Package tigase.cluster.strategy

Class DefaultClusteringStrategyAbstract<E extends ConnectionRecordIfc>

java.lang.Object

tigase.cluster.strategy.DefaultClusteringStrategyAbstract<E>

All Implemented Interfaces:

ClusteringStrategyIfc<E>, StatisticHolder, OnlineJidsReporter

Direct Known Subclasses:

DefaultClusteringStrategy

public abstract class DefaultClusteringStrategyAbstract<E extends ConnectionRecordIfc>
extends Object
implements ClusteringStrategyIfc<E>

Created: May 13, 2009 9:53:44 AM

Author:

Artur Hefczyc

Field Summary

Fields

Modifier and Type	Field	Description
protected ClusterControllerIfc	cluster
protected String	comp
protected EventBus	eventBus
protected String	prefix
protected SessionManagerClusteredIfc	sm

Constructor Summary

Constructors

Constructor	Description
DefaultClusteringStrategyAbstract()

Method Summary

Modifier and Type	Method	Description
void	addCommandListener(CommandListener cmd)
boolean	containsJid(BareJID jid)	The method checks whether the given JID is known to the installation, either user connected to local machine or any of the cluster nodes.
boolean	containsJidLocally(BareJID jid)	The method checks whether the given JID is known to local cluster node as connected user.
boolean	containsJidLocally(JID jid)	The method checks whether the given JID is known to local cluster node as connected user.
void	everyHour()
void	everyMinute()
void	everySecond()
void	fireEvent(Object event)
JID[]	getConnectionIdsForJid(BareJID jid)	Retrieve all connection IDs (CIDs) for the given user.
E	getConnectionRecord(JID jid)	Returns a ConnectionRecord object associated with this user's full JID if it exists in the cache or null if it does not.
E	getConnectionRecordInstance()
Set<E>	getConnectionRecords(BareJID bareJID)	Returns a set with all ConnectionRecords found in the cache for a given user ID, that is BareJID.
Map<String,Object>	getDefaults(Map<String,Object> params)	This method is used for configuration purpose.
String	getInfo()
List<JID>	getNodesConnected()	The method returns all cluster nodes currently connected to the cluster node.
List<JID>	getNodesForIqResponse(Packet packet)
List<JID>	getNodesForPacketForward(JID fromNode, Set<JID> visitedNodes, Packet packet)
SessionManagerClusteredIfc	getSM()
void	getStatistics(String compName, StatisticsList list)
void	getStatistics(StatisticsList list)	Add the strategy statistics to the List.
void	handleLocalPacket(Packet packet, XMPPResourceConnection conn)
void	handleLocalPresenceSet(XMPPResourceConnection conn)
void	handleLocalResourceBind(XMPPResourceConnection conn)
void	handleLocalUserChangedConnId(BareJID userId, XMPPResourceConnection conn, JID oldConnId, JID newConnId)
void	handleLocalUserLogin(BareJID userId, XMPPResourceConnection conn)
void	handleLocalUserLogout(BareJID userId, XMPPResourceConnection conn)
boolean	hasCompleteJidsInfo()	Method checks whether the clustering strategy has a complete JIDs info.
boolean	isIqResponseToNode(Packet packet)
protected boolean	isSuitableForForward(Packet packet)
void	nodeConnected(JID node)	This is a handler method which is called when a new node connects to the cluster.
void	nodeDisconnected(JID node)	This is a handler method which is called when a node disconnects from the cluster.
boolean	processPacket(Packet packet, XMPPResourceConnection conn)
boolean	sendToNextNode(JID fromNode, Set<JID> visitedNodes, Map<String,String> data, Packet packet)	Method attempts to send the packet to the next cluster node.
void	setClusterController(ClusterControllerIfc clComp)
void	setProperties(Map<String,Object> props)	Method used to pass configuration parameters to the class.
void	setStatisticsPrefix(String prefix)
void	statisticExecutedIn(long executionTime)
String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

cluster

@Inject
protected ClusterControllerIfc cluster

comp

protected String comp

eventBus

@Inject
protected EventBus eventBus

prefix

protected String prefix

sm

@Inject
protected SessionManagerClusteredIfc sm

Constructor Detail

DefaultClusteringStrategyAbstract

public DefaultClusteringStrategyAbstract()

Method Detail

statisticExecutedIn

public void statisticExecutedIn(long executionTime)

Specified by:

statisticExecutedIn in interface StatisticHolder

everyHour

public void everyHour()

Specified by:

everyHour in interface StatisticHolder

everyMinute

public void everyMinute()

Specified by:

everyMinute in interface StatisticHolder

everySecond

public void everySecond()

Specified by:

everySecond in interface StatisticHolder

getStatistics

public void getStatistics(String compName,
                          StatisticsList list)

Specified by:

getStatistics in interface StatisticHolder

setStatisticsPrefix

public void setStatisticsPrefix(String prefix)

Specified by:

setStatisticsPrefix in interface StatisticHolder

addCommandListener

public final void addCommandListener(CommandListener cmd)

containsJid

public boolean containsJid(BareJID jid)

Description copied from interface: OnlineJidsReporter

The method checks whether the given JID is known to the installation, either user connected to local machine or any of the cluster nodes. False result does not mean the user is not connected. It means the method does not know anything about the JID. Some clustering strategies may not cache online users information.

