--
:api: asyncsearch-get
:request: GetAsyncSearchRequest
:response: AsyncSearchResponse
--

[role="xpack"]
[id="{upid}-{api}"]
=== Get Async Search API

[id="{upid}-{api}-request"]
==== Request

A +{request}+ allows to get a running asynchronous search task by
its id. Required arguments are the `id` of a running async search:

["source","java",subs="attributes,callouts,macros"]
--------------------------------------------------
include-tagged::{doc-tests-file}[{api}-request]
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==== Optional arguments
The following arguments can optionally be provided:

["source","java",subs="attributes,callouts,macros"]
--------------------------------------------------
include-tagged::{doc-tests-file}[{api}-request-arguments]
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<1> The minimum time that the request should wait before 
returning a partial result (defaults to no wait).
<2> The expiration time of the request (defaults to none).


[id="{upid}-{api}-sync"]
==== Synchronous Execution

["source","java",subs="attributes,callouts,macros"]
--------------------------------------------------
include-tagged::{doc-tests-file}[{api}-execute]
--------------------------------------------------
<1> Execute the request and get back the response as an +{response}+ object.

[id="{upid}-{api}-async"]
==== Asynchronous Execution

The asynchronous execution of a +{request}+ allows to use an 
`ActionListener` to be called back when the submit request returns: 

["source","java",subs="attributes,callouts,macros"]
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include-tagged::{doc-tests-file}[{api}-execute-async]
--------------------------------------------------
<1> The +{request}+ 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 +{response}+ looks like:

["source","java",subs="attributes,callouts,macros"]
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include-tagged::{doc-tests-file}[{api}-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

[id="{upid}-{api}-response"]
==== Response

The returned +{response}+ allows to retrieve information about the executed
 operation as follows:

["source","java",subs="attributes,callouts,macros"]
--------------------------------------------------
include-tagged::{doc-tests-file}[{api}-response]
--------------------------------------------------
<1> The `SearchResponse`, or `null` if not available yet
<2> The id of the async search request, `null` if the response isn't stored
<3> `true` when the response contains partial results
<4> `true` when the search is still running
<5> The time the response was created (millis since epoch)
<6> The time the response expires (millis since epoch)
<7> Get failure reasons or `null` for no failures