org.apache.ignite.spi.discovery.tcp.ipfinder.multicast

Class TcpDiscoveryMulticastIpFinder

java.lang.Object

org.apache.ignite.spi.discovery.tcp.ipfinder.TcpDiscoveryIpFinderAdapter

org.apache.ignite.spi.discovery.tcp.ipfinder.vm.TcpDiscoveryVmIpFinder

org.apache.ignite.spi.discovery.tcp.ipfinder.multicast.TcpDiscoveryMulticastIpFinder

All Implemented Interfaces:

TcpDiscoveryIpFinder

public class TcpDiscoveryMulticastIpFinder
extends TcpDiscoveryVmIpFinder

Multicast-based IP finder.

When TCP discovery starts this finder sends multicast request and waits for some time when others nodes reply to this request with messages containing their addresses (time IP finder waits for response and number of attempts to re-send multicast request in case if no replies are received can be configured, see setResponseWaitTime(int) and setAddressRequestAttempts(int)).

In addition to address received via multicast this finder can work with pre-configured list of addresses specified via TcpDiscoveryVmIpFinder.setAddresses(Collection) method.

Configuration

Mandatory

There are no mandatory configuration parameters.

Optional

• Multicast IP address (see setMulticastGroup(String)).
• Multicast port number (see setMulticastPort(int)).
• Address response wait time (see setResponseWaitTime(int)).
• Address request attempts (see setAddressRequestAttempts(int)).
• Pre-configured addresses (see TcpDiscoveryVmIpFinder.setAddresses(Collection))
• Local address (see setLocalAddress(String))

Field Summary

Fields

Modifier and Type	Field and Description
static int	DFLT_ADDR_REQ_ATTEMPTS Default number of attempts to send multicast address request (value is 2).
static String	DFLT_MCAST_GROUP Default multicast IP address (value is 228.1.2.4).
static int	DFLT_MCAST_PORT Default multicast port number (value is 47400).
static int	DFLT_RES_WAIT_TIME Default time IP finder waits for reply to multicast address request (value is 500).

Fields inherited from class org.apache.ignite.spi.discovery.tcp.ipfinder.TcpDiscoveryIpFinderAdapter

ignite

Constructor Summary

Constructors

Constructor and Description
TcpDiscoveryMulticastIpFinder() Constructs new IP finder.

Method Summary

Modifier and Type	Method and Description
void	close() Closes this IP finder and releases any system resources associated with it.
int	getAddressRequestAttempts() Gets number of attempts to send multicast address request.
String	getLocalAddress() Gets local address that multicast IP finder uses.
String	getMulticastGroup() Gets IP address of multicast group.
int	getMulticastPort() Gets port number which multicast messages are sent to.
Collection<InetSocketAddress>	getRegisteredAddresses() Gets all addresses registered in this finder.
int	getResponseWaitTime() Gets time in milliseconds IP finder waits for reply to multicast address request.
int	getTimeToLive() Set the default time-to-live for multicast packets sent out on this IP finder.
void	initializeLocalAddresses(Collection<InetSocketAddress> addrs) Initializes addresses discovery SPI binds to.
void	onSpiContextInitialized(IgniteSpiContext spiCtx) Callback invoked when SPI context is initialized after TcpDiscoverySpi.spiStart(String) method is completed, SPI context can be stored for future access.
TcpDiscoveryMulticastIpFinder	setAddressRequestAttempts(int addrReqAttempts) Sets number of attempts to send multicast address request.
TcpDiscoveryMulticastIpFinder	setLocalAddress(String locAddr) Sets local host address used by this IP finder.
TcpDiscoveryMulticastIpFinder	setMulticastGroup(String mcastGrp) Sets IP address of multicast group.
TcpDiscoveryMulticastIpFinder	setMulticastPort(int mcastPort) Sets port number which multicast messages are sent to.
TcpDiscoveryMulticastIpFinder	setResponseWaitTime(int resWaitTime) Sets time in milliseconds IP finder waits for reply to multicast address request.
TcpDiscoveryMulticastIpFinder	setShared(boolean shared) Sets shared flag.
TcpDiscoveryMulticastIpFinder	setTimeToLive(int ttl) Set the default time-to-live for multicast packets sent out on this IP finder in order to control the scope of the multicast.
String	toString()

Methods inherited from class org.apache.ignite.spi.discovery.tcp.ipfinder.vm.TcpDiscoveryVmIpFinder

registerAddresses, setAddresses, unregisterAddresses

Methods inherited from class org.apache.ignite.spi.discovery.tcp.ipfinder.TcpDiscoveryIpFinderAdapter

discoveryClientMode, isShared, onSpiContextDestroyed, spiContext

Methods inherited from class java.lang.Object

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

Field Detail

DFLT_MCAST_GROUP

public static final String DFLT_MCAST_GROUP

Default multicast IP address (value is 228.1.2.4).

See Also:

Constant Field Values

DFLT_MCAST_PORT

public static final int DFLT_MCAST_PORT

Default multicast port number (value is 47400).

See Also:

Constant Field Values

DFLT_RES_WAIT_TIME

public static final int DFLT_RES_WAIT_TIME

Default time IP finder waits for reply to multicast address request (value is 500).

See Also:

Constant Field Values

DFLT_ADDR_REQ_ATTEMPTS

public static final int DFLT_ADDR_REQ_ATTEMPTS

Default number of attempts to send multicast address request (value is 2).

See Also:

Constant Field Values

Constructor Detail

TcpDiscoveryMulticastIpFinder

public TcpDiscoveryMulticastIpFinder()

Constructs new IP finder.

