org.fourthline.cling.transport
Class RouterImpl

java.lang.Object
  org.fourthline.cling.transport.RouterImpl

All Implemented Interfaces:

Router

Direct Known Subclasses:

AndroidRouter

@ApplicationScoped
public class RouterImpl
extends Object
implements Router

Default implementation of network message router.

Initializes and starts listening for data on the network when enabled.

Author:

Christian Bauer

Field Summary

protected UpnpServiceConfiguration	configuration
protected Map<InetAddress,DatagramIO>	datagramIOs
protected boolean	enabled
protected Map<NetworkInterface,MulticastReceiver>	multicastReceivers
protected NetworkAddressFactory	networkAddressFactory
protected ProtocolFactory	protocolFactory
protected Lock	readLock
protected ReentrantReadWriteLock	routerLock
protected StreamClient	streamClient
protected Map<InetAddress,StreamServer>	streamServers
protected Lock	writeLock

Constructor Summary

protected	RouterImpl()
	RouterImpl(UpnpServiceConfiguration configuration, ProtocolFactory protocolFactory)

Method Summary

void	broadcast(byte[] bytes) Sends the given bytes as a broadcast on all bound DatagramIOs, using source port 9.
boolean	disable() Unbinds all sockets and stops all listening threads for datagrams and streams.
boolean	disable(DisableRouter event)
boolean	enable() Initializes listening services: First an instance of MulticastReceiver is bound to each network interface.
boolean	enable(EnableRouter event)
List<NetworkAddress>	getActiveStreamServers(InetAddress preferredAddress)
UpnpServiceConfiguration	getConfiguration()
protected int	getLockTimeoutMillis()
ProtocolFactory	getProtocolFactory()
void	handleStartFailure(InitializationException ex) Called by the Router.enable() method before it returns.
boolean	isEnabled()
protected void	lock(Lock lock)
protected void	lock(Lock lock, int timeoutMilliseconds)
void	received(IncomingDatagramMessage msg) Obtains the asynchronous protocol Executor and runs the protocol created by the ProtocolFactory for the given message.
void	received(UpnpStream stream) Obtains the synchronous protocol Executor and runs the UpnpStream directly.
void	send(OutgoingDatagramMessage msg) Sends the UDP datagram on all bound DatagramIOs.
StreamResponseMessage	send(StreamRequestMessage msg) Sends the TCP stream request with the StreamClient.
void	shutdown() Disables the router and releases all other resources.
protected void	startAddressBasedTransports(Iterator<InetAddress> addresses)
protected void	startInterfaceBasedTransports(Iterator<NetworkInterface> interfaces)
protected void	unlock(Lock lock)

Methods inherited from class java.lang.Object

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

Field Detail

configuration

protected UpnpServiceConfiguration configuration

protocolFactory

protected ProtocolFactory protocolFactory

enabled

protected volatile boolean enabled

routerLock

protected ReentrantReadWriteLock routerLock

readLock

protected Lock readLock

writeLock

protected Lock writeLock

networkAddressFactory

protected NetworkAddressFactory networkAddressFactory

streamClient

protected StreamClient streamClient

multicastReceivers

protected final Map<NetworkInterface,MulticastReceiver> multicastReceivers

datagramIOs

protected final Map<InetAddress,DatagramIO> datagramIOs

streamServers

protected final Map<InetAddress,StreamServer> streamServers

Constructor Detail

RouterImpl

protected RouterImpl()

RouterImpl

@Inject
public RouterImpl(UpnpServiceConfiguration configuration,
                         ProtocolFactory protocolFactory)

Parameters:

configuration - The configuration used by this router.

protocolFactory - The protocol factory used by this router.

Method Detail

enable

public boolean enable(@Observes@Default
                      EnableRouter event)
               throws RouterException

Throws:

RouterException

disable

public boolean disable(@Observes@Default
                       DisableRouter event)
                throws RouterException

Throws:

RouterException

getConfiguration

public UpnpServiceConfiguration getConfiguration()

Specified by:

getConfiguration in interface Router

Returns:

The configuration used by this router.

getProtocolFactory

public ProtocolFactory getProtocolFactory()

Specified by:

getProtocolFactory in interface Router

Returns:

The protocol factory used by this router.

enable

public boolean enable()
               throws RouterException

Initializes listening services: First an instance of MulticastReceiver is bound to each network interface. Then an instance of DatagramIO and StreamServer is bound to each bind address returned by the network address factory, respectively. There is only one instance of StreamClient created and managed by this router.

