org.gridgain.grid.segmentation.reachability

Class ReachabilitySegmentationResolver

java.lang.Object

org.gridgain.grid.segmentation.reachability.ReachabilitySegmentationResolver

All Implemented Interfaces:

Serializable, SegmentationResolver

public class ReachabilitySegmentationResolver
extends Object
implements SegmentationResolver

Segmentation resolver that uses address reachability to check whether node is in the correct segment or not.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static int	DFLT_TIMEOUT Default value for timeout.
static int	DFLT_TTL Default value for TTL.

Constructor Summary

Constructors

Constructor and Description
ReachabilitySegmentationResolver()

Method Summary

Modifier and Type	Method and Description
boolean	isValidSegment() Checks whether segment is valid.
ReachabilitySegmentationResolver	setAddress(InetAddress addr) Sets target address to check reachability of.
ReachabilitySegmentationResolver	setAddressAsString(String addr) Convenient way to set address.
ReachabilitySegmentationResolver	setNetworkInterface(NetworkInterface itf) In case address is bound to several interfaces this method should be used to explicitly provide necessary interface.
ReachabilitySegmentationResolver	setNetworkInterfaceAddress(InetAddress itfAddr) Sets network interface address to check reachability through.
ReachabilitySegmentationResolver	setNetworkInterfaceAddressAsString(String itfAddr) Convenient way to set network interface address.
ReachabilitySegmentationResolver	setTimeout(int timeout) Sets timeout to use when checking reachability.
ReachabilitySegmentationResolver	setTtl(int ttl) Sets TTL to use when checking reachability.
String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

DFLT_TTL

public static final int DFLT_TTL

Default value for TTL.

See Also:

Constant Field Values

DFLT_TIMEOUT

public static final int DFLT_TIMEOUT

Default value for timeout.

See Also:

Constant Field Values

Constructor Detail

ReachabilitySegmentationResolver

public ReachabilitySegmentationResolver()

Method Detail

isValidSegment

public boolean isValidSegment()
                       throws IgniteCheckedException

Checks whether segment is valid.

When segmentation happens every node ends up in either one of two segments:

• Correct segment
• Invalid segment

Nodes in correct segment will continue operate as if nodes in the invalid segment simply left the topology (i.e. the topology just got "smaller"). Nodes in the invalid segment will realized that were "left out or disconnected" from the correct segment and will try to reconnect via segmentation policy set in configuration.

Specified by:

isValidSegment in interface SegmentationResolver

Returns:

True if segment is correct, false otherwise.

Throws:

IgniteCheckedException - If an error occurred.

setAddress

public ReachabilitySegmentationResolver setAddress(InetAddress addr)

Sets target address to check reachability of.

This is required property. Address has to be set using one of the available methods.

Parameters:

addr - Address to check reachability of.

Returns:

this for chaining.

See Also:

setAddressAsString(String)

setAddressAsString

public ReachabilitySegmentationResolver setAddressAsString(String addr)
                                                    throws IgniteCheckedException

Convenient way to set address.

This is required property. Address has to be set using one of the available methods.

Parameters:

addr - Address to check reachability of.

Returns:

this for chaining.

Throws:

IgniteCheckedException - If host is unknown.

See Also:

setAddress(InetAddress)

setNetworkInterfaceAddress

public ReachabilitySegmentationResolver setNetworkInterfaceAddress(InetAddress itfAddr)

Sets network interface address to check reachability through.

If interface is not specified, check will be performed through any interface available.

Parameters:

itfAddr - Network interface address.

Returns:

this for chaining.

See Also:

setNetworkInterfaceAddressAsString(String), setNetworkInterface(NetworkInterface)

setNetworkInterfaceAddressAsString

public ReachabilitySegmentationResolver setNetworkInterfaceAddressAsString(String itfAddr)
                                                                    throws IgniteCheckedException

Convenient way to set network interface address.

If interface is not specified, check will be performed through any interface available.

Parameters:

itfAddr - Network interface address.

Returns:

this for chaining.

Throws:

IgniteCheckedException - If host is unknown.

See Also:

setNetworkInterfaceAddress(InetAddress), setNetworkInterface(NetworkInterface)

setNetworkInterface

public ReachabilitySegmentationResolver setNetworkInterface(NetworkInterface itf)

In case address is bound to several interfaces this method should be used to explicitly provide necessary interface.

If interface is not specified, check will be performed through any interface available.

Parameters:

itf - Network interface.

Returns:

this for chaining.

See Also:

setNetworkInterfaceAddress(InetAddress), setNetworkInterfaceAddressAsString(String)

setTimeout

public ReachabilitySegmentationResolver setTimeout(int timeout)

Sets timeout to use when checking reachability.

If not provided, DFLT_TIMEOUT is used.

Parameters:

timeout - Timeout.

Returns:

this for chaining.

setTtl

public ReachabilitySegmentationResolver setTtl(int ttl)

Sets TTL to use when checking reachability.

If not provided, DFLT_TTL is used.

Parameters:

ttl - TTL.

Returns:

this for chaining.

toString

public String toString()

Overrides:

toString in class Object