Source code

001/**
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.apache.camel.spring.handler;
018
019import java.lang.reflect.Method;
020import java.util.HashMap;
021import java.util.HashSet;
022import java.util.Map;
023import java.util.Set;
024
025import javax.xml.bind.Binder;
026import javax.xml.bind.JAXBContext;
027import javax.xml.bind.JAXBException;
028
029import org.w3c.dom.Document;
030import org.w3c.dom.Element;
031import org.w3c.dom.NamedNodeMap;
032import org.w3c.dom.Node;
033import org.w3c.dom.NodeList;
034
035import org.apache.camel.builder.xml.Namespaces;
036import org.apache.camel.core.xml.CamelJMXAgentDefinition;
037import org.apache.camel.core.xml.CamelPropertyPlaceholderDefinition;
038import org.apache.camel.core.xml.CamelStreamCachingStrategyDefinition;
039import org.apache.camel.impl.DefaultCamelContextNameStrategy;
040import org.apache.camel.model.FromDefinition;
041import org.apache.camel.model.SendDefinition;
042import org.apache.camel.spi.CamelContextNameStrategy;
043import org.apache.camel.spi.NamespaceAware;
044import org.apache.camel.spring.CamelBeanPostProcessor;
045import org.apache.camel.spring.CamelConsumerTemplateFactoryBean;
046import org.apache.camel.spring.CamelContextFactoryBean;
047import org.apache.camel.spring.CamelEndpointFactoryBean;
048import org.apache.camel.spring.CamelProducerTemplateFactoryBean;
049import org.apache.camel.spring.CamelRedeliveryPolicyFactoryBean;
050import org.apache.camel.spring.CamelRestContextFactoryBean;
051import org.apache.camel.spring.CamelRouteContextFactoryBean;
052import org.apache.camel.spring.CamelThreadPoolFactoryBean;
053import org.apache.camel.spring.SpringModelJAXBContextFactory;
054import org.apache.camel.spring.remoting.CamelProxyFactoryBean;
055import org.apache.camel.spring.remoting.CamelServiceExporter;
056import org.apache.camel.util.ObjectHelper;
057import org.apache.camel.util.spring.KeyStoreParametersFactoryBean;
058import org.apache.camel.util.spring.SSLContextParametersFactoryBean;
059import org.apache.camel.util.spring.SecureRandomParametersFactoryBean;
060import org.apache.camel.view.ModelFileGenerator;
061import org.slf4j.Logger;
062import org.slf4j.LoggerFactory;
063import org.springframework.beans.factory.BeanCreationException;
064import org.springframework.beans.factory.BeanDefinitionStoreException;
065import org.springframework.beans.factory.config.BeanDefinition;
066import org.springframework.beans.factory.config.RuntimeBeanReference;
067import org.springframework.beans.factory.parsing.BeanComponentDefinition;
068import org.springframework.beans.factory.support.BeanDefinitionBuilder;
069import org.springframework.beans.factory.xml.NamespaceHandlerSupport;
070import org.springframework.beans.factory.xml.ParserContext;
071
072/**
073 * Camel namespace for the spring XML configuration file.
074 */
075public class CamelNamespaceHandler extends NamespaceHandlerSupport {
076    private static final String SPRING_NS = "http://camel.apache.org/schema/spring";
077    private static final Logger LOG = LoggerFactory.getLogger(CamelNamespaceHandler.class);
078    protected BeanDefinitionParser endpointParser = new EndpointDefinitionParser();
079    protected BeanDefinitionParser beanPostProcessorParser = new BeanDefinitionParser(CamelBeanPostProcessor.class, false);
080    protected Set<String> parserElementNames = new HashSet<String>();
081    protected Map<String, BeanDefinitionParser> parserMap = new HashMap<String, BeanDefinitionParser>();
082    
083    private JAXBContext jaxbContext;
084    private Map<String, BeanDefinition> autoRegisterMap = new HashMap<String, BeanDefinition>();
085
086    /**
087     * Prepares the nodes before parsing.
