tigase.xmpp.impl

Class JabberIqRoster

java.lang.Object

tigase.xmpp.XMPPProcessor

tigase.xmpp.impl.JabberIqRoster

All Implemented Interfaces:

Comparable<XMPPImplIfc>, XMPPImplIfc, XMPPProcessorIfc

public class JabberIqRoster
extends XMPPProcessor
implements XMPPProcessorIfc

Class JabberIqRoster implements part of RFC-3921 - XMPP Instant Messaging specification describing roster management. 7. Roster Management Created: Tue Feb 21 17:42:53 2006

Version:

$Rev$

Author:

Artur Hefczyc

Field Summary

Fields

Modifier and Type	Field and Description
static String	ANON Field description
protected RosterAbstract	roster_util instance of class implementing RosterAbstract

Fields inherited from class tigase.xmpp.XMPPProcessor

ALL_NAMES, ALL_PATHS, cmpInfo

Fields inherited from interface tigase.xmpp.XMPPImplIfc

CLIENT_XMLNS

Constructor Summary

Constructors

Constructor and Description
JabberIqRoster()

Method Summary

Methods

Modifier and Type	Method and Description
int	concurrentQueuesNo() Methods returns a preferable number of threads/packets queues for the plugin.
protected static void	dynamicGetRequest(Packet packet, XMPPResourceConnection session, Queue<Packet> results, Map<String,Object> settings) Method processes roster get request related to dynamic roster.
protected static void	dynamicSetRequest(Packet packet, XMPPResourceConnection session, Queue<Packet> results, Map<String,Object> settings) Method processes roster set request related to dynamic roster.
static String[]	getItemGroups(tigase.xml.Element item) Returns an array of group names retrieved from Element item
protected RosterAbstract	getRosterUtil() Returns shared instance of class implementing RosterAbstract - either default one (RosterFlat) or the one configured with "roster-implementation" property.
String	id() Method id returns a unique ID of the plugin.
void	init(Map<String,Object> settings) Method init is called just after the plugin has been loaded into memory.
void	process(Packet packet, XMPPResourceConnection session, NonAuthUserRepository repo, Queue<Packet> results, Map<String,Object> settings) Performs processing of IQ packets with jabber:iq:roster xmlns with the regard whether it's roster set or get request or possibly dynamic-roster is involved.
protected void	processGetRequest(Packet packet, XMPPResourceConnection session, Queue<Packet> results, Map<String,Object> settings) Method processes roster get request.
protected void	processSetRequest(Packet packet, XMPPResourceConnection session, Queue<Packet> results, Map<String,Object> settings) Method processes roster set request.
tigase.xml.Element[]	supDiscoFeatures(XMPPResourceConnection session) Method supDiscoFeatures returns an array of XML Elements with service discovery features which have to be returned to the client uppon request.
String[][]	supElementNamePaths() Method supElementNamePaths returns an array of element names in form of a full path to the XML element for stanzas which can be processed by this plugin.
String[]	supNamespaces() Method supNamespaces returns an array of name-spaces for stanzas which can be processed by this plugin.
tigase.xml.Element[]	supStreamFeatures(XMPPResourceConnection session) Method supStreamFeatures returns an array of XML Elements with stream features which have to be returned to the client uppon request.
protected void	updateHash(XMPPResourceConnection session, Map<String,Object> settings) Calculates hash value based on the user roster items and saves it to user's session data.

Methods inherited from class tigase.xmpp.XMPPProcessor

canHandle, compareTo, concurrentThreadsPerQueue, getComponentInfo, getInstance, getStatistics, isSupporting, supElements, supTypes, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface tigase.xmpp.XMPPImplIfc

canHandle, concurrentThreadsPerQueue, getComponentInfo, getStatistics, isSupporting, supElements, supTypes

Methods inherited from interface java.lang.Comparable

compareTo

Field Detail

ANON

public static final String ANON

Field description

See Also:

Constant Field Values

roster_util

protected RosterAbstract roster_util

instance of class implementing RosterAbstract

Constructor Detail

JabberIqRoster

public JabberIqRoster()

Method Detail

concurrentQueuesNo

public int concurrentQueuesNo()

Description copied from interface: XMPPImplIfc

Methods returns a preferable number of threads/packets queues for the plugin. This number can be overwritten through configuration settings, however, a default value should be reasonably good for most standard installations. It is recommended to assign at least as much as twice a number of CPUs cores for I/O bound processing and number a number equal to CPUs cores for fast processing not slowed down by any I/O.

