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Mortar.java
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Mortar.java
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package com.cvte.mortar;
import android.content.Context;
import android.os.Handler;
import java.io.File;
import java.util.HashSet;
import java.util.Set;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.Executor;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
/**
* @description:
* @author: Saul
* @date: 14-11-14
* @version: 1.0
*/
public class Mortar {
private static Mortar sMortar;
private Context mContext;
private Handler mHandler;
private Set<DownloadEntry> mDownloadingSet = new HashSet<DownloadEntry>();
private Mortar(Context context) {
mContext = context;
mHandler = new Handler(context.getMainLooper());
}
public static Mortar getInstance(Context context) {
if (sMortar == null) {
sMortar = new Mortar(context);
}
return sMortar;
}
public synchronized void download(String url, File file, OnDownloadListener listener) {
// make sure downloadEntry not null
DownloadEntry downloadEntry = MortarProvider.load(mContext, url, file.getPath());
if (downloadEntry == null) {
downloadEntry = new DownloadEntry(url, file.getPath(), 0, -1);
}
downloadEntry.listener = listener;
if (mDownloadingSet.contains(downloadEntry)) {
if (downloadEntry.listener != null) {
final DownloadEntry finalDownloadEntry = downloadEntry;
mHandler.post(new Runnable() {
@Override
public void run() {
finalDownloadEntry.listener.onFailure(MortarStatus.CODE_FAILURE_ALREADY_DOWNLOADING,
MortarStatus.MSG_FAILURE_ALREADY_DOWNLOADING);
}
});
}
} else {
mDownloadingSet.add(downloadEntry);
// Fix doInBackground not called, ref : http://stackoverflow.com/questions/16832376/asynctask-doinbackground-not-called
int corePoolSize = 60;
int maximumPoolSize = 80;
int keepAliveTime = 10;
BlockingQueue<Runnable> workQueue = new LinkedBlockingQueue<Runnable>(maximumPoolSize);
Executor threadPoolExecutor = new ThreadPoolExecutor(corePoolSize, maximumPoolSize, keepAliveTime,
TimeUnit.SECONDS, workQueue);
new DownloadTask(mContext, mHandler, mDownloadingSet, downloadEntry).executeOnExecutor(threadPoolExecutor);
}
}
public boolean isDownloading(String url, File file) {
return mDownloadingSet.contains(new DownloadEntry(url, file.getPath(), 0, -1));
}
}