org.apache.ignite.internal.commandline.util

Class TopologyUtils

java.lang.Object

org.apache.ignite.internal.commandline.util.TopologyUtils

public final class TopologyUtils
extends Object

Class provides utility methods to work with nodes in topology: finding coordinator, filtering client nodes and so on.

Constructor Summary

Constructors

Constructor and Description
TopologyUtils()

Method Summary

Modifier and Type	Method and Description
static Optional<GridClientNode>	anyConnectableServerNode(GridClientCompute compute) Obtains any connectable server node from the topology visible through client compute interface at the moment of method call.
static UUID	coordinatorId(GridClientCompute compute) Obtains ID of coordinator node from the topology visible through client compute interface at the moment of method call.

Methods inherited from class java.lang.Object

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

Constructor Detail

TopologyUtils

public TopologyUtils()

Method Detail

coordinatorId

public static UUID coordinatorId(GridClientCompute compute)
                          throws GridClientException

Obtains ID of coordinator node from the topology visible through client compute interface at the moment of method call. The method relies on the discovery implementation detail that coordinator role is always assigned to the oldest server node in topology which means the order of the node is minimal among all alive server nodes in topology.

Parameters:

compute - GridClientCompute instance to obtain list of nodes in topology.

Returns:

Id of coordinator node or null if topology is empty.

Throws:

GridClientException - If client doesn't have an actual topology version.

anyConnectableServerNode

public static Optional<GridClientNode> anyConnectableServerNode(GridClientCompute compute)
                                                         throws GridClientException

Obtains any connectable server node from the topology visible through client compute interface at the moment of method call. Method returns only a node which is connectable for the local client which means a direct p2p connection can be established from the client to the node.

Parameters:

compute - GridClientCompute instance to obtain list of nodes in topology.

Returns:

Optional object containing any connectable server node.

Throws:

GridClientException - If client doesn't have an actual topology version.