Re: [Ikvm-developers] Am I doing this right

[Volker B. <vb...@in...>]

Hi Graham,

I would suggest the follow solution:

  * define an interface .NET
  * create stub jar file from this interface
  * Write a Java implementation of this .NET interface as a bridge
  * in this Java class you can access the additional cisco stuff
  * Create a jar file from the cisco bridge
  * Add both jar files to your UrlClassLoader
  * Now you need only create your Java class instance and cast it to
    your .NET interface

Volker

Am 19.06.2013 13:27, schrieb Graham Old:
>
> Hi Jeroen
>
> I suspect the jtapi.jar you have is the one I sent you when it would 
> not convert into a dll.
>
> You are correct that this is all based on the Java TAPI interface but 
> Cisco have extended a lot of the calls. One of the problems is knowing 
> when you should use a standard Java call or one of Cisco's extended calls.
>
> I think that trying to convert everything to a dynamic object is going 
> to be very difficult to program and nearly impossible to maintain. 
> This is monitoring phones and is very much about events whenever a 
> phone changes state.
>
> I was thinking that I could try to exec ikvmc at the program start and 
> have it convert whatever jatpi.jar is installed into the correct 
> jtapi.dll for my program. This runs as a windows service so start up 
> time is not important.
>
> Has anyone tried this approach?
>
> Regards
>
> Graham
>
> *From:*Jeroen Frijters [mailto:je...@su...]
> *Sent:* 19 June 2013 06:33
> *To:* Graham Old; ikv...@li...
> *Subject:* RE: Am I doing this right
>
> Hi Graham,
>
> This is the right approach in general, but in specific cases there may 
> be improvements possible if the dynamic parts implements a statically 
> known interface.
>
> I don't know much about jtapi.jar, but in a jtapi.jar I have there is 
> a javax.telephony package. It might be possible to write your code 
> (mostly) in terms of this interface and then statically compile a dll 
> that contains just the javax.telephony classes. If you then use the 
> assembly class loader of this assembly as the parent of your 
> URLClassLoader that loads jtapi.jar, the statically compiled 
> javax.telephony classes will be used.
>
> Regards,
>
> Jeroen
>
> *From:*Graham Old [mailto:gra...@on...]
> *Sent:* Tuesday, June 18, 2013 21:52
> *To:* ikv...@li... 
> <mailto:ikv...@li...>
> *Subject:* [Ikvm-developers] Am I doing this right
>
> Hi Team
>
> I have written a program using the Cisco API for the Call Manager 
> phone system. The API comes as a jtapi.jar
>
> I have converted the jtapi.jar to a jtapi.dll and my program works great.
>
> The problem I have is that there are lots of versions of Call Manager 
> and you have to use the matching jtapi.jar file, so I was looking into 
> loading the jtapi.jar at run time then I can just load whatever 
> version is installed.
>
> These are from VS2010 so using the dll I have this
>
> try
>
> {
>
> CiscoJtapiVersion jv = new CiscoJtapiVersion();
>
>  label1.Text = jv.getVersionName();
>
>  label2.Text = jv.getVersion();
>
>  label3.Text = jv.getMinorVersion().ToString();
>
>  label4.Text = jv.getMajorVersion().ToString();
>
> }
>
> catch(Exception ex)
>
> {
>
> label4.Text = ex.Message;
>
> }
>
> And loading at Run Time I have this:
>
> // Create a URL instance for every jar file that you need
>
> java.net.URL url = new 
> java.net.URL("file:C:\\Windows\\Java\\lib\\jtapi.jar");
>
> // Create an array of all URLS
>
> java.net.URL[] urls = { url };
>
> // Create a ClassLoader
>
> java.net.URLClassLoader loader = new java.net.URLClassLoader(urls);
>
> try
>
> {
>
> // load the Class
>
> java.lang.Class cl = java.lang.Class.forName("CiscoJtapiVersion", 
> true, loader);
>
> // Create a Object via Java reflection
>
> Type type = ikvm.runtime.Util.getInstanceTypeFromClass(cl);
>
> dynamic jv = type.GetConstructor(new Type[] { }).Invoke(null);
>
> label1.Text = jv.getVersionName();
>
> label2.Text = jv.getVersion();
>
>       label3.Text = jv.getMinorVersion().ToString();
>
> label4.Text = jv.getMajorVersion().ToString();
>
> }
>
> catch(Exception ex)
>
> {
>
>  label4.Text = ex.Message;
>
> }
>
> My question is:
>
> Am I going about this the right way?
>
> I assume I need to define all my objects as dynamic as there is no way 
> of getting a static reference
>
> Defining the objects as dynamic makes it a bit unforgiving of any 
> typo's etc.
>
> Thanks
>
> Graham Old
>
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