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/*
* Copyright 2014-2015 Open Networking Laboratory
*
* 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.onosproject.cordvtn;
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.onosproject.cluster.ClusterService;
import org.onosproject.cluster.LeadershipEvent;
import org.onosproject.cluster.LeadershipEventListener;
import org.onosproject.cluster.LeadershipService;
import org.onosproject.cluster.NodeId;
import org.onosproject.core.ApplicationId;
import org.onosproject.core.CoreService;
import org.onosproject.net.config.ConfigFactory;
import org.onosproject.net.config.NetworkConfigEvent;
import org.onosproject.net.config.NetworkConfigListener;
import org.onosproject.net.config.NetworkConfigRegistry;
import org.onosproject.net.config.NetworkConfigService;
import org.onosproject.net.config.basics.SubjectFactories;
import org.slf4j.Logger;
import static org.onosproject.cordvtn.OvsdbNode.State.INIT;
import static org.slf4j.LoggerFactory.getLogger;
/**
* Reads node information from the network config file and handles the config
* update events.
* Only a leader controller performs the node addition or deletion.
*/
@Component(immediate = true)
public class CordVtnConfigManager {
protected final Logger log = getLogger(getClass());
@Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
protected CoreService coreService;
@Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
protected NetworkConfigRegistry configRegistry;
@Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
protected NetworkConfigService configService;
@Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
protected LeadershipService leadershipService;
@Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
protected ClusterService clusterService;
@Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
protected CordVtnService cordVtnService;
private final ConfigFactory configFactory =
new ConfigFactory(SubjectFactories.APP_SUBJECT_FACTORY, CordVtnConfig.class, "cordvtn") {
@Override
public CordVtnConfig createConfig() {
return new CordVtnConfig();
}
};
private final LeadershipEventListener leadershipListener = new InternalLeadershipListener();
private final NetworkConfigListener configListener = new InternalConfigListener();
private NodeId local;
private ApplicationId appId;
@Activate
protected void active() {
local = clusterService.getLocalNode().id();
appId = coreService.getAppId(CordVtnService.CORDVTN_APP_ID);
configService.addListener(configListener);
configRegistry.registerConfigFactory(configFactory);
leadershipService.addListener(leadershipListener);
leadershipService.runForLeadership(CordVtnService.CORDVTN_APP_ID);
}
@Deactivate
protected void deactivate() {
leadershipService.removeListener(leadershipListener);
leadershipService.withdraw(appId.name());
configRegistry.unregisterConfigFactory(configFactory);
configService.removeListener(configListener);
}
private void readConfiguration() {
CordVtnConfig config = configRegistry.getConfig(appId, CordVtnConfig.class);
if (config == null) {
log.warn("No configuration found");
return;
}
config.ovsdbNodes().forEach(node -> {
DefaultOvsdbNode ovsdbNode =
new DefaultOvsdbNode(node.host(), node.ip(), node.port(), INIT);
cordVtnService.addNode(ovsdbNode);
log.info("Add new node {}", node.host());
});
}
private synchronized void processLeadershipChange(NodeId leader) {
if (leader == null || !leader.equals(local)) {
return;
}
readConfiguration();
}
private class InternalLeadershipListener implements LeadershipEventListener {
@Override
public void event(LeadershipEvent event) {
if (event.subject().topic().equals(appId.name())) {
processLeadershipChange(event.subject().leader());
}
}
}
private class InternalConfigListener implements NetworkConfigListener {
@Override
public void event(NetworkConfigEvent event) {
// TODO handle update event
}
}
}
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