github.com/cloudwego/kitex@v0.9.0/pkg/remote/profiler_meta.go (about)

     1  /*
     2   * Copyright 2022 CloudWeGo Authors
     3   *
     4   * Licensed under the Apache License, Version 2.0 (the "License");
     5   * you may not use this file except in compliance with the License.
     6   * You may obtain a copy of the License at
     7   *
     8   *     http://www.apache.org/licenses/LICENSE-2.0
     9   *
    10   * Unless required by applicable law or agreed to in writing, software
    11   * distributed under the License is distributed on an "AS IS" BASIS,
    12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13   * See the License for the specific language governing permissions and
    14   * limitations under the License.
    15   */
    16  
    17  package remote
    18  
    19  import (
    20  	"context"
    21  
    22  	"github.com/cloudwego/kitex/pkg/profiler"
    23  )
    24  
    25  type (
    26  	// TransInfoTagging extracting tags after TransInfo decoded but before message decoded.
    27  	TransInfoTagging func(ctx context.Context, msg Message) (context.Context, []string)
    28  	// MessageTagging extracting tags after whole decode process finished.
    29  	MessageTagging func(ctx context.Context, msg Message) (context.Context, []string)
    30  )
    31  
    32  var _ MetaHandler = (*profilerMetaHandler)(nil)
    33  
    34  // NewProfilerMetaHandler creates profiler MetaHandler
    35  func NewProfilerMetaHandler(pr profiler.Profiler, tagging MessageTagging) MetaHandler {
    36  	return &profilerMetaHandler{
    37  		profiler: pr,
    38  		tagging:  tagging,
    39  	}
    40  }
    41  
    42  type profilerMetaHandler struct {
    43  	profiler profiler.Profiler
    44  	tagging  MessageTagging
    45  }
    46  
    47  func (p *profilerMetaHandler) WriteMeta(ctx context.Context, msg Message) (context.Context, error) {
    48  	return ctx, nil
    49  }
    50  
    51  func (p *profilerMetaHandler) ReadMeta(ctx context.Context, msg Message) (context.Context, error) {
    52  	ctx, tags := p.tagging(ctx, msg)
    53  	return p.profiler.Tag(ctx, tags...), nil
    54  }