[[java-rest-high-create-index]]
=== Create Index API

[[java-rest-high-create-index-request]]
==== Create Index Request

A `CreateIndexRequest` requires an `index` argument:

["source","java",subs="attributes,callouts,macros"]
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include-tagged::{doc-tests}/IndicesClientDocumentationIT.java[create-index-request]
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<1> The index to create

==== Index settings
Each index created can have specific settings associated with it.

["source","java",subs="attributes,callouts,macros"]
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include-tagged::{doc-tests}/IndicesClientDocumentationIT.java[create-index-request-settings]
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<1> Settings for this index

==== Index mappings
An index may be created with mappings for its document types

["source","java",subs="attributes,callouts,macros"]
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include-tagged::{doc-tests}/IndicesClientDocumentationIT.java[create-index-request-mappings]
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<1> The type to define
<2> The mapping for this type, provided as a JSON string

==== Index aliases
Aliases can be set at index creation time

["source","java",subs="attributes,callouts,macros"]
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include-tagged::{doc-tests}/IndicesClientDocumentationIT.java[create-index-request-aliases]
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<1> The alias to define

==== Optional arguments
The following arguments can optionally be provided:

["source","java",subs="attributes,callouts,macros"]
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include-tagged::{doc-tests}/IndicesClientDocumentationIT.java[create-index-request-timeout]
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<1> Timeout to wait for the all the nodes to acknowledge the index creation as a `TimeValue`
<2> Timeout to wait for the all the nodes to acknowledge the index creation as a `String`

["source","java",subs="attributes,callouts,macros"]
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include-tagged::{doc-tests}/IndicesClientDocumentationIT.java[create-index-request-masterTimeout]
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<1> Timeout to connect to the master node as a `TimeValue`
<2> Timeout to connect to the master node as a `String`

["source","java",subs="attributes,callouts,macros"]
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include-tagged::{doc-tests}/IndicesClientDocumentationIT.java[create-index-request-waitForActiveShards]
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<1> The number of active shard copies to wait for before the create index API returns a
response, as an `int`.
<2> The number of active shard copies to wait for before the create index API returns a
response, as an `ActiveShardCount`.

[[java-rest-high-create-index-sync]]
==== Synchronous Execution

["source","java",subs="attributes,callouts,macros"]
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include-tagged::{doc-tests}/IndicesClientDocumentationIT.java[create-index-execute]
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[[java-rest-high-create-index-async]]
==== Asynchronous Execution

["source","java",subs="attributes,callouts,macros"]
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include-tagged::{doc-tests}/IndicesClientDocumentationIT.java[create-index-execute-async]
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<1> Called when the execution is successfully completed. The response is
provided as an argument
<2> Called in case of failure. The raised exception is provided as an argument

[[java-rest-high-create-index-response]]
==== Create Index Response

The returned `CreateIndexResponse` allows to retrieve information about the executed
 operation as follows:

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include-tagged::{doc-tests}/IndicesClientDocumentationIT.java[create-index-response]
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<1> Indicates whether all of the nodes have acknowledged the request
<2> Indicates whether the requisite number of shard copies were started for each shard in the index before timing out