Specified by:

containsJid in interface OnlineJidsReporter

Parameters:

jid - a user's JID for whom we query information.

Returns:

true if the user is known as online to the installation, false if the method does not know.

containsJidLocally

public boolean containsJidLocally(BareJID jid)

Description copied from interface: OnlineJidsReporter

The method checks whether the given JID is known to local cluster node as connected user. False result means that given JID is not connected to local cluster node but it may be connected to other cluster node. Result of this method should be independent of used clustering strategy.

Specified by:

containsJidLocally in interface OnlineJidsReporter

Parameters:

jid - a user's JID for whom we query information

Returns:

true if user is known as connected to local cluster node, false if it is not connected to local node

containsJidLocally

public boolean containsJidLocally(JID jid)

Description copied from interface: OnlineJidsReporter

The method checks whether the given JID is known to local cluster node as connected user. False result means that given JID is not connected to local cluster node but it may be connected to other cluster node. Result of this method should be independent of used clustering strategy.

Specified by:

containsJidLocally in interface OnlineJidsReporter

Parameters:

jid - a user's JID for whom we query information

Returns:

true if user is known as connected to local cluster node, false if it is not connected to local node

handleLocalPacket

public void handleLocalPacket(Packet packet,
                              XMPPResourceConnection conn)

Specified by:

handleLocalPacket in interface ClusteringStrategyIfc<E extends ConnectionRecordIfc>

handleLocalPresenceSet

public void handleLocalPresenceSet(XMPPResourceConnection conn)

Specified by:

handleLocalPresenceSet in interface ClusteringStrategyIfc<E extends ConnectionRecordIfc>

handleLocalResourceBind

public void handleLocalResourceBind(XMPPResourceConnection conn)

Specified by:

handleLocalResourceBind in interface ClusteringStrategyIfc<E extends ConnectionRecordIfc>

handleLocalUserLogin

public void handleLocalUserLogin(BareJID userId,
                                 XMPPResourceConnection conn)

Specified by:

handleLocalUserLogin in interface ClusteringStrategyIfc<E extends ConnectionRecordIfc>

handleLocalUserLogout

public void handleLocalUserLogout(BareJID userId,
                                  XMPPResourceConnection conn)

Specified by:

handleLocalUserLogout in interface ClusteringStrategyIfc<E extends ConnectionRecordIfc>

handleLocalUserChangedConnId

public void handleLocalUserChangedConnId(BareJID userId,
                                         XMPPResourceConnection conn,
                                         JID oldConnId,
                                         JID newConnId)

Specified by:

handleLocalUserChangedConnId in interface ClusteringStrategyIfc<E extends ConnectionRecordIfc>

processPacket

public boolean processPacket(Packet packet,
                             XMPPResourceConnection conn)

Specified by:

processPacket in interface ClusteringStrategyIfc<E extends ConnectionRecordIfc>

sendToNextNode

public boolean sendToNextNode(JID fromNode,
                              Set<JID> visitedNodes,
                              Map<String,String> data,
                              Packet packet)

Method attempts to send the packet to the next cluster node. Returns true on successful attempt and false on failure. The true result does not mean that the packet has been delivered though. Only that it was sent. The send attempt may fail if there is no more cluster nodes to send the packet or if the clustering strategy logic decided that the packet does not have to be sent.

Parameters:

packet - to be sent to a next cluster node

visitedNodes - a list of nodes already visited by the packet.

Returns:

true if the packet was sent to next cluster node and false otherwise.

toString

public String toString()

Overrides:

toString in class Object

getNodesConnected

public List<JID> getNodesConnected()

Description copied from interface: ClusteringStrategyIfc

The method returns all cluster nodes currently connected to the cluster node.

Specified by:

getNodesConnected in interface ClusteringStrategyIfc<E extends ConnectionRecordIfc>

Returns:

List of all cluster nodes currently connected to the cluster node.

getConnectionIdsForJid

public JID[] getConnectionIdsForJid(BareJID jid)

Description copied from interface: OnlineJidsReporter

Retrieve all connection IDs (CIDs) for the given user.

Specified by:

getConnectionIdsForJid in interface OnlineJidsReporter

Parameters:

jid - id of the user for which we want to retrieve the list.

