package com.androidol.util.tiles;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.lang.Thread.UncaughtExceptionHandler;
import java.util.Enumeration;
import java.util.HashSet;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
import java.util.concurrent.FutureTask;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Environment;
import android.util.Log;
import com.androidol.constants.UtilConstants;
import com.androidol.events.Event;
import com.androidol.events.TileEvents;
import com.androidol.exceptions.EmptyCacheException;
import com.androidol.exceptions.TileFileCorruptedException;
import com.androidol.tile.Tile;
import com.androidol.util.Util;
import com.vividsolutions.jts.geom.Coordinate;
public class TileZippedSDCardFutureLoader extends TileFileSystemLoader implements UtilConstants {
protected static final int CacheSizeInByteOnSDCard = 512*1024*1024;
protected boolean mergeContextCacheToSDCard = true;
protected String rootOutputPath = "unionstation"; // just a joke
protected ZipFile zippedPackage;
/**
* Constructor TileFileSystemFutureLoader
*
* @param context
* @param cacheSizeInByte
* @param tileCache
* @param tileEvents
*/
public TileZippedSDCardFutureLoader(Context context, final int cacheSizeInByte, final TileCache tileCache, TileEvents tileEvents) {
super(context, cacheSizeInByte, tileCache, tileEvents);
}
/**
*
* @param url
* @param tile
* @return
* @throws FileNotFoundException
* @throws TileFileCorruptedException
*/
public Future<?> loadTileToMemoryAsync(final String url, final String signature, final Tile tile) throws FileNotFoundException, TileFileCorruptedException {
if(this.pendingQueue.contains(url)) {
//Util.printDebugMessage("...tile " + url + " already in the queue...skip loading from disk....");
// TODO: should I kill the previous loading thread and start a new one?
//this.pendingQueue.remove(url);
return null;
}
// determine whether the tile file exists on FS, or if so, is it corrupted
InputStream zipInputStream = null;
// cached tiles are stores in SD card
final String formattedUrlString = formatTileUrlToTileFilePath(url);
try {
//ZipFile zippedPackage = new ZipFile("/sdcard/androidol/packages/" + this.rootOutputPath + ".zip");
//Util.printDebugMessage("zipped package at: " + "/sdcard/androidol/packages/" + this.rootOutputPath + ".zip");
// TODO: verify if zipped package is valid or not
ZipEntry zipEntry = this.zippedPackage.getEntry(formattedUrlString);
//Util.printDebugMessage("load zip entry: " + formattedUrlString);
// cached tiles are stores in a zipped package on SD card
/*
Enumeration entries = this.zippedPackage.entries();
while(entries.hasMoreElements()) {
ZipEntry ze = (ZipEntry)entries.nextElement();
Util.printDebugMessage(ze.getName());
}
*/
zipInputStream = zippedPackage.getInputStream(zipEntry);
// TODO: check file existence
if(zipInputStream.available() == 0) {
//Util.printDebugMessage(" ...tile " + url + " may be corrupted on disk...");
//this.events.triggerEvent(TileEvents.FS_TILE_CORRUPTED, new Event(TileEvents.FS_TILE_CORRUPTED, url));
throw new TileFileCorruptedException("...load tile " + url + " from zipped package failed...file corrupted...");
}
} catch(FileNotFoundException e) {
throw e; // throw FileNotFoundException to TileProvider to trigger HTTP loading
} catch(IOException e) {
throw new TileFileCorruptedException("...load tile " + url + " from zipped package failed...file corrupted...");
} finally {
// TODO: delete this entry from disk so that -
// - the follow on http loader will get it again and fill the gap
}
final InputStream in = new BufferedInputStream(zipInputStream, IO_BUFFER_SIZE);
synchronized(this) {
this.pendingQueue.add(url);
}
Future<?> future = this.threadPool.submit(
new Runnable() {
@Override
public void run() {
//Util.printDebugMessage("@...started a thread for fs loading...signature: " + signature);
OutputStream out = null;
try {
// TODO: no need
