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Using the JmDNS provider (newbie questions) [message #603516]

Sat, 29 April 2006 17:17

Ronald Pomeroy

Messages: 3
Registered: July 2009

Junior Member

Ok, I'm just getting started with the ECF. Actually, I'm trying to use
it because I spotted the JmDNS stuff. Awhile back I started to write my
own set of (wrapper) plugins to provide an Eclipse-centric (IAdaptable
and extension based) API for service discovery. Once I found the ECF I
decided I should avoid re-inventing the wheel.

So I'm trying to write the SWT equivalent of the Swing-based service
browser buried in the JmDNS jar. My local environment (G5 with multiple
Airport Extremes and Airport Express') has many Bonjour enabled
services advertised (The Swing service browser shows a fairly healthy
number of services). I'm using the following code just to get some of
the mechanics down but I'm not seeing any events firing

public void start(BundleContext context) throws Exception {
super.start(context);
System.out.println("Starting...");
container =
ContainerFactory.getDefault().createContainer("ecf.discovery.jmdns ");
IDiscoveryContainer discoveryContainer =
(IDiscoveryContainer)container.getAdapter(IDiscoveryContaine r.class);
Namespace namespace =
IDFactory.getDefault().getNamespaceByName("zeroconf.jmdns");
ID id = IDFactory.getDefault().createID(namespace, "_http._tcp");
IServiceTypeListener listener = new ServiceTypeListener();
discoveryContainer.addServiceTypeListener(listener);
System.out.print("About to connect...");
((IContainer)discoveryContainer).connect(null, null);
System.out.println("connected");
System.out.println("Getting services...");
IServiceInfo[] services = discoveryContainer.getServices((ServiceID) id);
for (int i = 0; i < services.length; i++) {
IServiceInfo info = services[i];
System.out.println(info.getServiceURI());
}
System.out.println("Finished getting services");
}

Other notes:
• The ServiceTypeListener just logs events to System.out. It never gets
an event.
• I get the plugin to start by opening a view associated with the
plugin (this code IS run).
• I've tried connect(null, null) as well as connect(id, null) to no avail
• I'm guessing a bit on the "_http._tcp" bit - the docs are pretty thin
on how to do service browsing JmDNS style

Any pointers are greatly appreciated.

--
Thanks,

Ron
rpomeroy at mac.com

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Re: Using the JmDNS provider (newbie questions) [message #603521 is a reply to message #603516]

Sat, 29 April 2006 19:48

Scott Lewis

Messages: 1038
Registered: July 2009

Senior Member

This is a multi-part message in MIME format.
--------------000000060508040801090407
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Content-Transfer-Encoding: 8bit

Hi Ronald,

My apologies for the dearth of examples. As it turns out I was working
on some example discovery code this very day. Attached to this posting
is a Discovery class that you can use that puts its output on System.out.

I've also checked in this class to the org.eclipse.ecf.example.collab
plugin in the org.eclipse.ecf.example.start package.

Thanks,

Scott

Ronald Pomeroy wrote:
> Ok, I'm just getting started with the ECF. Actually, I'm trying to
> use it because I spotted the JmDNS stuff. Awhile back I started to
> write my own set of (wrapper) plugins to provide an Eclipse-centric
> (IAdaptable and extension based) API for service discovery. Once I
> found the ECF I decided I should avoid re-inventing the wheel.
>
> So I'm trying to write the SWT equivalent of the Swing-based service
> browser buried in the JmDNS jar. My local environment (G5 with
> multiple Airport Extremes and Airport Express') has many Bonjour
> enabled services advertised (The Swing service browser shows a fairly
> healthy number of services). I'm using the following code just to get
> some of the mechanics down but I'm not seeing any events firing
>
> public void start(BundleContext context) throws Exception {
> super.start(context); System.out.println("Starting..."); container =
>
> ContainerFactory.getDefault().createContainer("ecf.discovery.jmdns ");
> IDiscoveryContainer discoveryContainer =
> (IDiscoveryContainer)container.getAdapter(IDiscoveryContaine r.class);
> Namespace namespace =
> IDFactory.getDefault().getNamespaceByName("zeroconf.jmdns"); ID id =
> IDFactory.getDefault().createID(namespace, "_http._tcp");
> IServiceTypeListener listener = new ServiceTypeListener();
> discoveryContainer.addServiceTypeListener(listener);
> System.out.print("About to connect...");
> ((IContainer)discoveryContainer).connect(null, null);
> System.out.println("connected"); System.out.println("Getting
> services..."); IServiceInfo[] services =
> discoveryContainer.getServices((ServiceID) id); for (int i = 0; i <
> services.length; i++) { IServiceInfo info = services[i];
> System.out.println(info.getServiceURI()); }
> System.out.println("Finished getting services"); }
>
> Other notes: • The ServiceTypeListener just logs events to
> System.out. It never gets an event. • I get the plugin to start by
> opening a view associated with the plugin (this code IS run). • I've
> tried connect(null, null) as well as connect(id, null) to no avail •
> I'm guessing a bit on the "_http._tcp" bit - the docs are pretty thin
> on how to do service browsing JmDNS style
>
> Any pointers are greatly appreciated.
>

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