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https://issues.apache.org/jira/browse/SSHD-812?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16434019#comment-16434019
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Guillaume Nodet commented on SSHD-812:
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[~lgoldstein] What's the supposed split between {{SftpSubsystem}} and
{{AbstractSftpSubsystemHelper}} ? I have quite a hard time understanding the
concept here.
I would think that {{AbstractSftpSubsystemHelper}} should handle all the sftp
protocol side of things (decoding buffers, encoding requests) while the
subclass implementation will deal with the i/o (receiving requests, sending
responses and dealing with the file system).
One problem I have is that while AbstractSftpSubsystemHelper is abstract from
{{Handle}} and its subclasses, the {{SftpEventListener}}s are not, so the API
is not well defined enough I think.
> support asynchronous mode for sftp subsystem
> --------------------------------------------
>
> Key: SSHD-812
> URL: https://issues.apache.org/jira/browse/SSHD-812
> Project: MINA SSHD
> Issue Type: New Feature
> Affects Versions: 1.7.0
> Environment: java1.8, linux
> Reporter: Zhenliang Su
> Assignee: Goldstein Lyor
> Priority: Minor
> Labels: asynchronous, sftp
> Attachments: Main.java, doRead.png
>
>
> I used SSHD as a middleman between client and target sftp server.
> I found that, when filezilla client directly connect to the target sftp
> server, it transfers fast. When filezilla client connect to the middleman, it
> transfers slow.
> I analyzed the source code of
> org.apache.sshd.server.subsystem.sftp.SftpSubsystem#doRead, and I found it
> behaves like block mode, and client's other SSH_FXP_READ request blocked in
> the same thread.
>
> my middleman code:
> [^Main.java]
>
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