MetricOperationTracer tracks the lifecycle and metadata of a single gRPC spanner operation, which may consist of multiple attempts.
This class is responsible for:
Usage:
start() to reset the operation's start time.createNewAttempt() to begin tracking a new attempt within the operation.currentAttempt to retrieve the current MetricAttemptTracer instance.attemptCount to get the number of attempts made so far.startTime to get the operation's start time.status to track the operation's final status code.Returns the number of attempts made for this operation.
Returns the current MetricAttemptTracer instance for the ongoing attempt.
Returns the start time of the operation.
Increments the attempt count and creates a new MetricAttemptTracer for tracking the next attempt within this operation.