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Groups > comp.lang.java.programmer > #39116

Re: read messages that are both async & sync from one inputstream

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On 2019-08-20 17:35, mike wrote:
> Hi,
> 
> I have an application that sends/receives output from a product using NETCONF protocol. We basically have 3 types of messages:
> 
> 1. Configuration messages which is a write/read ( synchronous)
> 2. KeepAlive messages which is also a write/read ( synchronous ) Done every 10 seconds.
> 3. Notification messages from the product read-only ( asynchronous )
> 
> All of then are running in separate threads.
> 
> All output from product is read from an inputStream. The problem we are facing is that the notification messages are cut of for some reason. I can sometimes see that the KeepAlive read() gets the same message ( it checks the format of the message and decides it is not a KeepAlive response message but rather a notification. So looks like KeepAlive "eats" part of the message and then notification reader is reads what is left.
> 
> Any ideas of how to solve this without the mess of multiple thread sync?
> 
> //mike
> 

You can't read with multiple threads from the same InputStream.

And multiple thread sync is not a mess, it's art.

You need a single-threaded read + multi-threaded dispatch.

-- 
DF.

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read messages that are both async & sync from one inputstream mike <mikaelpetterson@hotmail.com> - 2019-08-20 08:35 -0700
  Re: read messages that are both async & sync from one inputstream Eric Douglas <e.d.programmer@gmail.com> - 2019-08-20 08:53 -0700
  Re: read messages that are both async & sync from one inputstream Eric Sosman <esosman@comcast-dot-net.invalid> - 2019-08-20 13:17 -0400
  Re: read messages that are both async & sync from one inputstream Daniele Futtorovic <da.futt.news@laposte-dot-net.invalid> - 2019-08-20 19:58 +0200
  Re: read messages that are both async & sync from one inputstream Eric Douglas <e.d.programmer@gmail.com> - 2019-08-20 11:04 -0700

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