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From: Ryan Blue <rblue@netflix.com>
Date: Tue, 6 Sep 2016 10:16:52 -0700
Message-ID: <CAO4re1mWkbqjoR6VawcBj3+HXVKo2BNDx84pOKPOE4xap9rQtw@mail.gmail.com>
Subject: Re: Apache Avro to .NET Core
To: Avro Dev List <dev@avro.apache.org>
Cc: user@avro.apache.org
Content-Type: multipart/alternative; boundary=001a114298ec474f05053bd9f8a7
archived-at: Tue, 06 Sep 2016 17:17:30 -0000

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Hi Welly,

I'm not very familiar with .NET or the C# Avro library, hopefully others
can help answer your specific question. One alternative is to look at the
Microsoft C# library, which also has codegen features and is intended for
use for .NET:


https://azure.microsoft.com/en-us/updates/microsoft-avro-library-updated-to-include-c-code-generator/

rb

On Mon, Sep 5, 2016 at 5:12 AM, Welly Tambunan <if05041@gmail.com> wrote:

> Hi All,
>
> I'm trying to port apache avro to .NET core.
>
> Here's the repository for the project
>
> https://github.com/welly87/Apache-Avro-Core
>
>
> However i found that some of the class and method is missing regarding
> Assembly loading and IL generation. I'm really close to completing the
> porting.
>
> [image: Inline image 1]
>
> #1. Is there any replacement on this line of code in .NET core ?
> Assembly[] assemblies = AppDomain.CurrentDomain.GetAssemblies();
>
> #2. Another one is IL Generator. Any idea how to replace this code ?
>
>         public CtorDelegate GetConstructor(string name, Schema.Type
> schemaType, Type type)
>         {
>             ConstructorInfo ctorInfo = type.GetConstructor(Type.Empty
> Types);
>             if (ctorInfo == null)
>                 throw new AvroException("Class " + name + " has no default
> constructor");
>
>             DynamicMethod dynMethod = new DynamicMethod("DM$OBJ_FACTORY_"
> + name, typeof(object), null, type, true);
>             ILGenerator ilGen = dynMethod.GetILGenerator();
>             ilGen.Emit(OpCodes.Nop);
>             ilGen.Emit(OpCodes.Newobj, ctorInfo);
>             ilGen.Emit(OpCodes.Ret);
>
>             return (CtorDelegate)dynMethod.CreateDelegate(ctorType);
>         }
>
> Thanks
>
> Cheers
> --
> Welly Tambunan
> Triplelands
>
> http://weltam.wordpress.com
> http://www.triplelands.com <http://www.triplelands.com/blog/>
>


