[[java-rest-high-get-mappings]]
=== Get Mappings API

[[java-rest-high-get-mappings-request]]
==== Get Mappings Request

A `GetMappingsRequest` can have an optional list of indices and optional list of types:

["source","java",subs="attributes,callouts,macros"]
--------------------------------------------------
include-tagged::{doc-tests}/IndicesClientDocumentationIT.java[get-mapping-request]
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<1> An empty request that will return all indices and types
<2> Setting the indices to fetch mapping for
<3> The types to be returned

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

["source","java",subs="attributes,callouts,macros"]
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include-tagged::{doc-tests}/IndicesClientDocumentationIT.java[get-mapping-request-masterTimeout]
--------------------------------------------------
<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"]
--------------------------------------------------
include-tagged::{doc-tests}/IndicesClientDocumentationIT.java[get-mapping-request-indicesOptions]
--------------------------------------------------
<1> Options for expanding indices names

[[java-rest-high-get-mappings-sync]]
==== Synchronous Execution

["source","java",subs="attributes,callouts,macros"]
--------------------------------------------------
include-tagged::{doc-tests}/IndicesClientDocumentationIT.java[get-mapping-execute]
--------------------------------------------------

[[java-rest-high-get-mapping-async]]
==== Asynchronous Execution

The asynchronous execution of a get mappings request requires both the
`GetMappingsRequest` instance and an `ActionListener` instance to be passed to
the asynchronous method:

["source","java",subs="attributes,callouts,macros"]
--------------------------------------------------
include-tagged::{doc-tests}/IndicesClientDocumentationIT.java[get-mapping-execute-async]
--------------------------------------------------
<1> The `GetMappingsRequest` to execute and the `ActionListener` to use when the execution completes

The asynchronous method does not block and returns immediately. Once it is
completed the `ActionListener` is called back using the `onResponse` method if
the execution successfully completed or using the `onFailure` method if it
failed.

A typical listener for `GetMappingsResponse` looks like:

["source","java",subs="attributes,callouts,macros"]
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include-tagged::{doc-tests}/IndicesClientDocumentationIT.java[get-mapping-execute-listener]
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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-get-mapping-response]]
==== Get Mappings Response

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

["source","java",subs="attributes,callouts,macros"]
--------------------------------------------------
include-tagged::{doc-tests}/IndicesClientDocumentationIT.java[get-mapping-response]
--------------------------------------------------
<1> Returning all indices' mappings
<2> Retrieving the mappings for a particular index and type
<3> Getting the mappings for the "tweet" as a Java Map