Package org.jivesoftware.smackx.jingleold.nat

Class TransportResolver

java.lang.Object

org.jivesoftware.smackx.jingleold.nat.TransportResolver

Direct Known Subclasses:

BasicResolver, BridgedResolver, FixedResolver, ICEResolver, STUNResolver

public abstract class TransportResolver
extends Object

A TransportResolver is used for obtaining a list of valid transport candidates. A transport candidate is composed by an IP address and a port number. It is called candidate, because it can be elected or not.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static enum	TransportResolver.Type

Field Summary

Fields

Modifier and Type	Field	Description
protected final List<TransportCandidate>	candidates
static final int	CHECK_TIMEOUT
TransportResolver.Type	type

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	TransportResolver()	Default constructor.

Method Summary

Modifier and Type	Method	Description
protected void	addCandidate(TransportCandidate cand)	Add a new transport candidate
void	addListener(TransportResolverListener li)	Add a transport resolver listener.
abstract void	cancel()	Cancel any asynchronous resolution operation.
void	clear()	Clear the list of candidates and start a new resolution process.
protected void	clearCandidates()	Clear the list of candidate
TransportCandidate	getCandidate(int i)	Get the n-th candidate.
int	getCandidateCount()	Get the number of transport candidates.
Iterator<TransportCandidate>	getCandidates()	Get an iterator for the list of candidates.
List<TransportCandidate>	getCandidatesList()	Get the list of candidates.
protected int	getFreePort()	Obtain a free port we can use.
List<TransportResolverListener>	getListenersList()	Get the list of listeners.
TransportCandidate	getPreferredCandidate()	Get the candidate with the highest preference.
TransportResolver.Type	getType()
abstract void	initialize()	Initialize the Resolver.
void	initializeAndWait()	Initialize Transport Resolver and wait until it is completely uninitialized.
boolean	isInitialized()	Check if the Transport Resolver is initialized.
boolean	isResolved()	Return true if the resolver has finished the search for transport candidates.
boolean	isResolving()	Return true if the resolver is working.
void	removeListener(TransportResolverListener li)	Removes a transport resolver listener.
abstract void	resolve(JingleSession session)	Start a the resolution.
void	setInitialized()	Set the Transport Resolver as initialized.
protected void	setResolveEnd()	Indicate the end of the resolution process.
protected void	setResolveInit()	Indicate the beginning of the resolution process.
void	setType(TransportResolver.Type type)
protected void	triggerCandidateAdded(TransportCandidate cand)	Trigger a new candidate added event.

Methods inherited from class java.lang.Object

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

Field Details

type

public TransportResolver.Type type

CHECK_TIMEOUT

public static final int CHECK_TIMEOUT

See Also:

• Constant Field Values

candidates

protected final List<TransportCandidate> candidates

Constructor Details

TransportResolver

protected TransportResolver()

Default constructor.

Method Details

getType

public TransportResolver.Type getType()

setType

public void setType(TransportResolver.Type type)

initialize

public abstract void initialize()
                         throws XMPPException,
SmackException,
InterruptedException

Initialize the Resolver.

Throws:

XMPPException - if an XMPP protocol error was received.

SmackException - if Smack detected an exceptional situation.

InterruptedException - if the calling thread was interrupted.

resolve

public abstract void resolve(JingleSession session)
                      throws XMPPException,
SmackException,
InterruptedException

Start a the resolution.

Parameters:

session - the Jingle session.

Throws:

XMPPException - if an XMPP protocol error was received.

SmackException - if Smack detected an exceptional situation.

InterruptedException - if the calling thread was interrupted.

clear

public void clear()
           throws XMPPException

Clear the list of candidates and start a new resolution process.

Throws:

XMPPException - if an XMPP protocol error was received.

cancel

public abstract void cancel()
                     throws XMPPException

Cancel any asynchronous resolution operation.

Throws:

XMPPException - if an XMPP protocol error was received.

isResolving

public boolean isResolving()

Return true if the resolver is working.

Returns:

true if the resolver is working.

isResolved

public boolean isResolved()

Return true if the resolver has finished the search for transport candidates.

Returns:

true if the search has finished

setInitialized

public void setInitialized()

Set the Transport Resolver as initialized.

isInitialized

public boolean isInitialized()

Check if the Transport Resolver is initialized.

Returns:

true if initialized

setResolveInit

protected void setResolveInit()

Indicate the beginning of the resolution process. This method must be used by subclasses at the beginning of their resolve() method.

setResolveEnd

protected void setResolveEnd()

Indicate the end of the resolution process. This method must be used by subclasses at the beginning of their resolve() method.

addListener

public void addListener(TransportResolverListener li)

Add a transport resolver listener.

Parameters:

li - The transport resolver listener to be added.

removeListener

public void removeListener(TransportResolverListener li)

Removes a transport resolver listener.

Parameters:

li - The transport resolver listener to be removed

getListenersList

public List<TransportResolverListener> getListenersList()

Get the list of listeners.

Returns:

the list of listeners

triggerCandidateAdded

protected void triggerCandidateAdded(TransportCandidate cand)
                              throws SmackException.NotConnectedException,
InterruptedException

Trigger a new candidate added event.

Parameters:

cand - The candidate added to the list of candidates.

Throws:

SmackException.NotConnectedException - if the XMPP connection is not connected.

InterruptedException - if the calling thread was interrupted.

clearCandidates

protected void clearCandidates()

Clear the list of candidate

addCandidate

protected void addCandidate(TransportCandidate cand)
                     throws SmackException.NotConnectedException,
InterruptedException

Add a new transport candidate

Parameters:

cand - The candidate to add

Throws:

SmackException.NotConnectedException - if the XMPP connection is not connected.

InterruptedException - if the calling thread was interrupted.

getCandidates

public Iterator<TransportCandidate> getCandidates()

Get an iterator for the list of candidates.

Returns:

an iterator

getPreferredCandidate

public TransportCandidate getPreferredCandidate()

Get the candidate with the highest preference.

Returns:

The best candidate, according to the preference order.

getCandidateCount

public int getCandidateCount()

Get the number of transport candidates.

Returns:

The length of the transport candidates list.

getCandidatesList

public List<TransportCandidate> getCandidatesList()

Get the list of candidates.

Returns:

the list of transport candidates

getCandidate

public TransportCandidate getCandidate(int i)

Get the n-th candidate.

Parameters:

i - the index of the candidate.

Returns:

a transport candidate

initializeAndWait

public void initializeAndWait()
                       throws XMPPException,
SmackException,
InterruptedException

Initialize Transport Resolver and wait until it is completely uninitialized.

Throws:

XMPPException - if an XMPP protocol error was received.

SmackException - if Smack detected an exceptional situation.

InterruptedException - if the calling thread was interrupted.

getFreePort

protected int getFreePort()

Obtain a free port we can use.

Returns:

A free port number.