org.gridgain.grid

Interface GridNodeShadow

All Superinterfaces:

GridMetadataAware, Serializable

public interface GridNodeShadow
extends GridMetadataAware

A node shadow is a read-only snapshot of last known node internal state. Node shadow is available on GridDiscoveryEvent.

Method Summary

Methods

Modifier and Type	Method and Description
Collection<String>	addresses() Gets collection of addresses this node is known by.
<T> T	attribute(String name) Gets a node attribute.
Map<String,Object>	attributes() Gets all node attributes.
long	created() Gets the timestamp of when this shadow was created.
String	gridName() Gets grid name for the node.
Collection<String>	hostNames() Gets collection of host names this node is known by.
UUID	id() Gets globally unique node ID.
boolean	isDaemon() Tests whether or not this node is a daemon.
GridNodeMetrics	lastMetrics() Gets the last snapshot of the metrics for this shadow's node.
long	order() Node order within grid topology.

Methods inherited from interface org.gridgain.grid.GridMetadataAware

addMeta, addMetaIfAbsent, addMetaIfAbsent, allMeta, copyMeta, copyMeta, hasMeta, hasMeta, meta, putMetaIfAbsent, putMetaIfAbsent, removeMeta, removeMeta, replaceMeta

Method Detail

id

UUID id()

Gets globally unique node ID.

Returns:

Globally unique node ID.

gridName

String gridName()

Gets grid name for the node.

Returns:

Grid name for the node.

isDaemon

boolean isDaemon()

Tests whether or not this node is a daemon.

Daemon nodes are the usual grid nodes that participate in topology but not visible on the main APIs, i.e. they are not part of any projections. The only way to see daemon nodes is to use this method.

Daemon nodes are used primarily for management and monitoring functionality that is build on GridGain and needs to participate in the topology but also needs to be excluded from "normal" topology so that it won't participate in task execution or in-memory data grid storage.

Returns:

true if this is a daemon node, false otherwise.

created

long created()

Gets the timestamp of when this shadow was created.

Returns:

Timestamp of creation.

lastMetrics

GridNodeMetrics lastMetrics()

Gets the last snapshot of the metrics for this shadow's node. Note that unlike the live node these metrics won't be updating and calling this method multiple times will result in the same value returned.

Returns:

Last snapshot of the metrics for this shadow's node.

attribute

<T> T attribute(String name)

Gets a node attribute.

Type Parameters:

T - Attribute Type.

Parameters:

name - Attribute name. Note that attribute names starting with org.gridgain are reserved for internal use.

Returns:

Attribute value or null.

attributes

Map<String,Object> attributes()

Gets all node attributes.

Returns:

All node attributes.

addresses

Collection<String> addresses()

Gets collection of addresses this node is known by.

Returns:

Collection of addresses.

hostNames

Collection<String> hostNames()

Gets collection of host names this node is known by.

Returns:

Collection of host names.

order

long order()

Node order within grid topology. Discovery SPIs that support node ordering will assign a proper order to each node and will guarantee that discovery event notifications for new nodes will come in proper order. All other SPIs not supporting ordering may choose to return node startup time here.

Returns:

Node startup order.