088     */
089    public static void doBeforeParse(Node node) {
090        if (node.getNodeType() == Node.ELEMENT_NODE) {
091
092            // ensure namespace with versions etc is renamed to be same namespace so we can parse using this handler
093            Document doc = node.getOwnerDocument();
094            if (node.getNamespaceURI().startsWith(SPRING_NS + "/v")) {
095                doc.renameNode(node, SPRING_NS, node.getNodeName());
096            }
097
098            // remove whitespace noise from uri, xxxUri attributes, eg new lines, and tabs etc, which allows end users to format
099            // their Camel routes in more human readable format, but at runtime those attributes must be trimmed
100            // the parser removes most of the noise, but keeps double spaces in the attribute values
101            NamedNodeMap map = node.getAttributes();
102            for (int i = 0; i < map.getLength(); i++) {
103                Node att = map.item(i);
104                if (att.getNodeName().equals("uri") || att.getNodeName().endsWith("Uri")) {
105
106                    String value = att.getNodeValue();
107                    // remove all double spaces
108                    String changed = value.replaceAll("\\s{2,}", "");
109
110                    if (!value.equals(changed)) {
111                        LOG.debug("Removed whitespace noise from attribute {} -> {}", value, changed);
112                        att.setNodeValue(changed);
113                    }
114                }
115            }
116        }
117        NodeList list = node.getChildNodes();
118        for (int i = 0; i < list.getLength(); ++i) {
119            doBeforeParse(list.item(i));
120        }
121    }
122
123    public ModelFileGenerator createModelFileGenerator() throws JAXBException {
124        return new ModelFileGenerator(getJaxbContext());
125    }
126
127    public void init() {
128        // register restContext parser
129        registerParser("restContext", new RestContextDefinitionParser());
130        // register routeContext parser
131        registerParser("routeContext", new RouteContextDefinitionParser());
132        // register endpoint parser
133        registerParser("endpoint", endpointParser);
134
135        addBeanDefinitionParser("keyStoreParameters", KeyStoreParametersFactoryBean.class, true, true);
136        addBeanDefinitionParser("secureRandomParameters", SecureRandomParametersFactoryBean.class, true, true);
137        registerBeanDefinitionParser("sslContextParameters", new SSLContextParametersFactoryBeanBeanDefinitionParser());
138
139        addBeanDefinitionParser("proxy", CamelProxyFactoryBean.class, true, false);
140        addBeanDefinitionParser("template", CamelProducerTemplateFactoryBean.class, true, false);
141        addBeanDefinitionParser("consumerTemplate", CamelConsumerTemplateFactoryBean.class, true, false);
142        addBeanDefinitionParser("export", CamelServiceExporter.class, true, false);
143        addBeanDefinitionParser("threadPool", CamelThreadPoolFactoryBean.class, true, true);
144        addBeanDefinitionParser("redeliveryPolicyProfile", CamelRedeliveryPolicyFactoryBean.class, true, true);
145
146        // jmx agent, stream caching, and property placeholder cannot be used outside of the camel context
147        addBeanDefinitionParser("jmxAgent", CamelJMXAgentDefinition.class, false, false);
148        addBeanDefinitionParser("streamCaching", CamelStreamCachingStrategyDefinition.class, false, false);
149        addBeanDefinitionParser("propertyPlaceholder", CamelPropertyPlaceholderDefinition.class, false, false);
150
151        // errorhandler could be the sub element of camelContext or defined outside camelContext
152        BeanDefinitionParser errorHandlerParser = new ErrorHandlerDefinitionParser();
153        registerParser("errorHandler", errorHandlerParser);
154        parserMap.put("errorHandler", errorHandlerParser);
155
156        // camel context
157        boolean osgi = false;
158        Class<?> cl = CamelContextFactoryBean.class;
159        // These code will try to detected if we are in the OSGi environment.
160        // If so, camel will use the OSGi version of CamelContextFactoryBean to create the CamelContext.
