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数据加载中……

JSR 203终于要出来啦

JSR-000203 More New I/O APIs for the Java Platform - Early Draft Review

http://jcp.org/aboutJava/communityprocess/edr/jsr203/index.html

API的Early Draft Review出来了，就意味很快就要真的出来啦！！

以下是其文档的一个Sample

static class IOTransaction {
public ByteBuffer buffer() {

}
public long position() {

}
public long updatePosition(int transferred) {

}
  }

  static class WriteHandler implements CompletionHandler<Integer> {

      public WriteHandler(AsynchronousFileChannel ch) {

}

private AsynchronousFileChannel channel() {

}

      public void completed(IoFuture<Integer> result) {
          int bytesTransferred;
          try {
              bytesTransferred = result.getNow();
          } catch (ExecutionException x) {

}

          IOTransaction transaction = (IOTransaction)result.attachment();
          ByteBuffer buffer = transaction.buffer();
          if (buffer.remaining() > 0) {
              long position = transaction.updatePosition(bytesTransferred);
              channel().write(buffer, position, transaction, this);
          }
      }
  }

  FileReference file =

List<IOTransaction> transactionList =

  AsynchronousFileChannel ch = AsynchronousFileChannel.open(file, OpenFlag.WRITE);

  WriteHandler handler = new WriteHandler(ch);

  for (IOTransaction transaction: transactionList) {
      // use the transaction as the attachment
      ch.write(transaction.buffer(), transaction.position(), transaction, handler);
  }

就是我最近很需要的东西，一个异步I/O的实现，十分期待中！！

posted on 2007-04-14 12:15 温少阅读(1180) 评论(1) 编辑收藏网摘