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https://issues.apache.org/jira/browse/ETCH-157?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13026185#comment-13026185
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Holger Grandy commented on ETCH-157:
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Hi Armin, 

thanks for providing the patches! The first oen is already committed in trunk, 
Michael and me will look into the other ones. 
We will give you Feedback on the mailing list. 

Cheers,
Holger

> UDP implementation for Java, C# and C binding
> ---------------------------------------------
>
>                 Key: ETCH-157
>                 URL: https://issues.apache.org/jira/browse/ETCH-157
>             Project: Etch
>          Issue Type: New Feature
>          Components: build, c-binding, compiler, csharp-binding, examples, 
> java-binding, webpage
>    Affects Versions: 1.2
>            Reporter: Armin Müller
>              Labels: patch
>         Attachments: 0001-build-add-skip.examples-property.patch, 
> 0002-binding-csharp-bump-dependencies-to-.NET-4.0-and-NUn.patch, 
> 0003-binding-csharp-add-mono-support.patch, 
> 0004-binding-csharp-add-udp-transport-support.patch, 
> 0005-binding-java-add-udp-transport-support.patch, 
> 0006-binding-csharp-add-udp-single-session-support.patch, 
> 0007-binding-java-add-udp-single-session-support.patch, 
> 0008-binding-c-add-inet_who-object.patch, 
> 0009-binding-c-add-udp-single-session-transport.patch, 
> 0010-compiler-add-Signal-annotation-support.patch, 
> 0011-binding-csharp-add-Signal-support.patch, 
> 0012-binding-java-add-Signal-support.patch, 
> 0013-binding-c-extend-send-sendex-for-etch_who.patch, 
> 0014-binding-c-add-Signal-support.patch, 
> 0015-examples-add-signals-example-for-csharp-java-and-c.patch, 
> Etch_UDP_Multi_Session.png, Etch_UDP_Single_Session.png, 
> Leightweight_Etch_UDP_Server.txt
>
>
> Hi,
> attached are a series of patches, which add UDP support to Etch for the Java, 
> C# and C bindings. It can be used in place of TCP by replacing the url scheme 
> with UDP. The UDP transport support has been extended with a configurable 
> single session mode, which can be used to run leightweight servers. Please 
> see the attached file "Leightweight_Etch_Server.txt" for a more detailed 
> description of this mode. It has been written in the confluence wiki style 
> syntax and together with the attached images it's suitable for creating a new 
> etch documentation page. The single session mode has been extended further 
> with a support for one-way method calls from the server to multiple clients. 
> For more information, please look at the "Signals" section and the attached 
> patch files.
> The UDP implementation for the C binding is limited to single session mode. 
> It limits the ability of etch servers to call methods of more than one remote 
> client. The signal extension can be used to avoid this limitation.
> Below a short description of the attached patches is listed. They can be 
> applied using the following GIT command: "git am -k --keep-cr 
> --whitespace=nowarn <path>/*.patch" or can be applied to a clean SVN 
> checkout:  "patch -p1 -i <path>/*.patch".
> * Add property to skip building of the examples:
> 0001-build-add-skip.examples-property.patch
> * Bump dependency to .NET 4.0 and NUnit 2.5.9. The C# UDP implementation is 
> based on features available in .NET 4.0.
> 0002-binding-csharp-bump-dependencies-to-.NET-4.0-and-NUn.patch
> * Add runtime and build support for the Mono framework (Mono >= 2.10.1, C#).
> 0003-binding-csharp-add-mono-support.patch
> * Make UDP and TCP protocols seamlessly interchangable in Etch (UDP support 
> for C# and Java).
> 0004-binding-csharp-add-udp-transport-support.patch
> 0005-binding-java-add-udp-transport-support.patch
> * Add configurable server single session mode. URL parameter: 
> UdpConnection.singleSession=true
> 0006-binding-csharp-add-udp-single-session-support.patch
> 0007-binding-java-add-udp-single-session-support.patch
> * Add inet_who object to track remote etch clients. Required by the C UDP 
> implementation.
> 0008-binding-c-add-inet_who-object.patch
> * Add UDP transport support to the C binding (single session only). The 
> "UdpConnection.singleSession" url parameter is not supported and ignored. A 
> patched version of APR (test with version 1.4.2) is required to send 
> broadcast messages under Linux. The patch has been submitted, but is 
> currently not integrated (see 
> https://issues.apache.org/bugzilla/show_bug.cgi?id=46389).
> 0009-binding-c-add-UDP-single-session-transport.patch
> * Add signal support for single session mode. See the attached 
> "Leightweight_Etch_Server.txt" document.
> 0010-compiler-add-Signal-annotation-support.patch
> 0011-binding-csharp-add-Signal-support.patch
> 0012-binding-java-add-Signal-support.patch
> 0013-binding-c-extend-send-sendex-for-etch_who.patch
> 0014-binding-c-add-Signal-support.patch
> * Add signal examples for the C#, Java and C binding.
> 0015-examples-add-signals-example-for-csharp-java-and-c.patch
> Authors:
> Armin Müller <[email protected]> (itestra GmbH by order of BMW Group 
> Research and Technology)
> Aleksandar Kanchev <[email protected]> (itestra GmbH by order of BMW Group 
> Research and Technology)

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