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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.store.trivial;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.Lists;
import com.google.common.collect.Maps;
import com.google.common.collect.Sets;
import org.apache.felix.scr.annotations.Component;
import org.apache.felix.scr.annotations.Service;
import org.onosproject.net.flow.TrafficSelector;
import org.onosproject.net.packet.OutboundPacket;
import org.onosproject.net.packet.PacketEvent;
import org.onosproject.net.packet.PacketEvent.Type;
import org.onosproject.net.packet.PacketRequest;
import org.onosproject.net.packet.PacketStore;
import org.onosproject.net.packet.PacketStoreDelegate;
import org.onosproject.store.AbstractStore;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
/**
* Simple single instance implementation of the packet store.
*/
@Component(immediate = true)
@Service
public class SimplePacketStore
extends AbstractStore<PacketEvent, PacketStoreDelegate>
implements PacketStore {
private Map<TrafficSelector, Set<PacketRequest>> requests = Maps.newConcurrentMap();
@Override
public void emit(OutboundPacket packet) {
notifyDelegate(new PacketEvent(Type.EMIT, packet));
}
@Override
public void requestPackets(PacketRequest request) {
requests.compute(request.selector(), (s, existingRequests) -> {
if (existingRequests == null) {
return ImmutableSet.of(request);
} else if (!existingRequests.contains(request)) {
if (delegate != null) {
delegate.requestPackets(request);
}
return ImmutableSet.<PacketRequest>builder()
.addAll(existingRequests)
.add(request)
.build();
} else {
return existingRequests;
}
});
}
@Override
public void cancelPackets(PacketRequest request) {
requests.computeIfPresent(request.selector(), (s, existingRequests) -> {
if (existingRequests.contains(request)) {
HashSet<PacketRequest> newRequests = Sets.newHashSet(existingRequests);
newRequests.remove(request);
if (newRequests.size() > 0) {
return ImmutableSet.copyOf(newRequests);
} else {
if (delegate != null) {
delegate.cancelPackets(request);
}
return null;
}
} else {
return existingRequests;
}
});
}
@Override
public List<PacketRequest> existingRequests() {
List<PacketRequest> list = Lists.newArrayList();
requests.values().forEach(list::addAll);
list.sort((o1, o2) -> o1.priority().priorityValue() - o2.priority().priorityValue());
return list;
}
}
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