dubbo/src/cluster/loadbalance/types.rs

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

use std::fmt::Debug;
use std::sync::Arc;

use crate::codegen::RpcInvocation;
use crate::common::url::Url;

pub type BoxLoadBalance = Box<dyn LoadBalance + Send + Sync>;

pub trait LoadBalance: Debug {
    fn select(
        &self,
        invokers: Arc<Vec<Url>>,
        url: Option<Url>,
        invocation: Arc<RpcInvocation>,
    ) -> Option<Url>;
}

pub struct Metadata {
    pub name: &'static str,
}

impl Metadata {
    pub fn new(name: &'static str) -> Self {
        Metadata { name }
    }
}