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HLRC: Add ML get categories API (#33465)

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HLRC: Adding the ML 'get categories' API
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Ed Savage 2018-09-11 12:48:14 +01:00 • committed by GitHub
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83
docs/java-rest/high-level/ml/get-categories.asciidoc Normal file
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@ -0,0 +1,83 @@
[[java-rest-high-x-pack-ml-get-categories]]
=== Get Categories API
The Get Categories API retrieves one or more category results.
It accepts a `GetCategoriesRequest` object and responds
with a `GetCategoriesResponse` object.
[[java-rest-high-x-pack-ml-get-categories-request]]
==== Get Categories Request
A `GetCategoriesRequest` object gets created with an existing non-null `jobId`.
["source","java",subs="attributes,callouts,macros"]
--------------------------------------------------
include-tagged::{doc-tests}/MlClientDocumentationIT.java[x-pack-ml-get-categories-request]
--------------------------------------------------
<1> Constructing a new request referencing an existing `jobId`
==== Optional Arguments
The following arguments are optional:
["source","java",subs="attributes,callouts,macros"]
--------------------------------------------------
include-tagged::{doc-tests}/MlClientDocumentationIT.java[x-pack-ml-get-categories-category-id]
--------------------------------------------------
<1> The id of the category to get. Otherwise it will return all categories.
["source","java",subs="attributes,callouts,macros"]
--------------------------------------------------
include-tagged::{doc-tests}/MlClientDocumentationIT.java[x-pack-ml-get-categories-page]
--------------------------------------------------
<1> The page parameters `from` and `size`. `from` specifies the number of categories to skip.
`size` specifies the maximum number of categories to get. Defaults to `0` and `100` respectively.
[[java-rest-high-x-pack-ml-get-categories-execution]]
==== Execution
The request can be executed through the `MachineLearningClient` contained
in the `RestHighLevelClient` object, accessed via the `machineLearningClient()` method.
["source","java",subs="attributes,callouts,macros"]
--------------------------------------------------
include-tagged::{doc-tests}/MlClientDocumentationIT.java[x-pack-ml-get-categories-execute]
--------------------------------------------------
[[java-rest-high-x-pack-ml-get-categories-execution-async]]
==== Asynchronous Execution
The request can also be executed asynchronously:
["source","java",subs="attributes,callouts,macros"]
--------------------------------------------------
include-tagged::{doc-tests}/MlClientDocumentationIT.java[x-pack-ml-get-categories-execute-async]
--------------------------------------------------
<1> The `GetCategoriesRequest` 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 with the `onResponse` method
if the execution is successful or the `onFailure` method if the execution
failed.
A typical listener for `GetCategoriesResponse` looks like:
["source","java",subs="attributes,callouts,macros"]
--------------------------------------------------
include-tagged::{doc-tests}/MlClientDocumentationIT.java[x-pack-ml-get-categories-listener]
--------------------------------------------------
<1> `onResponse` is called back when the action is completed successfully
<2> `onFailure` is called back when some unexpected error occurs
[[java-rest-high-snapshot-ml-get-categories-response]]
==== Get Categories Response
The returned `GetCategoriesResponse` contains the requested categories:
["source","java",subs="attributes,callouts,macros"]
--------------------------------------------------
include-tagged::{doc-tests}/MlClientDocumentationIT.java[x-pack-ml-get-categories-response]
--------------------------------------------------
<1> The count of categories that were matched
<2> The categories retrieved

2
docs/java-rest/high-level/supported-apis.asciidoc
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@ -226,6 +226,7 @@ The Java High Level REST Client supports the following Machine Learning APIs:
* <<java-rest-high-x-pack-ml-get-records>>
* <<java-rest-high-x-pack-ml-post-data>>
* <<java-rest-high-x-pack-ml-get-influencers>>
* <<java-rest-high-x-pack-ml-get-categories>>
include::ml/put-job.asciidoc[]
include::ml/get-job.asciidoc[]
@ -241,6 +242,7 @@ include::ml/get-overall-buckets.asciidoc[]
include::ml/get-records.asciidoc[]
include::ml/post-data.asciidoc[]
include::ml/get-influencers.asciidoc[]
include::ml/get-categories.asciidoc[]
== Migration APIs