From 35018bca9cc39648b8304bb5f9b7149ec6bfc6bc Mon Sep 17 00:00:00 2001
From: veteranchen <veteranchen@tencent.com>
Date: Mon, 31 Jul 2023 21:47:11 +0800
Subject: [PATCH] polaris load balancer:  added weighted round robin

--issue=968
---
 .../PolarisAbstractLoadBalancer.java          | 101 ------------------
 1 file changed, 101 deletions(-)
 delete mode 100644 spring-cloud-starter-tencent-polaris-discovery/src/main/java/com/tencent/cloud/polaris/loadbalancer/PolarisAbstractLoadBalancer.java

diff --git a/spring-cloud-starter-tencent-polaris-discovery/src/main/java/com/tencent/cloud/polaris/loadbalancer/PolarisAbstractLoadBalancer.java b/spring-cloud-starter-tencent-polaris-discovery/src/main/java/com/tencent/cloud/polaris/loadbalancer/PolarisAbstractLoadBalancer.java
deleted file mode 100644
index f3ad9060d..000000000
--- a/spring-cloud-starter-tencent-polaris-discovery/src/main/java/com/tencent/cloud/polaris/loadbalancer/PolarisAbstractLoadBalancer.java
+++ /dev/null
@@ -1,101 +0,0 @@
-/*
- * Tencent is pleased to support the open source community by making Spring Cloud Tencent available.
- *
- * Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
- *
- * Licensed under the BSD 3-Clause License (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * https://opensource.org/licenses/BSD-3-Clause
- *
- * 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.
- */
-
-package com.tencent.cloud.polaris.loadbalancer;
-
-import java.util.List;
-import java.util.stream.Collectors;
-
-import com.tencent.cloud.common.metadata.MetadataContext;
-import com.tencent.cloud.common.pojo.PolarisServiceInstance;
-import com.tencent.polaris.api.pojo.DefaultServiceInstances;
-import com.tencent.polaris.api.pojo.Instance;
-import com.tencent.polaris.api.pojo.ServiceInstances;
-import com.tencent.polaris.api.pojo.ServiceKey;
-import com.tencent.polaris.router.api.core.RouterAPI;
-import com.tencent.polaris.router.api.rpc.ProcessLoadBalanceRequest;
-import com.tencent.polaris.router.api.rpc.ProcessLoadBalanceResponse;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-import reactor.core.publisher.Mono;
-
-import org.springframework.beans.factory.ObjectProvider;
-import org.springframework.cloud.client.ServiceInstance;
-import org.springframework.cloud.client.loadbalancer.DefaultResponse;
-import org.springframework.cloud.client.loadbalancer.EmptyResponse;
-import org.springframework.cloud.client.loadbalancer.Request;
-import org.springframework.cloud.client.loadbalancer.Response;
-import org.springframework.cloud.loadbalancer.core.NoopServiceInstanceListSupplier;
-import org.springframework.cloud.loadbalancer.core.ReactorServiceInstanceLoadBalancer;
-import org.springframework.cloud.loadbalancer.core.ServiceInstanceListSupplier;
-
-/**
- * Abstract Loadbalancer of Polaris.
- *
- * @author <a href="mailto:veteranchen@tencent.com">veteranchen</a>
- */
-public abstract class PolarisAbstractLoadBalancer implements ReactorServiceInstanceLoadBalancer {
-
-	private static final Logger log = LoggerFactory.getLogger(PolarisAbstractLoadBalancer.class);
-
-	private final String serviceId;
-
-	private final RouterAPI routerAPI;
-
-	private ObjectProvider<ServiceInstanceListSupplier> supplierObjectProvider;
-
-	public PolarisAbstractLoadBalancer(String serviceId, ObjectProvider<ServiceInstanceListSupplier> supplierObjectProvider, RouterAPI routerAPI) {
-		this.serviceId = serviceId;
-		this.supplierObjectProvider = supplierObjectProvider;
-		this.routerAPI = routerAPI;
-	}
-
-	private static ServiceInstances convertToPolarisServiceInstances(List<ServiceInstance> serviceInstances) {
-		ServiceKey serviceKey = new ServiceKey(MetadataContext.LOCAL_NAMESPACE, serviceInstances.get(0).getServiceId());
-		List<Instance> polarisInstances = serviceInstances.stream()
-				.map(serviceInstance -> ((PolarisServiceInstance) serviceInstance).getPolarisInstance())
-				.collect(Collectors.toList());
-		return new DefaultServiceInstances(serviceKey, polarisInstances);
-	}
-
-	@Override
-	public Mono<Response<ServiceInstance>> choose(Request request) {
-		ServiceInstanceListSupplier supplier = supplierObjectProvider
-				.getIfAvailable(NoopServiceInstanceListSupplier::new);
-		return supplier.get(request).next().map(serviceInstances -> {
-			if (serviceInstances.isEmpty()) {
-				log.warn("No servers available for service: " + this.serviceId);
-				return new EmptyResponse();
-			}
-
-			ProcessLoadBalanceRequest req = new ProcessLoadBalanceRequest();
-			req.setDstInstances(convertToPolarisServiceInstances(serviceInstances));
-			req = setProcessLoadBalanceRequest(req);
-
-			try {
-				ProcessLoadBalanceResponse response = routerAPI.processLoadBalance(req);
-				return new DefaultResponse(new PolarisServiceInstance(response.getTargetInstance()));
-			}
-			catch (Exception e) {
-				log.warn("PolarisRoutingLoadbalancer error", e);
-				return new EmptyResponse();
-			}
-		});
-	}
-
-	protected abstract ProcessLoadBalanceRequest setProcessLoadBalanceRequest(ProcessLoadBalanceRequest req);
-}