Interface RequestMetadataCallback (1.18.0)

public interface RequestMetadataCallback

The callback that receives the result of the asynchronous Credentials#getRequestMetadata(java.net.URI, java.util.concurrent.Executor, RequestMetadataCallback). Exactly one method should be called.

Methods

onFailure(Throwable exception)

public abstract void onFailure(Throwable exception)

Called when metadata generation failed.

Parameter
Name	Description
`exception`	`Throwable` The thrown exception which caused the request metadata fetch to fail.

onSuccess(Map<String,List<String>> metadata)

public abstract void onSuccess(Map<String,List<String>> metadata)

Called when metadata is successfully produced.

Parameter
Name	Description
`metadata`	`Map<String,List<String>>` Metadata returned for the request.

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Last updated 2025-01-08 UTC.