Specified by:

concurrentQueuesNo in interface XMPPImplIfc

Overrides:

concurrentQueuesNo in class XMPPProcessor

Returns:

an integer preferred number of processing threads for the plugin.

id

public String id()

Description copied from interface: XMPPImplIfc

Method id returns a unique ID of the plugin. Each plugin has own, unique ID which is used in the configuration file to determine whether it needs to be loaded or not. In most cases the ID can be equal to XMLNS of the packages processed by the plugin.

Specified by:

id in interface XMPPImplIfc

Returns:

a String value

init

public void init(Map<String,Object> settings)
          throws TigaseDBException

Description copied from interface: XMPPImplIfc

Method init is called just after the plugin has been loaded into memory. The idea behind this is to allow it to initialize or check the database. This might be especially useful for plugins which want to have a database access via non-standard stored procedures or need schema upgrade.

Specified by:

init in interface XMPPImplIfc

Overrides:

init in class XMPPProcessor

Parameters:

settings - is a Map with initial processor settings from the configuration file.

Throws:

TigaseDBException

process

public void process(Packet packet,
           XMPPResourceConnection session,
           NonAuthUserRepository repo,
           Queue<Packet> results,
           Map<String,Object> settings)
             throws XMPPException

Performs processing of IQ packets with jabber:iq:roster xmlns with the regard whether it's roster set or get request or possibly dynamic-roster is involved. request.

Specified by:

process in interface XMPPProcessorIfc

Parameters:

packet - packet is which being processed. This parameter may never be null. Even though this is not immutable object it mustn't be altered. None of it's fields or attributes can be changed during processing.

session - user session which keeps all the user session data and also gives an access to the user's repository data. It allows for storing information in a permanent storage or in memory only during the live of the online session. This parameter can be null if there is no online user session at the time of the packet processing.

repo - this is a user data storage which is normally used when the user session (parameter above) is null. This is repository allows for a very restricted access only. It allows for storing some user private data (doesn't allow overwriting existing data) like messages for offline users and it also allows for reading user public data like VCard.

results - this a collection with packets which have been generated as input packet processing results. Regardless a response to a user request is sent or the packet is forwarded to it's destination it is always required that a copy of the input packet is created and stored in the results queue.

settings - this map keeps plugin specific settings loaded from the Tigase server configuration. In most cases it is unused, however if the plugin needs to access an external database that this is a way to pass database connection string to the plugin.

Throws:

XMPPException

supDiscoFeatures

public tigase.xml.Element[] supDiscoFeatures(XMPPResourceConnection session)

Description copied from interface: XMPPImplIfc

Method supDiscoFeatures returns an array of XML Elements with service discovery features which have to be returned to the client uppon request. Service discovery features returned by this method correspond to services supported by this plugin.

Specified by:

supDiscoFeatures in interface XMPPImplIfc

Overrides:

supDiscoFeatures in class XMPPProcessor

Parameters:

session - a XMPPResourceConnection value

Returns:

an Element[] value

supElementNamePaths

public String[][] supElementNamePaths()

Description copied from interface: XMPPImplIfc

Method supElementNamePaths returns an array of element names in form of a full path to the XML element for stanzas which can be processed by this plugin. Each element name path corresponds to XMLNS returned in array by supNamespaces() method. The element path itself is represented by a String array with each path element as a separate String.

Specified by:

supElementNamePaths in interface XMPPImplIfc

Overrides:

supElementNamePaths in class XMPPProcessor

Returns:

a String[][] value is an array for element paths for which the plugin offers processing capabilities. Each path is in form of a String array in order to reduce parsing overhead.

supNamespaces

public String[] supNamespaces()

Description copied from interface: XMPPImplIfc

Method supNamespaces returns an array of name-spaces for stanzas which can be processed by this plugin. Each namespace corresponds to element name returned in array by supElemenets() method.