161        try {
162            // Try to load the BundleActivator first
163            Class.forName("org.osgi.framework.BundleActivator");
164            Class<?> c = Class.forName("org.apache.camel.osgi.Activator");
165            Method mth = c.getDeclaredMethod("getBundle");
166            Object bundle = mth.invoke(null);
167            if (bundle != null) {
168                cl = Class.forName("org.apache.camel.osgi.CamelContextFactoryBean");
169                osgi = true;
170            }
171        } catch (Throwable t) {
172            // not running with camel-core-osgi so we fallback to the regular factory bean
173            LOG.trace("Cannot find class so assuming not running in OSGi container: " + t.getMessage());
174        }
175        if (osgi) {
176            LOG.info("OSGi environment detected.");
177        } 
178        LOG.debug("Using {} as CamelContextBeanDefinitionParser", cl.getCanonicalName());
179        registerParser("camelContext", new CamelContextBeanDefinitionParser(cl));
180    }
181
182    protected void addBeanDefinitionParser(String elementName, Class<?> type, boolean register, boolean assignId) {
183        BeanDefinitionParser parser = new BeanDefinitionParser(type, assignId);
184        if (register) {
185            registerParser(elementName, parser);
186        }
187        parserMap.put(elementName, parser);
188    }
189
190    protected void registerParser(String name, org.springframework.beans.factory.xml.BeanDefinitionParser parser) {
191        parserElementNames.add(name);
192        registerBeanDefinitionParser(name, parser);
193    }
194
195    protected Object parseUsingJaxb(Element element, ParserContext parserContext, Binder<Node> binder) {
196        try {
197            return binder.unmarshal(element);
198        } catch (JAXBException e) {
199            throw new BeanDefinitionStoreException("Failed to parse JAXB element", e);
200        }
201    }
202
203    public JAXBContext getJaxbContext() throws JAXBException {
204        if (jaxbContext == null) {
205            jaxbContext = new SpringModelJAXBContextFactory().newJAXBContext();
206        }
207        return jaxbContext;
208    }
209    
210    protected class SSLContextParametersFactoryBeanBeanDefinitionParser extends BeanDefinitionParser {
211
212        public SSLContextParametersFactoryBeanBeanDefinitionParser() {
213            super(SSLContextParametersFactoryBean.class, true);
214        }
215
216        @Override
217        protected void doParse(Element element, ParserContext parserContext, BeanDefinitionBuilder builder) {
218            doBeforeParse(element);
219            super.doParse(element, builder);
220            
221            // Note: prefer to use doParse from parent and postProcess; however, parseUsingJaxb requires 
222            // parserContext for no apparent reason.
223            Binder<Node> binder;
224            try {
225                binder = getJaxbContext().createBinder();
226            } catch (JAXBException e) {
227                throw new BeanDefinitionStoreException("Failed to create the JAXB binder", e);
228            }
229            
230            Object value = parseUsingJaxb(element, parserContext, binder);
231            
232            if (value instanceof SSLContextParametersFactoryBean) {
233                SSLContextParametersFactoryBean bean = (SSLContextParametersFactoryBean)value;
234                
235                builder.addPropertyValue("cipherSuites", bean.getCipherSuites());
236                builder.addPropertyValue("cipherSuitesFilter", bean.getCipherSuitesFilter());
237                builder.addPropertyValue("secureSocketProtocols", bean.getSecureSocketProtocols());
238                builder.addPropertyValue("secureSocketProtocolsFilter", bean.getSecureSocketProtocolsFilter());
239                builder.addPropertyValue("keyManagers", bean.getKeyManagers());
240                builder.addPropertyValue("trustManagers", bean.getTrustManagers());
241                builder.addPropertyValue("secureRandom", bean.getSecureRandom());
242                
243                builder.addPropertyValue("clientParameters", bean.getClientParameters());
244                builder.addPropertyValue("serverParameters", bean.getServerParameters());
245            } else {
246                throw new BeanDefinitionStoreException("Parsed type is not of the expected type. Expected "
247                                                       + SSLContextParametersFactoryBean.class.getName() + " but found "
248                                                       + value.getClass().getName());
249            }
250        }
251    }
252
253    protected class RouteContextDefinitionParser extends BeanDefinitionParser {
254
255        public RouteContextDefinitionParser() {
256            super(CamelRouteContextFactoryBean.class, false);
257        }
258
259        @Override
260        protected void doParse(Element element, ParserContext parserContext, BeanDefinitionBuilder builder) {
