From 9faa4f340c762271f86ef5204fa7142de9300ec5 Mon Sep 17 00:00:00 2001
From: Scott Jackson <daneren2005@gmail.com>
Date: Thu, 26 Dec 2013 23:02:54 -0800
Subject: #228 Add time sensitive serialized podcast cache

---
 .../dsub/service/CachedMusicService.java           | 22 +++++++++++++++++++++-
 src/github/daneren2005/dsub/util/FileUtil.java     | 20 +++++++++++++++++---
 2 files changed, 38 insertions(+), 4 deletions(-)

(limited to 'src')

diff --git a/src/github/daneren2005/dsub/service/CachedMusicService.java b/src/github/daneren2005/dsub/service/CachedMusicService.java
index 3c6168d2..3930fc3e 100644
--- a/src/github/daneren2005/dsub/service/CachedMusicService.java
+++ b/src/github/daneren2005/dsub/service/CachedMusicService.java
@@ -382,7 +382,27 @@ public class CachedMusicService implements MusicService {
 	
 	@Override
 	public MusicDirectory getPodcastEpisodes(boolean refresh, String id, Context context, ProgressListener progressListener) throws Exception {
-		return musicService.getPodcastEpisodes(refresh, id, context, progressListener);
+		checkSettingsChanged(context);
+		String altId = "p-" + id;
+		TimeLimitedCache<MusicDirectory> cache = refresh ? null : cachedMusicDirectories.get(altId);
+		MusicDirectory result = (cache == null) ? null : cache.get();
+
+		if(result == null) {
+			if(!refresh) {
+				result = FileUtil.deserialize(context, getCacheName(context, "directory", altId), MusicDirectory.class, 10);
+			}
+
+			if(result == null) {
+				result = musicService.getPodcastEpisodes(refresh, id, context, progressListener);
+				FileUtil.serialize(context, result, getCacheName(context, "directory", altId));
+			}
+			cache = new TimeLimitedCache<MusicDirectory>(TTL_MUSIC_DIR, TimeUnit.SECONDS);
+			cache.set(result);
+			cachedMusicDirectories.put(altId, cache);
+		}
+		return result;
+
+
 	}
 	
 	@Override
diff --git a/src/github/daneren2005/dsub/util/FileUtil.java b/src/github/daneren2005/dsub/util/FileUtil.java
index 57c21e98..f72ae66b 100644
--- a/src/github/daneren2005/dsub/util/FileUtil.java
+++ b/src/github/daneren2005/dsub/util/FileUtil.java
@@ -26,6 +26,7 @@ import java.io.FilenameFilter;
 import java.io.RandomAccessFile;
 import java.io.Serializable;
 import java.util.Arrays;
+import java.util.Date;
 import java.util.SortedSet;
 import java.util.TreeSet;
 import java.util.Iterator;
@@ -419,13 +420,26 @@ public class FileUtil {
 		}
     }
 
-    public static <T extends Serializable> T deserialize(Context context, String fileName, Class<T> tClass) {
+	public static <T extends Serializable> T deserialize(Context context, String fileName, Class<T> tClass) {
+		return deserialize(context, fileName, tClass, 0);
+	}
+
+    public static <T extends Serializable> T deserialize(Context context, String fileName, Class<T> tClass, int hoursOld) {
 		synchronized (kryo) {
 			Input in = null;
 			try {
-				RandomAccessFile file = new RandomAccessFile(context.getCacheDir() + "/" + fileName, "r");
+				File file = new File(context.getCacheDir(), fileName);
+
+				Date fileDate = new Date(file.lastModified());
+				// Convert into hours
+				long age = (new Date().getTime() - fileDate.getTime()) / 1000 / 3600;
+				if(hoursOld != 0 && age > hoursOld) {
+					return null;
+				}
+
+				RandomAccessFile randomFile = new RandomAccessFile(file, "r");
 
-				in = new Input(new FileInputStream(file.getFD()));
+				in = new Input(new FileInputStream(randomFile.getFD()));
 				T result = (T) kryo.readObject(in, tClass);
 				Log.i(TAG, "Deserialized object from " + fileName);
 				return result;
-- 
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