| /* |
| * 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.cache.hibernate; |
| |
| import java.io.Externalizable; |
| import java.io.IOException; |
| import java.io.ObjectInput; |
| import java.io.ObjectOutput; |
| import org.apache.ignite.Ignite; |
| import org.apache.ignite.IgniteCheckedException; |
| import org.apache.ignite.IgniteLogger; |
| import org.apache.ignite.internal.IgniteKernal; |
| import org.apache.ignite.internal.processors.cache.IgniteInternalCache; |
| import org.apache.ignite.internal.util.typedef.internal.U; |
| import org.apache.ignite.lang.IgniteCallable; |
| import org.apache.ignite.resources.IgniteInstanceResource; |
| import org.jetbrains.annotations.Nullable; |
| |
| /** |
| * Common interface used to implement Hibernate L2 cache access strategies. |
| * <p> |
| * The expected sequences of steps related to various CRUD operations executed by Hibernate are: |
| * <p> |
| * Insert: |
| * <ul> |
| * <li>Start DB transaction.</li> |
| * <li>Execute database insert.</li> |
| * <li>Call {@link HibernateAccessStrategyAdapter#insert}.</li> |
| * <li>Commit DB transaction.</li> |
| * <li>Call {@link HibernateAccessStrategyAdapter#afterInsert}.</li> |
| * </ul> |
| * In case if some step fails and DB transaction is rolled back then |
| * {@link HibernateAccessStrategyAdapter#afterInsert} is not called. |
| * <p> |
| * Update: |
| * <ul> |
| * <li>Start DB transaction.</li> |
| * <li>Call {@link HibernateAccessStrategyAdapter#lock}.</li> |
| * <li>Execute database update.</li> |
| * <li>Call {@link HibernateAccessStrategyAdapter#update}.</li> |
| * <li>Commit DB transaction.</li> |
| * <li>Call {@link HibernateAccessStrategyAdapter#afterUpdate}.</li> |
| * </ul> |
| * In case if {@link HibernateAccessStrategyAdapter#lock} was called, but some other step fails and DB |
| * transaction is rolled back then {@link HibernateAccessStrategyAdapter#unlock} is called for all locked keys. |
| * <p> |
| * Delete: |
| * <ul> |
| * <li>Start DB transaction.</li> |
| * <li>Call {@link HibernateAccessStrategyAdapter#lock} for removing key.</li> |
| * <li>Execute database delete.</li> |
| * <li>Call {@link HibernateAccessStrategyAdapter#remove}.</li> |
| * <li>Commit DB transaction.</li> |
| * <li>Call {@link HibernateAccessStrategyAdapter#unlock}.</li> |
| * </ul> |
| * In case if {@link HibernateAccessStrategyAdapter#lock} was called, but some other step fails and DB |
| * transaction is rolled back then {@link HibernateAccessStrategyAdapter#unlock} is called for all locked keys. |
| * <p> |
| * In case if custom SQL update query is executed Hibernate clears entire cache region, |
| * for this case operations sequence is: |
| * <ul> |
| * <li>Start DB transaction.</li> |
| * <li>Call {@link HibernateAccessStrategyAdapter#lockRegion}.</li> |
| * <li>Execute database query.</li> |
| * <li>Call {@link HibernateAccessStrategyAdapter#removeAll}.</li> |
| * <li>Commit DB transaction.</li> |
| * <li>Call {@link HibernateAccessStrategyAdapter#unlockRegion}.</li> |
| * </ul> |
| */ |
| public abstract class HibernateAccessStrategyAdapter { |
| /** */ |
| protected final HibernateCacheProxy cache; |
| |
| /** */ |
| private final HibernateExceptionConverter eConverter; |
| |
| /** Grid. */ |
| protected final Ignite ignite; |
| |
| /** */ |
| protected final IgniteLogger log; |
| |
| /** |
| * @param ignite Node. |
| * @param cache Cache. |
| * @param eConverter Exception converter. |
| */ |
| protected HibernateAccessStrategyAdapter( |
| Ignite ignite, |
| HibernateCacheProxy cache, |
| HibernateExceptionConverter eConverter) { |
| this.cache = cache; |
| this.ignite = ignite; |
| this.eConverter = eConverter; |
| |
| log = ignite.log().getLogger(getClass()); |
| } |
| |
| /** |
| * @param e Exception. |
| * @return Runtime exception to be thrown. |
| */ |
| final RuntimeException convertException(Exception e) { |
| return eConverter.convert(e); |
| } |
| |
| /** |
| * @param key Key. |
| * @return Cached value. |
| */ |
| @Nullable public Object get(Object key) { |
| try { |
| Object val = cache.get(key); |
| |
| if (log.isDebugEnabled()) |
| log.debug("Get [cache=" + cache.name() + ", key=" + key + ", val=" + val + ']'); |
| |
| return val; |
| } |
| catch (IgniteCheckedException e) { |
| throw convertException(e); |
| } |
| } |
| |
| /** |
| * @param key Key. |
| * @param val Value. |
| * @param minimalPutOverride MinimalPut flag |
| */ |
| public void putFromLoad(Object key, Object val, boolean minimalPutOverride) { |
| putFromLoad(key, val); |
| } |
| |
| /** |
| * Puts in cache value loaded from the database. |
| * |
| * @param key Key. |
| * @param val Value. |
| */ |
| public void putFromLoad(Object key, Object val) { |
| if (log.isDebugEnabled()) |
| log.debug("Put from load [cache=" + cache.name() + ", key=" + key + ", val=" + val + ']'); |
| |
| try { |
| cache.put(key, val); |
| } |
