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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.trivial;
import com.google.common.collect.Lists;
import com.google.common.collect.Maps;
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.intent.Intent;
import org.onosproject.net.intent.IntentData;
import org.onosproject.net.intent.IntentEvent;
import org.onosproject.net.intent.IntentState;
import org.onosproject.net.intent.IntentStore;
import org.onosproject.net.intent.IntentStoreDelegate;
import org.onosproject.net.intent.Key;
import org.onosproject.store.AbstractStore;
import org.slf4j.Logger;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;
import static com.google.common.base.Preconditions.checkNotNull;
import static org.onosproject.net.intent.IntentState.PURGE_REQ;
import static org.slf4j.LoggerFactory.getLogger;
/**
* Simple single-instance implementation of the intent store.
*/
@Component(immediate = true)
@Service
public class SimpleIntentStore
extends AbstractStore<IntentEvent, IntentStoreDelegate>
implements IntentStore {
private final Logger log = getLogger(getClass());
private final Map<Key, IntentData> current = Maps.newConcurrentMap();
private final Map<Key, IntentData> pending = Maps.newConcurrentMap();
@Activate
public void activate() {
log.info("Started");
}
@Deactivate
public void deactivate() {
log.info("Stopped");
}
@Override
public long getIntentCount() {
return current.size();
}
@Override
public Iterable<Intent> getIntents() {
return current.values().stream()
.map(IntentData::intent)
.collect(Collectors.toList());
}
@Override
public Iterable<IntentData> getIntentData(boolean localOnly, long olderThan) {
if (localOnly || olderThan > 0) {
long older = System.nanoTime() - olderThan * 1_000_000; //convert ms to ns
final SystemClockTimestamp time = new SystemClockTimestamp(older);
return current.values().stream()
.filter(data -> data.version().isOlderThan(time) &&
(!localOnly || isMaster(data.key())))
.collect(Collectors.toList());
}
return Lists.newArrayList(current.values());
}
@Override
public IntentState getIntentState(Key intentKey) {
IntentData data = current.get(intentKey);
return (data != null) ? data.state() : null;
}
@Override
public List<Intent> getInstallableIntents(Key intentKey) {
IntentData data = current.get(intentKey);
if (data != null) {
return data.installables();
}
return null;
}
@Override
public void write(IntentData newData) {
checkNotNull(newData);
synchronized (this) {
// TODO this could be refactored/cleaned up
IntentData currentData = current.get(newData.key());
IntentData pendingData = pending.get(newData.key());
if (IntentData.isUpdateAcceptable(currentData, newData)) {
if (pendingData != null) {
if (pendingData.state() == PURGE_REQ) {
current.remove(newData.key(), newData);
} else {
current.put(newData.key(), new IntentData(newData));
}
if (pendingData.version().compareTo(newData.version()) <= 0) {
// pendingData version is less than or equal to newData's
// Note: a new update for this key could be pending (it's version will be greater)
pending.remove(newData.key());
}
}
notifyDelegateIfNotNull(IntentEvent.getEvent(newData));
}
}
}
private void notifyDelegateIfNotNull(IntentEvent event) {
if (event != null) {
notifyDelegate(event);
}
}
@Override
public void batchWrite(Iterable<IntentData> updates) {
for (IntentData data : updates) {
write(data);
}
}
@Override
public Intent getIntent(Key key) {
IntentData data = current.get(key);
return (data != null) ? data.intent() : null;
}
@Override
public IntentData getIntentData(Key key) {
IntentData currentData = current.get(key);
if (currentData == null) {
return null;
}
return new IntentData(currentData);
}
@Override
public void addPending(IntentData data) {
if (data.version() == null) { // recompiled intents will already have a version
data.setVersion(new SystemClockTimestamp());
}
synchronized (this) {
IntentData existingData = pending.get(data.key());
if (existingData == null ||
// existing version is strictly less than data's version
// Note: if they are equal, we already have the update
// TODO maybe we should still make this <= to be safe?
existingData.version().compareTo(data.version()) < 0) {
pending.put(data.key(), data);
checkNotNull(delegate, "Store delegate is not set")
.process(new IntentData(data));
notifyDelegateIfNotNull(IntentEvent.getEvent(data));
} else {
log.debug("IntentData {} is older than existing: {}",
data, existingData);
}
//TODO consider also checking the current map at this point
}
}
@Override
public boolean isMaster(Key intentKey) {
return true;
}
@Override
public Iterable<Intent> getPending() {
return pending.values().stream()
.map(IntentData::intent)
.collect(Collectors.toList());
}
@Override
public Iterable<IntentData> getPendingData() {
return Lists.newArrayList(pending.values());
}
@Override
public Iterable<IntentData> getPendingData(boolean localOnly, long olderThan) {
long older = System.nanoTime() - olderThan * 1_000_000; //convert ms to ns
final SystemClockTimestamp time = new SystemClockTimestamp(older);
return pending.values().stream()
.filter(data -> data.version().isOlderThan(time) &&
(!localOnly || isMaster(data.key())))
.collect(Collectors.toList());
}
}
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