diff options
Diffstat (limited to 'framework/src/onos/core/store/dist/src/main/java/org/onosproject/store/consistent/impl/DefaultAtomicValue.java')
-rw-r--r-- | framework/src/onos/core/store/dist/src/main/java/org/onosproject/store/consistent/impl/DefaultAtomicValue.java | 138 |
1 files changed, 0 insertions, 138 deletions
diff --git a/framework/src/onos/core/store/dist/src/main/java/org/onosproject/store/consistent/impl/DefaultAtomicValue.java b/framework/src/onos/core/store/dist/src/main/java/org/onosproject/store/consistent/impl/DefaultAtomicValue.java deleted file mode 100644 index e8c93f31..00000000 --- a/framework/src/onos/core/store/dist/src/main/java/org/onosproject/store/consistent/impl/DefaultAtomicValue.java +++ /dev/null @@ -1,138 +0,0 @@ -/* - * 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.consistent.impl; - -import org.onosproject.store.service.AtomicValue; -import org.onosproject.store.service.AtomicValueEvent; -import org.onosproject.store.service.AtomicValueEventListener; -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.Versioned; - -import java.util.Set; -import java.util.concurrent.CopyOnWriteArraySet; - -/** - * Default implementation of AtomicValue. - * - * @param <V> value type - */ -public class DefaultAtomicValue<V> implements AtomicValue<V> { - - private final Set<AtomicValueEventListener<V>> listeners = new CopyOnWriteArraySet<>(); - private final ConsistentMap<String, byte[]> valueMap; - private final String name; - private final Serializer serializer; - private final MapEventListener<String, byte[]> mapEventListener = new InternalMapEventListener(); - private final MeteringAgent monitor; - - private static final String COMPONENT_NAME = "atomicValue"; - private static final String GET = "get"; - private static final String GET_AND_SET = "getAndSet"; - private static final String COMPARE_AND_SET = "compareAndSet"; - - public DefaultAtomicValue(ConsistentMap<String, byte[]> valueMap, - String name, - boolean meteringEnabled, - Serializer serializer) { - this.valueMap = valueMap; - this.name = name; - this.serializer = serializer; - this.monitor = new MeteringAgent(COMPONENT_NAME, name, meteringEnabled); - } - - @Override - public boolean compareAndSet(V expect, V update) { - final MeteringAgent.Context newTimer = monitor.startTimer(COMPARE_AND_SET); - try { - if (expect == null) { - if (update == null) { - return true; - } - return valueMap.putIfAbsent(name, serializer.encode(update)) == null; - } else { - if (update == null) { - return valueMap.remove(name, serializer.encode(expect)); - } - return valueMap.replace(name, serializer.encode(expect), serializer.encode(update)); - } - } finally { - newTimer.stop(null); - } - } - - @Override - public V get() { - final MeteringAgent.Context newTimer = monitor.startTimer(GET); - try { - Versioned<byte[]> rawValue = valueMap.get(name); - return rawValue == null ? null : serializer.decode(rawValue.value()); - } finally { - newTimer.stop(null); - } - } - - @Override - public V getAndSet(V value) { - final MeteringAgent.Context newTimer = monitor.startTimer(GET_AND_SET); - try { - Versioned<byte[]> previousValue = value == null ? - valueMap.remove(name) : valueMap.put(name, serializer.encode(value)); - return previousValue == null ? null : serializer.decode(previousValue.value()); - } finally { - newTimer.stop(null); - } - } - - @Override - public void set(V value) { - getAndSet(value); - } - - @Override - public void addListener(AtomicValueEventListener<V> listener) { - synchronized (listeners) { - if (listeners.add(listener)) { - if (listeners.size() == 1) { - valueMap.addListener(mapEventListener); - } - } - } - } - - @Override - public void removeListener(AtomicValueEventListener<V> listener) { - synchronized (listeners) { - if (listeners.remove(listener)) { - if (listeners.size() == 0) { - valueMap.removeListener(mapEventListener); - } - } - } - } - - private class InternalMapEventListener implements MapEventListener<String, byte[]> { - - @Override - public void event(MapEvent<String, byte[]> mapEvent) { - V newValue = mapEvent.type() == MapEvent.Type.REMOVE ? null : serializer.decode(mapEvent.value().value()); - AtomicValueEvent<V> atomicValueEvent = new AtomicValueEvent<>(name, AtomicValueEvent.Type.UPDATE, newValue); - listeners.forEach(l -> l.event(atomicValueEvent)); - } - } -} |