-- 
Ryan Blue
Software Engineer
Netflix

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<div dir=3D"ltr">Hi Welly,<div><br></div><div>I&#39;m not very familiar wit=
h .NET or the C# Avro library, hopefully others can help answer your specif=
ic question. One alternative is to look at the Microsoft C# library, which =
also has codegen features and is intended for use for .NET:</div><div><br><=
/div><div>=C2=A0 <a href=3D"https://azure.microsoft.com/en-us/updates/micro=
soft-avro-library-updated-to-include-c-code-generator/">https://azure.micro=
soft.com/en-us/updates/microsoft-avro-library-updated-to-include-c-code-gen=
erator/</a><br></div><div><br></div><div>rb</div></div><div class=3D"gmail_=
extra"><br><div class=3D"gmail_quote">On Mon, Sep 5, 2016 at 5:12 AM, Welly=
 Tambunan <span dir=3D"ltr">&lt;<a href=3D"mailto:if05041@gmail.com" target=
=3D"_blank">if05041@gmail.com</a>&gt;</span> wrote:<br><blockquote class=3D=
"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding=
-left:1ex"><div dir=3D"ltr">Hi All,=C2=A0<div><br></div><div>I&#39;m trying=
 to port apache avro to .NET core.=C2=A0</div><div><br></div><div>Here&#39;=
s the repository for the project=C2=A0</div><div><br></div><div><a href=3D"=
https://github.com/welly87/Apache-Avro-Core" target=3D"_blank">https://gith=
ub.com/welly87/<wbr>Apache-Avro-Core</a>=C2=A0<br></div><div><br></div><div=
><br></div><div><div>However i found that some of the class and method is m=
issing regarding Assembly loading and IL generation. I&#39;m really close t=
o completing the porting.=C2=A0</div><div><br></div><div><img alt=3D"Inline=
 image 1" style=3D"font-size:12.8px;margin-right:25px"><br clear=3D"all" st=
yle=3D"font-size:12.8px"><div style=3D"font-size:12.8px"><br></div><div sty=
le=3D"font-size:12.8px">#1. Is there any replacement on this line of code i=
n .NET core ?=C2=A0</div><div style=3D"font-size:12.8px"><span style=3D"fon=
t-size:12.8px">Assembly[] assemblies =3D AppDomain.CurrentDomain.</span><sp=
an style=3D"font-size:12.8px">GetAss<wbr>emblies();</span></div><div style=
=3D"font-size:12.8px"><br></div><div style=3D"font-size:12.8px">#2. Another=
 one is IL Generator. Any idea how to replace this code ?</div><div style=
=3D"font-size:12.8px"><br></div><div style=3D"font-size:12.8px"><div>=C2=A0=
 =C2=A0 =C2=A0 =C2=A0 public CtorDelegate GetConstructor(string name, Schem=
a.Type schemaType, Type type)</div><div>=C2=A0 =C2=A0 =C2=A0 =C2=A0 {</div>=
<div>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 ConstructorInfo ctorInfo =3D=
 type.GetConstructor(Type.Empty<wbr>Types);</div><div>=C2=A0 =C2=A0 =C2=A0 =
=C2=A0 =C2=A0 =C2=A0 if (ctorInfo =3D=3D null)</div><div>=C2=A0 =C2=A0 =C2=
=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 throw new AvroException(&quot;Class =
&quot; + name + &quot; has no default constructor&quot;);</div><div><br></d=
iv><div>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 DynamicMethod dynMethod =
=3D new DynamicMethod(&quot;DM$OBJ_FACTORY_<wbr>&quot; + name, typeof(objec=
t), null, type, true);</div><div>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =
ILGenerator ilGen =3D dynMethod.GetILGenerator();</div><div>=C2=A0 =C2=A0 =
=C2=A0 =C2=A0 =C2=A0 =C2=A0 ilGen.Emit(OpCodes.Nop);</div><div>=C2=A0 =C2=
=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 ilGen.Emit(OpCodes.Newobj, ctorInfo);</div>=
<div>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 ilGen.Emit(OpCodes.Ret);</di=
v><div><br></div><div>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 return (Cto=
rDelegate)dynMethod.Create<wbr>Delegate(ctorType);</div><div>=C2=A0 =C2=A0 =
=C2=A0 =C2=A0 }</div></div><div style=3D"font-size:12.8px"><br></div></div>=
</div><div style=3D"font-size:12.8px">Thanks</div><div><br clear=3D"all"><d=
iv>Cheers</div><span class=3D"HOEnZb"><font color=3D"#888888">-- <br><div d=
ata-smartmail=3D"gmail_signature">Welly Tambunan<br>Triplelands=C2=A0<br><b=
r><a href=3D"http://weltam.wordpress.com" target=3D"_blank">http://weltam.w=
ordpress.com</a><div><a href=3D"http://www.triplelands.com/blog/" target=3D=
"_blank">http://www.triplelands.com</a></div></div>
</font></span></div></div>
</blockquote></div><br><br clear=3D"all"><div><br></div>-- <br><div class=
=3D"gmail_signature" data-smartmail=3D"gmail_signature"><div dir=3D"ltr"><d=
iv><div dir=3D"ltr">Ryan Blue<div>Software Engineer</div><div><span style=
=3D"font-size:12.8px">Netflix</span></div></div></div></div></div>
</div>

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