本文整理了Java中brave.propagation.TraceContext.findExtra()方法的一些代码示例，展示了TraceContext.findExtra()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。TraceContext.findExtra()方法的具体详情如下：
包路径：brave.propagation.TraceContext
类名称：TraceContext
方法名：findExtra

TraceContext.findExtra介绍

[英]Returns an #extra() of the given type if present or null if not.

Note: it is the responsibility of Propagation.Factory#decorate(TraceContext)to consolidate extra fields. If it doesn't, there could be multiple instance of a given type and this can break logic.
[中]

代码示例

代码示例来源：origin: openzipkin/brave

/** Returns the value of the field with the specified key or null if not available */
public static String get(TraceContext context, String name,
  Class<? extends PropagationFields> type) {
 if (context == null) throw new NullPointerException("context == null");
 if (name == null) throw new NullPointerException("name == null");
 PropagationFields fields = context.findExtra(type);
 return fields != null ? fields.get(name) : null;
}

代码示例来源：origin: openzipkin/brave

/** Replaces the value of the field with the specified key, ignoring if not a permitted field */
 public static void put(TraceContext context, String name, String value,
   Class<? extends PropagationFields> type) {
  if (context == null) throw new NullPointerException("context == null");
  if (name == null) throw new NullPointerException("name == null");
  if (value == null) throw new NullPointerException("value == null");
  PropagationFields fields = context.findExtra(type);
  if (fields == null) return;
  fields.put(name, value);
 }
}

代码示例来源：origin: openzipkin/brave

/**
 * Returns an {@linkplain #extra() extra} of the given type if present or null if not.
 *
 * <p>Note: it is the responsibility of {@link Propagation.Factory#decorate(TraceContext)}
 * to consolidate extra fields. If it doesn't, there could be multiple instance of a given type
 * and this can break logic.
 */
public @Nullable <T> T findExtra(Class<T> type) {
 return findExtra(type, extra);
}

代码示例来源：origin: openzipkin/brave

/** Returns a mapping of any fields in the trace context. */
public static Map<String, String> getAll(TraceContext context) {
 if (context == null) throw new NullPointerException("context == null");
 PropagationFields fields = context.findExtra(Extra.class);
 return fields != null ? fields.toMap() : Collections.emptyMap();
}

代码示例来源：origin: openzipkin/brave

@Override public void inject(TraceContext traceContext, C carrier) {
 delegate.inject(traceContext, carrier);
 Extra extra = traceContext.findExtra(Extra.class);
 if (extra == null) return;
 inject(extra, carrier);
}

代码示例来源：origin: openzipkin/brave

/** Returns a mapping of any fields in the extraction result. */
public static Map<String, String> getAll(TraceContextOrSamplingFlags extracted) {
 if (extracted == null) throw new NullPointerException("extracted == null");
 TraceContext extractedContext = extracted.context();
 if (extractedContext != null) return getAll(extractedContext);
 PropagationFields fields = TraceContext.findExtra(Extra.class, extracted.extra());
 return fields != null ? fields.toMap() : Collections.emptyMap();
}

代码示例来源：origin: openzipkin/brave

@Override public void inject(TraceContext traceContext, C carrier) {
  if (carrier instanceof Metadata) {
   byte[] serialized = TraceContextBinaryFormat.toBytes(traceContext);
   ((Metadata) carrier).put(GRPC_TRACE_BIN, serialized);
   Tags tags = traceContext.findExtra(Tags.class);
   if (tags != null) ((Metadata) carrier).put(GRPC_TAGS_BIN, tags.toMap());
  }
  delegate.inject(traceContext, carrier);
 }
}

代码示例来源：origin: openzipkin/brave

@Override
public <ReqT, RespT> ServerCall.Listener<ReqT> interceptCall(final ServerCall<ReqT, RespT> call,
  final Metadata headers, final ServerCallHandler<ReqT, RespT> next) {
 TraceContextOrSamplingFlags extracted = extractor.extract(headers);
 Span span = extracted.context() != null
   ? tracer.joinSpan(extracted.context())
   : tracer.nextSpan(extracted);
 // If grpc propagation is enabled, make sure we refresh the server method
 if (grpcPropagationFormatEnabled) {
  Tags tags = span.context().findExtra(Tags.class);
  if (tags != null) tags.put(RPC_METHOD, call.getMethodDescriptor().getFullMethodName());
 }
 span.kind(Span.Kind.SERVER);
 parser.onStart(call, headers, span.customizer());
 // startCall invokes user interceptors, so we place the span in scope here
 ServerCall.Listener<ReqT> result;
 SpanInScope scope = tracer.withSpanInScope(span);
 try { // retrolambda can't resolve this try/finally
  result = next.startCall(new TracingServerCall<>(span, call, parser), headers);
 } catch (RuntimeException | Error e) {
  span.error(e);
  span.finish();
  throw e;
 } finally {
  scope.close();
 }
 // This ensures the server implementation can see the span in scope
 return new ScopingServerCallListener<>(tracer, span, result, parser);
}

