Module io.vertx.core

Package io.vertx.core.spi.tracing

Interface VertxTracer<I,O>

public interface VertxTracer<I,O>

The tracer SPI used by Vert.x components to report activities.

Author:

Julien Viet

Field Summary

Fields

Modifier and Type	Field	Description
static final VertxTracer	NOOP	Noop tracer.

Method Summary

Modifier and Type	Method	Description
default void	close()	Close the tracer.
default <R> I	receiveRequest(Context context, SpanKind kind, TracingPolicy policy, R request, String operation, Iterable<Map.Entry<String,String>> headers, TagExtractor<R> tagExtractor)	Signal a request has been received and will be processed.
default <R> void	receiveResponse(Context context, R response, O payload, Throwable failure, TagExtractor<R> tagExtractor)	Signal a response has been received.
default <R> O	sendRequest(Context context, SpanKind kind, TracingPolicy policy, R request, String operation, BiConsumer<String,String> headers, TagExtractor<R> tagExtractor)	Signal a request is sent.
default <R> void	sendResponse(Context context, R response, I payload, Throwable failure, TagExtractor<R> tagExtractor)	Signal the response is sent.

Field Details

NOOP

static final VertxTracer NOOP

Noop tracer.

Method Details

receiveRequest

default <R> I receiveRequest(Context context,
 SpanKind kind,
 TracingPolicy policy,
 R request,
 String operation,
 Iterable<Map.Entry<String,String>> headers,
 TagExtractor<R> tagExtractor)

Signal a request has been received and will be processed.

Parameters:

context - the context data attached to the request

kind - the span kind

policy - the policy to apply

request - the request object

operation - the request operation

headers - a read-only view of the request headers

tagExtractor - the request tag extractor

Returns:

the request trace

sendResponse

default <R> void sendResponse(Context context,
 R response,
 I payload,
 Throwable failure,
 TagExtractor<R> tagExtractor)

Signal the response is sent.

Parameters:

context - the context data attached to the request

response - the response sent

payload - the payload returned by receiveRequest(io.vertx.core.Context, io.vertx.core.spi.tracing.SpanKind, io.vertx.core.tracing.TracingPolicy, R, java.lang.String, java.lang.Iterable<java.util.Map.Entry<java.lang.String, java.lang.String>>, io.vertx.core.spi.tracing.TagExtractor<R>)

failure - the failure when not null

tagExtractor - the response tag extractor

sendRequest

default <R> O sendRequest(Context context,
 SpanKind kind,
 TracingPolicy policy,
 R request,
 String operation,
 BiConsumer<String,String> headers,
 TagExtractor<R> tagExtractor)

Signal a request is sent.

When the method returns null, no propagation happens and the client shall not call receiveResponse(io.vertx.core.Context, R, O, java.lang.Throwable, io.vertx.core.spi.tracing.TagExtractor<R>).

Parameters:

context - the context data attached to the request

kind - the span kind

policy - the policy to apply

request - the request object

operation - the request operation

headers - a write only-view of the request headers

tagExtractor - the request tag extractor

Returns:

the request trace

receiveResponse

default <R> void receiveResponse(Context context,
 R response,
 O payload,
 Throwable failure,
 TagExtractor<R> tagExtractor)

Signal a response has been received.

Parameters:

context - the context data attached to the request

response - the response sent

payload - the payload returned by sendRequest(io.vertx.core.Context, io.vertx.core.spi.tracing.SpanKind, io.vertx.core.tracing.TracingPolicy, R, java.lang.String, java.util.function.BiConsumer<java.lang.String, java.lang.String>, io.vertx.core.spi.tracing.TagExtractor<R>)

failure - the failure when not null

tagExtractor - the response tag extractor

close

default void close()

Close the tracer.