261            doBeforeParse(element);
262            super.doParse(element, parserContext, builder);
263
264            // now lets parse the routes with JAXB
265            Binder<Node> binder;
266            try {
267                binder = getJaxbContext().createBinder();
268            } catch (JAXBException e) {
269                throw new BeanDefinitionStoreException("Failed to create the JAXB binder", e);
270            }
271            Object value = parseUsingJaxb(element, parserContext, binder);
272
273            if (value instanceof CamelRouteContextFactoryBean) {
274                CamelRouteContextFactoryBean factoryBean = (CamelRouteContextFactoryBean) value;
275                builder.addPropertyValue("routes", factoryBean.getRoutes());
276            }
277
278            // lets inject the namespaces into any namespace aware POJOs
279            injectNamespaces(element, binder);
280        }
281    }
282
283    protected class EndpointDefinitionParser extends BeanDefinitionParser {
284
285        public EndpointDefinitionParser() {
286            super(CamelEndpointFactoryBean.class, false);
287        }
288
289        @Override
290        protected void doParse(Element element, ParserContext parserContext, BeanDefinitionBuilder builder) {
291            doBeforeParse(element);
292            super.doParse(element, parserContext, builder);
293
294            // now lets parse the routes with JAXB
295            Binder<Node> binder;
296            try {
297                binder = getJaxbContext().createBinder();
298            } catch (JAXBException e) {
299                throw new BeanDefinitionStoreException("Failed to create the JAXB binder", e);
300            }
301            Object value = parseUsingJaxb(element, parserContext, binder);
302
303            if (value instanceof CamelEndpointFactoryBean) {
304                CamelEndpointFactoryBean factoryBean = (CamelEndpointFactoryBean) value;
305                builder.addPropertyValue("properties", factoryBean.getProperties());
306            }
307        }
308    }
309
310    protected class RestContextDefinitionParser extends BeanDefinitionParser {
311
312        public RestContextDefinitionParser() {
313            super(CamelRestContextFactoryBean.class, false);
314        }
315
316        @Override
317        protected void doParse(Element element, ParserContext parserContext, BeanDefinitionBuilder builder) {
318            doBeforeParse(element);
319            super.doParse(element, parserContext, builder);
320
321            // now lets parse the routes with JAXB
322            Binder<Node> binder;
323            try {
324                binder = getJaxbContext().createBinder();
325            } catch (JAXBException e) {
326                throw new BeanDefinitionStoreException("Failed to create the JAXB binder", e);
327            }
328            Object value = parseUsingJaxb(element, parserContext, binder);
329
330            if (value instanceof CamelRestContextFactoryBean) {
331                CamelRestContextFactoryBean factoryBean = (CamelRestContextFactoryBean) value;
332                builder.addPropertyValue("rests", factoryBean.getRests());
333            }
334
335            // lets inject the namespaces into any namespace aware POJOs
336            injectNamespaces(element, binder);
337        }
338    }
339
340    protected class CamelContextBeanDefinitionParser extends BeanDefinitionParser {
341
342        public CamelContextBeanDefinitionParser(Class<?> type) {
343            super(type, false);
344        }
345
346        @Override
347        protected void doParse(Element element, ParserContext parserContext, BeanDefinitionBuilder builder) {
348            doBeforeParse(element);
349            super.doParse(element, parserContext, builder);
350
351            String contextId = element.getAttribute("id");
352            boolean implicitId = false;
353
354            // lets avoid folks having to explicitly give an ID to a camel context
355            if (ObjectHelper.isEmpty(contextId)) {
356                // if no explicit id was set then use a default auto generated name
357                CamelContextNameStrategy strategy = new DefaultCamelContextNameStrategy();
358                contextId = strategy.getName();
359                element.setAttributeNS(null, "id", contextId);
360                implicitId = true;
361            }
362
363            // now lets parse the routes with JAXB
364            Binder<Node> binder;
365            try {
366                binder = getJaxbContext().createBinder();
367            } catch (JAXBException e) {
368                throw new BeanDefinitionStoreException("Failed to create the JAXB binder", e);
369            }
370            Object value = parseUsingJaxb(element, parserContext, binder);
371
372            if (value instanceof CamelContextFactoryBean) {
373                // set the property value with the JAXB parsed value
374                CamelContextFactoryBean factoryBean = (CamelContextFactoryBean) value;