代码示例来源：origin: io.zipkin.brave/brave

/** Replaces the value of the field with the specified key, ignoring if not a permitted field */
 public static void put(TraceContext context, String name, String value,
   Class<? extends PropagationFields> type) {
  if (context == null) throw new NullPointerException("context == null");
  if (name == null) throw new NullPointerException("name == null");
  if (value == null) throw new NullPointerException("value == null");
  PropagationFields fields = context.findExtra(type);
  if (fields == null) return;
  fields.put(name, value);
 }
}

代码示例来源：origin: io.zipkin.brave/brave

/** Returns the value of the field with the specified key or null if not available */
public static String get(TraceContext context, String name,
  Class<? extends PropagationFields> type) {
 if (context == null) throw new NullPointerException("context == null");
 if (name == null) throw new NullPointerException("name == null");
 PropagationFields fields = context.findExtra(type);
 return fields != null ? fields.get(name) : null;
}

代码示例来源：origin: io.zipkin.brave/brave

/** Returns a mapping of any fields in the trace context. */
public static Map<String, String> getAll(TraceContext context) {
 if (context == null) throw new NullPointerException("context == null");
 PropagationFields fields = context.findExtra(Extra.class);
 return fields != null ? fields.toMap() : Collections.emptyMap();
}

代码示例来源：origin: io.zipkin.brave/brave

/**
 * Returns an {@linkplain #extra() extra} of the given type if present or null if not.
 *
 * <p>Note: it is the responsibility of {@link Propagation.Factory#decorate(TraceContext)}
 * to consolidate extra fields. If it doesn't, there could be multiple instance of a given type
 * and this can break logic.
 */
public @Nullable <T> T findExtra(Class<T> type) {
 return findExtra(type, extra);
}

代码示例来源：origin: io.zipkin.brave/brave

@Override public void inject(TraceContext traceContext, C carrier) {
 delegate.inject(traceContext, carrier);
 Extra extra = traceContext.findExtra(Extra.class);
 if (extra == null) return;
 inject(extra, carrier);
}

代码示例来源：origin: io.zipkin.brave/brave

/** Returns a mapping of any fields in the extraction result. */
public static Map<String, String> getAll(TraceContextOrSamplingFlags extracted) {
 if (extracted == null) throw new NullPointerException("extracted == null");
 TraceContext extractedContext = extracted.context();
 if (extractedContext != null) return getAll(extractedContext);
 PropagationFields fields = TraceContext.findExtra(Extra.class, extracted.extra());
 return fields != null ? fields.toMap() : Collections.emptyMap();
}

代码示例来源：origin: io.zipkin.brave/brave-instrumentation-grpc

@Override public void inject(TraceContext traceContext, C carrier) {
  if (carrier instanceof Metadata) {
   byte[] serialized = TraceContextBinaryFormat.toBytes(traceContext);
   ((Metadata) carrier).put(GRPC_TRACE_BIN, serialized);
   Tags tags = traceContext.findExtra(Tags.class);
   if (tags != null) ((Metadata) carrier).put(GRPC_TAGS_BIN, tags.toMap());
  }
  delegate.inject(traceContext, carrier);
 }
}

代码示例来源：origin: io.zipkin.brave/brave-instrumentation-grpc

@Override
public <ReqT, RespT> ServerCall.Listener<ReqT> interceptCall(final ServerCall<ReqT, RespT> call,
  final Metadata headers, final ServerCallHandler<ReqT, RespT> next) {
 TraceContextOrSamplingFlags extracted = extractor.extract(headers);
 Span span = extracted.context() != null
   ? tracer.joinSpan(extracted.context())
   : tracer.nextSpan(extracted);
 // If grpc propagation is enabled, make sure we refresh the server method
 if (grpcPropagationFormatEnabled) {
  Tags tags = span.context().findExtra(Tags.class);
  if (tags != null) tags.put(RPC_METHOD, call.getMethodDescriptor().getFullMethodName());
 }
 span.kind(Span.Kind.SERVER);
 parser.onStart(call, headers, span.customizer());
 // startCall invokes user interceptors, so we place the span in scope here
 ServerCall.Listener<ReqT> result;
 SpanInScope scope = tracer.withSpanInScope(span);
 try { // retrolambda can't resolve this try/finally
  result = next.startCall(new TracingServerCall<>(span, call, parser), headers);
 } catch (RuntimeException | Error e) {
  span.error(e);
  span.finish();
  throw e;
 } finally {
  scope.close();
 }
 // This ensures the server implementation can see the span in scope
 return new ScopingServerCallListener<>(tracer, span, result, parser);
}