loading a tcl package kept in plug-in resource folder at runtime

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anadgoud asked Feb 26, '10 anadgoud posted Feb 26, '10

loading a tcl package kept in plug-in resource folder at runtime

Hi

In my sdk plug-in resouce folder I have created a folder called "Lib" (at the same level as that Icons) underwhich I have placed a tcl library. I want to load this package at runtime in open request handler, how can I achive this.

I am currently doing it as follows but some how not convinced that it is the right way, please let me know.

URL installURL = Platform.getBundle("myplugin").getEntry("/");
   URL url = null;
   try {
    url = new URL(installURL, "Lib/myTool.tcl");
   } catch (MalformedURLException e1) {
    // TODO Auto-generated catch block
    e1.printStackTrace();
   }

   InputStream stream = null;
   try {
    stream = url.openStream();
   } catch (IOException e1) {
    // TODO Auto-generated catch block
    e1.printStackTrace();
   }

   if (stream == null)
    logMessage(model, IssueSeverity.ERROR, "myTool.tcl failed loading", requestResponse);

   String byteString = new String();
   byte[] b = new byte[100];
   int count = 0;
   try {
    while ((count = stream.read(b, 0,100)) > 0 )
    {
      byteString = byteString + new String(b,0,count);
    }
   } catch (IOException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
   }
   tclInterpreter.execute(byteString);
   tclInterpreter.execute("package require Network"); // I guess this may not be required.

Regards

anadgoud

iTest sdk

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Answer 1 · 2010-02-26T16:36:39Z

KumarS answered Feb 26, '10 KumarS posted Feb 26, '10

You do not have to read in the file. You should be able to simply do:

tclInterpreter.execute("source path_to_your_file");

You should add "package require Network" to top of your myTool.tcl file.

8

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PaulD commented · Feb 26, 2010 at 05:32 PM

True. But I think the problem is that the file doesn't exist in the file system anywhere because it is inside the plugin's JAR file as a resource.

If you do want to read it out of a resource, then you use something like the following. (This is just off the top of my head, so complete untested!)

InputStream istream = null;

String contents = null;

try {

istream = getClass().getResourceAsStream(new URL("blah/blah"));

InputStreamReader rdr = new InputStreamReader(istream);

char[] buf = new char[8000];

int size = rdr.read(buf, 0, 8000);

= String.valueOf(buf, 0, size);

} finally {

if (istream != null) {

istream.close();

}

if (contents != null) {

tclInterp.execute(contents);

}

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AmeyaB ♦ PaulD commented · Feb 26, 2010 at 09:50 PM

Another solution would be to copy the Tcl file to a temporary folder, and then source it from there.

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anadgoud AmeyaB ♦ commented · Feb 27, 2010 at 12:52 PM

Ameya,

If we follow your solutions then probably we also need to make sure that TCLLIBPATH enviroment variable has this path. How do we control it.

Regards

anadgouda

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KumarS anadgoud commented · Feb 28, 2010 at 08:42 PM

You should be able to set the "auto_path" variable inside your tcl shell. "auto_path" variable is what contains the TCLLIBPATH value inside a tcl shell. Just add your path to this variable and everything should work.

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PaulD anadgoud commented · Feb 28, 2010 at 09:22 PM

Note that if you provide a full path to the file you want to source, it doesn't have to be in the Tcl path.

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anadgoud PaulD commented · Mar 01, 2010 at 03:49 AM

Thank you all for the advise. Copying file to temp folder and giving full path in source makes sense to me.

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AmeyaB ♦ anadgoud commented · Mar 01, 2010 at 07:40 PM

Just ensure you cleanup after yourself, by deleting the temp file once done.

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anadgoud PaulD commented · Feb 27, 2010 at 12:48 PM

Thanks.

0 ·

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