| /** |
| * 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 java.util.Collection; |
| import java.util.Collections; |
| import java.util.Map; |
| import java.util.Set; |
| import javax.cache.Cache; |
| import javax.cache.processor.EntryProcessor; |
| |
| import org.apache.camel.Exchange; |
| import org.apache.camel.Message; |
| import org.apache.camel.impl.DefaultProducer; |
| import org.apache.camel.util.ObjectHelper; |
| |
| /** |
| * The JCache producer. |
| */ |
| public class JCacheProducer extends DefaultProducer { |
| private final JCacheConfiguration configuration; |
| |
| public JCacheProducer(JCacheEndpoint endpoint, JCacheConfiguration configuration) { |
| super(endpoint); |
| |
| this.configuration = configuration; |
| } |
| |
| @Override |
| public void process(Exchange exchange) throws Exception { |
| String actionName = exchange.getIn().getHeader(JCacheConstants.ACTION, String.class); |
| if (actionName == null) { |
| actionName = configuration.getAction(); |
| } |
| |
| ObjectHelper.notEmpty(actionName, JCacheConstants.ACTION); |
| |
| Action action = Action.fromName(actionName); |
| if (action != null) { |
| Cache<Object, Object> cache = getJCacheEndpoint().getManager().getCache(); |
| action.validate(cache, exchange); |
| action.execute(cache, exchange); |
| } else { |
| throw new IllegalArgumentException( |
| String.format("The value '%s' is not allowed for parameter '%s'", actionName, JCacheConstants.ACTION)); |
| } |
| } |
| |
| @Override |
| protected void doStart() throws Exception { |
| getCache(); |
| |
| super.doStart(); |
| } |
| |
| private JCacheEndpoint getJCacheEndpoint() { |
| return (JCacheEndpoint)getEndpoint(); |
| } |
| |
| private Cache getCache() throws Exception { |
| return getJCacheEndpoint().getManager().getCache(); |
| } |
| |
| private enum Action { |
| PUT { |
| @Override |
| void validate(Cache<Object, Object> cache, Exchange exchange) throws Exception { |
| headerIsNotNull(exchange, JCacheConstants.KEY); |
| } |
| |
| @Override |
| void execute(Cache<Object, Object> cache, Exchange exchange) { |
| cache.put( |
| exchange.getIn().getHeader(JCacheConstants.KEY), |
| exchange.getIn().getBody() |
| ); |
| } |
| }, |
| PUTALL { |
| @Override |
| void validate(Cache<Object, Object> cache, Exchange exchange) throws Exception { |
| } |
| |
| @Override |
| void execute(Cache<Object, Object> cache, Exchange exchange) { |
| cache.putAll( |
| exchange.getIn().getBody(Map.class) |
| ); |
| } |
| }, |
| PUTIFABSENT { |
| @Override |
| void validate(Cache<Object, Object> cache, Exchange exchange) throws Exception { |
| headerIsNotNull(exchange, JCacheConstants.KEY); |
| } |
| |
| @Override |
| void execute(Cache<Object, Object> cache, Exchange exchange) { |
| exchange.getIn().setHeader( |
| JCacheConstants.RESULT, |
| cache.putIfAbsent( |
| exchange.getIn().getHeader(JCacheConstants.KEY), |
| exchange.getIn().getBody()) |
| ); |
| } |
| }, |
| GET { |
| @Override |
| void validate(Cache<Object, Object> cache, Exchange exchange) throws Exception { |
| headerIsNotNull(exchange, JCacheConstants.KEY); |
| } |
| |
| @Override |
| void execute(Cache<Object, Object> cache, Exchange exchange) { |
| exchange.getIn().setBody( |
| cache.get(exchange.getIn().getHeader(JCacheConstants.KEY)) |
| ); |
| } |
| }, |
| GETALL { |
| @Override |
| void validate(Cache<Object, Object> cache, Exchange exchange) throws Exception { |
| headerIsNotNull(exchange, JCacheConstants.KEYS); |
| } |
| |
| @Override |
| void execute(Cache<Object, Object> cache, Exchange exchange) { |
| exchange.getIn().setBody( |
| cache.getAll( |
| exchange.getIn().getHeader(JCacheConstants.KEYS, Set.class)) |
| ); |
| } |
| }, |
| GETANDREMOVE { |
| @Override |
| void validate(Cache<Object, Object> cache, Exchange exchange) throws Exception { |
| headerIsNotNull(exchange, JCacheConstants.KEY); |
| } |
| |
| @Override |
| void execute(Cache<Object, Object> cache, Exchange exchange) { |
| exchange.getIn().setBody( |
| cache.getAndRemove( |
| exchange.getIn().getHeader(JCacheConstants.KEY)) |
| ); |
| } |
| }, |
| GETANDREPLACE { |
| @Override |
| void validate(Cache<Object, Object> cache, Exchange exchange) throws Exception { |
| headerIsNotNull(exchange, JCacheConstants.KEY); |
| } |
| |
| @Override |
| void execute(Cache<Object, Object> cache, Exchange exchange) { |
| exchange.getIn().setBody( |
| cache.getAndReplace( |
| exchange.getIn().getHeader(JCacheConstants.KEY), |
