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public
class
MetricsTracer
implements
ApiTracer
This class computes generic metrics that can be observed in the lifecycle of an RPC operation. The responsibility of recording metrics should delegate to MetricsRecorder , hence this class should not have any knowledge about the observability framework used for metrics recording.
Implements
ApiTracerConstructors
MetricsTracer(MethodName methodName, MetricsRecorder metricsRecorder)
public
MetricsTracer
(
MethodName
methodName
,
MetricsRecorder
metricsRecorder
)
Methods
addAttributes(String key, String value)
public
void
addAttributes
(
String
key
,
String
value
)
Add attributes that will be attached to all metrics. This is expected to be called by handwritten client teams to add additional attributes that are not supposed be collected by Gax.
attemptCancelled()
public
void
attemptCancelled
()
Add an annotation that the attempt was cancelled by the user. Cancelled attempt add "CANCELLED" to the status attribute key.
attemptFailed(Throwable error, Duration delay)
public
void
attemptFailed
(
Throwable
error
,
Duration
delay
)
Adds an annotation that the attempt failed, but another attempt will be made after the delay.
error
delay
org.threeten.bp.Duration
the amount of time to wait before the next attempt will start.
Failed attempt extracts the error from the throwable and adds it to the status attribute key.
attemptFailedRetriesExhausted(Throwable error)
public
void
attemptFailedRetriesExhausted
(
Throwable
error
)
Adds an annotation that the attempt failed and that no further attempts will be made because retry limits have been reached. This extracts the error from the throwable and adds it to the status attribute key.
attemptPermanentFailure(Throwable error)
public
void
attemptPermanentFailure
(
Throwable
error
)
Adds an annotation that the attempt failed and that no further attempts will be made because the last error was not retryable. This extracts the error from the throwable and adds it to the status attribute key.
attemptStarted(Object request, int attemptNumber)
public
void
attemptStarted
(
Object
request
,
int
attemptNumber
)
Adds an annotation that an attempt is about to start with additional information from the request. In general this should occur at the very start of the operation. The attemptNumber is zero based. So the initial attempt will be 0. When the attempt starts, the attemptTimer starts the stopwatch.
attemptSucceeded()
public
void
attemptSucceeded
()
Adds an annotation that the attempt succeeded. Successful attempt add "OK" value to the status attribute key.
operationCancelled()
public
void
operationCancelled
()
Signals that the operation was cancelled by the user. The tracer is now considered closed and should no longer be used. Cancelled operation adds "CANCELLED" value to the status attribute key.
operationFailed(Throwable error)
public
void
operationFailed
(
Throwable
error
)
Signals that the operation was cancelled by the user. The tracer is now considered closed and should no longer be used. Failed operation extracts the error from the throwable and adds it to the status attribute key.
operationSucceeded()
public
void
operationSucceeded
()
Signals that the overall operation has finished successfully. The tracer is now considered closed and should no longer be used. Successful operation adds "OK" value to the status attribute key.
