public CacheItem put(final String url, final Object obj, DateTime expiresAt) {
if (obj == null) {
return null;
}
Timber.d(String.format("put(%s)", url));
CacheItem d = new CacheItem(obj, expiresAt);
if (null != mMemoryCache) {
mMemoryCache.put(url, d);
}
if (null != mDiskCache) {
checkNotOnMainThread();
final String key = transformUrlForDiskCacheKey(url);
final ReentrantLock lock = getLockForDiskCacheEdit(key);
lock.lock();
try {
DiskLruCache.Editor editor = mDiskCache.edit(key);
writeValueToDisk(editor.newOutputStream(0), obj);
writeExpirationToDisk(editor.newOutputStream(1), expiresAt);
editor.commit();
} catch (IOException e) {
e.printStackTrace();
} finally {
lock.unlock();
scheduleDiskCacheFlush();
}
}
return d;
}
public boolean containsInDiskCache(String url) {
if (null != mDiskCache) {
checkNotOnMainThread();
try {
return null != mDiskCache.get(transformUrlForDiskCacheKey(url));
} catch (IOException e) {
e.printStackTrace();
}
}
return false;
}
public void remove(String url) {
if (null != mMemoryCache) {
mMemoryCache.remove(url);
}
if (null != mDiskCache) {
checkNotOnMainThread();
try {
mDiskCache.remove(transformUrlForDiskCacheKey(url));
scheduleDiskCacheFlush();
} catch (IOException e) {
e.printStackTrace();
}
}
}
public CacheItem getFromDiskCache(final String url, boolean checkExpiration) {
CacheItem result = null;
if (null != mDiskCache) {
checkNotOnMainThread();
try {
final String key = transformUrlForDiskCacheKey(url);
DiskLruCache.Snapshot snapshot = mDiskCache.get(key);
if (null != snapshot) {
Object value = readValueFromDisk(snapshot.getInputStream(0));
DateTime expiresAt = new DateTime(readExpirationFromDisk(snapshot.getInputStream(1)));
if (value != null) {
if (checkExpiration && expiresAt.isBeforeNow()) {
mDiskCache.remove(key);
scheduleDiskCacheFlush();
} else {
result = new CacheItem(value, expiresAt);
if (null != mMemoryCache) {
mMemoryCache.put(url, result);
}
}
} else {
// If we get here, the file in the cache can't be
// decoded. Remove it and schedule a flush.
mDiskCache.remove(key);
scheduleDiskCacheFlush();
}
}
} catch (IOException e) {
Timber.e(e, "getFromDiskCache failed.");
}
}
return result;
}