| /* |
| * Copyright 2017-present Open Networking Foundation |
| * |
| * Licensed 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.opencord.cordvtn.impl; |
| |
| import com.google.common.collect.ImmutableSet; |
| import org.apache.felix.scr.annotations.Activate; |
| import org.apache.felix.scr.annotations.Component; |
| import org.apache.felix.scr.annotations.Deactivate; |
| import org.apache.felix.scr.annotations.Reference; |
| import org.apache.felix.scr.annotations.ReferenceCardinality; |
| import org.apache.felix.scr.annotations.Service; |
| import org.onlab.util.KryoNamespace; |
| import org.onosproject.core.ApplicationId; |
| import org.onosproject.core.CoreService; |
| import org.onosproject.store.AbstractStore; |
| import org.onosproject.store.serializers.KryoNamespaces; |
| import org.onosproject.store.service.ConsistentMap; |
| import org.onosproject.store.service.MapEvent; |
| import org.onosproject.store.service.MapEventListener; |
| import org.onosproject.store.service.Serializer; |
| import org.onosproject.store.service.StorageService; |
| import org.onosproject.store.service.Versioned; |
| import org.opencord.cordvtn.api.net.CidrAddr; |
| import org.opencord.cordvtn.api.node.CordVtnNode; |
| import org.opencord.cordvtn.api.node.CordVtnNodeEvent; |
| import org.opencord.cordvtn.api.node.CordVtnNodeHandler; |
| import org.opencord.cordvtn.api.node.CordVtnNodeState; |
| import org.opencord.cordvtn.api.node.CordVtnNodeStore; |
| import org.opencord.cordvtn.api.node.CordVtnNodeStoreDelegate; |
| import org.opencord.cordvtn.api.node.SshAccessInfo; |
| import org.slf4j.Logger; |
| |
| import java.util.Set; |
| import java.util.concurrent.ExecutorService; |
| import java.util.stream.Collectors; |
| |
| import static com.google.common.base.Preconditions.checkArgument; |
| import static java.util.concurrent.Executors.newSingleThreadExecutor; |
| import static org.onlab.util.Tools.groupedThreads; |
| import static org.opencord.cordvtn.api.Constants.CORDVTN_APP_ID; |
| import static org.opencord.cordvtn.api.node.CordVtnNodeState.COMPLETE; |
| import static org.slf4j.LoggerFactory.getLogger; |
| |
| /** |
| * Manages the inventory of cordvtn nodes using a {@link ConsistentMap}. |
| */ |
| @Component(immediate = true) |
| @Service |
| public class DistributedCordVtnNodeStore extends AbstractStore<CordVtnNodeEvent, CordVtnNodeStoreDelegate> |
| implements CordVtnNodeStore { |
| |
| protected final Logger log = getLogger(getClass()); |
| |
| private static final String ERR_NOT_FOUND = " does not exist"; |
| private static final String ERR_DUPLICATE = " already exists"; |
| |
| private static final KryoNamespace SERIALIZER_CORDVTN_NODE = KryoNamespace.newBuilder() |
| .register(KryoNamespaces.API) |
| .register(CordVtnNode.class) |
| .register(DefaultCordVtnNode.class) |
| .register(CidrAddr.class) |
| .register(SshAccessInfo.class) |
| .register(CordVtnNodeState.class) |
| .register(CordVtnNodeHandler.class) |
| .register(DefaultCordVtnNodeHandler.class) |
| .build(); |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected CoreService coreService; |
| |
| @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY) |
| protected StorageService storageService; |
| |
| private final ExecutorService eventExecutor = newSingleThreadExecutor( |
| groupedThreads(this.getClass().getSimpleName(), "event-handler", log)); |
| private final MapEventListener<String, CordVtnNode> nodeStoreListener = new InternalMapListener(); |
