/** Processes requests on the main thread. */
@Override
public boolean handleMessage(Message msg) {
switch (msg.what) {
case MESSAGE_REQUEST_LOADING:
{
mLoadingRequested = false;
if (!mPaused) {
if (mLoaderThread == null) {
mLoaderThread = new LoaderThread(mContext.getContentResolver());
mLoaderThread.start();
}
mLoaderThread.requestLoading();
}
return true;
}
case MESSAGE_PHOTOS_LOADED:
{
if (!mPaused) {
processLoadedImages();
}
return true;
}
}
return false;
}
private void startLoaderThreadIfStopped() {
if (loaderThread == null) {
loaderThread = new LoaderThread();
loaderThread.start();
}
}
private void dispose() {
lock.lock();
if (loaderThread != null) {
loaderThread.isCancelled = true;
loaderThread = null;
}
condition.signal();
lock.unlock();
}
/** Stops loading images, kills the image loader thread and clears all caches. */
public void stop() {
pause();
if (mLoaderThread != null) {
mLoaderThread.quit();
mLoaderThread = null;
}
mPendingRequests.clear();
mBitmapCache.clear();
}
/** Shutdown the build-in indexing thread and wait until it dies. */
public void shutdown() {
synchronized (this) {
_stop = true;
this.notifyAll();
}
try {
_loadMgrThread.join();
} catch (InterruptedException e) {
log.error(e.getMessage(), e);
}
}
/** @see proj.zoie.api.DataConsumer#consume(java.util.Collection) */
public void consume(Collection<DataEvent<V>> events) throws ZoieException {
if (events != null) {
// PriorityQueue<DataEvent<ZoieIndexable>> indexableList = new
// PriorityQueue<DataEvent<ZoieIndexable>>(data.size(), DataEvent.getComparator());
ArrayList<DataEvent<ZoieIndexable>> indexableList =
new ArrayList<DataEvent<ZoieIndexable>>(events.size());
Iterator<DataEvent<V>> iter = events.iterator();
while (iter.hasNext()) {
try {
DataEvent<V> event = iter.next();
ZoieIndexable indexable =
((ZoieIndexableInterpreter<V>) _interpreter).convertAndInterpret(event.getData());
DataEvent<ZoieIndexable> newEvent =
new DataEvent<ZoieIndexable>(event.getVersion(), indexable);
indexableList.add(newEvent);
} catch (Exception e) {
log.error(e.getMessage(), e);
}
}
synchronized (this) // this blocks the batch disk loader thread while indexing to RAM
{
while (_batchList.size() > _maxBatchSize) {
// check if load manager thread is alive
if (_loadMgrThread == null || !_loadMgrThread.isAlive()) {
throw new ZoieException("load manager has stopped");
}
try {
this.wait(60000); // 1 min
} catch (InterruptedException e) {
continue;
}
}
_eventCount += indexableList.size();
_batchList.addAll(indexableList);
this.notifyAll();
}
}
}
/**
* @param dataLoader
* @param batchSize
* @param maxBatchSize
* @param delay
* @param idxMgr
* @param lsnrList the list of IndexingEventListeners. This should be a <b>Synchronized</b> list
* if the content of this list is mutable.
*/
public BatchedIndexDataLoader(
DataConsumer<ZoieIndexable> dataLoader,
int batchSize,
int maxBatchSize,
long delay,
SearchIndexManager<R> idxMgr,
ZoieIndexableInterpreter<V> interpreter,
Queue<IndexingEventListener> lsnrList) {
_maxBatchSize = Math.max(maxBatchSize, 1);
_batchSize = Math.min(batchSize, _maxBatchSize);
_delay = delay;
_dataLoader = dataLoader;
_batchList = new LinkedList<DataEvent<ZoieIndexable>>();
_lastFlushTime = 0L;
_eventCount = 0;
_loadMgrThread = new LoaderThread();
_loadMgrThread.setName("disk indexer data loader");
_stop = false;
_flush = false;
_idxMgr = idxMgr;
_interpreter = interpreter;
_lsnrList = lsnrList;
}
/** Call this from the activity's onPause() */
public void stopBackgroundThread() {
mLoaderThread.shutdown();
}
/** Call this from the activity's onResume() */
public void startBackgroundThread() {
mLoaderThread = new LoaderThread(mLoaderQueue, this);
mLoaderThread.start();
}
/** Starts the build-in indexing thread. */
public void start() {
_loadMgrThread.setName(String.valueOf(this));
_loadMgrThread.start();
}
