我想第一次使用java期货。我有一个课程设置为解压缩一些文件。想要递归解压缩,因为我有zip文件包含zip文件。使用Java期货的线程安全集合操作
我有一个驱动器类,实例化一个实现可调用的Uncompressor类。解压缩器开始解压缩,如果遇到另一个.zip,它会创建一个自己的实例,将其添加到池中,然后继续。
伪代码
From DriverClass:
.
.
.
ExecutorService pool = new Executors.newFixedThreadPool(4);
Uncompressor uc = new Uncompressor(pool, compressedFile);
Collection<File> files = uc.uncompress();
for(Future <Collection<File>> f : uc.futures)
files.addAll(f.get());
// at the end of this loop, files doesnt seem to hold all of my files
这里是我的uncompressor类
public class Uncompressor implements Callable<Collection<File>>
{
public Set<Future<Collection<File>>> futures = new HashSet<Future<Collection<File>>>();
File compressedFile;
public Uncompressor(ExecutorService pool, File compressedFile)
{
this.pool = pool;
this.compressedFile = compressedFile;
}
public Collection<File> call() throws Exception[
return uncompress();
}
public Collection<File> uncompress()
{
List<File> uncompressedFiles = new ArrayList<File>();
.
.Loop
.//Try to uncompress the file. If the archive entry is a zip file, do the following:
Callable<Collection<File>> callable = new Uncompressor(this.pool, archiveFileEntry);
Future f = pool.submit(callable);
futures.add(f);
//else, add files to a collection here for returning
uncompressedFiles.add(archiveFileEntry);
.EndLoop
return uncompressedFiles;
.
.
}
所以,问题是我DriverClass,我的文件的采集应保存所有未压缩的文件从递归在这里下潜似乎并没有包含所有的文件。我认为我在从未来获取返回值时做错了什么。是否因为我定义了一个类成员变量futures
?
谢谢
是的,这是可能的。它可以是zip内的任意数量的zip,真的是 – Derek 2012-04-20 15:08:09