Class NodePreferenceRulesComparator
- java.lang.Object
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- org.apache.solr.client.solrj.routing.NodePreferenceRulesComparator
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- All Implemented Interfaces:
Comparator<Object>
public class NodePreferenceRulesComparator extends Object implements Comparator<Object>
This comparator makes sure that the given replicas are sorted according to the given list of preferences. E.g. If all nodes prefer local cores then a bad/heavily-loaded node will receive less requests from healthy nodes. This will help prevent a distributed deadlock or timeouts in all the healthy nodes due to one bad node.Optional final preferenceRule is *not* used for pairwise sorting, but instead defines how "equivalent" replicas will be ordered (the base ordering). Defaults to "random"; may specify "stable".
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Constructor Summary
Constructors Constructor Description NodePreferenceRulesComparator(List<PreferenceRule> preferenceRules, SolrParams requestParams, String nodeName, String localHostAddress, NodesSysPropsCacher sysPropsCache, ReplicaListTransformerFactory defaultRltFactory, ReplicaListTransformerFactory stableRltFactory)
NodePreferenceRulesComparator(List<PreferenceRule> preferenceRules, SolrParams requestParams, ReplicaListTransformerFactory defaultRltFactory, ReplicaListTransformerFactory stableRltFactory)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description int
compare(Object left, Object right)
ReplicaListTransformer
getBaseReplicaListTransformer()
List<PreferenceRule>
getPreferenceRules()
List<PreferenceRule>
getSortRules()
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Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
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Methods inherited from interface java.util.Comparator
equals, reversed, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong
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Constructor Detail
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NodePreferenceRulesComparator
public NodePreferenceRulesComparator(List<PreferenceRule> preferenceRules, SolrParams requestParams, ReplicaListTransformerFactory defaultRltFactory, ReplicaListTransformerFactory stableRltFactory)
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NodePreferenceRulesComparator
public NodePreferenceRulesComparator(List<PreferenceRule> preferenceRules, SolrParams requestParams, String nodeName, String localHostAddress, NodesSysPropsCacher sysPropsCache, ReplicaListTransformerFactory defaultRltFactory, ReplicaListTransformerFactory stableRltFactory)
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Method Detail
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getBaseReplicaListTransformer
public ReplicaListTransformer getBaseReplicaListTransformer()
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compare
public int compare(Object left, Object right)
- Specified by:
compare
in interfaceComparator<Object>
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getSortRules
public List<PreferenceRule> getSortRules()
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getPreferenceRules
public List<PreferenceRule> getPreferenceRules()
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