectivityChanged()
   {
     this.downloader.connectivityChanged();
   }
+
+  public interface SubscriptionUpdateCallback {
+    void subscriptionUpdateRequested();
+    void subscriptionUpdatedApplied();
+  }
 }