github.com/hxx258456/ccgo@v0.0.5-0.20230213014102-48b35f46f66f/grpc/internal/wrr/wrr.go (about)

     1  /*
     2   *
     3   * Copyright 2019 gRPC authors.
     4   *
     5   * Licensed under the Apache License, Version 2.0 (the "License");
     6   * you may not use this file except in compliance with the License.
     7   * 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 wrr contains the interface and common implementations of wrr
    19  // algorithms.
    20  package wrr
    21  
    22  // WRR defines an interface that implements weighted round robin.
    23  type WRR interface {
    24  	// Add adds an item with weight to the WRR set.
    25  	//
    26  	// Add and Next need to be thread safe.
    27  	Add(item interface{}, weight int64)
    28  	// Next returns the next picked item.
    29  	//
    30  	// Add and Next need to be thread safe.
    31  	Next() interface{}
    32  }