DLR Hosting Sample : Simple dlr host using the new App.Config based ScriptRuntime creation

seshadripv — Thu, 11 Sep 2008 20:58:00 GMT

Due to the recent changes to the DLR Hosting API, dlr hosts now have to use the App.Config file to configure the languages they intend to use in the application. It’s probably a little bit more complex than before to get started on Hosting the DLR after this change.

The attached self contained sample(for VS 2008) addresses this and tries to make it easier to ‘get started’. The sample is a very simple console application that -

1) Hosts the dlr

2) Uses the ScriptRuntimeSetup.ReadConfiguration() and the ScriptRuntime constructor to create the runtime based on the entries in the App.Config file

3) Creates 2 language engines – one for IronPython and 1 for IronRuby

4) Creates a variable in IronPython and prints the value in C#.

The sample contains a pre configured App.Config file. You should be able to just extract the files locally and build the sample and execute it. The dlr and language binaries are also included (in the ‘lib’ folder). Note that these post IronPython V2 beta4 binaries are for demo purposes only and come with no warranty or support.

DLR Hosting API : latest version of the spec is available online (includes changes to runtime initialization)

seshadripv — Mon, 08 Sep 2008 00:32:00 GMT

The latest version of the Hosting API spec is available here. The most recent source code drop to the IronPython codeplex site conforms to this spec (except for some open bugs).

The biggest change this spec introduces to the beta4 binaries is the way the hosting runtime is initialized.

Prior to this update, the hosting runtime is initialized by creating a new ScriptRuntime object. Now, a typical runtime initialization involves 2 things.

A quick 5 min how-to on the new initialization is as follows

1) Setting up entries in the application’s config file. Here is a sample config file

<?xml version="1.0" encoding="utf-8" ?>

<section name="microsoft.scripting"

type="Microsoft.Scripting.Hosting.Configuration.Section, Microsoft.Scripting, Version=1.0.0.5000, Culture=neutral, publicKeyToken=31bf3856ad364e35"

requirePermission="false" />

</configSections>

<microsoft.scripting>

<language names="IronPython,Python,py"

extensions=".py"

displayName="IronPython 2.0 Beta"

type="IronPython.Runtime.PythonContext,IronPython, Version=2.0.0.5000, Culture=neutral, publicKeyToken=31bf3856ad364e35" />

<language names="IronRuby;Ruby,rb"

extensions=".rb"

displayName="IronRuby 1.0 Alpha"

type="IronRuby.Runtime.RubyContext, IronRuby, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>

</languages>

</microsoft.scripting>

</configuration>

2) Calling the following methods

ScriptRuntimeSetup srs = ScriptRuntimeSetup.ReadConfiguration();

ScriptRuntime runtime = new ScriptRuntime(srs);

DLR Hosting and related stuff... : ScriptRuntimeSetup

DLR Hosting Sample : Simple dlr host using the new App.Config based ScriptRuntime creation

DLR Hosting API : latest version of the spec is available online (includes changes to runtime initialization)