| exchange.getIn().getBody()) |
| ); |
| } |
| }, |
| GETANDPUT { |
| @Override |
| void validate(Cache<Object, Object> cache, Exchange exchange) throws Exception { |
| headerIsNotNull(exchange, JCacheConstants.KEY); |
| } |
| |
| @Override |
| void execute(Cache<Object, Object> cache, Exchange exchange) { |
| exchange.getIn().setBody( |
| cache.getAndPut( |
| exchange.getIn().getHeader(JCacheConstants.KEY), |
| exchange.getIn().getBody()) |
| ); |
| } |
| }, |
| REPLACE { |
| @Override |
| void validate(Cache<Object, Object> cache, Exchange exchange) throws Exception { |
| headerIsNotNull(exchange, JCacheConstants.KEY); |
| } |
| |
| @Override |
| void execute(Cache<Object, Object> cache, Exchange exchange) { |
| Object oldValue = exchange.getIn().getHeader(JCacheConstants.OLD_VALUE); |
| |
| exchange.getIn().setHeader( |
| JCacheConstants.RESULT, |
| oldValue != null |
| ? cache.replace( |
| exchange.getIn().getHeader(JCacheConstants.KEY), |
| oldValue, |
| exchange.getIn().getBody()) |
| : cache.replace( |
| exchange.getIn().getHeader(JCacheConstants.KEY), |
| exchange.getIn().getBody()) |
| ); |
| } |
| }, |
| REMOVE { |
| @Override |
| void validate(Cache<Object, Object> cache, Exchange exchange) throws Exception { |
| headerIsNotNull(exchange, JCacheConstants.KEY); |
| } |
| |
| @Override |
| void execute(Cache<Object, Object> cache, Exchange exchange) { |
| Object oldValue = exchange.getIn().getHeader(JCacheConstants.OLD_VALUE); |
| |
| exchange.getIn().setHeader( |
| JCacheConstants.RESULT, |
| oldValue != null |
| ? cache.remove( |
| exchange.getIn().getHeader(JCacheConstants.KEY), |
| oldValue) |
| : cache.remove( |
| exchange.getIn().getHeader(JCacheConstants.KEY)) |
| ); |
| } |
| }, |
| REMOVEALL { |
| @Override |
| void validate(Cache<Object, Object> cache, Exchange exchange) throws Exception { |
| } |
| |
| @Override |
| void execute(Cache<Object, Object> cache, Exchange exchange) { |
| Set<Object> keys = exchange.getIn().getHeader(JCacheConstants.KEYS, Set.class); |
| |
| if (keys != null) { |
| cache.removeAll(keys); |
| } else { |
| cache.removeAll(); |
| } |
| } |
| }, |
| INVOKE { |
| @Override |
| void validate(Cache<Object, Object> cache, Exchange exchange) throws Exception { |
| headerIsNotNull(exchange, JCacheConstants.ENTRY_PROCESSOR); |
| |
| if (exchange.getIn().getHeader(JCacheConstants.KEYS) == null |
| && exchange.getIn().getHeader(JCacheConstants.KEY) == null) { |
| throw new IllegalArgumentException( |
| String.format("Either %s or %s must be set for action %s", |
| JCacheConstants.KEYS, |
| JCacheConstants.KEY, |
| name()) |
| ); |
| } |
| } |
| |
| @Override |
| void execute(Cache<Object, Object> cache, Exchange exchange) { |
| Message message = exchange.getIn(); |
| Set<Object> keys = message.getHeader(JCacheConstants.KEYS, Set.class); |
| EntryProcessor<Object, Object, Object> entryProcessor = message.getHeader(JCacheConstants.ENTRY_PROCESSOR, EntryProcessor.class); |
| |
| Collection<Object> arguments = message.getHeader(JCacheConstants.ARGUMENTS, Collection.class); |
| if (arguments == null) { |
| arguments = Collections.emptyList(); |
| } |
| |
| message.setBody( |
| keys != null |
| ? cache.invokeAll( |
| keys, |
| entryProcessor, |
| arguments) |
| : cache.invoke( |
| exchange.getIn().getHeader(JCacheConstants.KEY), |
| entryProcessor, |
| arguments) |
| ); |
| } |
| }, |
| CLEAR { |
| @Override |
| void validate(Cache<Object, Object> cache, Exchange exchange) throws Exception { |
| } |
| |
| @Override |
| void execute(Cache<Object, Object> cache, Exchange exchange) { |
| cache.clear(); |
| } |
| }; |
| |
| |
| static final Action[] VALUES = values(); |
| |
| static Action fromName(String name) { |
| if (ObjectHelper.isNotEmpty(name)) { |
| for (int i = 0; i < VALUES.length; i++) { |
| if (VALUES[i].name().equalsIgnoreCase(name)) { |
| return VALUES[i]; |
| } |
| } |
| } |
| |
| return null; |
| } |
| |
| void validate(Cache<Object, Object> cache, Exchange exchange) throws Exception { |
| } |
| |
| void execute(Cache<Object, Object> cache, Exchange exchange) { |
| } |
| |
| protected void headerIsNotNull(Exchange exchange, String... keys) throws Exception { |
| for (int i = keys.length - 1; i >= 0; i--) { |
| if (exchange.getIn().getHeader(keys[i]) == null) { |
| throw new IllegalArgumentException( |
| String.format("Header %s must be set for action %s", keys[i], name()) |
| ); |
| } |
| } |
| } |
| } |
| } |