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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.incubator.net.meter.impl;
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.Reference;
import org.apache.felix.scr.annotations.ReferenceCardinality;
import org.apache.felix.scr.annotations.Service;
import org.onlab.util.TriConsumer;
import org.onosproject.net.meter.DefaultMeter;
import org.onosproject.net.meter.Meter;
import org.onosproject.net.meter.MeterEvent;
import org.onosproject.net.meter.MeterFailReason;
import org.onosproject.net.meter.MeterId;
import org.onosproject.net.meter.MeterKey;
import org.onosproject.net.meter.MeterListener;
import org.onosproject.net.meter.MeterOperation;
import org.onosproject.net.meter.MeterProvider;
import org.onosproject.net.meter.MeterProviderRegistry;
import org.onosproject.net.meter.MeterProviderService;
import org.onosproject.net.meter.MeterRequest;
import org.onosproject.net.meter.MeterService;
import org.onosproject.net.meter.MeterState;
import org.onosproject.net.meter.MeterStore;
import org.onosproject.net.meter.MeterStoreDelegate;
import org.onosproject.net.meter.MeterStoreResult;
import org.onosproject.net.DeviceId;
import org.onosproject.net.provider.AbstractListenerProviderRegistry;
import org.onosproject.net.provider.AbstractProviderService;
import org.onosproject.store.service.AtomicCounter;
import org.onosproject.store.service.StorageService;
import org.slf4j.Logger;
import java.util.Collection;
import java.util.Map;
import java.util.stream.Collectors;
import static org.slf4j.LoggerFactory.getLogger;
/**
* Provides implementation of the meter service APIs.
*/
@Component(immediate = true, enabled = true)
@Service
public class MeterManager extends AbstractListenerProviderRegistry<MeterEvent, MeterListener,
MeterProvider, MeterProviderService>
implements MeterService, MeterProviderRegistry {
private static final String METERCOUNTERIDENTIFIER = "meter-id-counter-%s";
private final Logger log = getLogger(getClass());
private final MeterStoreDelegate delegate = new InternalMeterStoreDelegate();
@Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
protected StorageService storageService;
@Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
protected MeterStore store;
private Map<DeviceId, AtomicCounter> meterIdCounters
= Maps.newConcurrentMap();
private TriConsumer<MeterRequest, MeterStoreResult, Throwable> onComplete;
@Activate
public void activate() {
store.setDelegate(delegate);
onComplete = (request, result, error) ->
{
request.context().ifPresent(c -> {
if (error != null) {
c.onError(request, MeterFailReason.UNKNOWN);
} else {
if (result.reason().isPresent()) {
c.onError(request, result.reason().get());
} else {
c.onSuccess(request);
}
}
});
};
log.info("Started");
}
@Deactivate
public void deactivate() {
store.unsetDelegate(delegate);
log.info("Stopped");
}
@Override
protected MeterProviderService createProviderService(MeterProvider provider) {
return new InternalMeterProviderService(provider);
}
@Override
public Meter submit(MeterRequest request) {
MeterId id = allocateMeterId(request.deviceId());
Meter.Builder mBuilder = DefaultMeter.builder()
.forDevice(request.deviceId())
.fromApp(request.appId())
.withBands(request.bands())
.withId(id)
.withUnit(request.unit());
if (request.isBurst()) {
mBuilder.burst();
}
DefaultMeter m = (DefaultMeter) mBuilder.build();
m.setState(MeterState.PENDING_ADD);
store.storeMeter(m).whenComplete((result, error) ->
onComplete.accept(request, result, error));
return m;
}
@Override
public void withdraw(MeterRequest request, MeterId meterId) {
Meter.Builder mBuilder = DefaultMeter.builder()
.forDevice(request.deviceId())
.fromApp(request.appId())
.withBands(request.bands())
.withId(meterId)
.withUnit(request.unit());
if (request.isBurst()) {
mBuilder.burst();
}
DefaultMeter m = (DefaultMeter) mBuilder.build();
m.setState(MeterState.PENDING_REMOVE);
store.deleteMeter(m).whenComplete((result, error) ->
onComplete.accept(request, result, error));
}
@Override
public Meter getMeter(DeviceId deviceId, MeterId id) {
MeterKey key = MeterKey.key(deviceId, id);
return store.getMeter(key);
}
@Override
public Collection<Meter> getAllMeters() {
return store.getAllMeters();
}
private MeterId allocateMeterId(DeviceId deviceId) {
long id = meterIdCounters.compute(deviceId, (k, v) -> {
if (v == null) {
return allocateCounter(k);
}
return v;
}).incrementAndGet();
return MeterId.meterId((int) id);
}
private AtomicCounter allocateCounter(DeviceId deviceId) {
return storageService.atomicCounterBuilder()
.withName(String.format(METERCOUNTERIDENTIFIER, deviceId))
.build();
}
private class InternalMeterProviderService
extends AbstractProviderService<MeterProvider>
implements MeterProviderService {
/**
* Creates a provider service on behalf of the specified provider.
*
* @param provider provider to which this service is being issued
*/
protected InternalMeterProviderService(MeterProvider provider) {
super(provider);
}
@Override
public void meterOperationFailed(MeterOperation operation,
MeterFailReason reason) {
store.failedMeter(operation, reason);
}
@Override
public void pushMeterMetrics(DeviceId deviceId, Collection<Meter> meterEntries) {
//FIXME: FOLLOWING CODE CANNOT BE TESTED UNTIL SOMETHING THAT
//FIXME: IMPLEMENTS METERS EXISTS
Map<MeterId, Meter> storedMeterMap = store.getAllMeters().stream()
.collect(Collectors.toMap(Meter::id, m -> m));
meterEntries.stream()
.filter(m -> storedMeterMap.remove(m.id()) != null)
.forEach(m -> store.updateMeterState(m));
storedMeterMap.values().stream().forEach(m -> {
if (m.state() == MeterState.PENDING_ADD) {
provider().performMeterOperation(m.deviceId(),
new MeterOperation(m,
MeterOperation.Type.ADD));
} else {
store.deleteMeterNow(m);
}
});
}
}
private class InternalMeterStoreDelegate implements MeterStoreDelegate {
@Override
public void notify(MeterEvent event) {
DeviceId deviceId = event.subject().deviceId();
MeterProvider p = getProvider(event.subject().deviceId());
switch (event.type()) {
case METER_ADD_REQ:
p.performMeterOperation(deviceId, new MeterOperation(event.subject(),
MeterOperation.Type.ADD));
break;
case METER_REM_REQ:
p.performMeterOperation(deviceId, new MeterOperation(event.subject(),
MeterOperation.Type.REMOVE));
break;
default:
log.warn("Unknown meter event {}", event.type());
}
}
}
}
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