Package org.elasticsearch.client

Interface NodeSelector

All Known Implementing Classes:

HasAttributeNodeSelector

public interface NodeSelector

Selects nodes that can receive requests. Used to keep requests away from master nodes or to send them to nodes with a particular attribute. Use with RestClientBuilder.setNodeSelector(NodeSelector).

Field Summary

Fields

Modifier and Type	Field	Description
static NodeSelector	ANY	Selector that matches any node.
static NodeSelector	SKIP_DEDICATED_MASTERS	Selector that matches any node that has metadata and doesn't have the master role OR it has the data data role.

Method Summary

Modifier and Type	Method	Description
void	select(java.lang.Iterable<Node> nodes)	Select the Nodes to which to send requests.

Field Detail

ANY

static final NodeSelector ANY

Selector that matches any node.

SKIP_DEDICATED_MASTERS

static final NodeSelector SKIP_DEDICATED_MASTERS

Selector that matches any node that has metadata and doesn't have the master role OR it has the data data role.

Method Detail

select

void select(java.lang.Iterable<Node> nodes)

Select the Nodes to which to send requests. This is called with a mutable Iterable of Nodes in the order that the rest client would prefer to use them and implementers should remove nodes from the that should not receive the request. Implementers may iterate the nodes as many times as they need.

This may be called twice per request: first for "living" nodes that have not been blacklisted by previous errors. If the selector removes all nodes from the list or if there aren't any living nodes then the RestClient will call this method with a list of "dead" nodes.

Implementers should not rely on the ordering of the nodes.