Make loading of resolution more robust

The loading of the reosultion might fail, if the URL in StreamInfo is
outdated. Remove StreamInfo from cache in that case and retry.

src/main/java/ctbrec/Model.java

@@ -1,5 +1,6 @@
 package ctbrec;
 
+import java.io.EOFException;
 import java.io.IOException;
 import java.io.InputStream;
 import java.util.ArrayList;
@@ -118,6 +119,15 @@ public class Model {
         return Chaturbate.INSTANCE.getResolution(getName());
     }
 
+    /**
+     * Invalidates the entries in StreamInfo and resolution cache for this model
+     * and thus causes causes the LoadingCache to update them
+     */
+    public void invalidateCacheEntries() {
+        Chaturbate.INSTANCE.streamInfoCache.invalidate(getName());
+        Chaturbate.INSTANCE.streamResolutionCache.invalidate(getName());
+    }
+
     public String getOnlineState() throws IOException, ExecutionException {
         return getOnlineState(false);
     }
@@ -251,6 +261,9 @@ public class Model {
                 return res;
             }
 
+            EOFException ex = null;
+            for(int i=0; i<2; i++) {
+                try {
                     MasterPlaylist master = getMasterPlaylist(modelName);
                     for (PlaylistData playlistData : master.getPlaylists()) {
                         if(playlistData.hasStreamInfo() && playlistData.getStreamInfo().hasResolution()) {
@@ -262,6 +275,20 @@ public class Model {
                             }
                         }
                     }
+                    ex = null;
+                    break; // this attempt worked, exit loop
+                } catch(EOFException e) {
+                    // the cause might be, that the playlist url in streaminfo is outdated,
+                    // so let's remove it from cache and retry in the next iteration
+                    streamInfoCache.invalidate(modelName);
+                    ex = e;
+                }
+            }
+
+            if(ex != null) {
+                throw ex;
+            }
+
             streamResolutionCache.put(modelName, res);
             return res;
         }