dubbo.apache.org/dubbo-go/v3@v3.1.1/protocol/dubbo/opentracing.go (about)

     1  /*
     2   * Licensed to the Apache Software Foundation (ASF) under one or more
     3   * contributor license agreements.  See the NOTICE file distributed with
     4   * this work for additional information regarding copyright ownership.
     5   * The ASF licenses this file to You under the Apache License, Version 2.0
     6   * (the "License"); you may not use this file except in compliance with
     7   * the License.  You may obtain a copy of the License at
     8   *
     9   *     http://www.apache.org/licenses/LICENSE-2.0
    10   *
    11   * Unless required by applicable law or agreed to in writing, software
    12   * distributed under the License is distributed on an "AS IS" BASIS,
    13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    14   * See the License for the specific language governing permissions and
    15   * limitations under the License.
    16   */
    17  
    18  package dubbo
    19  
    20  import (
    21  	"github.com/opentracing/opentracing-go"
    22  )
    23  
    24  import (
    25  	invocation_impl "dubbo.apache.org/dubbo-go/v3/protocol/invocation"
    26  )
    27  
    28  func injectTraceCtx(currentSpan opentracing.Span, inv *invocation_impl.RPCInvocation) error {
    29  	// inject opentracing ctx
    30  	traceAttachments := filterContext(inv.Attachments())
    31  	carrier := opentracing.TextMapCarrier(traceAttachments)
    32  	err := opentracing.GlobalTracer().Inject(currentSpan.Context(), opentracing.TextMap, carrier)
    33  	if err == nil {
    34  		fillTraceAttachments(inv.Attachments(), traceAttachments)
    35  	}
    36  	return err
    37  }
    38  
    39  func filterContext(attachments map[string]interface{}) map[string]string {
    40  	traceAttchment := make(map[string]string)
    41  	for k, v := range attachments {
    42  		if r, ok := v.(string); ok {
    43  			traceAttchment[k] = r
    44  		}
    45  	}
    46  	return traceAttchment
    47  }
    48  
    49  func fillTraceAttachments(attachments map[string]interface{}, traceAttachment map[string]string) {
    50  	for k, v := range traceAttachment {
    51  		attachments[k] = v
    52  	}
    53  }