Specified by:

enable in interface Router

Returns:

true if the router was enabled. false if it's already running.

Throws:

RouterException

disable

public boolean disable()
                throws RouterException

Description copied from interface: Router

Unbinds all sockets and stops all listening threads for datagrams and streams.

Specified by:

disable in interface Router

Returns:

true if the router was disabled. false if it wasn't running.

Throws:

RouterException

shutdown

public void shutdown()
              throws RouterException

Description copied from interface: Router

Disables the router and releases all other resources.

Specified by:

shutdown in interface Router

Throws:

RouterException

isEnabled

public boolean isEnabled()

Specified by:

isEnabled in interface Router

Returns:

true if the router is currently enabled.

handleStartFailure

public void handleStartFailure(InitializationException ex)
                        throws InitializationException

Description copied from interface: Router

Called by the Router.enable() method before it returns.

Specified by:

handleStartFailure in interface Router

Parameters:

ex - The cause of the failure.

Throws:

InitializationException - if the exception was not recoverable.

getActiveStreamServers

public List<NetworkAddress> getActiveStreamServers(InetAddress preferredAddress)
                                            throws RouterException

Specified by:

getActiveStreamServers in interface Router

Parameters:

preferredAddress - A preferred stream server bound address or null.

Returns:

An empty list if no stream server is currently active, otherwise a single network address if the preferred address is active, or a list of all active bound stream servers.

Throws:

RouterException

received

public void received(IncomingDatagramMessage msg)

Obtains the asynchronous protocol Executor and runs the protocol created by the ProtocolFactory for the given message.

If the factory doesn't create a protocol, the message is dropped immediately without creating another thread or consuming further resources. This means we can filter the datagrams in the protocol factory and e.g. completely disable discovery or only allow notification message from some known services we'd like to work with.

Specified by:

received in interface Router

Parameters:

msg - The received datagram message.

received

public void received(UpnpStream stream)

Obtains the synchronous protocol Executor and runs the UpnpStream directly.

Specified by:

received in interface Router

Parameters:

stream - The received UpnpStream.

send

public void send(OutgoingDatagramMessage msg)
          throws RouterException

Sends the UDP datagram on all bound DatagramIOs.

Specified by:

send in interface Router

Parameters:

msg - The UDP datagram message to send.

Throws:

RouterException - if a recoverable error, such as thread interruption, occurs.

send

public StreamResponseMessage send(StreamRequestMessage msg)
                           throws RouterException

Sends the TCP stream request with the StreamClient.

Specified by:

send in interface Router

Parameters:

msg - The TCP (HTTP) stream message to send.

Returns:

The return value of the StreamClient.sendRequest(StreamRequestMessage) method or null if no StreamClient is available.

Throws:

RouterException - if a recoverable error, such as thread interruption, occurs.

broadcast

public void broadcast(byte[] bytes)
               throws RouterException

Sends the given bytes as a broadcast on all bound DatagramIOs, using source port 9.

TODO: Support source port parameter

Specified by:

broadcast in interface Router

Parameters:

bytes - The byte payload of the UDP datagram.

Throws:

RouterException - if a recoverable error, such as thread interruption, occurs.

startInterfaceBasedTransports

protected void startInterfaceBasedTransports(Iterator<NetworkInterface> interfaces)
                                      throws InitializationException

Throws:

InitializationException

startAddressBasedTransports

protected void startAddressBasedTransports(Iterator<InetAddress> addresses)
                                    throws InitializationException

Throws:

InitializationException

lock

protected void lock(Lock lock,
                    int timeoutMilliseconds)
             throws RouterException

Throws:

RouterException

lock

protected void lock(Lock lock)
             throws RouterException

Throws:

RouterException

unlock

protected void unlock(Lock lock)

getLockTimeoutMillis

protected int getLockTimeoutMillis()

Returns:

Defaults to 6 seconds, should be longer than it takes the router to be enabled/disabled.