BloombergLP::bmqpi::DTContext Class Reference

A pure interface for a context with a notion of a current span.

#include <bmqpi_dtcontext.h>

Public Member Functions
virtual	~DTContext ()
	Destructor.
virtual bsl::shared_ptr< bmqpi::DTSpan >	span () const =0
virtual bslma::ManagedPtr< void >	scope (const bsl::shared_ptr< DTSpan > &newSpan)=0

Constructor & Destructor Documentation

~DTContext()

virtual BloombergLP::bmqpi::DTContext::~DTContext ( )

virtual

Member Function Documentation

span()

virtual bsl::shared_ptr< bmqpi::DTSpan > BloombergLP::bmqpi::DTContext::span ( ) const

pure virtual

Returns the current DTSpan for the calling thread according to this DTContext, or an empty shared_ptr if no span is currently set.

scope()

virtual bslma::ManagedPtr< void > BloombergLP::bmqpi::DTContext::scope ( const bsl::shared_ptr< DTSpan > &  newSpan )

pure virtual

Letting previous = span() on some thread T, returns an object token which promises:

• span() will return newSpan when called on thread T, following the construction of token.
• span() will return previous when called on thread T, following the destruction of token.

Note that if token2 = scope(otherSpan) is called on thread T during the lifetime of token, then span() will return otherSpan. After token2 is destroyed, it will again return newSpan.

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The documentation for this class was generated from the following file:

• bmqpi/bmqpi_dtcontext.h