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/*
* Copyright 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.store.host.impl;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.Sets;
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.packet.IpAddress;
import org.onlab.packet.MacAddress;
import org.onlab.packet.VlanId;
import org.onlab.util.KryoNamespace;
import org.onosproject.net.Annotations;
import org.onosproject.net.ConnectPoint;
import org.onosproject.net.DefaultAnnotations;
import org.onosproject.net.DefaultHost;
import org.onosproject.net.DeviceId;
import org.onosproject.net.Host;
import org.onosproject.net.HostId;
import org.onosproject.net.HostLocation;
import org.onosproject.net.host.HostDescription;
import org.onosproject.net.host.HostEvent;
import org.onosproject.net.host.HostStore;
import org.onosproject.net.host.HostStoreDelegate;
import org.onosproject.net.provider.ProviderId;
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.slf4j.Logger;
import java.util.Collection;
import java.util.HashSet;
import java.util.Map;
import java.util.Objects;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
import java.util.function.Predicate;
import java.util.stream.Collectors;
import static com.google.common.base.Preconditions.checkNotNull;
import static com.google.common.base.Preconditions.checkState;
import static org.onosproject.net.DefaultAnnotations.merge;
import static org.onosproject.net.host.HostEvent.Type.*;
import static org.slf4j.LoggerFactory.getLogger;
/**
* Manages the inventory of hosts using a {@code EventuallyConsistentMap}.
*/
@Component(immediate = true)
@Service
public class DistributedHostStore
extends AbstractStore<HostEvent, HostStoreDelegate>
implements HostStore {
private final Logger log = getLogger(getClass());
@Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
protected StorageService storageService;
private ConsistentMap<HostId, DefaultHost> host;
private Map<HostId, DefaultHost> hosts;
private final ConcurrentHashMap<HostId, DefaultHost> prevHosts =
new ConcurrentHashMap<>();
private MapEventListener<HostId, DefaultHost> hostLocationTracker =
new HostLocationTracker();
@Activate
public void activate() {
KryoNamespace.Builder hostSerializer = KryoNamespace.newBuilder()
.register(KryoNamespaces.API);
host = storageService.<HostId, DefaultHost>consistentMapBuilder()
.withName("onos-hosts")
.withRelaxedReadConsistency()
.withSerializer(Serializer.using(hostSerializer.build()))
.build();
hosts = host.asJavaMap();
host.addListener(hostLocationTracker);
log.info("Started");
}
@Deactivate
public void deactivate() {
host.removeListener(hostLocationTracker);
prevHosts.clear();
log.info("Stopped");
}
// TODO No longer need to return HostEvent
@Override
public HostEvent createOrUpdateHost(ProviderId providerId,
HostId hostId,
HostDescription hostDescription,
boolean replaceIPs) {
// TODO: We need a way to detect conflicting changes and abort update.
// (BOC) Compute might do this for us.
hosts.compute(hostId, (id, existingHost) -> {
HostLocation location = hostDescription.location();
final Set<IpAddress> addresses;
if (existingHost == null || replaceIPs) {
addresses = ImmutableSet.copyOf(hostDescription.ipAddress());
} else {
addresses = Sets.newHashSet(existingHost.ipAddresses());
addresses.addAll(hostDescription.ipAddress());
}
final Annotations annotations;
if (existingHost != null) {
annotations = merge((DefaultAnnotations) existingHost.annotations(),
hostDescription.annotations());
} else {
annotations = hostDescription.annotations();
}
return new DefaultHost(providerId,
hostId,
hostDescription.hwAddress(),
hostDescription.vlan(),
location,
addresses,
annotations);
});
return null;
}
// TODO No longer need to return HostEvent
@Override
public HostEvent removeHost(HostId hostId) {
hosts.remove(hostId);
return null;
}
// TODO No longer need to return HostEvent
@Override
public HostEvent removeIp(HostId hostId, IpAddress ipAddress) {
hosts.compute(hostId, (id, existingHost) -> {
if (existingHost != null) {
checkState(Objects.equals(hostId.mac(), existingHost.mac()),
"Existing and new MAC addresses differ.");
checkState(Objects.equals(hostId.vlanId(), existingHost.vlan()),
"Existing and new VLANs differ.");
Set<IpAddress> addresses = existingHost.ipAddresses();
if (addresses != null && addresses.contains(ipAddress)) {
addresses = new HashSet<>(existingHost.ipAddresses());
addresses.remove(ipAddress);
return new DefaultHost(existingHost.providerId(),
hostId,
existingHost.mac(),
existingHost.vlan(),
existingHost.location(),
ImmutableSet.copyOf(addresses),
existingHost.annotations());
} else {
return existingHost;
}
}
return null;
});
return null;
}
@Override
public int getHostCount() {
return hosts.size();
}
@Override
public Iterable<Host> getHosts() {
return ImmutableSet.copyOf(hosts.values());
}
@Override
public Host getHost(HostId hostId) {
return hosts.get(hostId);
}
@Override
public Set<Host> getHosts(VlanId vlanId) {
return filter(hosts.values(), host -> Objects.equals(host.vlan(), vlanId));
}
@Override
public Set<Host> getHosts(MacAddress mac) {
return filter(hosts.values(), host -> Objects.equals(host.mac(), mac));
}
@Override
public Set<Host> getHosts(IpAddress ip) {
return filter(hosts.values(), host -> host.ipAddresses().contains(ip));
}
@Override
public Set<Host> getConnectedHosts(ConnectPoint connectPoint) {
Set<Host> filtered = hosts.entrySet().stream()
.filter(entry -> entry.getValue().location().equals(connectPoint))
.map(Map.Entry::getValue)
.collect(Collectors.toSet());
return ImmutableSet.copyOf(filtered);
}
@Override
public Set<Host> getConnectedHosts(DeviceId deviceId) {
Set<Host> filtered = hosts.entrySet().stream()
.filter(entry -> entry.getValue().location().deviceId().equals(deviceId))
.map(Map.Entry::getValue)
.collect(Collectors.toSet());
return ImmutableSet.copyOf(filtered);
}
private Set<Host> filter(Collection<DefaultHost> collection, Predicate<DefaultHost> predicate) {
return collection.stream().filter(predicate).collect(Collectors.toSet());
}
private class HostLocationTracker implements MapEventListener<HostId, DefaultHost> {
@Override
public void event(MapEvent<HostId, DefaultHost> event) {
DefaultHost host = checkNotNull(event.value().value());
if (event.type() == MapEvent.Type.INSERT) {
Host prevHost = prevHosts.put(host.id(), host);
if (prevHost == null) {
notifyDelegate(new HostEvent(HOST_ADDED, host));
} else if (!Objects.equals(prevHost.location(), host.location())) {
notifyDelegate(new HostEvent(HOST_MOVED, host, prevHost));
} else if (!Objects.equals(prevHost, host)) {
notifyDelegate(new HostEvent(HOST_UPDATED, host, prevHost));
}
} else if (event.type() == MapEvent.Type.REMOVE) {
if (prevHosts.remove(host.id()) != null) {
notifyDelegate(new HostEvent(HOST_REMOVED, host));
}
}
}
}
}
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