| /* |
| * 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.lang.reflect.Field; |
| import org.apache.ignite.Ignite; |
| import org.apache.ignite.IgniteCheckedException; |
| import org.apache.ignite.IgniteLogger; |
| import org.apache.ignite.cache.affinity.AffinityKey; |
| import org.apache.ignite.cache.affinity.AffinityKeyMapped; |
| import org.apache.ignite.cache.affinity.AffinityKeyMapper; |
| import org.apache.ignite.configuration.CacheConfiguration; |
| import org.apache.ignite.internal.util.GridArgumentCheck; |
| import org.apache.ignite.internal.util.GridReflectionCache; |
| import org.apache.ignite.internal.util.typedef.P1; |
| import org.apache.ignite.internal.util.typedef.internal.U; |
| import org.apache.ignite.resources.IgniteInstanceResource; |
| import org.apache.ignite.resources.LoggerResource; |
| import org.jetbrains.annotations.Nullable; |
| |
| /** |
| * Default key affinity mapper. If key class has annotation {@link AffinityKeyMapped}, |
| * then the value of annotated field will be used to get affinity value instead |
| * of the key itself. If there is no annotation, then the key is used as is. |
| * <p> |
| * Convenience affinity key adapter, {@link AffinityKey} can be used in |
| * conjunction with this mapper to automatically provide custom affinity keys for cache keys. |
| * <p> |
| * If non-default affinity mapper is used, is should be provided via |
| * {@link CacheConfiguration#getAffinityMapper()} configuration property. |
| */ |
| public class GridCacheDefaultAffinityKeyMapper implements AffinityKeyMapper { |
| /** */ |
| private static final long serialVersionUID = 0L; |
| |
| /** Injected ignite instance. */ |
| protected transient Ignite ignite; |
| |
| /** Reflection cache. */ |
| private GridReflectionCache reflectCache = new GridReflectionCache( |
| new P1<Field>() { |
| @Override public boolean apply(Field f) { |
| // Account for anonymous inner classes. |
| return f.getAnnotation(AffinityKeyMapped.class) != null; |
| } |
| }, |
| null |
| ); |
| |
| /** Logger. */ |
| @LoggerResource |
| protected transient IgniteLogger log; |
| |
| /** |
| * If key class has annotation {@link AffinityKeyMapped}, |
| * then the value of annotated method or field will be used to get affinity value instead |
| * of the key itself. If there is no annotation, then the key is returned as is. |
| * |
| * @param key Key to get affinity key for. |
| * @return Affinity key for given key. |
| */ |
| @Override public Object affinityKey(Object key) { |
| GridArgumentCheck.notNull(key, "key"); |
| |
| try { |
| Object o = reflectCache.firstFieldValue(key); |
| |
| if (o != null) |
| return o; |
| } |
| catch (IgniteCheckedException e) { |
| U.error(log, "Failed to access affinity field for key [field=" + |
| reflectCache.firstField(key.getClass()) + ", key=" + key + ']', e); |
| } |
| |
| return key; |
| } |
| |
| /** |
| * @param cls Key class. |
| * @return Name of |
| */ |
| @Nullable public String affinityKeyPropertyName(Class<?> cls) { |
| Field field = reflectCache.firstField(cls); |
| |
| if (field != null) |
| return field.getName(); |
| |
| return null; |
| } |
| |
| /** |
| * @param ignite Ignite. |
| */ |
| @IgniteInstanceResource |
| public void ignite(Ignite ignite) { |
| this.ignite = ignite; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public void reset() { |
| // No-op. |
| } |
| } |