58 lines
2.5 KiB
Plaintext
58 lines
2.5 KiB
Plaintext
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[[java-rest-high-x-pack-ml-get-job]]
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=== Get Job API
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The Get Job API provides the ability to get {ml} jobs in the cluster.
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It accepts a `GetJobRequest` object and responds
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with a `GetJobResponse` object.
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[[java-rest-high-x-pack-ml-get-job-request]]
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==== Get Job Request
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A `GetJobRequest` object gets can have any number of `jobId` or `groupName`
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entries. However, they all must be non-null. An empty list is the same as
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requesting for all jobs.
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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-job-request]
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--------------------------------------------------
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<1> Constructing a new request referencing existing `jobIds`, can contain wildcards
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<2> Whether to ignore if a wildcard expression matches no jobs.
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(This includes `_all` string or when no jobs have been specified)
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[[java-rest-high-x-pack-ml-get-job-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-job-execute]
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--------------------------------------------------
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<1> `getCount()` from the `GetJobResponse` indicates the number of jobs found
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<2> `getJobs()` is the collection of {ml} `Job` objects found
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[[java-rest-high-x-pack-ml-get-job-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-job-execute-async]
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--------------------------------------------------
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<1> The `GetJobRequest` 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 `GetJobResponse` 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-job-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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