Interface ApiTracer (2.16.0)

Version 2.16.0

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public interface ApiTracer

Implementations of this class trace the logical flow of a google cloud client.

A single instance of a tracer represents a logical operation that can be annotated throughout its lifecycle. Constructing an instance of a subclass will implicitly signal the start of a new operation.

For internal use only. google-cloud-java libraries should extend BaseApiTracer.

Methods

attemptCancelled()

public abstract void attemptCancelled()

Add an annotation that the attempt was cancelled by the user.

attemptFailed(Throwable error, Duration delay)

public abstract void attemptFailed(Throwable error, Duration delay)

Adds an annotation that the attempt failed, but another attempt will be made after the delay.

Parameters

Name	Description
error	Throwable the transient error that caused the attempt to fail.
delay	org.threeten.bp.Duration the amount of time to wait before the next attempt will start.

attemptFailedRetriesExhausted(Throwable error)

public abstract 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.

Parameter

Name	Description
error	Throwable the last error received before retries were exhausted.

attemptPermanentFailure(Throwable error)

public abstract 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.

Parameter

Name	Description
error	Throwable the error that caused the final attempt to fail.

attemptStarted(int attemptNumber) (deprecated)

public abstract void attemptStarted(int attemptNumber)

Deprecated. Please use #attemptStarted(Object, int) instead.

Adds an annotation that an attempt is about to start. In general this should occur at the very start of the operation. The attemptNumber is zero based. So the initial attempt will be 0.

Parameter

Name	Description
attemptNumber	int the zero based sequential attempt number.

attemptStarted(Object request, int attemptNumber)

public abstract 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.

Parameters

Name	Description
request	Object request of this attempt.
attemptNumber	int the zero based sequential attempt number.

attemptSucceeded()

public abstract void attemptSucceeded()

Adds an annotation that the attempt succeeded.

batchRequestSent(long elementCount, long requestSize)

public abstract void batchRequestSent(long elementCount, long requestSize)

Adds an annotation that a batch of writes has been flushed.

Parameters

Name	Description
elementCount	long the number of elements in the batch.
requestSize	long the size of the batch in bytes.

connectionSelected(String id)

public abstract void connectionSelected(String id)

Annotates the operation with selected connection id from the ChannelPool.

Parameter

Name	Description
id	String the local connection identifier of the selected connection.

inScope()

public abstract ApiTracer.Scope inScope()

Asks the underlying implementation to install itself as a thread local. This allows for interop between clients using gax and external resources to share the same implementation of the tracing. For example OpenCensus will install a thread local that can read by the GRPC.

Returns

Type	Description
ApiTracer.Scope

lroStartFailed(Throwable error)

public abstract void lroStartFailed(Throwable error)

Signals that the initial RPC for the long running operation failed.

Parameter

Name	Description
error	Throwable the error that caused the long running operation fail.

lroStartSucceeded()

public abstract void lroStartSucceeded()

Signals that the initial RPC successfully started the long running operation. The long running operation will now be polled for completion.

operationCancelled()

public abstract void operationCancelled()

Signals that the operation was cancelled by the user. The tracer is now considered closed and should no longer be used.

operationFailed(Throwable error)

public abstract void operationFailed(Throwable error)

Signals that the overall operation has failed and no further attempts will be made. The tracer is now considered closed and should no longer be used.

Parameter

Name	Description
error	Throwable the final error that caused the operation to fail.

operationSucceeded()

public abstract void operationSucceeded()

Signals that the overall operation has finished successfully. The tracer is now considered closed and should no longer be used.

requestSent()

public abstract void requestSent()

Adds an annotation that a streaming request has been sent.

responseReceived()

public abstract void responseReceived()

Adds an annotation that a streaming response has been received.