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From Paulex Yang <paulex.y...@gmail.com>
Subject Re: [classlib][nio][discussion] Implementation of java.nio.channels.spi.SelectorProvider.inheritedChannel()
Date Thu, 13 Jul 2006 06:45:54 GMT
Andrew Zhang wrote:
> On 7/13/06, Paulex Yang <paulex.yang@gmail.com> wrote:
>>
>> Andrew Zhang wrote:
>> > Hello everybody,
>> >
>> > I plan to implement
>> > java.nio.channels.spi.SelectorProvider.inheritedChannel()
>> > method. Currently Harmony simply returns null.
>> >
>> > Spec doesn not specify how to detect inheritedChannel clearly,
>> > "Returns the
>> > channel inherited from the entity that created this Java virtual
>> > machine."
>> > "For example, on UNIX systems, the Internet services daemon 
>> (*inetd*) is
>> > used to start programs to service requests when a request arrives 
>> on an
>> > associated network port. In this example, the process that is started,
>> > inherits a channel representing a network socket. "
>> >
>> > As my understanding, what inherited channel does is redirect socket to
>> > standard input. Therefore, my solution looks like following:
>> Don't need to check the stdout? IIRC inetd redirects both.
>
>
> Paulex, I don't thin it's necessary. Even if stdout/stderr are not
> redirected,
>
> RI still returns inherited channel as long as stdin is redirected on 
> Linux.
OK, thank you. Another question(please forgive me, just for curious), 
how about only stdout is redirected?
>
>>
>> > 1. get standard input file descriptor
>> > 2. assert the file descriptor. If it is a socket type descriptor, then
>> > returns a channel which wraps the descriptor.
>> >
>> > I also wrote some samples for ensuring my understanding. It seems 
>> OK on
>> > linux, but not the case on Window. RI always returns null on Windows
>> > (maybe
>> > because there is no service daemon program on Windows? or my
>> > understanding
>> > is totally wrong?)
>> Any chance to get non-null value if inetd is dummied on Windows? Seems
>> some Services for UNIX(SFU) is provided by MS with Windows server 2003,
>> which can mimic the inetd behavior[1]. I'm not sure if it applies to
>> WinXP, too.
>>
>>
>> [1]http://www.microsoft.com/technet/interopmigration/unix/sfu/intdrutil.mspx 
>>
>>
>> > Therefore, I want to hear suggestions from our community,
>> > espeically folks experienced in network!
>> >
>> > Many thanks in advance!
>> >
>> > Best regards,
>> >
>>
>>
>> -- 
>> Paulex Yang
>> China Software Development Lab
>> IBM
>>
>>
>>
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>>
>
>


-- 
Paulex Yang
China Software Development Lab
IBM



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