The onFailure method from ActionListener is necessary for integrating AD plugin. This will be implemented through a Transport API between OpenSearch and the SDK.

Tasks:

• Create sendActionListenerOnFailureRequest method in ExtensionsRunner.java that will send the request to OpenSearch

• Create handleActionListenerOnFailureRequest method in ExtensionsOrchestrator.java that will call listener.onFailure(Exception e) and send an ack back to the SDK

• Create handleActionListenerOnFailureRequest method in ExtensionsRunner.java that will receive the ack and print a confirmation

• Add unit tests for the methods above