Package org.apache.solr.client.solrj.impl

Class NodeValueFetcher

java.lang.Object

org.apache.solr.client.solrj.impl.NodeValueFetcher

public class NodeValueFetcher
extends Object

This class is responsible for fetching metrics and other attributes from a given node in Solr cluster. This is a helper class that is used by SolrClientNodeStateProvider

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static enum	NodeValueFetcher.Metrics	Various well known tags that can be fetched from a node

Field Summary

Fields

Modifier and Type	Field	Description
static final String	CORES
static final String	HOST
static final Pattern	hostAndPortPattern
static final String	METRICS_PREFIX
static final String	NODE
static final String	PORT
static final String	SYSPROP_PREFIX
static final Set<String>	tags

Constructor Summary

Constructors

Constructor	Description
NodeValueFetcher()

Method Summary

Modifier and Type	Method	Description
static String	extractLabelValueFromLine(String line, String labelKey)
static String	extractMetricNameFromLine(String line)	Extracts the metric name from a prometheus formatted metric:
void	getTags(Set<String> requestedTags, org.apache.solr.client.solrj.impl.SolrClientNodeStateProvider.RemoteCallCtx ctx)

Methods inherited from class java.lang.Object

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

Field Details

NODE

public static final String NODE

See Also:

• Constant Field Values

PORT

public static final String PORT

See Also:

• Constant Field Values

HOST

public static final String HOST

See Also:

• Constant Field Values

CORES

public static final String CORES

See Also:

• Constant Field Values

SYSPROP_PREFIX

public static final String SYSPROP_PREFIX

See Also:

• Constant Field Values

tags

public static final Set<String> tags

hostAndPortPattern

public static final Pattern hostAndPortPattern

METRICS_PREFIX

public static final String METRICS_PREFIX

See Also:

• Constant Field Values

Constructor Details

NodeValueFetcher

public NodeValueFetcher()

Method Details

getTags

public void getTags(Set<String> requestedTags,
 org.apache.solr.client.solrj.impl.SolrClientNodeStateProvider.RemoteCallCtx ctx)

extractMetricNameFromLine

public static String extractMetricNameFromLine(String line)

Extracts the metric name from a prometheus formatted metric:

- With labels: solr_metrics_core_requests_total{core="demo",...} 123.0 - Without labels: solr_metrics_core_requests_total 123.0 - With exemplars: solr_metrics_core_requests_total{core="demo"} 123.0 # {trace_id="abc123"} 2.0 1234567890 The sample inputs would return solr_metrics_core_requests_total

extractLabelValueFromLine

public static String extractLabelValueFromLine(String line,
 String labelKey)