//TileSDCardFutureLoader.this.database.incrementUse(formattedUrlString);
final ByteArrayOutputStream dataStream = new ByteArrayOutputStream();
out = new BufferedOutputStream(dataStream, IO_BUFFER_SIZE);
StreamUtils.copy(in, out);
out.flush();
final byte[] data = dataStream.toByteArray();
//Util.printDebugMessage("...bitmap size in bytes: " + data.length + "...");
if(data.length <= 0) {
Util.printWarningMessage("...load tile " + url + " from disk failed...file corrupted...");
//TileFileSystemLoader.this.events.triggerEvent(TileEvents.FS_TILE_CORRUPTED, new Event(TileEvents.FS_TILE_CORRUPTED, url));
TileZippedSDCardFutureLoader.this.tileCache.removeTile(url);
TileZippedSDCardFutureLoader.this.database.removeTile(formatTileUrlToTileFilePath(url));
// TODO: update the this.cacheUsedInByte
throw new TileFileCorruptedException("...load tile " + url + " from disk failed...file corrupted...");
}
final Bitmap bitmap = BitmapFactory.decodeByteArray(data, 0, data.length);
//Util.printDebugMessage(" ...image size: " + data.length + " bytes");
TileZippedSDCardFutureLoader.this.tileCache.putTile(url, bitmap, tile);
//TileFileSystemLoader.this.pendingQueue.remove(url);
//Util.printDebugMessage("...fs loader pending queue size: " + TileFileSystemLoader.this.pendingQueue.size());
TileZippedSDCardFutureLoader.this.events.triggerEvent(TileEvents.FS_LOAD_SUCCESS, new Event(TileEvents.FS_LOAD_SUCCESS, url));
} catch(Exception e) {
//TileFileSystemFutureLoader.this.pendingQueue.remove(url);
//TileFileSystemLoader.this.events.triggerEvent(TileEvents.FS_TILE_CORRUPTED, new Event(TileEvents.FS_TILE_CORRUPTED, url));
// TODO: exception caught here can not be throw out to main thread in TileProvider
Util.printErrorMessage("...load tile " + url + " from disk failed...file corrupted...");
} finally {
StreamUtils.closeStream(in);
StreamUtils.closeStream(out);
TileZippedSDCardFutureLoader.this.pendingQueue.remove(url);
//Util.printDebugMessage("@...finish a thread for fs loading...signature: " + signature);
}
//Util.printDebugMessage(" ...tile " + url + " removed from TileFileSystemLoader pending queue...queue size: " + TileFileSystemLoader.this.pendingQueue.size());
//Util.printDebugMessage(" ...TileFileSystemLoader pending queue size: " + TileFileSystemLoader.this.pendingQueue.size());
}
}
);
return future;
}
/**
* API Method: saveFile
*
* @param url
* @param data
* @throws IOException
*/
@Override
public void saveFile(final String url, final byte[] data) throws IOException {
// TODO: insert tile images into zipped package
// TODO:
Util.printDebugMessage("write to a zipped package is not supported...switch to offline mode");
}
/**
*
*/
@Override
protected String formatTileUrlToTileFilePath(String url) {
String tileFilePath = "";
//String basePath = "";
//String externalStoreDir = Environment.getExternalStorageDirectory().getAbsolutePath();
//if(externalStoreDir!=null && "".equalsIgnoreCase(externalStoreDir)==false) {
//basePath = externalStoreDir + "/androidol/packages/" + this.rootOutputPath;
//} else {
//basePath = "/sdcard/androidol/packages/" + this.rootOutputPath;
//}
String httpStripped = url.substring(7);
String folderName = httpStripped.substring(0, httpStripped.indexOf("/"));
String fileName = httpStripped.substring(httpStripped.indexOf("/")+1, httpStripped.length()).replace('/', '_');
tileFilePath = /*basePath + */"\\" + folderName + "\\" + fileName;
return tileFilePath;
}
// ==================================================================================================
// getters & setters
// ==================================================================================================
public String getRootOutputPath() {
return rootOutputPath;
}
public void setRootOutputPath(String rootOutputPath) {
this.rootOutputPath = rootOutputPath;
try {
this.zippedPackage = new ZipFile("/sdcard/androidol/packages/" + this.rootOutputPath + ".zip");
} catch(IOException e) {
e.printStackTrace();
}
}
}