Package org.elasticsearch.cluster.routing.allocation

Class AllocateUnassignedDecision

java.lang.Object

org.elasticsearch.cluster.routing.allocation.AbstractAllocationDecision

org.elasticsearch.cluster.routing.allocation.AllocateUnassignedDecision

All Implemented Interfaces:

Writeable, org.elasticsearch.common.xcontent.ToXContent, org.elasticsearch.common.xcontent.ToXContentFragment

public class AllocateUnassignedDecision
extends AbstractAllocationDecision

Represents the allocation decision by an allocator for an unassigned shard.

Nested Class Summary

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 AllocateUnassignedDecision	NOT_TAKEN	a constant representing a shard decision where no decision was taken

Fields inherited from class org.elasticsearch.cluster.routing.allocation.AbstractAllocationDecision

nodeDecisions, targetNode

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

EMPTY_PARAMS

Constructor Summary

Constructors

Constructor	Description
AllocateUnassignedDecision(StreamInput in)

Method Summary

Modifier and Type	Method	Description
static AllocateUnassignedDecision	delayed(long remainingDelay, long totalDelay, List<NodeAllocationResult> decisions)	Returns a NO decision for a delayed shard allocation on a replica shard, with the individual node-level decisions that comprised the final NO decision, if in explain mode.
boolean	equals(Object other)
static AllocateUnassignedDecision	fromDecision(Decision decision, DiscoveryNode assignedNode, List<NodeAllocationResult> nodeDecisions)	Creates a AllocateUnassignedDecision from the given Decision and the assigned node, if any.
AllocationDecision	getAllocationDecision()	Returns the AllocationDecision denoting the result of an allocation attempt.
String	getAllocationId()	Gets the allocation id for the existing shard copy that the allocator is assigning the shard to.
UnassignedInfo.AllocationStatus	getAllocationStatus()	Returns the status of an unsuccessful allocation attempt.
long	getConfiguredDelayInMillis()	Gets the total configured delay for allocating the replica shard when a node holding the replica left the cluster and the deciders are waiting to see if the node returns before allocating the replica elsewhere.
String	getExplanation()	Gets the explanation for the decision.
long	getRemainingDelayInMillis()	Gets the remaining delay for allocating the replica shard when a node holding the replica left the cluster and the deciders are waiting to see if the node returns before allocating the replica elsewhere.
int	hashCode()
boolean	isDecisionTaken()	Returns true if a decision was taken by the allocator, false otherwise.
static AllocateUnassignedDecision	no(UnassignedInfo.AllocationStatus allocationStatus, List<NodeAllocationResult> decisions)	Returns a NO decision with the given UnassignedInfo.AllocationStatus, and the individual node-level decisions that comprised the final NO decision if in explain mode.
static AllocateUnassignedDecision	no(UnassignedInfo.AllocationStatus allocationStatus, List<NodeAllocationResult> decisions, boolean reuseStore)	Returns a NO decision with the given UnassignedInfo.AllocationStatus, and the individual node-level decisions that comprised the final NO decision if in explain mode.
static AllocateUnassignedDecision	throttle(List<NodeAllocationResult> decisions)	Returns a THROTTLE decision, with the individual node-level decisions that comprised the final THROTTLE decision if in explain mode.
org.elasticsearch.common.xcontent.XContentBuilder	toXContent(org.elasticsearch.common.xcontent.XContentBuilder builder, org.elasticsearch.common.xcontent.ToXContent.Params params)
void	writeTo(StreamOutput out)	Write this into the StreamOutput.
static AllocateUnassignedDecision	yes(DiscoveryNode assignedNode, String allocationId, List<NodeAllocationResult> decisions, boolean reuseStore)	Creates a YES decision with the given individual node-level decisions that comprised the final YES decision, along with the node id to which the shard is assigned and the allocation id for the shard, if available.

Methods inherited from class org.elasticsearch.cluster.routing.allocation.AbstractAllocationDecision

atLeastOneNodeWithYesDecision, checkDecisionState, discoveryNodeToXContent, getNodeDecisions, getTargetNode, nodeDecisionsToXContent, sortNodeDecisions

Methods inherited from class java.lang.Object

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

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

isFragment

Field Details

NOT_TAKEN

public static final AllocateUnassignedDecision NOT_TAKEN

a constant representing a shard decision where no decision was taken

Constructor Details

AllocateUnassignedDecision

public AllocateUnassignedDecision(StreamInput in)
                           throws IOException

Throws:

IOException

Method Details

no

public static AllocateUnassignedDecision no(UnassignedInfo.AllocationStatus allocationStatus,
 @Nullable
 List<NodeAllocationResult> decisions)

Returns a NO decision with the given UnassignedInfo.AllocationStatus, and the individual node-level decisions that comprised the final NO decision if in explain mode.

