Class OpencensusTracer (2.19.2)

public class OpencensusTracer extends BaseApiTracer

Implementation of ApiTracer that uses OpenCensus.

This implementation wraps an OpenCensus Span for every tracer and annotates that Span with various events throughout the lifecycle of the logical operation.

Each span will be named ClientName.MethodName and will have the following attributes:

attempt count: The Number of attempts sent before the logical operation completed
status: The status code of the last attempt
total response count: The number of messages received across all of the attempts. This will only be set for server streaming and bidi RPCs.
total request count: The number of messages sent across all of the attempts. This will only be set for client streaming and bidi RPCs.
batch count: For batch requests, the number of elements in the request.
batch size: For batch requests, the byte size of the request.

The spans will contain the following annotations:

Attempt cancelled with the following attributes:

attempt
Zero based sequential attempt number
attempt request count
The number of requests sent in this attempt. This will only be set for client streaming and bidi RPCs.
attempt response count
The number of responses received in this attempt. This will only be set for server streaming and bidi RPCs.
connection
The UUID of the connection which the attempt was sent.
Attempt failed, scheduling next attempt with the following attributes:

attempt
Zero based sequential attempt number
status
The status code of the failed attempt
delay
The number of milliseconds to wait before trying again
attempt request count
The number of requests sent in this attempt. This will only be set for client streaming and bidi RPCs.
attempt response count
The number of responses received in this attempt. This will only be set for server streaming and bidi RPCs.
connection
The UUID of the connection which the attempt was sent.
Attempts exhausted with the following attributes:

attempt
Zero based sequential attempt number
status
The status code of the failed attempt
attempt request count
The number of requests sent in this attempt. This will only be set for client streaming and bidi RPCs.
attempt response count
The number of responses received in this attempt. This will only be set for server streaming and bidi RPCs.
connection
The UUID of the connection which the attempt was sent.
Attempt failed, error not retryable with the following attributes:

attempt
Zero based sequential attempt number
status
The status code of the failed attempt
attempt request count
The number of requests sent in this attempt. This will only be set for client streaming and bidi RPCs.
attempt response count
The number of responses received in this attempt. This will only be set for server streaming and bidi RPCs.
connection
The UUID of the connection which the attempt was sent.
Attempt succeeded with the following attributes:

attempt
Zero based sequential attempt number
attempt request count
The number of requests sent in this attempt. This will only be set for client streaming and bidi RPCs.
attempt response count
The number of responses received in this attempt. This will only be set for server streaming and bidi RPCs.
connection
The UUID of the connection which the attempt was sent.

Long running operations, which are composed of an initial RPC to start the operation and a number of polling RPCs will be represented as a tree of spans. The top level span will be named after the initial RPC name suffixed with "Operation" and will have the following annotations:

Operation started
Operation failed to start with the following attributes:

status
The status code of why the operation failed to start
Polling was cancelled with the following attributes:

attempt
Zero based sequential poll number.
attempt request count
Scheduling next poll with the following attributes:

attempt
Zero based sequential poll number
status
OK if the poll succeeded, but the operation is still running.
delay
The number of milliseconds to wait before polling again
Polling attempts exhausted with the following attributes:

attempt
Zero based sequential poll number
status
OK if the poll succeeded, but the operation is still running.
Polling failed with the following attributes:

attempt
Zero based sequential poll number
status
OK if the poll succeeded, but the operation is still running.
Polling completed with the following attributes:

attempt
Zero based sequential poll number

The toplevel long running operation span will also contain child spans to describe the retry attempts for the initial RPC and each poll as described in the general span section above.

This class is thread compatible. It expects callers to follow grpc's threading model: there is only one thread that invokes the operation* and attempt* methods. Please see com.google.api.gax.rpc.ApiStreamObserver for more information.

Inheritance

Object > BaseApiTracer > OpencensusTracer

Inherited Members

BaseApiTracer.attemptCancelled()

BaseApiTracer.attemptFailed(Throwable,Duration)

BaseApiTracer.attemptFailedRetriesExhausted(Throwable)

BaseApiTracer.attemptPermanentFailure(Throwable)

BaseApiTracer.attemptStarted(int)

BaseApiTracer.attemptStarted(Object,int)

BaseApiTracer.attemptSucceeded()

BaseApiTracer.batchRequestSent(long,long)

BaseApiTracer.connectionSelected(String)

BaseApiTracer.getInstance()

BaseApiTracer.inScope()

BaseApiTracer.lroStartFailed(Throwable)

BaseApiTracer.lroStartSucceeded()

BaseApiTracer.operationCancelled()

BaseApiTracer.operationFailed(Throwable)

BaseApiTracer.operationSucceeded()

BaseApiTracer.requestSent()

BaseApiTracer.responseReceived()

Object.clone()

Object.equals(Object)

Object.finalize()

Object.getClass()

Object.hashCode()

Object.notify()

Object.notifyAll()

Object.toString()

Object.wait()

Object.wait(long)

Object.wait(long,int)

Methods

attemptCancelled()

public void attemptCancelled()

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

Overrides

BaseApiTracer.attemptCancelled()

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.

Parameters

Name	Description
error	`Throwable`
delay	`org.threeten.bp.Duration`

Overrides

BaseApiTracer.attemptFailed(Throwable error, Duration delay)

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.

Parameter

Name	Description
error	`Throwable`

Overrides

BaseApiTracer.attemptFailedRetriesExhausted(Throwable error)

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.

Parameter

Name	Description
error	`Throwable`

Overrides

BaseApiTracer.attemptPermanentFailure(Throwable error)

attemptStarted(int attemptNumber)

public void attemptStarted(int attemptNumber)

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`

Overrides

BaseApiTracer.attemptStarted(int attemptNumber)

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.

Parameters

Name	Description
request	`Object`
attemptNumber	`int`

Overrides

BaseApiTracer.attemptStarted(Object request, int attemptNumber)

attemptSucceeded()

public void attemptSucceeded()

Adds an annotation that the attempt succeeded.

Overrides

BaseApiTracer.attemptSucceeded()

batchRequestSent(long elementCount, long requestSize)

public void batchRequestSent(long elementCount, long requestSize)

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

Parameters

Name	Description
elementCount	`long`
requestSize	`long`

Overrides

BaseApiTracer.batchRequestSent(long elementCount, long requestSize)

connectionSelected(String id)

public void connectionSelected(String id)

Annotates the operation with selected connection id from the ChannelPool.

Parameter

Name	Description
id	`String`

Overrides

BaseApiTracer.connectionSelected(String id)

inScope()

public 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

Overrides

BaseApiTracer.inScope()

lroStartFailed(Throwable error)

public void lroStartFailed(Throwable error)

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

Parameter

Name	Description
error	`Throwable`

Overrides

BaseApiTracer.lroStartFailed(Throwable error)

lroStartSucceeded()

public void lroStartSucceeded()

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

Overrides

BaseApiTracer.lroStartSucceeded()

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.

Overrides

BaseApiTracer.operationCancelled()

operationFailed(Throwable error)

public 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`

Overrides

BaseApiTracer.operationFailed(Throwable error)

operationSucceeded()

public void operationSucceeded()

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

Overrides

BaseApiTracer.operationSucceeded()

requestSent()

public void requestSent()

Adds an annotation that a streaming request has been sent.

Overrides

BaseApiTracer.requestSent()

responseReceived()

public void responseReceived()

Adds an annotation that a streaming response has been received.

Overrides

BaseApiTracer.responseReceived()