| /* |
| * 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. |
| */ |
| |
| package org.apache.servicecomb.loadbalance; |
| |
| import java.util.List; |
| |
| import org.apache.servicecomb.core.Invocation; |
| |
| /** |
| * Base interface for server list filters. |
| * |
| * Robin ServerListFilter can not support invocation based filter strategies, so we create a new one to |
| * support this. |
| */ |
| public interface ServerListFilterExt { |
| int ORDER_NORMAL = 0; |
| |
| int ORDER_ISOLATION = -100; |
| |
| int ORDER_ZONE_AWARE = 200; |
| |
| String EMPTY_INSTANCE_PROTECTION = "servicecomb.loadbalance.filter.isolation.emptyInstanceProtectionEnabled"; |
| |
| String ISOLATION_FILTER_ENABLED = "servicecomb.loadbalance.filter.isolation.enabled"; |
| |
| String ZONE_AWARE_FILTER_ENABLED = "servicecomb.loadbalance.filter.zoneaware.enabled"; |
| |
| default int getOrder() { |
| return ORDER_NORMAL; |
| } |
| |
| default boolean enabled() { |
| return true; |
| } |
| |
| default void setLoadBalancer(LoadBalancer loadBalancer) { |
| } |
| |
| List<ServiceCombServer> getFilteredListOfServers(List<ServiceCombServer> servers, Invocation invocation); |
| } |