Package org.elasticsearch.search.slice

Class SliceBuilder

java.lang.Object

org.elasticsearch.search.slice.SliceBuilder

All Implemented Interfaces:

Writeable, ToXContent, ToXContentObject

public class SliceBuilder
extends java.lang.Object
implements Writeable, ToXContentObject

A slice builder allowing to split a scroll in multiple partitions. If the provided field is the "_uid" it uses a TermsSliceQuery to do the slicing. The slicing is done at the shard level first and then each shard is split into multiple slices. For instance if the number of shards is equal to 2 and the user requested 4 slices then the slices 0 and 2 are assigned to the first shard and the slices 1 and 3 are assigned to the second shard. This way the total number of bitsets that we need to build on each shard is bounded by the number of slices (instead of numShards*numSlices). Otherwise the provided field must be a numeric and doc_values must be enabled. In that case a DocValuesSliceQuery is used to filter the results.

Nested Class Summary

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

ToXContent.DelegatingMapParams, ToXContent.MapParams, 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 ParseField	FIELD_FIELD
static ParseField	ID_FIELD
static ParseField	MAX_FIELD

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

EMPTY_PARAMS

Constructor Summary

Constructors

Constructor	Description
SliceBuilder(int id, int max)
SliceBuilder(java.lang.String field, int id, int max)
SliceBuilder(StreamInput in)

Method Summary

Modifier and Type	Method	Description
boolean	equals(java.lang.Object other)
static SliceBuilder	fromXContent(XContentParser parser)
java.lang.String	getField()	The name of the field to slice against
int	getId()	The id of the slice.
int	getMax()	The maximum number of slices.
int	hashCode()
org.apache.lucene.search.Query	toFilter(QueryShardContext context, int shardId, int numShards)
java.lang.String	toString()
XContentBuilder	toXContent(XContentBuilder builder, ToXContent.Params params)
void	writeTo(StreamOutput out)	Write this into the StreamOutput.

Methods inherited from class java.lang.Object

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

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

isFragment

Field Detail

FIELD_FIELD

public static final ParseField FIELD_FIELD

ID_FIELD

public static final ParseField ID_FIELD

MAX_FIELD

public static final ParseField MAX_FIELD

Constructor Detail

SliceBuilder

public SliceBuilder(int id,
                    int max)

SliceBuilder

public SliceBuilder(java.lang.String field,
                    int id,
                    int max)

Parameters:

field - The name of the field

id - The id of the slice

max - The maximum number of slices

SliceBuilder

public SliceBuilder(StreamInput in)
             throws java.io.IOException

Throws:

java.io.IOException

Method Detail

writeTo

public void writeTo(StreamOutput out)
             throws java.io.IOException

Description copied from interface: Writeable

Write this into the StreamOutput.

Specified by:

writeTo in interface Writeable

Throws:

java.io.IOException

getField

public java.lang.String getField()

The name of the field to slice against

getId

public int getId()

The id of the slice.

getMax

public int getMax()

The maximum number of slices.

toXContent

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

Specified by:

toXContent in interface ToXContent

Throws:

java.io.IOException

fromXContent

public static SliceBuilder fromXContent(XContentParser parser)
                                 throws java.io.IOException

Throws:

java.io.IOException

equals

public boolean equals(java.lang.Object other)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

toFilter

public org.apache.lucene.search.Query toFilter(QueryShardContext context,
                                               int shardId,
                                               int numShards)

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object