| catch (IgniteCheckedException e) { |
| throw convertException(e); |
| } |
| } |
| |
| /** |
| * Called during database transaction execution before Hibernate attempts to update or remove given key. |
| * |
| * @param key Key. |
| */ |
| public abstract void lock(Object key); |
| |
| /** |
| * Called after Hibernate failed to update or successfully removed given key. |
| * |
| * @param key Key. |
| */ |
| public abstract void unlock(Object key); |
| |
| /** |
| * Called after Hibernate updated object in the database but before transaction completed. |
| * |
| * @param key Key. |
| * @param val Value. |
| * @return {@code True} if operation updated cache. |
| */ |
| public abstract boolean update(Object key, Object val); |
| |
| /** |
| * Called after Hibernate updated object in the database and transaction successfully completed. |
| * |
| * @param key Key. |
| * @param val Value. |
| * @return {@code True} if operation updated cache. |
| */ |
| public abstract boolean afterUpdate(Object key, Object val); |
| |
| /** |
| * Called after Hibernate inserted object in the database but before transaction completed. |
| * |
| * @param key Key. |
| * @param val Value. |
| * @return {@code True} if operation updated cache. |
| */ |
| public abstract boolean insert(Object key, Object val); |
| |
| /** |
| * Called after Hibernate inserted object in the database and transaction successfully completed. |
| * |
| * @param key Key. |
| * @param val Value. |
| * @return {@code True} if operation updated cache. |
| */ |
| public abstract boolean afterInsert(Object key, Object val); |
| |
| /** |
| * Called after Hibernate removed object from database but before transaction completed. |
| * |
| * @param key Key, |
| */ |
| public abstract void remove(Object key); |
| |
| /** |
| * Called to remove object from cache without regard to transaction. |
| * |
| * @param key Key. |
| */ |
| public void evict(Object key) { |
| evict(ignite, cache, key); |
| } |
| |
| /** |
| * Called to remove all data from cache without regard to transaction. |
| */ |
| public void evictAll() { |
| if (log.isDebugEnabled()) |
| log.debug("Evict all [cache=" + cache.name() + ']'); |
| |
| try { |
| evictAll(cache); |
| } |
| catch (IgniteCheckedException e) { |
| throw convertException(e); |
| } |
| } |
| |
| /** |
| * Called during database transaction execution to clear entire cache region after |
| * Hibernate executed database update, but before transaction completed. |
| */ |
| public final void removeAll() { |
| evictAll(); |
| } |
| |
| /** |
| * Called during database transaction execution before Hibernate executed |
| * update operation which should invalidate entire cache region. |
| */ |
| public void lockRegion() { |
| // No-op. |
| } |
| |
| /** |
| * Called after transaction clearing entire cache region completed. |
| */ |
| public void unlockRegion() { |
| // No-op. |
| } |
| |
| /** |
| * Called to remove object from cache without regard to transaction. |
| * |
| * @param ignite Grid. |
| * @param cache Cache. |
| * @param key Key. |
| */ |
| public static void evict(Ignite ignite, HibernateCacheProxy cache, Object key) { |
| key = cache.keyTransformer().transform(key); |
| |
| ignite.compute(ignite.cluster()).call(new ClearKeyCallable(key, cache.name())); |
| } |
| |
| /** |
| * Called to remove all data from cache without regard to transaction. |
| * |
| * @param cache Cache. |
| * @throws IgniteCheckedException If failed. |
| */ |
| public static void evictAll(IgniteInternalCache<Object, Object> cache) throws IgniteCheckedException { |
| cache.clear(); |
| } |
| |
| /** |
| * Callable invalidates given key. |
| */ |
| private static class ClearKeyCallable implements IgniteCallable<Void>, Externalizable { |
| /** */ |
| private static final long serialVersionUID = 0L; |
| |
| /** */ |
| @IgniteInstanceResource |
| private Ignite ignite; |
| |
| /** */ |
| private Object key; |
| |
| /** */ |
| private String cacheName; |
| |
| /** |
| * Empty constructor required by {@link Externalizable}. |
| */ |
| public ClearKeyCallable() { |
| // No-op. |
| } |
| |
| /** |
| * @param key Key to clear. |
| * @param cacheName Cache name. |
| */ |
| private ClearKeyCallable(Object key, String cacheName) { |
| this.key = key; |
| this.cacheName = cacheName; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public Void call() throws IgniteCheckedException { |
| IgniteInternalCache<Object, Object> cache = ((IgniteKernal)ignite).getCache(cacheName); |
| |
| assert cache != null; |
| |
| cache.clearLocally(key); |
| |
| return null; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public void writeExternal(ObjectOutput out) throws IOException { |
| out.writeObject(key); |
| |
| U.writeString(out, cacheName); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException { |
| key = in.readObject(); |
| |
| cacheName = U.readString(in); |
| } |
| } |
| } |