About XMPP

The Extensible Messaging and Presence Protocol (XMPP) is an open technology for real-time communication, which powers a wide range of applications including instant messaging, presence, multi-party chat, voice and video calls, collaboration, lightweight middleware, content syndication, and generalized routing of XML data.

All offices now days use some kind of instant messaging system to keep in contact with members of staff & clients. In our Office we use Jabber & Pidgin.

Using the Smack API we can build a Java application which works in the same way as these popular XMPP clients. This opens up all kinds of possibilities. I am currently working on a bot which will take incoming commands from anyone in the office and in turn perform tasks such as querying a database and returning information.

To begin, download the Smack API from here:

Ignite Realtime: Smack API

Once you have the Smack API downloaded to your computer. Extract all the .jar files.

You now need to include these jar files into your project.

If you use Eclipse you can follow these instructions:

Right click your project > Properties > Java Build Path > Add External Jars.

Now we have the Smack API included within our project, we can start to use the API.

Create a new class called JabberSmackAPI and add the below code. Make sure you update the parts in bold.


When you run this code the Smack Debug window will show.



For more information on what this does and how to use it, see:

Smack: Debugging - Jive Software

The code will then print a list of available contacts. You can select who to talk to and start sending messages to that person.

Here is an example console output:

This is a very simple example of how to use the Smack API. It's a good base for writing your own XMPP client.

For help and a more in depth explanation, see the documentation that comes with the Smack API.

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hello ,

i am using netbeans 6.5.1 and i have added

smack.jar
smackx.jar
smackx-debug.jar
smackx-jingle.jar

to my project and tried to compile your code

i am getting class not found error in the line below
Can you help me with that please.. THX

Hello osmankamil, welcome to the forums.

Sorry, that error was my fault.

Should be:

I have updated the code example so it should be fixed. Please try again.

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I have easily created 2 users with openfire.
I am using pidgin as one of my clients and your example code for the other client.

My question is about the way XMPP works , should i get permission from a client to be added to his/her list ? Because i can not send any messages to my account which is logged in from pidgin even it looks online when i check from openfire admin console.

I tried using two pidgin softwares , and tried to add each other as buddies. But no request was sent from one to another. However if i make both my account to join a chat room . They can see and talk to each other.

Any help would be appriciated.
Thanks

Hello osmankamil.

To be honest, I am not all that familiar with XMPP. We use Pidgin here at work but I am not responsible for creating or managing accounts. I started messing around with the Java Smack API because someone else here was working on a PHP version.

I know the client does work because I have used it to send messages to another Pidgin user who was already on my list. I haven't adding a new user myself.

I'm thinking this problem could be because you are running 2 clients on the same PC? Have you tried messaging the Pidgin client on another machine?

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I tried running the sample above with openfire installed in the same machine but I got this result...

The console is listening to the following address:

http://<computer_id>:9090
https://<computer_id>:9091

I tried using the address, 127.0.0.1 and localhost but all return errors... I am not sure what went wrong...

how to add new buddyes to my list of friends? Thanks

Did you use the above code example exactly? If not, please post your version.

It must be down to the XMPP configuration

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Did anybody had this problem: I can communicate from client to client in both ways, but i always see that my smack client is NOT AUTHORIZED (my second client is Pidgin client)...why is that? please help. Thank you!!!

Try putting the server location where it says Work in the code.

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