OpenSearch/docs/java-rest/high-level/indices/shrink_index.asciidoc

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[[java-rest-high-shrink-index]]
=== Shrink Index API
[[java-rest-high-shrink-index-request]]
==== Resize Request
The Shrink API requires a `ResizeRequest` instance.
A `ResizeRequest` requires two string arguments:
["source","java",subs="attributes,callouts,macros"]
--------------------------------------------------
include-tagged::{doc-tests}/IndicesClientDocumentationIT.java[shrink-index-request]
--------------------------------------------------
<1> The target index (first argument) to shrink the source index (second argument) into
==== Optional arguments
The following arguments can optionally be provided:
["source","java",subs="attributes,callouts,macros"]
--------------------------------------------------
include-tagged::{doc-tests}/IndicesClientDocumentationIT.java[shrink-index-request-timeout]
--------------------------------------------------
<1> Timeout to wait for the all the nodes to acknowledge the index is opened
as a `TimeValue`
<2> Timeout to wait for the all the nodes to acknowledge the index is opened
as a `String`
["source","java",subs="attributes,callouts,macros"]
--------------------------------------------------
include-tagged::{doc-tests}/IndicesClientDocumentationIT.java[shrink-index-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[shrink-index-request-waitForActiveShards]
--------------------------------------------------
<1> The number of active shard copies to wait for before the shrink index API
returns a response, as an `int`
<2> The number of active shard copies to wait for before the shrink index API
returns a response, as an `ActiveShardCount`
["source","java",subs="attributes,callouts,macros"]
--------------------------------------------------
include-tagged::{doc-tests}/IndicesClientDocumentationIT.java[shrink-index-request-settings]
--------------------------------------------------
<1> The number of shards on the target of the shrink index request
<2> Remove the allocation requirement copied from the source index
["source","java",subs="attributes,callouts,macros"]
--------------------------------------------------
include-tagged::{doc-tests}/IndicesClientDocumentationIT.java[shrink-index-request-aliases]
--------------------------------------------------
<1> The aliases to associate the target index with
[[java-rest-high-shrink-index-sync]]
==== Synchronous Execution
["source","java",subs="attributes,callouts,macros"]
--------------------------------------------------
include-tagged::{doc-tests}/IndicesClientDocumentationIT.java[shrink-index-execute]
--------------------------------------------------
[[java-rest-high-shrink-index-async]]
==== Asynchronous Execution
The asynchronous execution of a shrink index request requires both the `ResizeRequest`
instance and an `ActionListener` instance to be passed to the asynchronous
method:
["source","java",subs="attributes,callouts,macros"]
--------------------------------------------------
include-tagged::{doc-tests}/IndicesClientDocumentationIT.java[shrink-index-execute-async]
--------------------------------------------------
<1> The `ResizeRequest` 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 `ResizeResponse` looks like:
["source","java",subs="attributes,callouts,macros"]
--------------------------------------------------
include-tagged::{doc-tests}/IndicesClientDocumentationIT.java[shrink-index-execute-listener]
--------------------------------------------------
<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-shrink-index-response]]
==== Shrink Index Response
The returned `ResizeResponse` allows to retrieve information about the
executed operation as follows:
["source","java",subs="attributes,callouts,macros"]
--------------------------------------------------
include-tagged::{doc-tests}/IndicesClientDocumentationIT.java[shrink-index-response]
--------------------------------------------------
<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