github.com/cloudwego/kitex@v0.9.0/pkg/streaming/context.go (about)

     1  /*
     2   * Copyright 2023 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 streaming
    18  
    19  import "context"
    20  
    21  type streamKey struct{}
    22  
    23  func NewCtxWithStream(ctx context.Context, stream Stream) context.Context {
    24  	return context.WithValue(ctx, streamKey{}, stream)
    25  }
    26  
    27  func GetStream(ctx context.Context) Stream {
    28  	if s, ok := ctx.Value(streamKey{}).(Stream); ok {
    29  		return s
    30  	}
    31  	return nil
    32  }