| private ConsistentMap<String, CordVtnNode> nodeStore; |
| |
| @Activate |
| protected void activate() { |
| ApplicationId appId = coreService.registerApplication(CORDVTN_APP_ID); |
| nodeStore = storageService.<String, CordVtnNode>consistentMapBuilder() |
| .withSerializer(Serializer.using(SERIALIZER_CORDVTN_NODE)) |
| .withName("cordvtn-nodestore") |
| .withApplicationId(appId) |
| .build(); |
| nodeStore.addListener(nodeStoreListener); |
| log.info("Started"); |
| } |
| |
| @Deactivate |
| protected void deactivate() { |
| nodeStore.removeListener(nodeStoreListener); |
| log.info("Stopped"); |
| } |
| |
| @Override |
| public Set<CordVtnNode> nodes() { |
| Set<CordVtnNode> nodes = nodeStore.values().stream() |
| .map(Versioned::value) |
| .collect(Collectors.toSet()); |
| return ImmutableSet.copyOf(nodes); |
| } |
| |
| @Override |
| public CordVtnNode node(String hostname) { |
| Versioned<CordVtnNode> versioned = nodeStore.get(hostname); |
| return versioned == null ? null : versioned.value(); |
| } |
| |
| @Override |
| public void createNode(CordVtnNode node) { |
| nodeStore.compute(node.hostname(), (hostname, existing) -> { |
| final String error = node.hostname() + ERR_DUPLICATE; |
| checkArgument(existing == null, error); |
| return node; |
| }); |
| } |
| |
| @Override |
| public void updateNode(CordVtnNode node) { |
| nodeStore.compute(node.hostname(), (hostname, existing) -> { |
| final String error = node.hostname() + ERR_NOT_FOUND; |
| checkArgument(existing != null, error); |
| return node; |
| }); |
| } |
| |
| @Override |
| public CordVtnNode removeNode(String hostname) { |
| Versioned<CordVtnNode> removed = nodeStore.remove(hostname); |
| return removed == null ? null : removed.value(); |
| } |
| |
| private class InternalMapListener implements MapEventListener<String, CordVtnNode> { |
| |
| @Override |
| public void event(MapEvent<String, CordVtnNode> event) { |
| switch (event.type()) { |
| case INSERT: |
| log.debug("CordVtn node is created {}", event.newValue().value()); |
| eventExecutor.execute(() -> { |
| notifyDelegate(new CordVtnNodeEvent( |
| CordVtnNodeEvent.Type.NODE_CREATED, |
| event.newValue().value() |
| )); |
| if (event.newValue().value().state() == COMPLETE) { |
| notifyDelegate(new CordVtnNodeEvent( |
| CordVtnNodeEvent.Type.NODE_COMPLETE, |
| event.newValue().value() |
| )); |
| } |
| }); |
| break; |
| case UPDATE: |
| log.debug("CordVtn node is updated {}", event.newValue().value()); |
| eventExecutor.execute(() -> { |
| notifyDelegate(new CordVtnNodeEvent( |
| CordVtnNodeEvent.Type.NODE_UPDATED, |
| event.newValue().value() |
| )); |
| processUpdated(event.oldValue().value(), event.newValue().value()); |
| }); |
| break; |
| case REMOVE: |
| log.debug("CordVtn node is removed {}", event.oldValue().value()); |
| eventExecutor.execute(() -> { |
| notifyDelegate(new CordVtnNodeEvent( |
| CordVtnNodeEvent.Type.NODE_REMOVED, |
| event.oldValue().value() |
| )); |
| }); |
| break; |
| default: |
| // do nothing |
| break; |
| } |
| } |
| |
| private void processUpdated(CordVtnNode oldNode, CordVtnNode newNode) { |
| if (oldNode.state() != COMPLETE && newNode.state() == COMPLETE) { |
| notifyDelegate(new CordVtnNodeEvent( |
| CordVtnNodeEvent.Type.NODE_COMPLETE, |
| newNode |
| )); |
| } else if (oldNode.state() == COMPLETE && newNode.state() != COMPLETE) { |
| notifyDelegate(new CordVtnNodeEvent( |
| CordVtnNodeEvent.Type.NODE_INCOMPLETE, |
| newNode |
| )); |
| } |
| } |
| } |
| } |