Jian Li | daa7d6a | 2021-04-13 17:22:56 +0900 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2021-present Open Networking Foundation |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | package org.onosproject.kubevirtnetworking.impl; |
| 17 | |
| 18 | import com.google.common.base.Strings; |
| 19 | import com.google.common.collect.ImmutableSet; |
| 20 | import org.onosproject.core.ApplicationId; |
| 21 | import org.onosproject.core.CoreService; |
| 22 | import org.onosproject.event.ListenerRegistry; |
| 23 | import org.onosproject.kubevirtnetworking.api.KubevirtLoadBalancer; |
| 24 | import org.onosproject.kubevirtnetworking.api.KubevirtLoadBalancerAdminService; |
| 25 | import org.onosproject.kubevirtnetworking.api.KubevirtLoadBalancerEvent; |
| 26 | import org.onosproject.kubevirtnetworking.api.KubevirtLoadBalancerListener; |
| 27 | import org.onosproject.kubevirtnetworking.api.KubevirtLoadBalancerService; |
| 28 | import org.onosproject.kubevirtnetworking.api.KubevirtLoadBalancerStore; |
| 29 | import org.onosproject.kubevirtnetworking.api.KubevirtLoadBalancerStoreDelegate; |
| 30 | import org.osgi.service.component.annotations.Activate; |
| 31 | import org.osgi.service.component.annotations.Component; |
| 32 | import org.osgi.service.component.annotations.Deactivate; |
| 33 | import org.osgi.service.component.annotations.Reference; |
| 34 | import org.osgi.service.component.annotations.ReferenceCardinality; |
| 35 | import org.slf4j.Logger; |
| 36 | |
| 37 | import java.util.Set; |
| 38 | |
| 39 | import static com.google.common.base.Preconditions.checkArgument; |
| 40 | import static com.google.common.base.Preconditions.checkNotNull; |
| 41 | import static org.onosproject.kubevirtnetworking.api.Constants.KUBEVIRT_NETWORKING_APP_ID; |
| 42 | import static org.slf4j.LoggerFactory.getLogger; |
| 43 | |
| 44 | /** |
| 45 | * Provides implementation of administering and interfacing kubevirt load balancer. |
| 46 | */ |
| 47 | @Component( |
| 48 | immediate = true, |
| 49 | service = {KubevirtLoadBalancerAdminService.class, KubevirtLoadBalancerService.class} |
| 50 | ) |
| 51 | public class KubevirtLoadBalancerManager |
| 52 | extends ListenerRegistry<KubevirtLoadBalancerEvent, KubevirtLoadBalancerListener> |
| 53 | implements KubevirtLoadBalancerAdminService, KubevirtLoadBalancerService { |
| 54 | |
| 55 | protected final Logger log = getLogger(getClass()); |
| 56 | |
| 57 | private static final String MSG_LOAD_BALANCER = "Kubevirt load balancer %s %s"; |
| 58 | private static final String MSG_CREATED = "created"; |
| 59 | private static final String MSG_UPDATED = "updated"; |
| 60 | private static final String MSG_REMOVED = "removed"; |
| 61 | |
| 62 | private static final String ERR_NULL_LOAD_BALANCER = "Kubevirt load balancer cannot be null"; |
| 63 | private static final String ERR_NULL_LOAD_BALANCER_NAME = "Kubevirt load balancer name cannot be null"; |
| 64 | private static final String ERR_IN_USE = " still in use"; |
| 65 | |
| 66 | @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| 67 | protected CoreService coreService; |
| 68 | |
