OpenSearch/docs/java-rest/high-level/document/get.asciidoc

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--
:api: get
:request: GetRequest
:response: GetResponse
--
[id="{upid}-{api}"]
=== Get API
[id="{upid}-{api}-request"]
==== Get Request
A +{request}+ requires the following arguments:
["source","java",subs="attributes,callouts,macros"]
--------------------------------------------------
include-tagged::{doc-tests-file}[{api}-request]
--------------------------------------------------
<1> Index
<2> Type
<3> Document id
[id="{upid}-{api}-request-optional-arguments"]
==== Optional arguments
The following arguments can optionally be provided:
["source","java",subs="attributes,callouts,macros"]
--------------------------------------------------
include-tagged::{doc-tests-file}[{api}-request-no-source]
--------------------------------------------------
<1> Disable source retrieval, enabled by default
["source","java",subs="attributes,callouts,macros"]
--------------------------------------------------
include-tagged::{doc-tests-file}[{api}-request-source-include]
--------------------------------------------------
<1> Configure source inclusion for specific fields
["source","java",subs="attributes,callouts,macros"]
--------------------------------------------------
include-tagged::{doc-tests-file}[{api}-request-source-exclude]
--------------------------------------------------
<1> Configure source exclusion for specific fields
["source","java",subs="attributes,callouts,macros"]
--------------------------------------------------
include-tagged::{doc-tests-file}[{api}-request-stored]
--------------------------------------------------
<1> Configure retrieval for specific stored fields (requires fields to be
stored separately in the mappings)
<2> Retrieve the `message` stored field (requires the field to be stored
separately in the mappings)
["source","java",subs="attributes,callouts,macros"]
--------------------------------------------------
include-tagged::{doc-tests-file}[{api}-request-routing]
--------------------------------------------------
<1> Routing value
["source","java",subs="attributes,callouts,macros"]
--------------------------------------------------
include-tagged::{doc-tests-file}[{api}-request-preference]
--------------------------------------------------
<1> Preference value
["source","java",subs="attributes,callouts,macros"]
--------------------------------------------------
include-tagged::{doc-tests-file}[{api}-request-realtime]
--------------------------------------------------
<1> Set realtime flag to `false` (`true` by default)
["source","java",subs="attributes,callouts,macros"]
--------------------------------------------------
include-tagged::{doc-tests-file}[{api}-request-refresh]
--------------------------------------------------
<1> Perform a refresh before retrieving the document (`false` by default)
["source","java",subs="attributes,callouts,macros"]
--------------------------------------------------
include-tagged::{doc-tests-file}[{api}-request-version]
--------------------------------------------------
<1> Version
["source","java",subs="attributes,callouts,macros"]
--------------------------------------------------
include-tagged::{doc-tests-file}[{api}-request-version-type]
--------------------------------------------------
<1> Version type
include::../execution.asciidoc[]
[id="{upid}-{api}-response"]
==== Get Response
The returned +{response}+ allows to retrieve the requested document along with
its metadata and eventually stored fields.
["source","java",subs="attributes,callouts,macros"]
--------------------------------------------------
include-tagged::{doc-tests-file}[{api}-response]
--------------------------------------------------
<1> Retrieve the document as a `String`
<2> Retrieve the document as a `Map<String, Object>`
<3> Retrieve the document as a `byte[]`
<4> Handle the scenario where the document was not found. Note that although
the returned response has `404` status code, a valid +{response}+ is
returned rather than an exception thrown. Such response does not hold any
source document and its `isExists` method returns `false`.
When a get request is performed against an index that does not exist, the
response has `404` status code, an `ElasticsearchException` gets thrown
which needs to be handled as follows:
["source","java",subs="attributes,callouts,macros"]
--------------------------------------------------
include-tagged::{doc-tests-file}[{api}-indexnotfound]
--------------------------------------------------
<1> Handle the exception thrown because the index does not exist
In case a specific document version has been requested, and the existing
document has a different version number, a version conflict is raised:
["source","java",subs="attributes,callouts,macros"]
--------------------------------------------------
include-tagged::{doc-tests-file}[{api}-conflict]
--------------------------------------------------
<1> The raised exception indicates that a version conflict error was returned