dubbo.apache.org/dubbo-go/v3@v3.1.1/xds/utils/wrr/wrr.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  /*
    19   *
    20   * Copyright 2019 gRPC authors.
    21   *
    22   */
    23  
    24  // Package wrr contains the interface and common implementations of wrr
    25  // algorithms.
    26  package wrr
    27  
    28  // WRR defines an interface that implements weighted round robin.
    29  type WRR interface {
    30  	// Add adds an item with weight to the WRR set.
    31  	//
    32  	// Add and Next need to be thread safe.
    33  	Add(item interface{}, weight int64)
    34  	// Next returns the next picked item.
    35  	//
    36  	// Add and Next need to be thread safe.
    37  	Next() interface{}
    38  }