[[java-rest-high-migration-get-assistance]]
=== Migration Get Assistance

[[java-rest-high-migration-get-assistance-request]]
==== Index Upgrade Info Request

An `IndexUpgradeInfoRequest` does not require any argument:

["source","java",subs="attributes,callouts,macros"]
--------------------------------------------------
include-tagged::{doc-tests}/MigrationClientDocumentationIT.java[get-assistance-request]
--------------------------------------------------
<1> Create a new request instance

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

["source","java",subs="attributes,callouts,macros"]
--------------------------------------------------
include-tagged::{doc-tests}/MigrationClientDocumentationIT.java[get-assistance-request-indices]
--------------------------------------------------
<1> Set the indices to the request

["source","java",subs="attributes,callouts,macros"]
--------------------------------------------------
include-tagged::{doc-tests}/MigrationClientDocumentationIT.java[get-assistance-request-indices-options]
--------------------------------------------------
<1> Set the `IndicesOptions` to control how unavailable indices are resolved and
how wildcard expressions are expanded

[[java-rest-high-migration-get-assistance-execution]]
==== Execution

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

[[java-rest-high-migration-get-assistance-response]]
==== Response

The returned `IndexUpgradeInfoResponse` contains the actions required for each index.

["source","java",subs="attributes,callouts,macros"]
--------------------------------------------------
include-tagged::{doc-tests}/MigrationClientDocumentationIT.java[get-assistance-response]
--------------------------------------------------
<1> Retrieve the index
<2> Retrieve the action required for the migration of the current index