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Minor refactor on caches

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This commit is contained in:
inorichi 2016-01-28 01:01:55 +01:00
parent d8ab8f297f
commit 74c32f9e16
3 changed files with 77 additions and 120 deletions
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134
app/src/main/java/eu/kanade/tachiyomi/data/cache/ChapterCache.java vendored
View File

@ -44,12 +44,15 @@ public class ChapterCache {
/** Interface to global information about an application environment. */
private final Context context;
/** Google Json class used for parsing json files. */
/** Google Json class used for parsing JSON files. */
private final Gson gson;
/** Cache class used for cache management. */
private DiskLruCache diskCache;
/** Page list collection used for deserializing from JSON. */
private final Type pageListCollection;
/**
* Constructor of ChapterCache.
* @param context application environment interface.
@ -69,28 +72,10 @@ public class ChapterCache {
PARAMETER_CACHE_SIZE
);
} catch (IOException e) {
// Do Nothing. TODO error handling.
// Do Nothing.
}
}
/**
* Remove file from cache.
* @param file name of chapter file md5.0.
* @return false if file is journal or error else returns status of deletion.
*/
public boolean removeFileFromCache(String file) {
// Make sure we don't delete the journal file (keeps track of cache).
if (file.equals("journal") || file.startsWith("journal."))
return false;
try {
// Take dot(.) substring to get filename without the .0 at the end.
String key = file.substring(0, file.lastIndexOf("."));
// Remove file from cache.
return diskCache.remove(key);
} catch (IOException e) {
return false;
}
pageListCollection = new TypeToken<List<Page>>() {}.getType();
}
/**
@ -118,64 +103,57 @@ public class ChapterCache {
}
/**
* Get page objects from cache.
* @param chapterUrl the url of the chapter.
* @return list of chapter pages.
* Remove file from cache.
* @param file name of file "md5.0".
* @return status of deletion for the file.
*/
public Observable<List<Page>> getPageUrlsFromDiskCache(final String chapterUrl) {
return Observable.create(subscriber -> {
public boolean removeFileFromCache(String file) {
// Make sure we don't delete the journal file (keeps track of cache).
if (file.equals("journal") || file.startsWith("journal."))
return false;
try {
// Remove the extension from the file to get the key of the cache
String key = file.substring(0, file.lastIndexOf("."));
// Remove file from cache.
return diskCache.remove(key);
} catch (IOException e) {
return false;
}
}
/**
* Get page list from cache.
* @param chapterUrl the url of the chapter.
* @return an observable of the list of pages.
*/
public Observable<List<Page>> getPageListFromCache(final String chapterUrl) {
return Observable.fromCallable(() -> {
// Initialize snapshot (a snapshot of the values for an entry).
DiskLruCache.Snapshot snapshot = null;
try {
// Get list of pages from chapterUrl.
List<Page> pages = getPageUrlsFromDiskCacheImpl(chapterUrl);
// Provides the Observer with a new item to observe.
subscriber.onNext(pages);
// Notify the Observer that finished sending push-based notifications.
subscriber.onCompleted();
