67 lines
3.1 KiB
Plaintext
67 lines
3.1 KiB
Plaintext
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[[java-rest-high-x-pack-ml-get-datafeed-stats]]
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=== Get Datafeed Stats API
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The Get Datafeed Stats API provides the ability to get any number of
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{ml} datafeed's statistics in the cluster.
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It accepts a `GetDatafeedStatsRequest` object and responds
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with a `GetDatafeedStatsResponse` object.
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[[java-rest-high-x-pack-ml-get-datafeed-stats-request]]
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==== Get Datafeed Stats Request
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A `GetDatafeedStatsRequest` object can have any number of `datafeedId`
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entries. However, they all must be non-null. An empty list is the same as
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requesting statistics for all datafeeds.
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["source","java",subs="attributes,callouts,macros"]
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--------------------------------------------------
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include-tagged::{doc-tests}/MlClientDocumentationIT.java[x-pack-ml-get-datafeed-stats-request]
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--------------------------------------------------
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<1> Constructing a new request referencing existing `datafeedIds`, can contain wildcards
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<2> Whether to ignore if a wildcard expression matches no datafeeds.
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(This includes `_all` string or when no datafeeds have been specified)
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[[java-rest-high-x-pack-ml-get-datafeed-stats-execution]]
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==== Execution
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The request can be executed through the `MachineLearningClient` contained
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in the `RestHighLevelClient` object, accessed via the `machineLearningClient()` method.
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["source","java",subs="attributes,callouts,macros"]
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--------------------------------------------------
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include-tagged::{doc-tests}/MlClientDocumentationIT.java[x-pack-ml-get-datafeed-stats-execute]
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--------------------------------------------------
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[[java-rest-high-x-pack-ml-get-datafeed-stats-execution-async]]
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==== Asynchronous Execution
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The request can also be executed asynchronously:
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["source","java",subs="attributes,callouts,macros"]
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--------------------------------------------------
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include-tagged::{doc-tests}/MlClientDocumentationIT.java[x-pack-ml-get-datafeed-stats-execute-async]
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--------------------------------------------------
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<1> The `GetDatafeedStatsRequest` to execute and the `ActionListener` to use when
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the execution completes
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The method does not block and returns immediately. The passed `ActionListener` is used
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to notify the caller of completion. A typical `ActionListener` for `GetDatafeedStatsResponse` may
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look like
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["source","java",subs="attributes,callouts,macros"]
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--------------------------------------------------
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include-tagged::{doc-tests}/MlClientDocumentationIT.java[x-pack-ml-get-datafeed-stats-listener]
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--------------------------------------------------
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<1> `onResponse` is called back when the action is completed successfully
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<2> `onFailure` is called back when some unexpected error occurs
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[[java-rest-high-x-pack-ml-get-datafeed-stats-response]]
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==== Get Datafeed Stats Response
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The returned `GetDatafeedStatsResponse` contains the requested datafeed statistics:
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["source","java",subs="attributes,callouts,macros"]
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--------------------------------------------------
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include-tagged::{doc-tests}/MlClientDocumentationIT.java[x-pack-ml-get-datafeed-stats-response]
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--------------------------------------------------
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<1> `count()` indicates the number of datafeeds statistics found
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<2> `datafeedStats()` is the collection of {ml} `DatafeedStats` objects found
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