How to use Bonjour in Java The slides show you how to create bonjour based services on server site and use them on client site. All examples are completely written in Java.

1. Port
Example
@hendrikEbbers
www.guigarage.com
hendrik.ebbers@web.de
Bonjour
Don‘t be afraid no
French today

2. Content
• ZeroConf & Bonjour
• AirPlay
• Java API
• Demos
keep your
fingers crossed
for me

3. HomeAutomationModule
Welcome,
please configure your Home Automation Server:
IP-Adress
Port
ok
Example
Spooky,
isn‘t it?
ANTIPATTERN!!

4. HomeAutomationModule
Hi,
please choose your Home Automation Server:
ok
HA Server living room (12.0.0.34:9001)
My Server pool house (12.0.0.31:9001)
This is how it goes
Cool,
isn‘t it?

5. ZeroConf
• methodology and set of special technologies
• automatically create a usable computer network
• assign numeric network addresses to devices
• distribution and resolution of hostnames
• location of network services

6. Bonjour
• Based on ZeroConf
• provides a general method to discover services
on a local area network
• Used in many tools & applications
• Open Source
postgreSQL,
Adobe Creative
Suite, Skype
...

7. Airplay
• Default Services based on Bonjour
• Stream Music, Movies & Photos from iOS
to AppleTV
• No configuration needed
Find this icon on
your iDevice
User has
time for
other stuff

8. Defining a Service
• Each service has a type that is defined by a
namespace
• „_servicetype._tcp.local.“
• Each service has a name
• Each service has a host and a port
• Services can have descriptions and other properties

9. • iOS Devices can stream Photos to AppleTV
• Communication is based on Bonjour & REST
• Find AirPlay Server with Bonjour
• Send pictures with REST call
Stream Photos
REST call

10. Stream Music
• iOS Devices can stream Music to AppleTV
• Same Workflow as with pictures
• _airplay._tcp.local.
• Communication is completely based on REST
default service
type for
Airplay
... and
documented in
the web

11. JmDNS
• Java implementation of multi-cast DNS
• fully compatible with Apple's Bonjour
• provide simple ways for services to register
themselves
• discover multicast DNS based services
http://jmdns.sourceforge.net

12. Listen to a Service
JmDNS jmDNS = JmDNS.create();
jmDNS.addServiceListener("name._tcp.local.", new ServiceListener()
{
@Override
! ! ! public void serviceAdded(ServiceEvent event) {...}
! ! ! @Override
! ! ! public void serviceResolved(ServiceEvent event) {...}
! ! ! @Override
! ! ! public void serviceRemoved(ServiceEvent event) {...}
}
);
create Context
listener
concept
lifecylce
wraps all infos

13. Listen to a Service
@Override
public void serviceResolved(ServiceEvent event) {
! System.out.println("Type:" + event.getType());
! System.out.println("Name:" + event.getName());
! ! ! !
! System.out.println("IP:" + event.getInfo().getHostAddress());
! System.out.println("Port:" + event.getInfo().getPort());
! System.out.println("Name:" + event.getInfo().getName());
! System.out.println("Desc:" + event.getInfo().getNiceTextString());
! System.out.println("Entry Point:" + event.getInfo().getURL());
}
optional properties

14. Create a Service
JmDNS jmDNS = JmDNS.create();
ServiceInfo info = ServiceInfo.create("_demo1._tcp.local.",
"Demo 1",
9090,
"I‘m a demo");
jmDNS.registerService(info);
create Context
register on network
type, name, port,
description

15. Example
//Server
RestServer server = new RestServer();
server.startMp3Player(„/play“, 9090);
JmDNS jmDNS = JmDNS.create();
ServiceInfo info = ServiceInfo.create("playmp3._tcp.local.",
"MP3 Player",
9090,
"play a mp3 file");
jmDNS.registerService(info);
//Client
jmDNS.addServiceListener("playmp3._tcp.local.", new ServiceListener()
{
@Override
! ! ! public void serviceAdded(ServiceEvent event) {
RestClient.play(„tuut.mp3“, event, „/play“);
}
});
create REST Server
create DNS Service
REST Call

16. REST
• Implement your services as REST WS
• Client only needs to know the URL path
• I usedVert.x
You can use
any REST API
Cause it`s cool

17. Port
Example
Demo
Time

18. Port
Example
Thanks for
watching
@hendrikEbbers
www.guigarage.com
hendrik.ebbers@web.de
Thanks
for
watching