[mihini-dev] Greenhouse Demo access via m3da using the java api

[Jürgen Rose <juergen.rose@xxxxxxxxxxxxxxx>]

Hi,

I want to try to access the greenhouse demo via m3da. I actually have no 
idea how.

By the way, if you look at 
http://m2m.eclipse.org/portalTest/webapp/app/#/devices/RPI000000006f257df2, 
the values seem to be stuck, all dates are not changing from July 23rd 
00:35:29

Ok, just to explain what I tried:

As far as I understand, there is a M3DA server running on 
m2m.eclipse.org at port 44900

This is the same server which is the base for the web GUI, correct?

What I try to do, is to get the greenhouse temperature.

There I'm starting to become confused, the java client doesn't offer any 
way to subscribe to a tag.

Is it then always request/response driven? So I would have to poll for 
value changes?

I tried something like this:

public class Application
{
    public static void main ( final String[] args ) throws Exception
    {
        final M3daTcpClient client = new M3daTcpClient ( 
"m2m.eclipse.org", 44900, "openscada.org#1" );
        client.connect ();
        final M3daBodyMessage[] x = client.sendEnvelope ( 
createMessages () );
        System.out.println ( x );
        System.out.println ( x.length );
        client.close ();
    }

    private static M3daMessage[] createMessages ()
    {
        final Map<Object, Object> map = new HashMap<> ();
        map.put ( "A1", "ON" );
        return new M3daMessage[] { new M3daMessage ( "greenhouse", 
Math.abs ( new Random ().nextLong () ), map ) };
    }
}

This maybe total nonsense but I just dont find any documentation for the 
greenhouse demo, even the source code parts I managed to find, seem 
incomplete to me.

What is the path?

What is the name of the tags?

Is there a way to query/browse the server for existing tags?



Best regards
Jürgen

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