| /* |
| * 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.filter; |
| |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| import org.apache.servicecomb.foundation.common.exceptions.ServiceCombException; |
| import org.apache.servicecomb.serviceregistry.RegistryUtils; |
| import org.apache.servicecomb.serviceregistry.api.registry.MicroserviceInstance; |
| import org.apache.servicecomb.serviceregistry.discovery.AbstractDiscoveryFilter; |
| import org.apache.servicecomb.serviceregistry.discovery.DiscoveryContext; |
| import org.apache.servicecomb.serviceregistry.discovery.DiscoveryTreeNode; |
| |
| import com.netflix.config.DynamicPropertyFactory; |
| |
| |
| public class ZoneAwareDiscoveryFilter extends AbstractDiscoveryFilter { |
| public static final String KEY_ZONE_AWARE_STEP = "_KEY_ZONE_AWARE_STEP"; |
| |
| private static final String GROUP_RegionAndAZMatch = "instancesRegionAndAZMatch"; |
| |
| private static final String GROUP_InstancesAZMatch = "instancesAZMatch"; |
| |
| private static final String GROUP_InstancesNoMatch = "instancesNoMatch"; |
| |
| public static final String GROUP_Instances_All = "instancesAll"; |
| |
| @Override |
| public int getOrder() { |
| return 300; |
| } |
| |
| @Override |
| public boolean enabled() { |
| return DynamicPropertyFactory.getInstance() |
| .getBooleanProperty("servicecomb.loadbalance.filter.zoneaware.enabled", true).get(); |
| } |
| |
| @Override |
| public boolean isGroupingFilter() { |
| return true; |
| } |
| |
| @Override |
| protected void init(DiscoveryContext context, DiscoveryTreeNode parent) { |
| MicroserviceInstance myself = RegistryUtils.getMicroserviceInstance(); |
| |
| Map<String, MicroserviceInstance> instancesRegionAndAZMatch = new HashMap<>(); |
| Map<String, MicroserviceInstance> instancesAZMatch = new HashMap<>(); |
| Map<String, MicroserviceInstance> instancesNoMatch = new HashMap<>(); |
| Map<String, MicroserviceInstance> instances = parent.data(); |
| instances.entrySet().forEach(stringMicroserviceInstanceEntry -> { |
| String id = stringMicroserviceInstanceEntry.getKey(); |
| MicroserviceInstance target = stringMicroserviceInstanceEntry.getValue(); |
| if (regionAndAZMatch(myself, target)) { |
| instancesRegionAndAZMatch.put(id, target); |
| } else if (regionMatch(myself, target)) { |
| instancesAZMatch.put(id, target); |
| } else { |
| instancesNoMatch.put(id, target); |
| } |
| }); |
| Map<String, DiscoveryTreeNode> children = new HashMap<>(); |
| children.put(GROUP_RegionAndAZMatch, new DiscoveryTreeNode() |
| .subName(parent, GROUP_RegionAndAZMatch) |
| .data(instancesRegionAndAZMatch)); |
| children.put(GROUP_InstancesAZMatch, new DiscoveryTreeNode() |
| .subName(parent, GROUP_InstancesAZMatch) |
| .data(instancesAZMatch)); |
| children.put(GROUP_InstancesNoMatch, new DiscoveryTreeNode() |
| .subName(parent, GROUP_InstancesNoMatch) |
| .data(instancesNoMatch)); |
| children.put(GROUP_Instances_All, new DiscoveryTreeNode() |
| .subName(parent, GROUP_Instances_All) |
| .data(instances)); |
| parent.children(children); |
| } |
| |
| @Override |
| protected String findChildName(DiscoveryContext context, DiscoveryTreeNode parent) { |
| String key = context.getContextParameter(KEY_ZONE_AWARE_STEP); |
| if (key == null) { |
| key = GROUP_RegionAndAZMatch; |
| context.pushRerunFilter(); |
| } else if (GROUP_RegionAndAZMatch.equals(key)) { |
| key = GROUP_InstancesAZMatch; |
| context.pushRerunFilter(); |
| } else if (GROUP_InstancesAZMatch.equals(key)) { |
| key = GROUP_InstancesNoMatch; |
| context.pushRerunFilter(); |
| } else if (GROUP_InstancesNoMatch.equals(key)) { |
| key = GROUP_Instances_All; |
| } else { |
| throw new ServiceCombException("not possible happen, maybe a bug."); |
| } |
| context.putContextParameter(KEY_ZONE_AWARE_STEP, key); |
| return key; |
| } |
| |
| private boolean regionAndAZMatch(MicroserviceInstance myself, MicroserviceInstance target) { |
| if (myself.getDataCenterInfo() == null) { |
| // when instance have no datacenter info, it will match all other datacenters |
| return true; |
| } |
| if (target.getDataCenterInfo() != null) { |
| return myself.getDataCenterInfo().getRegion().equals(target.getDataCenterInfo().getRegion()) && |
| myself.getDataCenterInfo().getAvailableZone().equals(target.getDataCenterInfo().getAvailableZone()); |
| } |
| return false; |
| } |
| |
| private boolean regionMatch(MicroserviceInstance myself, MicroserviceInstance target) { |
| if (target.getDataCenterInfo() != null) { |
| return myself.getDataCenterInfo().getRegion().equals(target.getDataCenterInfo().getRegion()); |
| } |
| return false; |
| } |
| } |