| /* |
| * 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.synapse.config.xml; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.synapse.SynapseException; |
| import org.apache.synapse.Mediator; |
| import org.apache.synapse.config.xml.eventing.EventPublisherMediatorSerializer; |
| import org.apache.synapse.mediators.builtin.RespondMediator; |
| import sun.misc.Service; |
| |
| import java.util.HashMap; |
| import java.util.Iterator; |
| import java.util.Map; |
| |
| public class MediatorSerializerFinder { |
| |
| private static final Log log = LogFactory.getLog(MediatorSerializerFinder.class); |
| |
| private static final Class[] mediatorSerializers = { |
| SequenceMediatorSerializer.class, |
| LogMediatorSerializer.class, |
| SendMediatorSerializer.class, |
| FilterMediatorSerializer.class, |
| SynapseMediatorSerializer.class, |
| DropMediatorSerializer.class, |
| HeaderMediatorSerializer.class, |
| FaultMediatorSerializer.class, |
| PropertyMediatorSerializer.class, |
| SwitchMediatorSerializer.class, |
| InMediatorSerializer.class, |
| OutMediatorSerializer.class, |
| ClassMediatorSerializer.class, |
| ValidateMediatorSerializer.class, |
| XSLTMediatorSerializer.class, |
| POJOCommandMediatorSerializer.class, |
| CloneMediatorSerializer.class, |
| IterateMediatorSerializer.class, |
| AggregateMediatorSerializer.class, |
| DBLookupMediatorSerializer.class, |
| DBReportMediatorSerializer.class, |
| CacheMediatorSerializer.class, |
| CalloutMediatorSerializer.class, |
| EventPublisherMediatorSerializer.class, |
| TransactionMediatorSerializer.class, |
| EnqueueMediatorSerializer.class, |
| ConditionalRouterMediatorSerializer.class, |
| SamplingThrottleMediatorSerializer.class, |
| EnrichMediatorSerializer.class, |
| TemplateMediatorSerializer.class, |
| InvokeMediatorSerializer.class, |
| MessageStoreMediatorSerializer.class, |
| URLRewriteMediatorSerializer.class, |
| PayloadFactoryMediatorSerializer.class, |
| BeanMediatorSerializer.class, |
| EJBMediatorSerializer.class, |
| RespondMediatorSerializer.class |
| }; |
| |
| private final static MediatorSerializerFinder instance = new MediatorSerializerFinder(); |
| |
| /** |
| * A map of mediator QNames to implementation class |
| */ |
| private final Map<String, MediatorSerializer> serializerMap |
| = new HashMap<String, MediatorSerializer>(); |
| |
| public static synchronized MediatorSerializerFinder getInstance() { |
| return instance; |
| } |
| |
| public MediatorSerializer getSerializer(Mediator mediator) { |
| return serializerMap.get(mediator.getClass().getName()); |
| } |
| |
| private MediatorSerializerFinder() { |
| for (Class c : mediatorSerializers) { |
| try { |
| MediatorSerializer ser = (MediatorSerializer) c.newInstance(); |
| serializerMap.put(ser.getMediatorClassName(), ser); |
| } catch (Exception e) { |
| throw new SynapseException("Error instantiating " + c.getName(), e); |
| } |
| } |
| // now iterate through the available pluggable mediator factories |
| registerExtensions(); |
| } |
| |
| /** |
| * Register pluggable mediator serializers from the classpath |
| * |
| * This looks for JAR files containing a META-INF/services that adheres to the following |
| * http://java.sun.com/j2se/1.3/docs/guide/jar/jar.html#Service%20Provider |
| */ |
| private void registerExtensions() { |
| if (log.isDebugEnabled()) { |
| log.debug("Registering mediator extensions found in the classpath.. "); |
| } |
| // register MediatorSerializer extensions |
| Iterator it = Service.providers(MediatorSerializer.class); |
| while (it.hasNext()) { |
| MediatorSerializer ms = (MediatorSerializer) it.next(); |
| String name = ms.getMediatorClassName(); |
| try { |
| serializerMap.put(name, ms.getClass().newInstance()); |
| } catch (InstantiationException e) { |
| handleException("Error instantiating mediator serializer : " + ms); |
| } catch (IllegalAccessException e) { |
| handleException("Error instantiating mediator serializer : " + ms); |
| } |
| if (log.isDebugEnabled()) { |
| log.debug("Added MediatorSerializer " + ms.getClass().getName() + " to handle " + name); |
| } |
| } |
| } |
| |
| /** |
| * This method will return the serializer Map registered with the Finder |
| * |
| * @return Map of serializers already registered with the Finder |
| */ |
| public Map<String, MediatorSerializer> getSerializerMap() { |
| return serializerMap; |
| } |
| |
| private static void handleException(String msg) { |
| log.error(msg); |
| throw new SynapseException(msg); |
| } |
| } |