Package org.elasticsearch.cluster.routing.allocation.decider

Class Decision

org.elasticsearch.cluster.routing.allocation.decider.Decision
All Implemented Interfaces:
Writeable, org.elasticsearch.common.xcontent.ToXContent
Direct Known Subclasses:
Decision.Multi, Decision.Single
public abstract class Decision extends implements org.elasticsearch.common.xcontent.ToXContent, Writeable
This abstract class defining basic Decision used during shard allocation process.
See Also:
AllocationDecider

  • Nested Class Summary

    Nested Classes
    Modifier and Type
    Class
    Description
    static class 
    Decision.Multi
    Simple class representing a list of decisions
    static class 
    Decision.Single
    Simple class representing a single decision
    static class 
    Decision.Type
    This enumeration defines the possible types of decisions

    Nested classes/interfaces inherited from interface org.elasticsearch.common.xcontent.ToXContent

    org.elasticsearch.common.xcontent.ToXContent.DelegatingMapParams, org.elasticsearch.common.xcontent.ToXContent.MapParams, org.elasticsearch.common.xcontent.ToXContent.Params

    Nested classes/interfaces inherited from interface org.elasticsearch.common.io.stream.Writeable

    Writeable.Reader<V>, Writeable.Writer<V>

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    static Decision
    ALWAYS
     
    static Decision
    NO
     
    static Decision
    THROTTLE
     
    static Decision
    YES
     

    Fields inherited from interface org.elasticsearch.common.xcontent.ToXContent

    EMPTY_PARAMS

  • Constructor Summary

    Constructors
    Constructor
    Description
    Decision()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    abstract <Decision>
    getDecisions()
    Return the list of all decisions that make up this decision
    abstract
    getExplanation()
    Get the explanation for this decision.
    abstract
    label()
    Get the description label for this decision.
    static Decision
    readFrom​(StreamInput in)
     
    static Decision
    single​(Decision.Type type,  label,  explanation, ... explanationParams)
    Creates a simple decision
    abstract Decision.Type
    type()
    Get the Decision.Type of this decision

    Methods inherited from class java.lang.

    , , , , , , , , , ,

    Methods inherited from interface org.elasticsearch.common.xcontent.ToXContent

    isFragment, toXContent

    Methods inherited from interface org.elasticsearch.common.io.stream.Writeable

    writeTo

  • Field Details

    • ALWAYS

      public static final Decision ALWAYS

    • YES

      public static final Decision YES

    • NO

      public static final Decision NO

    • THROTTLE

      public static final Decision THROTTLE

  • Constructor Details

    • Decision

      public Decision()

  • Method Details

    • single

      public static Decision single​(Decision.Type type, @Nullable  label, @Nullable  explanation, @Nullable ... explanationParams)
      Creates a simple decision
      Parameters:
      type - Decision.Type of the decision
      label - label for the Decider that produced this decision
      explanation - explanation of the decision
      explanationParams - additional parameters for the decision
      Returns:
      new Decision instance

    • readFrom

      public static Decision readFrom​(StreamInput in) throws
      Throws:

    • type

      public abstract Decision.Type type()
      Get the Decision.Type of this decision
      Returns:
      Decision.Type of this decision

    • label

      @Nullable public abstract  label()
      Get the description label for this decision.

    • getExplanation

      @Nullable public abstract  getExplanation()
      Get the explanation for this decision.

    • getDecisions

      public abstract <Decision> getDecisions()
      Return the list of all decisions that make up this decision