private DownloadResult download(
DownloadCheckPoint downloadCheckPoint, DownloadFileRequest downloadFileRequest)
throws Throwable {
DownloadResult downloadResult = new DownloadResult();
ArrayList<PartResult> taskResults = new ArrayList<PartResult>();
ExecutorService service = Executors.newFixedThreadPool(downloadFileRequest.getTaskNum());
ArrayList<Future<PartResult>> futures = new ArrayList<Future<PartResult>>();
List<Task> tasks = new ArrayList<Task>();
for (int i = 0; i < downloadCheckPoint.downloadParts.size(); i++) {
if (!downloadCheckPoint.downloadParts.get(i).isCompleted) {
Task task =
new Task(
i, "download-" + i, downloadCheckPoint, i, downloadFileRequest, objectOperation);
futures.add(service.submit(task));
tasks.add(task);
} else {
taskResults.add(
new PartResult(
i + 1,
downloadCheckPoint.downloadParts.get(i).start,
downloadCheckPoint.downloadParts.get(i).end));
}
}
service.shutdown();
service.awaitTermination(Long.MAX_VALUE, TimeUnit.SECONDS);
for (Future<PartResult> future : futures) {
try {
PartResult tr = future.get();
taskResults.add(tr);
} catch (ExecutionException e) {
throw e.getCause();
}
}
Collections.sort(
taskResults,
new Comparator<PartResult>() {
@Override
public int compare(PartResult p1, PartResult p2) {
return p1.getNumber() - p2.getNumber();
}
});
downloadResult.setPartResults(taskResults);
if (tasks.size() > 0) {
downloadResult.setObjectMetadata(tasks.get(0).GetobjectMetadata());
}
return downloadResult;
}
