97 lines
4.4 KiB
Plaintext
97 lines
4.4 KiB
Plaintext
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[[java-rest-high-get-settings]]
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=== Get Settings API
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[[java-rest-high-get-settings-request]]
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==== Get Settings Request
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A `GetSettingsRequest` requires one or more `index` arguments:
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["source","java",subs="attributes,callouts,macros"]
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--------------------------------------------------
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include-tagged::{doc-tests}/IndicesClientDocumentationIT.java[get-settings-request]
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--------------------------------------------------
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<1> The index whose settings we should retrieve
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==== Optional arguments
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The following arguments can optionally be provided:
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["source","java",subs="attributes,callouts,macros"]
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--------------------------------------------------
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include-tagged::{doc-tests}/IndicesClientDocumentationIT.java[get-settings-request-names]
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--------------------------------------------------
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<1> One or more settings that be the only settings retrieved. If unset, all settings will be retrieved
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["source","java",subs="attributes,callouts,macros"]
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--------------------------------------------------
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include-tagged::{doc-tests}/IndicesClientDocumentationIT.java[get-settings-request-include-defaults]
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--------------------------------------------------
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<1> If true, defaults will be returned for settings not explicitly set on the index
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["source","java",subs="attributes,callouts,macros"]
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--------------------------------------------------
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include-tagged::{doc-tests}/IndicesClientDocumentationIT.java[get-settings-request-indicesOptions]
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--------------------------------------------------
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<1> Setting `IndicesOptions` controls how unavailable indices are resolved and
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how wildcard expressions are expanded
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[[java-rest-high-get-settings-sync]]
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==== Synchronous Execution
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["source","java",subs="attributes,callouts,macros"]
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--------------------------------------------------
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include-tagged::{doc-tests}/IndicesClientDocumentationIT.java[get-settings-execute]
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--------------------------------------------------
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[[java-rest-high-get-settings-async]]
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==== Asynchronous Execution
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The asynchronous execution of a Get Settings request requires both the `GetSettingsRequest`
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instance and an `ActionListener` instance to be passed to the asynchronous
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method:
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["source","java",subs="attributes,callouts,macros"]
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--------------------------------------------------
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include-tagged::{doc-tests}/IndicesClientDocumentationIT.java[get-settings-execute-async]
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--------------------------------------------------
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<1> The `GetSettingsRequest` 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 `GetSettingsResponse` looks like:
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["source","java",subs="attributes,callouts,macros"]
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--------------------------------------------------
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include-tagged::{doc-tests}/IndicesClientDocumentationIT.java[get-settings-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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[[java-rest-high-get-settings-response]]
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==== Get Settings Response
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The returned `GetSettingsResponse` allows to retrieve information about the
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executed operation as follows:
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["source","java",subs="attributes,callouts,macros"]
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--------------------------------------------------
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include-tagged::{doc-tests}/IndicesClientDocumentationIT.java[get-settings-response]
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--------------------------------------------------
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<1> We can retrieve the setting value for a particular index directly from the response as a string
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<2> We can also retrieve the Settings object for a particular index for further examination
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<3> The returned Settings object provides convenience methods for non String types
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If the `includeDefaults` flag was set to true in the `GetSettingsRequest`, the
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behavior of `GetSettingsResponse` will differ somewhat.
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["source","java",subs="attributes,callouts,macros"]
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--------------------------------------------------
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include-tagged::{doc-tests}/IndicesClientDocumentationIT.java[get-settings-defaults-response]
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--------------------------------------------------
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<1> Individual default setting values may be retrieved directly from the `GetSettingsResponse`
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<2> We may retrieve a Settings object for an index that contains those settings with default values
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