| /* |
| * 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.nlpcraft.server.ignite |
| |
| import javax.cache.Cache.Entry |
| import org.apache.ignite.cache.CacheAtomicityMode |
| import org.apache.ignite.cache.store.{CacheStoreAdapter, CacheStoreSession} |
| import org.apache.ignite.configuration.CacheConfiguration |
| import org.apache.ignite.resources.CacheStoreSessionResource |
| import org.apache.ignite.{IgniteException, Ignition} |
| import org.apache.nlpcraft.common._ |
| import org.apache.nlpcraft.server.tx.NCTxManager |
| |
| import scala.util.control.Exception._ |
| |
| /** |
| * Base cache store. |
| */ |
| abstract class NCIgniteCacheStore[K, V] extends CacheStoreAdapter[K, V] with Serializable { |
| @CacheStoreSessionResource |
| protected var ses: CacheStoreSession = _ |
| |
| /** |
| * Partial function that catches database 'NCE' and wraps it into Ignite exception. |
| * |
| * @tparam R Type of the return value for the body. |
| * @return Catcher. |
| */ |
| protected def wrapNCE[R]: Catcher[R] = { |
| // We assume here that NCR exception is database related. |
| case e: NCE ⇒ |
| println(s"|> Wrapping NCE: ${e.toString}") |
| |
| if (e.getCause != null) { |
| println(s"|> |") |
| println(s"|> +--- Immediate cause: ${e.getCause.toString}") |
| } |
| |
| throw new IgniteException("Cache store error.", e) |
| } |
| |
| /** |
| * Ensures that current thread is associated with ongoing transaction. |
| */ |
| @throws[NCE] |
| protected def ensureInTx(): Unit = { |
| if (!NCTxManager.inTx()) |
| throw new NCE(s"Thread NOT in transaction: ${Thread.currentThread()}") |
| } |
| |
| /** |
| * |
| */ |
| @throws[NCE] |
| protected def ensureTransactionAtomicity(): Unit = { |
| if (ses != null) { |
| val cfg = Ignition.localIgnite().getOrCreateCache[K, V](ses.cacheName). |
| getConfiguration(classOf[CacheConfiguration[K, V]]) |
| |
| if (cfg.getAtomicityMode != CacheAtomicityMode.TRANSACTIONAL) |
| throw new NCE(s"Cache has non-transactional atomicity: ${ses.cacheName()}") |
| } |
| } |
| |
| /** |
| * Adapter for writing key-value entry to the external storage. |
| * |
| * Must be implemented in the cache store. |
| * |
| * @param key Key to the cache entry. |
| * @param value Value to the cache entry. |
| */ |
| @throws[IgniteException] |
| protected def put(key: K, value: V): Unit |
| |
| /** |
| * Adapter for loading value from the external storage. |
| * |
| * Must be implemented in the cache store. |
| * |
| * @param key Key to the cache entry. |
| */ |
| @throws[IgniteException] |
| protected def get(key: K): V |
| |
| /** |
| * Adapter for deleting cache entry. |
| * |
| * Must be implemented in the cache store. |
| * |
| * @param key The key that is used for the delete operation. |
| */ |
| @throws[IgniteException] |
| protected def remove(key: K): Unit |
| |
| /** |
| * Loads a value from external storage. |
| * |
| * @param key Key to the cache entry. |
| */ |
| @throws[IgniteException] |
| override def load(key: K): V = { |
| get(key) |
| } |
| |
| /** |
| * Write the specified value under the specified key to the external resource. |
| * |
| * @param e Key-value entry to write. |
| */ |
| @throws[IgniteException] |
| override def write(e: Entry[_ <: K, _ <: V]): Unit = { |
| put(e.getKey, e.getValue) |
| } |
| |
| /** |
| * Delete the cache entry from the external resource. |
| * |
| * @param key Key to the cache entry. |
| */ |
| @throws[IgniteException] |
| override def delete(key: scala.Any): Unit = remove(key.asInstanceOf[K]) |
| } |