delayed

public static AllocateUnassignedDecision delayed(long remainingDelay,
 long totalDelay,
 @Nullable
 List<NodeAllocationResult> decisions)

Returns a NO decision for a delayed shard allocation on a replica shard, with the individual node-level decisions that comprised the final NO decision, if in explain mode. Instances created with this method will return UnassignedInfo.AllocationStatus.DELAYED_ALLOCATION for getAllocationStatus().

no

public static AllocateUnassignedDecision no(UnassignedInfo.AllocationStatus allocationStatus,
 @Nullable
 List<NodeAllocationResult> decisions,
 boolean reuseStore)

Returns a NO decision with the given UnassignedInfo.AllocationStatus, and the individual node-level decisions that comprised the final NO decision if in explain mode.

throttle

public static AllocateUnassignedDecision throttle(@Nullable
 List<NodeAllocationResult> decisions)

Returns a THROTTLE decision, with the individual node-level decisions that comprised the final THROTTLE decision if in explain mode.

yes

public static AllocateUnassignedDecision yes(DiscoveryNode assignedNode,
 @Nullable
 String allocationId,
 @Nullable
 List<NodeAllocationResult> decisions,
 boolean reuseStore)

Creates a YES decision with the given individual node-level decisions that comprised the final YES decision, along with the node id to which the shard is assigned and the allocation id for the shard, if available.

fromDecision

public static AllocateUnassignedDecision fromDecision(Decision decision,
 @Nullable
 DiscoveryNode assignedNode,
 @Nullable
 List<NodeAllocationResult> nodeDecisions)

Creates a AllocateUnassignedDecision from the given Decision and the assigned node, if any.

isDecisionTaken

public boolean isDecisionTaken()

Description copied from class: AbstractAllocationDecision

Returns true if a decision was taken by the allocator, false otherwise. If no decision was taken, then the rest of the fields in this object cannot be accessed and will throw an IllegalStateException.

Specified by:

isDecisionTaken in class AbstractAllocationDecision

getAllocationDecision

public AllocationDecision getAllocationDecision()

Returns the AllocationDecision denoting the result of an allocation attempt. If isDecisionTaken() returns false, then invoking this method will throw an IllegalStateException.

getAllocationStatus

@Nullable
public UnassignedInfo.AllocationStatus getAllocationStatus()

Returns the status of an unsuccessful allocation attempt. This value will be null if no decision was taken or if the decision was Decision.Type.YES. If isDecisionTaken() returns false, then invoking this method will throw an IllegalStateException.

getAllocationId

@Nullable
public String getAllocationId()

Gets the allocation id for the existing shard copy that the allocator is assigning the shard to. This method returns a non-null value iff AbstractAllocationDecision.getTargetNode() returns a non-null value and the node on which the shard is assigned already has a shard copy with an in-sync allocation id that we can re-use. If isDecisionTaken() returns false, then invoking this method will throw an IllegalStateException.

getRemainingDelayInMillis

public long getRemainingDelayInMillis()

Gets the remaining delay for allocating the replica shard when a node holding the replica left the cluster and the deciders are waiting to see if the node returns before allocating the replica elsewhere. Only returns a meaningful positive value if getAllocationStatus() returns UnassignedInfo.AllocationStatus.DELAYED_ALLOCATION. If isDecisionTaken() returns false, then invoking this method will throw an IllegalStateException.

getConfiguredDelayInMillis

public long getConfiguredDelayInMillis()

Gets the total configured delay for allocating the replica shard when a node holding the replica left the cluster and the deciders are waiting to see if the node returns before allocating the replica elsewhere. Only returns a meaningful positive value if getAllocationStatus() returns UnassignedInfo.AllocationStatus.DELAYED_ALLOCATION. If isDecisionTaken() returns false, then invoking this method will throw an IllegalStateException.

getExplanation

public String getExplanation()

Description copied from class: AbstractAllocationDecision

Gets the explanation for the decision. If AbstractAllocationDecision.isDecisionTaken() returns false, then invoking this method will throw an IllegalStateException.

Specified by:

getExplanation in class AbstractAllocationDecision

toXContent

public org.elasticsearch.common.xcontent.XContentBuilder toXContent(org.elasticsearch.common.xcontent.XContentBuilder builder,
 org.elasticsearch.common.xcontent.ToXContent.Params params)
                                                             throws IOException

Throws:

IOException

writeTo

public void writeTo(StreamOutput out)
             throws IOException

Description copied from interface: Writeable

Write this into the StreamOutput.

Specified by:

writeTo in interface Writeable

Overrides:

writeTo in class AbstractAllocationDecision

Throws:

IOException

equals

public boolean equals(Object other)

Overrides:

equals in class AbstractAllocationDecision

hashCode

public int hashCode()

Overrides:

hashCode in class AbstractAllocationDecision