The Get Datafeed Stats API provides the ability to get any number of
machine learning datafeed’s statistics in the cluster.
It accepts a
GetDatafeedStatsRequest object and responds
GetDatafeedStatsRequest object can have any number of
entries. However, they all must be non-null. An empty list is the same as
requesting statistics for all datafeeds.
When executing a
GetDatafeedStatsRequest in the following manner, the client waits
GetDatafeedStatsResponse to be returned before continuing with code execution:
GetDatafeedStatsResponse response = client.machineLearning().getDatafeedStats(request, RequestOptions.DEFAULT);
Synchronous calls may throw an
IOException in case of either failing to
parse the REST response in the high-level REST client, the request times out
or similar cases where there is no response coming back from the server.
In cases where the server returns a
5xx error code, the high-level
client tries to parse the response body error details instead and then throws
ElasticsearchException and adds the original
ResponseException as a
suppressed exception to it.
GetDatafeedStatsRequest can also be done in an asynchronous fashion so that
the client can return directly. Users need to specify how the response or
potential failures will be handled by passing the request and a listener to the
asynchronous get-datafeed-stats method:
The asynchronous method does not block and returns immediately. Once it is
ActionListener is called back using the
if the execution successfully completed or using the
onFailure method if
it failed. Failure scenarios and expected exceptions are the same as in the
synchronous execution case.
A typical listener for
get-datafeed-stats looks like:
GetDatafeedStatsResponse contains the requested datafeed statistics: