diff options
Diffstat (limited to 'framework/src/onos/core/store/dist/src/main/java/org/onosproject/store/consistent/impl/AsyncCachingConsistentMap.java')
-rw-r--r-- | framework/src/onos/core/store/dist/src/main/java/org/onosproject/store/consistent/impl/AsyncCachingConsistentMap.java | 81 |
1 files changed, 0 insertions, 81 deletions
diff --git a/framework/src/onos/core/store/dist/src/main/java/org/onosproject/store/consistent/impl/AsyncCachingConsistentMap.java b/framework/src/onos/core/store/dist/src/main/java/org/onosproject/store/consistent/impl/AsyncCachingConsistentMap.java deleted file mode 100644 index 92db5b44..00000000 --- a/framework/src/onos/core/store/dist/src/main/java/org/onosproject/store/consistent/impl/AsyncCachingConsistentMap.java +++ /dev/null @@ -1,81 +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 java.util.concurrent.CompletableFuture; - -import org.onosproject.core.ApplicationId; -import org.onosproject.store.service.Serializer; -import org.onosproject.store.service.Versioned; - -import com.google.common.cache.CacheBuilder; -import com.google.common.cache.CacheLoader; -import com.google.common.cache.LoadingCache; - -/** - * Extension of {@link DefaultAsyncConsistentMap} that provides a weaker read consistency - * guarantee in return for better read performance. - * <p> - * For read/write operations that are local to a node this map implementation provides - * guarantees similar to a ConsistentMap. However for read/write operations executed - * across multiple nodes this implementation only provides eventual consistency. - * - * @param <K> key type - * @param <V> value type - */ -public class AsyncCachingConsistentMap<K, V> extends DefaultAsyncConsistentMap<K, V> { - - private final LoadingCache<K, CompletableFuture<Versioned<V>>> cache = - CacheBuilder.newBuilder() - .maximumSize(10000) // TODO: make configurable - .build(new CacheLoader<K, CompletableFuture<Versioned<V>>>() { - @Override - public CompletableFuture<Versioned<V>> load(K key) - throws Exception { - return AsyncCachingConsistentMap.super.get(key); - } - }); - - public AsyncCachingConsistentMap(String name, - ApplicationId applicationId, - Database database, - Serializer serializer, - boolean readOnly, - boolean purgeOnUninstall, - boolean meteringEnabled) { - super(name, applicationId, database, serializer, readOnly, purgeOnUninstall, meteringEnabled); - addListener(event -> cache.invalidate(event.key())); - } - - @Override - public CompletableFuture<Versioned<V>> get(K key) { - CompletableFuture<Versioned<V>> cachedValue = cache.getIfPresent(key); - if (cachedValue != null) { - if (cachedValue.isCompletedExceptionally()) { - cache.invalidate(key); - } else { - return cachedValue; - } - } - return cache.getUnchecked(key); - } - - @Override - protected void beforeUpdate(K key) { - super.beforeUpdate(key); - cache.invalidate(key); - } -}
\ No newline at end of file |