| 69 | @Reference(cardinality = ReferenceCardinality.MANDATORY) |
| 70 | protected KubevirtLoadBalancerStore kubevirtLoadBalancerStore; |
| 71 | |
| 72 | private final InternalKubevirtLoadBalancerStorageDelegate delegate = |
| 73 | new InternalKubevirtLoadBalancerStorageDelegate(); |
| 74 | |
| 75 | private ApplicationId appId; |
| 76 | |
| 77 | @Activate |
| 78 | protected void activate() { |
| 79 | appId = coreService.registerApplication(KUBEVIRT_NETWORKING_APP_ID); |
| 80 | |
| 81 | kubevirtLoadBalancerStore.setDelegate(delegate); |
| 82 | log.info("Started"); |
| 83 | } |
| 84 | |
| 85 | @Deactivate |
| 86 | protected void deactivate() { |
| 87 | kubevirtLoadBalancerStore.unsetDelegate(delegate); |
| 88 | log.info("Stopped"); |
| 89 | } |
| 90 | |
| 91 | @Override |
| 92 | public void createLoadBalancer(KubevirtLoadBalancer lb) { |
| 93 | checkNotNull(lb, ERR_NULL_LOAD_BALANCER); |
| 94 | checkArgument(!Strings.isNullOrEmpty(lb.name()), ERR_NULL_LOAD_BALANCER_NAME); |
| 95 | |
| 96 | kubevirtLoadBalancerStore.createLoadBalancer(lb); |
| 97 | log.info(String.format(MSG_LOAD_BALANCER, lb.name(), MSG_CREATED)); |
| 98 | } |
| 99 | |
| 100 | @Override |
| 101 | public void updateLoadBalancer(KubevirtLoadBalancer lb) { |
| 102 | checkNotNull(lb, ERR_NULL_LOAD_BALANCER); |
| 103 | checkArgument(!Strings.isNullOrEmpty(lb.name()), ERR_NULL_LOAD_BALANCER_NAME); |
| 104 | |
| 105 | kubevirtLoadBalancerStore.updateLoadBalancer(lb); |
| 106 | log.info(String.format(MSG_LOAD_BALANCER, lb.name(), MSG_UPDATED)); |
| 107 | } |
| 108 | |
| 109 | @Override |
| 110 | public void removeLoadBalancer(String name) { |
| 111 | checkArgument(name != null, ERR_NULL_LOAD_BALANCER_NAME); |
| 112 | synchronized (this) { |
| 113 | if (isLoadBalancerInUse(name)) { |
| 114 | final String error = String.format(MSG_LOAD_BALANCER, name, ERR_IN_USE); |
| 115 | throw new IllegalStateException(error); |
| 116 | } |
| 117 | } |
| 118 | |
| 119 | KubevirtLoadBalancer lb = kubevirtLoadBalancerStore.removeLoadBalancer(name); |
| 120 | if (lb != null) { |
| 121 | log.info(String.format(MSG_LOAD_BALANCER, lb.name(), MSG_REMOVED)); |
| 122 | } |
| 123 | } |
| 124 | |
| 125 | @Override |
| 126 | public void clear() { |
| 127 | kubevirtLoadBalancerStore.clear(); |
| 128 | } |
| 129 | |
| 130 | @Override |
| 131 | public KubevirtLoadBalancer loadBalancer(String name) { |
| 132 | checkArgument(name != null, ERR_NULL_LOAD_BALANCER_NAME); |
| 133 | return kubevirtLoadBalancerStore.loadBalancer(name); |
| 134 | } |
| 135 | |
| 136 | @Override |
| 137 | public Set<KubevirtLoadBalancer> loadBalancers() { |
| 138 | return ImmutableSet.copyOf(kubevirtLoadBalancerStore.loadBalancers()); |
| 139 | } |
| 140 | |
| 141 | private boolean isLoadBalancerInUse(String name) { |
| 142 | return false; |
| 143 | } |
| 144 | |
| 145 | private class InternalKubevirtLoadBalancerStorageDelegate |
| 146 | implements KubevirtLoadBalancerStoreDelegate { |
| 147 | |
| 148 | @Override |
| 149 | public void notify(KubevirtLoadBalancerEvent event) { |
| 150 | log.trace("send kubevirt load balancer event {}", event); |
| 151 | process(event); |
| 152 | } |
| 153 | } |
| 154 | } |