Specified by:

supNamespaces in interface XMPPImplIfc

Overrides:

supNamespaces in class XMPPProcessor

Returns:

a String[] value

supStreamFeatures

public tigase.xml.Element[] supStreamFeatures(XMPPResourceConnection session)

Description copied from interface: XMPPImplIfc

Method supStreamFeatures returns an array of XML Elements with stream features which have to be returned to the client uppon request. Stream features returned by this method correspond to features supported by this plugin.

Specified by:

supStreamFeatures in interface XMPPImplIfc

Overrides:

supStreamFeatures in class XMPPProcessor

Parameters:

session - a XMPPResourceConnection value

Returns:

an Element[] value

getItemGroups

public static String[] getItemGroups(tigase.xml.Element item)

Returns an array of group names retrieved from Element item

Parameters:

item - from which groups should be obtained

Returns:

an array of group names retrieved from Element item

dynamicGetRequest

protected static void dynamicGetRequest(Packet packet,
                     XMPPResourceConnection session,
                     Queue<Packet> results,
                     Map<String,Object> settings)
                                 throws NotAuthorizedException

Method processes roster get request related to dynamic roster. Generates output packet with data from the DynamicRoster implementation for every itemelement from processed packet or error otherwise.

Parameters:

packet - packet is which being processed.

session - user session which keeps all the user session data and also gives an access to the user's repository data.

results - this a collection with packets which have been generated as input packet processing results.

settings - this map keeps plugin specific settings loaded from the Tigase server configuration.

Throws:

NotAuthorizedException

dynamicSetRequest

protected static void dynamicSetRequest(Packet packet,
                     XMPPResourceConnection session,
                     Queue<Packet> results,
                     Map<String,Object> settings)

Method processes roster set request related to dynamic roster. Sets extra data for every itemelement from processed packet with the DynamicRoster implementation and generates success packet or, in case of failure generates error.

Parameters:

packet - packet is which being processed.

session - user session which keeps all the user session data and also gives an access to the user's repository data.

results - this a collection with packets which have been generated as input packet processing results.

settings - this map keeps plugin specific settings loaded from the Tigase server configuration.

processGetRequest

protected void processGetRequest(Packet packet,
                     XMPPResourceConnection session,
                     Queue<Packet> results,
                     Map<String,Object> settings)
                          throws NotAuthorizedException,
                                 TigaseDBException,
                                 RosterRetrievingException,
                                 RepositoryAccessException

Method processes roster get request. Generates output result packet containing user roster items also considering roster version attribute to minimise traffic.

Parameters:

packet - packet is which being processed.

session - user session which keeps all the user session data and also gives an access to the user's repository data.

results - this a collection with packets which have been generated as input packet processing results.

settings - this map keeps plugin specific settings loaded from the Tigase server configuration.

Throws:

NotAuthorizedException

RepositoryAccessException

RosterRetrievingException

TigaseDBException

processSetRequest

protected void processSetRequest(Packet packet,
                     XMPPResourceConnection session,
                     Queue<Packet> results,
                     Map<String,Object> settings)
                          throws XMPPException,
                                 NotAuthorizedException,
                                 TigaseDBException

Method processes roster set request. Performs modifications of user roster.

Parameters:

packet - packet is which being processed.

session - user session which keeps all the user session data and also gives an access to the user's repository data.

results - this a collection with packets which have been generated as input packet processing results.

settings - this map keeps plugin specific settings loaded from the Tigase server configuration.

Throws:

NotAuthorizedException

TigaseDBException

XMPPException

updateHash

protected void updateHash(XMPPResourceConnection session,
              Map<String,Object> settings)
                   throws NotAuthorizedException,
                          TigaseDBException,
                          RosterRetrievingException,
                          RepositoryAccessException

Calculates hash value based on the user roster items and saves it to user's session data.

Parameters:

session - user session which keeps all the user session data and also gives an access to the user's repository data.

settings - this map keeps plugin specific settings loaded from the Tigase server configuration.

Throws:

NotAuthorizedException

RepositoryAccessException

RosterRetrievingException

TigaseDBException

getRosterUtil

protected RosterAbstract getRosterUtil()

Returns shared instance of class implementing RosterAbstract - either default one (RosterFlat) or the one configured with "roster-implementation" property.

Returns:

a shared instance of class implementing RosterAbstract