Module brave.context.log4j2
Package brave.context.log4j2

Class ThreadContextScopeDecorator

  • All Implemented Interfaces:
    CurrentTraceContext.ScopeDecorator
    public final class ThreadContextScopeDecorator
extends CorrelationFieldScopeDecorator
    Adds ThreadContext properties "traceId", "parentId", "spanId" and "sampled" when a span is current. "traceId" and "spanId" are used in log correlation. "parentId" is used for scenarios such as log parsing that reconstructs the trace tree. "sampled" is used as a hint that a span found in logs might be in Zipkin.

    Ex. 

    
 tracing = Tracing.newBuilder()
                  .currentTraceContext(ThreadLocalCurrentTraceContext.newBuilder()
                    .addScopeDecorator(ThreadContextScopeDecorator.create())
                    .build()
                  )
                  ...
                  .build();