Method Detail

setMulticastGroup

@IgniteSpiConfiguration(optional=true)
public TcpDiscoveryMulticastIpFinder setMulticastGroup(String mcastGrp)

Sets IP address of multicast group.

If not provided, default value is DFLT_MCAST_GROUP.

Parameters:

mcastGrp - Multicast IP address.

Returns:

this for chaining.

getMulticastGroup

public String getMulticastGroup()

Gets IP address of multicast group.

Returns:

Multicast IP address.

setMulticastPort

@IgniteSpiConfiguration(optional=true)
public TcpDiscoveryMulticastIpFinder setMulticastPort(int mcastPort)

Sets port number which multicast messages are sent to.

If not provided, default value is DFLT_MCAST_PORT.

Parameters:

mcastPort - Multicast port number.

Returns:

this for chaining.

getMulticastPort

public int getMulticastPort()

Gets port number which multicast messages are sent to.

Returns:

Port number.

setResponseWaitTime

@IgniteSpiConfiguration(optional=true)
public TcpDiscoveryMulticastIpFinder setResponseWaitTime(int resWaitTime)

Sets time in milliseconds IP finder waits for reply to multicast address request.

If not provided, default value is DFLT_RES_WAIT_TIME.

Parameters:

resWaitTime - Time IP finder waits for reply to multicast address request.

Returns:

this for chaining.

getResponseWaitTime

public int getResponseWaitTime()

Gets time in milliseconds IP finder waits for reply to multicast address request.

Returns:

Time IP finder waits for reply to multicast address request.

setAddressRequestAttempts

@IgniteSpiConfiguration(optional=true)
public TcpDiscoveryMulticastIpFinder setAddressRequestAttempts(int addrReqAttempts)

Sets number of attempts to send multicast address request. IP finder re-sends request only in case if no reply for previous request is received.

If not provided, default value is DFLT_ADDR_REQ_ATTEMPTS.

Parameters:

addrReqAttempts - Number of attempts to send multicast address request.

Returns:

this for chaining.

getAddressRequestAttempts

public int getAddressRequestAttempts()

Gets number of attempts to send multicast address request. IP finder re-sends request only in case if no reply for previous request is received.

Returns:

Number of attempts to send multicast address request.

setLocalAddress

@IgniteSpiConfiguration(optional=true)
public TcpDiscoveryMulticastIpFinder setLocalAddress(String locAddr)

Sets local host address used by this IP finder. If provided address is non-loopback then multicast socket is bound to this interface. If local address is not set or is any local address then IP finder creates multicast sockets for all found non-loopback addresses.

If not provided then this property is initialized by the local address set in TcpDiscoverySpi configuration.

Parameters:

locAddr - Local host address.

Returns:

this for chaining.

See Also:

TcpDiscoverySpi.setLocalAddress(String)

getLocalAddress

public String getLocalAddress()

Gets local address that multicast IP finder uses.

Returns:

Local address.

setTimeToLive

@IgniteSpiConfiguration(optional=true)
public TcpDiscoveryMulticastIpFinder setTimeToLive(int ttl)

Set the default time-to-live for multicast packets sent out on this IP finder in order to control the scope of the multicast.

The TTL has to be in the range 0 <= TTL <= 255.

If TTL is 0, packets are not transmitted on the network, but may be delivered locally.

Default value is -1 which corresponds to system default value.

Parameters:

ttl - Time to live.

Returns:

this for chaining.

getTimeToLive

public int getTimeToLive()

Set the default time-to-live for multicast packets sent out on this IP finder.

Returns:

Time to live.

initializeLocalAddresses

public void initializeLocalAddresses(Collection<InetSocketAddress> addrs)
                              throws IgniteSpiException

Initializes addresses discovery SPI binds to.

Specified by:

initializeLocalAddresses in interface TcpDiscoveryIpFinder

Overrides:

initializeLocalAddresses in class TcpDiscoveryIpFinderAdapter

Parameters:

addrs - Addresses discovery SPI binds to.

Throws:

IgniteSpiException - In case of error.

onSpiContextInitialized

public void onSpiContextInitialized(IgniteSpiContext spiCtx)
                             throws IgniteSpiException

Callback invoked when SPI context is initialized after TcpDiscoverySpi.spiStart(String) method is completed, SPI context can be stored for future access.

Specified by:

onSpiContextInitialized in interface TcpDiscoveryIpFinder

Overrides:

onSpiContextInitialized in class TcpDiscoveryIpFinderAdapter

Parameters:

spiCtx - Spi context.

Throws:

IgniteSpiException - In case of error.

getRegisteredAddresses

public Collection<InetSocketAddress> getRegisteredAddresses()

Gets all addresses registered in this finder.

Specified by:

getRegisteredAddresses in interface TcpDiscoveryIpFinder

Overrides:

getRegisteredAddresses in class TcpDiscoveryVmIpFinder

Returns:

All known addresses, potentially empty, but never null.

close

public void close()

Closes this IP finder and releases any system resources associated with it.

Specified by:

close in interface TcpDiscoveryIpFinder

Overrides:

close in class TcpDiscoveryIpFinderAdapter

setShared

public TcpDiscoveryMulticastIpFinder setShared(boolean shared)

Sets shared flag. If true then it is expected that IP addresses registered with IP finder will be seen by IP finders on all other nodes.

Overrides:

setShared in class TcpDiscoveryVmIpFinder

Parameters:

shared - true if this IP finder is shared.

Returns:

this for chaining.

toString

public String toString()

Overrides:

toString in class TcpDiscoveryVmIpFinder