OpenSearch/docs/java-rest/high-level/licensing/start-trial.asciidoc

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[[java-rest-high-start-trial]]
=== Start Trial
[[java-rest-high-start-trial-execution]]
==== Execution
This API creates and enables a trial license using the `startTrial()`
method.
["source","java",subs="attributes,callouts,macros"]
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include-tagged::{doc-tests}/LicensingDocumentationIT.java[start-trial-execute]
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<1> Sets the "acknowledge" parameter to true, indicating the user has
acknowledged that starting a trial license may affect commercial features
[[java-rest-high-start-trial-response]]
==== Response
The returned `StartTrialResponse` returns a field indicating whether the
trial was started. If it was started, the response returns a the type of
license started. If it was not started, it returns an error message describing
why.
Acknowledgement messages may also be returned if this API was called without
the `acknowledge` flag set to `true`. In this case you need to display the
messages to the end user and if they agree, resubmit the request with the
`acknowledge` flag set to `true`. Please note that the response will still
return a 200 return code even if it requires an acknowledgement. So, it is
necessary to check the `acknowledged` flag.
["source","java",subs="attributes,callouts,macros"]
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include-tagged::{doc-tests}/LicensingDocumentationIT.java[start-trial-response]
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<1> Whether or not the request had the `acknowledge` flag set
<2> Whether or not this request caused a trial to start
<3> If this request caused a trial to start, which type of license it
registered
<4> If this request did not cause a trial to start, a message explaining why
<5> If the user's request did not have the `acknowledge` flag set, a summary
of the user's acknowledgement required for this API
<6> If the user's request did not have the `acknowledge` flag set, contains
keys of commercial features and values of messages describing how they will
be affected by licensing changes as the result of starting a trial
[[java-rest-high-start-trial-async]]
==== Asynchronous execution
This request can be executed asynchronously:
["source","java",subs="attributes,callouts,macros"]
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include-tagged::{doc-tests}/LicensingDocumentationIT.java[start-trial-execute-async]
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The asynchronous method does not block and returns immediately. Once it is
completed the `ActionListener` is called back using the `onResponse` method
if the execution successfully completed or using the `onFailure` method if
it failed.
A typical listener for `StartTrialResponse` looks like:
["source","java",subs="attributes,callouts,macros"]
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include-tagged::{doc-tests}/LicensingDocumentationIT.java[start-trial-execute-listener]
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<1> Called when the execution is successfully completed. The response is
provided as an argument
<2> Called in case of failure. The raised exception is provided as an argument