} catch (Throwable e) {
subscriber.onError(e);
// Create md5 key and retrieve snapshot.
String key = DiskUtils.hashKeyForDisk(chapterUrl);
snapshot = diskCache.get(key);
// Convert JSON string to list of objects.
return gson.fromJson(snapshot.getString(0), pageListCollection);
} finally {
if (snapshot != null) {
snapshot.close();
}
}
});
}
/**
* Implementation of the getPageUrlsFromDiskCache() function
* @param chapterUrl the url of the chapter
* @return returns list of chapter pages
* @throws IOException does nothing atm
*/
private List<Page> getPageUrlsFromDiskCacheImpl(String chapterUrl) throws IOException /*TODO IOException never thrown*/ {
// Initialize snapshot (a snapshot of the values for an entry).
DiskLruCache.Snapshot snapshot = null;
// Initialize list of pages.
List<Page> pages = null;
try {
// Create md5 key and retrieve snapshot.
String key = DiskUtils.hashKeyForDisk(chapterUrl);
snapshot = diskCache.get(key);
// Convert JSON string to list of objects.
Type collectionType = new TypeToken<List<Page>>() {}.getType();
pages = gson.fromJson(snapshot.getString(0), collectionType);
} catch (IOException e) {
// Do Nothing. //TODO error handling?
} finally {
if (snapshot != null) {
snapshot.close();
}
}
return pages;
}
/**
* Add page urls to disk cache.
* Add page list to disk cache.
* @param chapterUrl the url of the chapter.
* @param pages list of chapter pages.
* @param pages list of pages.
*/
public void putPageUrlsToDiskCache(final String chapterUrl, final List<Page> pages) {
public void putPageListToCache(final String chapterUrl, final List<Page> pages) {
// Convert list of pages to json string.
String cachedValue = gson.toJson(pages);
@ -201,7 +179,7 @@ public class ChapterCache {
diskCache.flush();
editor.commit();
} catch (Exception e) {
// Do Nothing. TODO error handling?
// Do Nothing.
} finally {
if (editor != null) {
editor.abortUnlessCommitted();
@ -210,7 +188,7 @@ public class ChapterCache {
try {
outputStream.close();
} catch (IOException ignore) {
// Do Nothing. TODO error handling?
// Do Nothing.
}
}
}
@ -225,9 +203,8 @@ public class ChapterCache {
try {
return diskCache.get(DiskUtils.hashKeyForDisk(imageUrl)) != null;
} catch (IOException e) {
e.printStackTrace();
return false;
}
return false;
}
/**
@ -242,18 +219,17 @@ public class ChapterCache {
File file = new File(diskCache.getDirectory(), imageName);
return file.getCanonicalPath();
} catch (IOException e) {
e.printStackTrace();
return null;
}
return null;
}
/**
* Add image to cache
* Add image to cache.
* @param imageUrl url of image.
* @param response http response from page.
* @throws IOException image error.
*/
public void putImageToDiskCache(final String imageUrl, final Response response) throws IOException {
public void putImageToCache(final String imageUrl, final Response response) throws IOException {
// Initialize editor (edits the values for an entry).
DiskLruCache.Editor editor = null;
@ -276,6 +252,7 @@ public class ChapterCache {
diskCache.flush();
editor.commit();
} catch (Exception e) {
response.body().close();
throw new IOException("Unable to save image");
} finally {
if (editor != null) {
@ -285,7 +262,6 @@ public class ChapterCache {
sink.close();
}
}
}
}

