| /** |
| * 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.camel.component.jcache; |
| |
| import javax.cache.Cache; |
| import javax.cache.configuration.CacheEntryListenerConfiguration; |
| import javax.cache.configuration.Factory; |
| import javax.cache.configuration.MutableCacheEntryListenerConfiguration; |
| import javax.cache.event.CacheEntryEvent; |
| import javax.cache.event.CacheEntryEventFilter; |
| import javax.cache.event.CacheEntryListener; |
| |
| import org.apache.camel.Exchange; |
| import org.apache.camel.Message; |
| import org.apache.camel.Processor; |
| import org.apache.camel.impl.DefaultConsumer; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * The JCache consumer. |
| */ |
| public class JCacheConsumer extends DefaultConsumer { |
| private static final Logger LOGGER = LoggerFactory.getLogger(JCacheConsumer.class); |
| |
| private CacheEntryListenerConfiguration<Object, Object> entryListenerConfiguration; |
| |
| public JCacheConsumer(final JCacheEndpoint endpoint, Processor processor) { |
| super(endpoint, processor); |
| this.entryListenerConfiguration = null; |
| } |
| |
| @Override |
| protected void doStart() throws Exception { |
| if (entryListenerConfiguration != null) { |
| getCache().deregisterCacheEntryListener(entryListenerConfiguration); |
| } |
| |
| entryListenerConfiguration = createEntryListenerConfiguration(); |
| getCache().registerCacheEntryListener(entryListenerConfiguration); |
| |
| super.doStart(); |
| } |
| |
| @Override |
| protected void doStop() throws Exception { |
| if (entryListenerConfiguration != null) { |
| getCache().deregisterCacheEntryListener(entryListenerConfiguration); |
| entryListenerConfiguration = null; |
| } |
| |
| super.doStop(); |
| } |
| |
| private JCacheEndpoint getJCacheEndpoint() { |
| return (JCacheEndpoint)getEndpoint(); |
| } |
| |
| private Cache getCache() throws Exception { |
| return getJCacheEndpoint().getManager().getCache(); |
| } |
| |
| private CacheEntryListenerConfiguration<Object, Object> createEntryListenerConfiguration() { |
| return new MutableCacheEntryListenerConfiguration<>( |
| new Factory<CacheEntryListener<Object, Object>>() { |
| @Override |
| public CacheEntryListener<Object, Object> create() { |
| return new JCacheEntryEventListener() { |
| @Override |
| protected void onEvents(Iterable<CacheEntryEvent<?, ?>> events) { |
| for (CacheEntryEvent<?, ?> event : events) { |
| Exchange exchange = getEndpoint().createExchange(); |
| Message message = exchange.getIn(); |
| message.setHeader(JCacheConstants.EVENT_TYPE, event.getEventType().name()); |
| message.setHeader(JCacheConstants.KEY, event.getKey()); |
| message.setBody(event.getValue()); |
| |
| if (event.isOldValueAvailable()) { |
| message.setHeader(JCacheConstants.OLD_VALUE, event.getOldValue()); |
| } |
| |
| try { |
| getProcessor().process(exchange); |
| } catch (Exception e) { |
| LOGGER.error("Error processing event ", e); |
| } |
| } |
| } |
| }; |
| } |
| }, |
| new Factory<CacheEntryEventFilter<Object, Object>>() { |
| @Override |
| public CacheEntryEventFilter<Object, Object> create() { |
| return getJCacheEndpoint().getManager().getEventFilter(); |
| } |
| }, |
| getJCacheEndpoint().getManager().getConfiguration().isOldValueRequired(), |
| getJCacheEndpoint().getManager().getConfiguration().isSynchronous() |
| ); |
| } |
| } |