| /** |
| * 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.directvm; |
| |
| import org.apache.camel.AsyncCallback; |
| import org.apache.camel.Exchange; |
| import org.apache.camel.Processor; |
| import org.apache.camel.processor.DelegateAsyncProcessor; |
| import org.apache.camel.util.ExchangeHelper; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * |
| */ |
| public final class DirectVmProcessor extends DelegateAsyncProcessor { |
| |
| private static final transient Logger LOG = LoggerFactory.getLogger(DirectVmProcessor.class); |
| private final DirectVmEndpoint endpoint; |
| |
| public DirectVmProcessor(Processor processor, DirectVmEndpoint endpoint) { |
| super(processor); |
| this.endpoint = endpoint; |
| } |
| |
| @Override |
| public boolean process(final Exchange exchange, final AsyncCallback callback) { |
| // need to use a copy of the incoming exchange, so we route using this camel context |
| final Exchange copy = prepareExchange(exchange); |
| |
| ClassLoader current = Thread.currentThread().getContextClassLoader(); |
| boolean changed = false; |
| try { |
| // set TCCL to application context class loader if given |
| ClassLoader appClassLoader = endpoint.getCamelContext().getApplicationContextClassLoader(); |
| if (appClassLoader != null) { |
| LOG.trace("Setting Thread ContextClassLoader to {}", appClassLoader); |
| Thread.currentThread().setContextClassLoader(appClassLoader); |
| changed = true; |
| } |
| return getProcessor().process(copy, new AsyncCallback() { |
| @Override |
| public void done(boolean done) { |
| try { |
| // make sure to copy results back |
| ExchangeHelper.copyResults(exchange, copy); |
| } finally { |
| // must call callback when we are done |
| callback.done(done); |
| } |
| } |
| }); |
| } finally { |
| // restore TCCL if it was changed during processing |
| if (changed) { |
| LOG.trace("Restoring Thread ContextClassLoader to {}", current); |
| Thread.currentThread().setContextClassLoader(current); |
| } |
| } |
| } |
| |
| /** |
| * Strategy to prepare exchange for being processed by this consumer |
| * |
| * @param exchange the exchange |
| * @return the exchange to process by this consumer. |
| */ |
| protected Exchange prepareExchange(Exchange exchange) { |
| // send a new copied exchange with new camel context (do not handover completions) |
| Exchange newExchange = ExchangeHelper.copyExchangeAndSetCamelContext(exchange, endpoint.getCamelContext(), false); |
| // set the from endpoint |
| newExchange.setFromEndpoint(endpoint); |
| return newExchange; |
| } |
| |
| @Override |
| public String toString() { |
| return "DirectVm[" + processor + "]"; |
| } |
| } |