org.elasticsearch.cluster.routing

Class AllocationId

java.lang.Object

org.elasticsearch.cluster.routing.AllocationId

All Implemented Interfaces:

ToXContent

public class AllocationId
extends Object
implements ToXContent

Uniquely identifies an allocation. An allocation is a shard moving from unassigned to initializing, or relocation.

Relocation is a special case, where the origin shard is relocating with a relocationId and same id, and the target shard (only materialized in RoutingNodes) is initializing with the id set to the origin shard relocationId. Once relocation is done, the new allocation id is set to the relocationId. This is similar behavior to how ShardRouting#currentNodeId is used.

Nested Class Summary

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

ToXContent.DelegatingMapParams, ToXContent.MapParams, ToXContent.Params

Field Summary

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

EMPTY_PARAMS

Method Summary

Methods

Modifier and Type	Method and Description
static AllocationId	cancelRelocation(AllocationId allocationId) Creates a new allocation id representing a cancelled relocation.
boolean	equals(Object o)
static AllocationId	finishRelocation(AllocationId allocationId) Creates a new allocation id finalizing a relocation.
String	getId() The allocation id uniquely identifying an allocation, note, if it is relocation the getRelocationId() need to be taken into account as well.
String	getRelocationId() The transient relocation id holding the unique id that is used for relocation.
int	hashCode()
static AllocationId	newInitializing() Creates a new allocation id for initializing allocation.
static AllocationId	newRelocation(AllocationId allocationId) Creates a new allocation id for a shard that moves to be relocated, populating the transient holder for relocationId.
static AllocationId	newTargetRelocation(AllocationId allocationId) Creates a new allocation id for the target initializing shard that is the result of a relocation.
String	toString()
XContentBuilder	toXContent(XContentBuilder builder, ToXContent.Params params)
void	writeTo(StreamOutput out)

Methods inherited from class java.lang.Object

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

Method Detail

writeTo

public void writeTo(StreamOutput out)
             throws IOException

Throws:

IOException

newInitializing

public static AllocationId newInitializing()

Creates a new allocation id for initializing allocation.

newTargetRelocation

public static AllocationId newTargetRelocation(AllocationId allocationId)

Creates a new allocation id for the target initializing shard that is the result of a relocation.

newRelocation

public static AllocationId newRelocation(AllocationId allocationId)

Creates a new allocation id for a shard that moves to be relocated, populating the transient holder for relocationId.

cancelRelocation

public static AllocationId cancelRelocation(AllocationId allocationId)

Creates a new allocation id representing a cancelled relocation.

Note that this is expected to be called on the allocation id of the *source* shard

finishRelocation

public static AllocationId finishRelocation(AllocationId allocationId)

Creates a new allocation id finalizing a relocation.

Note that this is expected to be called on the allocation id of the *target* shard and thus it only needs to clear the relocating id.

getId

public String getId()

The allocation id uniquely identifying an allocation, note, if it is relocation the getRelocationId() need to be taken into account as well.

getRelocationId

public String getRelocationId()

The transient relocation id holding the unique id that is used for relocation.

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class Object

toXContent

public XContentBuilder toXContent(XContentBuilder builder,
                         ToXContent.Params params)
                           throws IOException

Specified by:

toXContent in interface ToXContent

Throws:

IOException