Returns:

an array of JID containing all Connection IDs (CIDs) for the given user.

getConnectionRecord

public E getConnectionRecord(JID jid)

Description copied from interface: ClusteringStrategyIfc

Returns a ConnectionRecord object associated with this user's full JID if it exists in the cache or null if it does not. All parts of the user's JID are checked and ConnectionRecord is returned only if there is a match for all parts.

Specified by:

getConnectionRecord in interface ClusteringStrategyIfc<E extends ConnectionRecordIfc>

Parameters:

jid - is an instance of the user's full JID.

Returns:

ConnectionRecord instance associated with given user's JID or null if there is no ConnectionRecord in the cache.

getConnectionRecordInstance

public E getConnectionRecordInstance()

Specified by:

getConnectionRecordInstance in interface ClusteringStrategyIfc<E extends ConnectionRecordIfc>

getConnectionRecords

public Set<E> getConnectionRecords(BareJID bareJID)

Description copied from interface: ClusteringStrategyIfc

Returns a set with all ConnectionRecords found in the cache for a given user ID, that is BareJID. In other words all user's resources/connectionIDs found in the cache associated with user's account.

Specified by:

getConnectionRecords in interface ClusteringStrategyIfc<E extends ConnectionRecordIfc>

Parameters:

bareJID - is an instance of the user's BareJID, that is account ID.

Returns:

a Set instance with all ConnectionRecords found for a given BareJID. Note, the result may be null or it maybe an empty Set or non-empty set.

getDefaults

public Map<String,Object> getDefaults(Map<String,Object> params)

Description copied from interface: ClusteringStrategyIfc

This method is used for configuration purpose. Following the convention used in the Tigase project this method is supposed to provide configuration defaults. All parameters which exist in configuration file overwrite corresponding default parameters. If some parameters are missing in configuration file defaults are used then.
A compiled set of parameters is then passed to setProperties method.

Specified by:

getDefaults in interface ClusteringStrategyIfc<E extends ConnectionRecordIfc>

Parameters:

params - a Map with properties loaded from init.properties file which should be used for generating defaults.

Returns:

a Map with all the class default configuration parameters.

getInfo

public String getInfo()

Specified by:

getInfo in interface ClusteringStrategyIfc<E extends ConnectionRecordIfc>

getNodesForPacketForward

public List<JID> getNodesForPacketForward(JID fromNode,
                                          Set<JID> visitedNodes,
                                          Packet packet)

isIqResponseToNode

public boolean isIqResponseToNode(Packet packet)

getNodesForIqResponse

public List<JID> getNodesForIqResponse(Packet packet)

getStatistics

public void getStatistics(StatisticsList list)

Description copied from interface: ClusteringStrategyIfc

Add the strategy statistics to the List.

Specified by:

getStatistics in interface ClusteringStrategyIfc<E extends ConnectionRecordIfc>

hasCompleteJidsInfo

public boolean hasCompleteJidsInfo()

Description copied from interface: OnlineJidsReporter

Method checks whether the clustering strategy has a complete JIDs info. That is whether the strategy knows about all users connected to all nodes. Some strategies may choose not to share this information among nodes, hence the methods returns false. Other may synchronize this information and can provide it to further optimize cluster traffic.

Specified by:

hasCompleteJidsInfo in interface OnlineJidsReporter

Returns:

a true boolean value if the strategy has a complete information about all users connected to all cluster nodes.

nodeConnected

public void nodeConnected(JID node)

Description copied from interface: ClusteringStrategyIfc

This is a handler method which is called when a new node connects to the cluster.

Specified by:

nodeConnected in interface ClusteringStrategyIfc<E extends ConnectionRecordIfc>

Parameters:

node - is a cluster node id.

nodeDisconnected

public void nodeDisconnected(JID node)

Description copied from interface: ClusteringStrategyIfc

This is a handler method which is called when a node disconnects from the cluster.

Specified by:

nodeDisconnected in interface ClusteringStrategyIfc<E extends ConnectionRecordIfc>

Parameters:

node - is a cluster node id.

setClusterController

public void setClusterController(ClusterControllerIfc clComp)

Specified by:

setClusterController in interface ClusteringStrategyIfc<E extends ConnectionRecordIfc>

setProperties

public void setProperties(Map<String,Object> props)

Description copied from interface: ClusteringStrategyIfc

Method used to pass configuration parameters to the class. Parameters are stored in Map which contains compiles set of defaults overwritten by parameters loaded from configuration file.
If he implementation took a good care of providing defaults for all parameters no parameter should be missing.

Specified by:

setProperties in interface ClusteringStrategyIfc<E extends ConnectionRecordIfc>

Parameters:

props - a Map with all configuration parameters for the class.

getSM

public SessionManagerClusteredIfc getSM()

fireEvent

public void fireEvent(Object event)

isSuitableForForward

protected boolean isSuitableForForward(Packet packet)