[Commons Wiki] Update of "VfsFaq" by KenTanaka

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The following page has been changed by KenTanaka:
http://wiki.apache.org/jakarta-commons/VfsFaq

The comment on the change is:
Added a Q and A for "How do I keep an SFTP connection from hanging?"

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  VfsCookbook - a cookbook has been started
  
- == How to enter ftp passive mode ==
+ == How can I enter ftp passive mode? ==
  
  {{{
  FileSystemOptions opts = new FileSystemOptions();
@@ -15, +15 @@

  FileObject fo = VFS.getManager().resolveFile("ftp://host/path_to/file.txt", opts);
  }}}
  
- == How to use the org.apache.commons.vfs.FileSelector or org.apache.commons.vfs.FileFilter ==
+ == How do I use the org.apache.commons.vfs.FileSelector or org.apache.commons.vfs.FileFilter? ==
  
  The FileFilter can be used to mimic the java.io.FileFilter interface.
  
@@ -58, +58 @@

  VFS.getManager().resolveFile("/base/folder").findFiles(ff);
  }}}
  
+ == How do I keep an SFTP connection from hanging? ==
+ If your program is transferring files, but not exiting afterward, this is actually an issue with properly closing down the connection when you are done. If you acquired a !FileSystemManager with
+ 
+ {{{
+ private FileSystemManager fsManager = VFS.getManager();
+ }}}
+ 
+ the getManager() method probably returned a [http://commons.apache.org/vfs/apidocs/org/apache/commons/vfs/impl/StandardFileSystemManager.html StandardFileSystemManager] which extends the !DefaultFileSystemManager class and implements the !FileSystemManager interface.
+ 
+ What you are probably after is the [http://commons.apache.org/vfs/apidocs/org/apache/commons/vfs/impl/DefaultFileSystemManager.html#close() close()] method of the !DefaultFileSystemManager to clean up any temporary files and close all providers. Cast the !FileSystemManager to a !DefaultFileSystemManager access the close() method like this:
+ 
+ {{{
+ ((DefaultFileSystemManager) fsManager).close();
+ }}}
+ 

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