| /* |
| * 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.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.Service; |
| import org.onosproject.net.ConnectPoint; |
| import org.onosproject.net.PortNumber; |
| import org.onosproject.net.flow.FlowEntry; |
| import org.onosproject.net.flow.FlowRule; |
| import org.onosproject.net.flow.instructions.Instruction; |
| import org.onosproject.net.flow.instructions.Instructions; |
| import org.onosproject.net.statistic.StatisticStore; |
| import org.slf4j.Logger; |
| |
| import java.util.Collections; |
| import java.util.HashSet; |
| import java.util.Map; |
| import java.util.Set; |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.util.concurrent.atomic.AtomicInteger; |
| |
| import static org.slf4j.LoggerFactory.getLogger; |
| |
| |
| /** |
| * Maintains statistics using RPC calls to collect stats from remote instances |
| * on demand. |
| */ |
| @Component(immediate = true) |
| @Service |
| public class SimpleStatisticStore implements StatisticStore { |
| |
| private final Logger log = getLogger(getClass()); |
| |
| private Map<ConnectPoint, InternalStatisticRepresentation> |
| representations = new ConcurrentHashMap<>(); |
| |
| private Map<ConnectPoint, Set<FlowEntry>> previous = new ConcurrentHashMap<>(); |
| private Map<ConnectPoint, Set<FlowEntry>> current = new ConcurrentHashMap<>(); |
| |
| @Activate |
| public void activate() { |
| log.info("Started"); |
| } |
| |
| @Deactivate |
| public void deactivate() { |
| log.info("Stopped"); |
| } |
| |
| @Override |
| public void prepareForStatistics(FlowRule rule) { |
| ConnectPoint cp = buildConnectPoint(rule); |
| if (cp == null) { |
| return; |
| } |
| InternalStatisticRepresentation rep; |
| synchronized (representations) { |
| rep = getOrCreateRepresentation(cp); |
| } |
| rep.prepare(); |
| } |
| |
| @Override |
| public synchronized void removeFromStatistics(FlowRule rule) { |
| ConnectPoint cp = buildConnectPoint(rule); |
| if (cp == null) { |
| return; |
| } |
| InternalStatisticRepresentation rep = representations.get(cp); |
| if (rep != null && rep.remove(rule)) { |
| updatePublishedStats(cp, Collections.emptySet()); |
| } |
| Set<FlowEntry> values = current.get(cp); |
| if (values != null) { |
| values.remove(rule); |
| } |
| values = previous.get(cp); |
| if (values != null) { |
| values.remove(rule); |
| } |
| |
| } |
| |
| @Override |
| public void addOrUpdateStatistic(FlowEntry rule) { |
| ConnectPoint cp = buildConnectPoint(rule); |
| if (cp == null) { |
| return; |
| } |
| InternalStatisticRepresentation rep = representations.get(cp); |
| if (rep != null && rep.submit(rule)) { |
| updatePublishedStats(cp, rep.get()); |
| } |
| } |
| |
| private synchronized void updatePublishedStats(ConnectPoint cp, |
| Set<FlowEntry> flowEntries) { |
| Set<FlowEntry> curr = current.get(cp); |
| if (curr == null) { |
| curr = new HashSet<>(); |
| } |
| previous.put(cp, curr); |
| current.put(cp, flowEntries); |
| |
| } |
| |
| @Override |
| public Set<FlowEntry> getCurrentStatistic(ConnectPoint connectPoint) { |
| return getCurrentStatisticInternal(connectPoint); |
| } |
| |
| private synchronized Set<FlowEntry> getCurrentStatisticInternal(ConnectPoint connectPoint) { |
| return current.get(connectPoint); |
| } |
| |
| @Override |
| public Set<FlowEntry> getPreviousStatistic(ConnectPoint connectPoint) { |
| return getPreviousStatisticInternal(connectPoint); |
| } |
| |
| private synchronized Set<FlowEntry> getPreviousStatisticInternal(ConnectPoint connectPoint) { |
| return previous.get(connectPoint); |
| } |
| |
| private InternalStatisticRepresentation getOrCreateRepresentation(ConnectPoint cp) { |
| |
| if (representations.containsKey(cp)) { |
| return representations.get(cp); |
| } else { |
| InternalStatisticRepresentation rep = new InternalStatisticRepresentation(); |
| representations.put(cp, rep); |
| return rep; |
| } |
| |
| } |
| |
| private ConnectPoint buildConnectPoint(FlowRule rule) { |
| PortNumber port = getOutput(rule); |
| |
| if (port == null) { |
| return null; |
| } |
| ConnectPoint cp = new ConnectPoint(rule.deviceId(), port); |
| return cp; |
| } |
| |
| private PortNumber getOutput(FlowRule rule) { |
| for (Instruction i : rule.treatment().immediate()) { |
| if (i.type() == Instruction.Type.OUTPUT) { |
| Instructions.OutputInstruction out = (Instructions.OutputInstruction) i; |
| return out.port(); |
| } |
| if (i.type() == Instruction.Type.DROP) { |
| return PortNumber.P0; |
| } |
| } |
| return null; |
| } |
| |
| private class InternalStatisticRepresentation { |
| |
| private final AtomicInteger counter = new AtomicInteger(0); |
| private final Set<FlowEntry> rules = new HashSet<>(); |
| |
| public void prepare() { |
| counter.incrementAndGet(); |
| } |
| |
| public synchronized boolean remove(FlowRule rule) { |
| rules.remove(rule); |
| return counter.decrementAndGet() == 0; |
| } |
| |
| public synchronized boolean submit(FlowEntry rule) { |
| if (rules.contains(rule)) { |
| rules.remove(rule); |
| } |
| rules.add(rule); |
| if (counter.get() == 0) { |
| return true; |
| } else { |
| return counter.decrementAndGet() == 0; |
| } |
| } |
| |
| public synchronized Set<FlowEntry> get() { |
| counter.set(rules.size()); |
| return Sets.newHashSet(rules); |
| } |
| |
| } |
| |
| } |