| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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.apache.ignite.internal.processors.cache; |
| |
| import java.util.Collections; |
| import java.util.Set; |
| import org.apache.ignite.internal.processors.affinity.AffinityTopologyVersion; |
| import org.apache.ignite.internal.processors.cache.distributed.dht.GridDhtCacheEntry; |
| import org.jetbrains.annotations.Nullable; |
| |
| /** |
| * Empty cache map that will never store any entries. |
| */ |
| public class GridNoStorageCacheMap implements GridCacheConcurrentMap { |
| /** {@inheritDoc} */ |
| @Nullable @Override public GridCacheMapEntry getEntry(GridCacheContext ctx, KeyCacheObject key) { |
| return null; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public GridCacheMapEntry putEntryIfObsoleteOrAbsent(GridCacheContext ctx, AffinityTopologyVersion topVer, |
| KeyCacheObject key, |
| boolean create, |
| boolean touch) { |
| if (create) |
| return new GridDhtCacheEntry(ctx, topVer, key); |
| else |
| return null; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public boolean removeEntry(GridCacheEntryEx entry) { |
| throw new AssertionError(); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public int internalSize() { |
| return 0; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public int publicSize(int cacheId) { |
| return 0; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public void incrementPublicSize(CacheMapHolder hld, GridCacheEntryEx e) { |
| // No-op. |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public void decrementPublicSize(CacheMapHolder hld, GridCacheEntryEx e) { |
| // No-op. |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public Iterable<GridCacheMapEntry> entries(int cacheId, CacheEntryPredicate... filter) { |
| return Collections.emptySet(); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public Set<GridCacheMapEntry> entrySet(int cacheId, CacheEntryPredicate... filter) { |
| return Collections.emptySet(); |
| } |
| } |