| /** |
| * 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.cxf.jaxrs; |
| |
| import java.lang.reflect.Method; |
| |
| import javax.ws.rs.WebApplicationException; |
| import javax.ws.rs.core.Response; |
| |
| import org.apache.camel.AsyncCallback; |
| import org.apache.camel.ExchangePattern; |
| import org.apache.camel.RuntimeCamelException; |
| import org.apache.cxf.continuations.Continuation; |
| import org.apache.cxf.continuations.ContinuationProvider; |
| import org.apache.cxf.jaxrs.JAXRSInvoker; |
| import org.apache.cxf.jaxrs.model.OperationResourceInfo; |
| import org.apache.cxf.message.Exchange; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| public class CxfRsInvoker extends JAXRSInvoker { |
| private static final Logger LOG = LoggerFactory.getLogger(CxfRsInvoker.class); |
| private static final String SUSPENED = "org.apache.camel.component.cxf.jaxrs.suspend"; |
| private CxfRsConsumer cxfRsConsumer; |
| private CxfRsEndpoint endpoint; |
| |
| public CxfRsInvoker(CxfRsEndpoint endpoint, CxfRsConsumer consumer) { |
| this.endpoint = endpoint; |
| this.cxfRsConsumer = consumer; |
| } |
| |
| protected Object performInvocation(Exchange cxfExchange, final Object serviceObject, Method method, |
| Object[] paramArray) throws Exception { |
| paramArray = insertExchange(method, paramArray, cxfExchange); |
| OperationResourceInfo ori = cxfExchange.get(OperationResourceInfo.class); |
| if (ori.isSubResourceLocator()) { |
| // don't delegate the sub resource locator call to camel processor |
| return method.invoke(serviceObject, paramArray); |
| } |
| Continuation continuation; |
| if (!endpoint.isSynchronous() && (continuation = getContinuation(cxfExchange)) != null) { |
| LOG.trace("Calling the Camel async processors."); |
| return asyncInvoke(cxfExchange, serviceObject, method, paramArray, continuation); |
| } else { |
| LOG.trace("Calling the Camel sync processors."); |
| return syncInvoke(cxfExchange, serviceObject, method, paramArray); |
| } |
| } |
| |
| private Continuation getContinuation(Exchange cxfExchange) { |
| ContinuationProvider provider = |
| (ContinuationProvider)cxfExchange.getInMessage().get(ContinuationProvider.class.getName()); |
| return provider == null ? null : provider.getContinuation(); |
| } |
| |
| private Object asyncInvoke(Exchange cxfExchange, final Object serviceObject, Method method, |
| Object[] paramArray, final Continuation continuation) throws Exception { |
| synchronized (continuation) { |
| if (continuation.isNew()) { |
| ExchangePattern ep = ExchangePattern.InOut; |
| if (method.getReturnType() == Void.class) { |
| ep = ExchangePattern.InOnly; |
| } |
| final org.apache.camel.Exchange camelExchange = endpoint.createExchange(ep); |
| CxfRsBinding binding = endpoint.getBinding(); |
| binding.populateExchangeFromCxfRsRequest(cxfExchange, camelExchange, method, paramArray); |
| // Now we don't set up the timeout value |
| LOG.trace("Suspending continuation of exchangeId: {}", camelExchange.getExchangeId()); |
| // TODO Support to set the timeout in case the Camel can't send the response back on time. |
| // The continuation could be called before the suspend is called |
| continuation.suspend(0); |
| cxfExchange.put(SUSPENED, Boolean.TRUE); |
| cxfRsConsumer.getAsyncProcessor().process(camelExchange, new AsyncCallback() { |
| public void done(boolean doneSync) { |
| // make sure the continuation resume will not be called before the suspend method in other thread |
| synchronized (continuation) { |
| LOG.trace("Resuming continuation of exchangeId: {}", camelExchange.getExchangeId()); |
| // resume processing after both, sync and async callbacks |
| continuation.setObject(camelExchange); |
| continuation.resume(); |
| } |
| } |
| }); |
| return null; |
| } |
| if (continuation.isResumed()) { |
| cxfExchange.put(SUSPENED, Boolean.FALSE); |
| org.apache.camel.Exchange camelExchange = (org.apache.camel.Exchange)continuation |
| .getObject(); |
| return returnResponse(cxfExchange, camelExchange); |
| } |
| } |
| return null; |
| } |
| |
| private Object syncInvoke(Exchange cxfExchange, final Object serviceObject, Method method, |
| Object[] paramArray) throws Exception { |
| ExchangePattern ep = ExchangePattern.InOut; |
| |
| if (method.getReturnType() == Void.class) { |
| ep = ExchangePattern.InOnly; |
| } |
| org.apache.camel.Exchange camelExchange = endpoint.createExchange(ep); |
| CxfRsBinding binding = endpoint.getBinding(); |
| binding.populateExchangeFromCxfRsRequest(cxfExchange, camelExchange, method, paramArray); |
| |
| try { |
| cxfRsConsumer.getProcessor().process(camelExchange); |
| } catch (Exception exception) { |
| camelExchange.setException(exception); |
| } |
| return returnResponse(cxfExchange, camelExchange); |
| |
| } |
| |
| private Object returnResponse(Exchange cxfExchange, org.apache.camel.Exchange camelExchange) throws Exception { |
| if (camelExchange.getException() != null) { |
| Throwable exception = camelExchange.getException(); |
| Object result = null; |
| if (exception instanceof RuntimeCamelException) { |
| // Unwrap the RuntimeCamelException |
| if (exception.getCause() != null) { |
| exception = exception.getCause(); |
| } |
| } |
| if (exception instanceof WebApplicationException) { |
| result = ((WebApplicationException)exception).getResponse(); |
| if (result != null) { |
| return result; |
| } else { |
| throw (WebApplicationException)exception; |
| } |
| } else { |
| // Send the exception message back |
| WebApplicationException webApplicationException = new WebApplicationException(exception, Response.serverError().entity(exception.toString()).build()); |
| throw webApplicationException; |
| } |
| |
| } |
| return endpoint.getBinding().populateCxfRsResponseFromExchange(camelExchange, cxfExchange); |
| } |
| |
| } |