57
app/src/main/java/eu/kanade/tachiyomi/data/cache/CoverCache.java vendored
View File

@ -1,6 +1,7 @@
package eu.kanade.tachiyomi.data.cache;
import android.content.Context;
import android.support.annotation.Nullable;
import android.text.TextUtils;
import android.widget.ImageView;
@ -22,9 +23,9 @@ import eu.kanade.tachiyomi.util.DiskUtils;
/**
* Class used to create cover cache
* Makes use of Glide(which can avoid repeating requests) for saving the file.
* It is not necessary to load the images to the cache.
* Names of files are created with the md5 of the thumbnailURL
* It is used to store the covers of the library.
* Makes use of Glide (which can avoid repeating requests) to download covers.
* Names of files are created with the md5 of the thumbnail URL
*/
public class CoverCache {
@ -39,7 +40,7 @@ public class CoverCache {
private final Context context;
/**
* Cache class used for cache management.
* Cache directory used for cache management.
*/
private final File cacheDir;
@ -59,16 +60,16 @@ public class CoverCache {
}
/**
* Check if cache dir exist if not create directory.
* Create cache directory if it doesn't exist
*
* @return true if cache dir does exist and is created.
* @return true if cache dir is created otherwise false.
*/
private boolean createCacheDir() {
return !cacheDir.exists() && cacheDir.mkdirs();
}
/**
* Download the cover with Glide (it can avoid repeating requests) and save the file.
* Download the cover with Glide and save the file in this cache.
*
* @param thumbnailUrl url of thumbnail.
* @param headers headers included in Glide request.
@ -78,17 +79,15 @@ public class CoverCache {
}
/**
* Download the cover with Glide (it can avoid repeating requests) and save the file.
* Download the cover with Glide and save the file.
*
* @param thumbnailUrl url of thumbnail.
* @param headers headers included in Glide request.
* @param imageView imageView where picture should be displayed.
*/
private void save(String thumbnailUrl, LazyHeaders headers, ImageView imageView) {
private void save(String thumbnailUrl, LazyHeaders headers, @Nullable ImageView imageView) {
// Check if url is empty.
if (TextUtils.isEmpty(thumbnailUrl))
// Do not try and create the string. Instead... only try to realize the truth. There is no string.
return;
// Download the cover with Glide and save the file.
@ -107,29 +106,27 @@ public class CoverCache {
loadFromCache(imageView, resource);
}
} catch (IOException e) {
e.printStackTrace();
// Do nothing.
}
}
});
}
/**
* Copy the cover from Glide's cache to local cache.
* Copy the cover from Glide's cache to this cache.
*
* @param thumbnailUrl url of thumbnail.
* @param source the cover image.
* @throws IOException TODO not returned atm?
* @throws IOException exception returned
*/
private void copyToLocalCache(String thumbnailUrl, File source) throws IOException {
// Create cache directory and check if directory exist
// Create cache directory if needed.
createCacheDir();
// Create destination file.
// Get destination file.
File dest = new File(cacheDir, DiskUtils.hashKeyForDisk(thumbnailUrl));
// Check if file already exists, if true delete it.
// Delete the current file if it exists.
if (dest.exists())
dest.delete();
@ -196,26 +193,9 @@ public class CoverCache {
}
}
/**
* If the image is already in our cache, use it. If not, load it with glide.
* TODO not used atm.
*
* @param imageView imageView where picture should be displayed.
* @param thumbnailUrl url of thumbnail.
* @param headers headers included in Glide request.
*/
public void loadFromCacheOrNetwork(ImageView imageView, String thumbnailUrl, LazyHeaders headers) {
// If localCover exist load it from cache otherwise load it from network.
File localCover = getCoverFromCache(thumbnailUrl);
if (localCover.exists()) {
loadFromCache(imageView, localCover);
} else {
loadFromNetwork(imageView, thumbnailUrl, headers);
}
}
/**
* Helper method to load the cover from the cache directory into the specified image view.
* Glide stores the resized image in its cache to improve performance.
*
* @param imageView imageView where picture should be displayed.
* @param file file to load. Must exist!.
@ -230,7 +210,8 @@ public class CoverCache {
/**
* Helper method to load the cover from network into the specified image view.
* It does NOT save the image in cache!
* The source image is stored in Glide's cache so that it can be easily copied to this cache
* if the manga is added to the library.
*
* @param imageView imageView where picture should be displayed.
* @param thumbnailUrl url of thumbnail.

6
app/src/main/java/eu/kanade/tachiyomi/data/source/base/Source.java
View File

@ -93,7 +93,7 @@ public abstract class Source extends BaseSource {
}
public Observable<List<Page>> getCachedPageListOrPullFromNetwork(final String chapterUrl) {
return chapterCache.getPageUrlsFromDiskCache(getChapterCacheKey(chapterUrl))
return chapterCache.getPageListFromCache(getChapterCacheKey(chapterUrl))
.onErrorResumeNext(throwable -> {
return pullPageListFromNetwork(chapterUrl);
})
@ -168,7 +168,7 @@ public abstract class Source extends BaseSource {
return getImageProgressResponse(page)
.flatMap(resp -> {
try {
chapterCache.putImageToDiskCache(page.getImageUrl(), resp);
chapterCache.putImageToCache(page.getImageUrl(), resp);
} catch (IOException e) {
return Observable.error(e);
}
@ -182,7 +182,7 @@ public abstract class Source extends BaseSource {
public void savePageList(String chapterUrl, List<Page> pages) {
if (pages != null)
chapterCache.putPageUrlsToDiskCache(getChapterCacheKey(chapterUrl), pages);
chapterCache.putPageListToCache(getChapterCacheKey(chapterUrl), pages);
}
protected List<Page> convertToPages(List<String> pageUrls) {