85 lines
3.5 KiB
Plaintext
85 lines
3.5 KiB
Plaintext
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--
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:api: rollup-get-rollup-index-caps
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:request: GetRollupIndexCapsRequest
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:response: GetRollupIndexCapsResponse
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--
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[id="{upid}-x-pack-{api}"]
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=== Get Rollup Index Capabilities API
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The Get Rollup Index Capabilities API allows the user to determine if a concrete index or index pattern contains
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stored rollup jobs and data. If it contains data stored from rollup jobs, the capabilities of those jobs
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are returned. The API accepts a `GetRollupIndexCapsRequest` object as a request and returns a `GetRollupIndexCapsResponse`.
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[id="{upid}-x-pack-{api}-request"]
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==== Get Rollup Index Capabilities Request
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A +{request}+ requires a single parameter: the target index or index pattern (e.g. `rollup-foo`):
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["source","java",subs="attributes,callouts,macros"]
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--------------------------------------------------
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include-tagged::{doc-tests-file}[x-pack-{api}-request]
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--------------------------------------------------
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[id="{upid}-x-pack-{api}-execution"]
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==== Execution
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The Get Rollup Index Capabilities API can be executed through a `RollupClient`
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instance. Such instance can be retrieved from a `RestHighLevelClient`
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using the `rollup()` method:
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["source","java",subs="attributes,callouts,macros"]
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--------------------------------------------------
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include-tagged::{doc-tests-file}[x-pack-{api}-execute]
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--------------------------------------------------
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[id="{upid}-x-pack-{api}-response"]
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==== Response
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The returned +{response}+ holds lists and maps of values which correspond to the capabilities
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of the rollup index/index pattern (what jobs are stored in the index, their capabilities, what
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aggregations are available, etc). Because multiple jobs can be stored in one index, the
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response may include several jobs with different configurations.
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The capabilities are essentially the same as the original job configuration, just presented in a different
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manner. For example, if we had created a job with the following config:
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["source","java",subs="attributes,callouts,macros"]
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--------------------------------------------------
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include-tagged::{doc-tests-file}[x-pack-{api}-setup]
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--------------------------------------------------
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The +{response}+ object would contain the same information, laid out in a slightly different manner:
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["source","java",subs="attributes,callouts,macros"]
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--------------------------------------------------
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include-tagged::{doc-tests-file}[x-pack-{api}-response]
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--------------------------------------------------
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[id="{upid}-x-pack-{api}-async"]
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==== Asynchronous Execution
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This request can 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-file}[x-pack-{api}-execute-async]
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--------------------------------------------------
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<1> The +{request}+ to execute and the `ActionListener` to use when
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the execution completes
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The asynchronous method does not block and returns immediately. Once it is
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completed the `ActionListener` is called back using the `onResponse` method
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if the execution successfully completed or using the `onFailure` method if
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it failed.
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A typical listener for +{response}+ looks like:
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["source","java",subs="attributes,callouts,macros"]
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--------------------------------------------------
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include-tagged::{doc-tests-file}[x-pack-{api}-execute-listener]
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--------------------------------------------------
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<1> Called when the execution is successfully completed. The response is
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provided as an argument
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<2> Called in case of failure. The raised exception is provided as an argument
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