mirror of
https://codeberg.org/Mercury-IM/Smack
synced 2024-11-27 00:32:07 +01:00
162 lines
5.2 KiB
Markdown
162 lines
5.2 KiB
Markdown
Roster Item Exchange
|
|
====================
|
|
|
|
[Back](index.md)
|
|
|
|
This extension is used to send rosters, roster groups and roster entries from
|
|
one XMPP Entity to another. It also provides an easy way to hook up custom
|
|
logic when entries are received from other XMPP clients.
|
|
|
|
Follow these links to learn how to send and receive roster items:
|
|
|
|
* Send a complete roster
|
|
* Send a roster's group
|
|
* Send a roster's entry
|
|
* Receive roster entries
|
|
|
|
**XEP related:** [XEP-93](http://www.xmpp.org/extensions/xep-0093.html)
|
|
|
|
Send a entire roster
|
|
-------------------
|
|
|
|
**Description**
|
|
|
|
Sometimes it is useful to send a whole roster to another user. Smack provides
|
|
a very easy way to send a complete roster to another XMPP client.
|
|
|
|
**Usage**
|
|
|
|
Create an instance of _**RosterExchangeManager**_ and use the **#send(Roster,
|
|
String)** message to send a roster to a given user. The first parameter is the
|
|
roster to send and the second parameter is the id of the user that will
|
|
receive the roster entries.
|
|
|
|
**Example**
|
|
|
|
In this example we can see how user1 sends his roster to user2.
|
|
|
|
```
|
|
XMPPConnection conn1 = …
|
|
|
|
// Create a new roster exchange manager on conn1
|
|
RosterExchangeManager rosterExchangeManager = new RosterExchangeManager(conn1);
|
|
// Send user1's roster to user2
|
|
rosterExchangeManager.send(Roster.getInstanceFor(conn1), user2);
|
|
```
|
|
|
|
Send a roster group
|
|
-------------------
|
|
|
|
**Description**
|
|
|
|
It is also possible to send a roster group to another XMPP client. A roster
|
|
group groups a set of roster entries under a name.
|
|
|
|
**Usage**
|
|
|
|
Create an instance of _**RosterExchangeManager**_ and use the
|
|
**#send(RosterGroup, String)** message to send a roster group to a given user.
|
|
The first parameter is the roster group to send and the second parameter is
|
|
the id of the user that will receive the roster entries.
|
|
|
|
**Example**
|
|
|
|
In this example we can see how user1 sends his roster groups to user2.
|
|
|
|
```
|
|
XMPPConnection conn1 = …
|
|
|
|
// Create a new roster exchange manager on conn1
|
|
RosterExchangeManager rosterExchangeManager = new RosterExchangeManager(conn1);
|
|
// Send user1's RosterGroups to user2
|
|
for (Iterator it = Roster.getInstanceFor(conn1).getGroups(); it.hasNext(); )
|
|
rosterExchangeManager.send((RosterGroup)it.next(), user2);
|
|
```
|
|
|
|
Send a roster entry
|
|
-------------------
|
|
|
|
**Description**
|
|
|
|
Sometimes you may need to send a single roster entry to another XMPP client.
|
|
Smack also lets you send items at this granularity level.
|
|
|
|
**Usage**
|
|
|
|
Create an instance of _**RosterExchangeManager**_ and use the
|
|
**#send(RosterEntry, String)** message to send a roster entry to a given user.
|
|
The first parameter is the roster entry to send and the second parameter is
|
|
the id of the user that will receive the roster entries.
|
|
|
|
**Example**
|
|
|
|
In this example we can see how user1 sends a roster entry to user2.
|
|
|
|
```
|
|
XMPPConnection conn1 = …
|
|
|
|
// Create a new roster exchange manager on conn1
|
|
RosterExchangeManager rosterExchangeManager = new RosterExchangeManager(conn1);
|
|
// Send a roster entry (any) to user2
|
|
rosterExchangeManager1.send((RosterEntry)Roster.getInstanceFor(conn1).getEntries().next(), user2);
|
|
```
|
|
|
|
Receive roster entries
|
|
----------------------
|
|
|
|
**Description**
|
|
|
|
Since roster items are sent between XMPP clients, it is necessary to listen to
|
|
possible roster entries receptions. Smack provides a mechanism that you can
|
|
use to execute custom logic when roster entries are received.
|
|
|
|
**Usage**
|
|
|
|
1. Create a class that implements the _**RosterExchangeListener**_ interface.
|
|
2. Implement the method **entriesReceived(String, Iterator)** that will be called when new entries are received with custom logic.
|
|
3. Add the listener to the _RosterExchangeManager_ that works on the desired _XMPPConnection_.
|
|
|
|
**Example**
|
|
|
|
In this example we can see how user1 sends a roster entry to user2 and user2
|
|
adds the received entries to his roster.
|
|
|
|
```
|
|
// Connect to the server and log in the users
|
|
XMPPConnection conn1 = …
|
|
XMPPConnection conn2 = …
|
|
|
|
final Roster user2_roster = Roster.getInstanceFor(conn2);
|
|
|
|
// Create a RosterExchangeManager that will help user2 to listen and accept
|
|
the entries received
|
|
RosterExchangeManager rosterExchangeManager2 = new RosterExchangeManager(conn2);
|
|
// Create a RosterExchangeListener that will iterate over the received roster entries
|
|
RosterExchangeListener rosterExchangeListener = new RosterExchangeListener() {
|
|
public void entriesReceived(String from, Iterator remoteRosterEntries) {
|
|
while (remoteRosterEntries.hasNext()) {
|
|
try {
|
|
// Get the received entry
|
|
RemoteRosterEntry remoteRosterEntry = (RemoteRosterEntry) remoteRosterEntries.next();
|
|
// Display the remote entry on the console
|
|
System.out.println(remoteRosterEntry);
|
|
// Add the entry to the user2's roster
|
|
user2_roster.createEntry(
|
|
remoteRosterEntry.getUser(),
|
|
remoteRosterEntry.getName(),
|
|
remoteRosterEntry.getGroupArrayNames());
|
|
}
|
|
catch (XMPPException e) {
|
|
e.printStackTrace();
|
|
}
|
|
}
|
|
}
|
|
};
|
|
// Add the RosterExchangeListener to the RosterExchangeManager that user2 is using
|
|
rosterExchangeManager2.addRosterListener(rosterExchangeListener);
|
|
|
|
// Create a RosterExchangeManager that will help user1 to send his roster
|
|
RosterExchangeManager rosterExchangeManager1 = new RosterExchangeManager(conn1);
|
|
// Send user1's roster to user2
|
|
rosterExchangeManager1.send(Roster.getInstanceFor(conn1), user2);
|
|
```
|