Package org.apache.solr.cluster.placement.impl

Class AttributeFetcherImpl

java.lang.Object

org.apache.solr.cluster.placement.impl.AttributeFetcherImpl

All Implemented Interfaces:

AttributeFetcher

public class AttributeFetcherImpl
extends Object
implements AttributeFetcher

Implementation of AttributeFetcher that uses SolrCloudManager to access Solr cluster details.

Method Summary

Modifier and Type	Method	Description
AttributeValues	fetchAttributes()	Fetches all requested node attributes from all nodes passed to AttributeFetcher.fetchFrom(Set) as well as non-node attributes (those requested using e.g.
AttributeFetcher	fetchFrom(Set<Node> nodes)	The set of nodes from which to fetch all node related attributes.
static String	getSystemPropertySnitchTag(String name)
AttributeFetcher	requestCollectionMetrics(SolrCollection solrCollection, Set<ReplicaMetric<?>> metrics)	Request collection-level metrics.
AttributeFetcher	requestNodeMetric(NodeMetric<?> metric)	Request a node metric from each node.
AttributeFetcher	requestNodeSystemProperty(String name)	Request a given system property on each node.

Methods inherited from class java.lang.Object

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

Method Details

requestNodeSystemProperty

public AttributeFetcher requestNodeSystemProperty(String name)

Description copied from interface: AttributeFetcher

Request a given system property on each node. To get the value use AttributeValues.getSystemProperty(Node, String)

Specified by:

requestNodeSystemProperty in interface AttributeFetcher

Parameters:

name - system property name

requestNodeMetric

public AttributeFetcher requestNodeMetric(NodeMetric<?> metric)

Description copied from interface: AttributeFetcher

Request a node metric from each node. To get the value use AttributeValues.getNodeMetric(Node, NodeMetric)

Specified by:

requestNodeMetric in interface AttributeFetcher

Parameters:

metric - metric to retrieve (see NodeMetric)

requestCollectionMetrics

public AttributeFetcher requestCollectionMetrics(SolrCollection solrCollection,
 Set<ReplicaMetric<?>> metrics)

Description copied from interface: AttributeFetcher

Request collection-level metrics. To get the values use AttributeValues.getCollectionMetrics(String). Note that this request will fetch information from nodes that are relevant to the collection replicas and not the ones specified in AttributeFetcher.fetchFrom(Set) (though they may overlap).

Specified by:

requestCollectionMetrics in interface AttributeFetcher

Parameters:

solrCollection - request metrics for this collection

metrics - metrics to retrieve (see ReplicaMetric)

fetchFrom

public AttributeFetcher fetchFrom(Set<Node> nodes)

Description copied from interface: AttributeFetcher

The set of nodes from which to fetch all node related attributes. Calling this method is mandatory if any of the requestNode* methods got called.

Specified by:

fetchFrom in interface AttributeFetcher

Parameters:

nodes - nodes to fetch from

fetchAttributes

public AttributeValues fetchAttributes()

Description copied from interface: AttributeFetcher

Fetches all requested node attributes from all nodes passed to AttributeFetcher.fetchFrom(Set) as well as non-node attributes (those requested using e.g. AttributeFetcher.requestCollectionMetrics(SolrCollection, Set).

Specified by:

fetchAttributes in interface AttributeFetcher

Returns:

An instance allowing retrieval of all attributes that could be fetched.

getSystemPropertySnitchTag

public static String getSystemPropertySnitchTag(String name)