375                builder.addPropertyValue("id", contextId);
376                builder.addPropertyValue("implicitId", implicitId);
377                builder.addPropertyValue("restConfiguration", factoryBean.getRestConfiguration());
378                builder.addPropertyValue("rests", factoryBean.getRests());
379                builder.addPropertyValue("routes", factoryBean.getRoutes());
380                builder.addPropertyValue("intercepts", factoryBean.getIntercepts());
381                builder.addPropertyValue("interceptFroms", factoryBean.getInterceptFroms());
382                builder.addPropertyValue("interceptSendToEndpoints", factoryBean.getInterceptSendToEndpoints());
383                builder.addPropertyValue("dataFormats", factoryBean.getDataFormats());
384                builder.addPropertyValue("onCompletions", factoryBean.getOnCompletions());
385                builder.addPropertyValue("onExceptions", factoryBean.getOnExceptions());
386                builder.addPropertyValue("builderRefs", factoryBean.getBuilderRefs());
387                builder.addPropertyValue("routeRefs", factoryBean.getRouteRefs());
388                builder.addPropertyValue("restRefs", factoryBean.getRestRefs());
389                builder.addPropertyValue("properties", factoryBean.getProperties());
390                builder.addPropertyValue("packageScan", factoryBean.getPackageScan());
391                builder.addPropertyValue("contextScan", factoryBean.getContextScan());
392                if (factoryBean.getPackages().length > 0) {
393                    builder.addPropertyValue("packages", factoryBean.getPackages());
394                }
395                builder.addPropertyValue("camelPropertyPlaceholder", factoryBean.getCamelPropertyPlaceholder());
396                builder.addPropertyValue("camelJMXAgent", factoryBean.getCamelJMXAgent());
397                builder.addPropertyValue("camelStreamCachingStrategy", factoryBean.getCamelStreamCachingStrategy());
398                builder.addPropertyValue("threadPoolProfiles", factoryBean.getThreadPoolProfiles());
399                // add any depends-on
400                addDependsOn(factoryBean, builder);
401            }
402
403            NodeList list = element.getChildNodes();
404            int size = list.getLength();
405            for (int i = 0; i < size; i++) {
406                Node child = list.item(i);
407                if (child instanceof Element) {
408                    Element childElement = (Element) child;
409                    String localName = child.getLocalName();
410                    if (localName.equals("endpoint")) {
411                        registerEndpoint(childElement, parserContext, contextId);
412                    } else if (localName.equals("routeBuilder")) {
413                        addDependsOnToRouteBuilder(childElement, parserContext, contextId);
414                    } else {
415                        BeanDefinitionParser parser = parserMap.get(localName);
416                        if (parser != null) {
417                            BeanDefinition definition = parser.parse(childElement, parserContext);
418                            String id = childElement.getAttribute("id");
419                            if (ObjectHelper.isNotEmpty(id)) {
420                                parserContext.registerComponent(new BeanComponentDefinition(definition, id));
421                                // set the templates with the camel context
422                                if (localName.equals("template") || localName.equals("consumerTemplate")
423                                        || localName.equals("proxy") || localName.equals("export")) {
424                                    // set the camel context
425                                    definition.getPropertyValues().addPropertyValue("camelContext", new RuntimeBeanReference(contextId));
426                                }
427                            }
428                        }
429                    }
430                }
431            }
432
433            // register as endpoint defined indirectly in the routes by from/to types having id explicit set
434            registerEndpointsWithIdsDefinedInFromOrToTypes(element, parserContext, contextId, binder);
435
436            // register templates if not already defined
437            registerTemplates(element, parserContext, contextId);
438
439            // lets inject the namespaces into any namespace aware POJOs
440            injectNamespaces(element, binder);
441
442            // inject bean post processor so we can support @Produce etc.
443            // no bean processor element so lets create it by our self
444            injectBeanPostProcessor(element, parserContext, contextId, builder);
445        }
446    }
447
448    protected void addDependsOn(CamelContextFactoryBean factoryBean, BeanDefinitionBuilder builder) {
449        String dependsOn = factoryBean.getDependsOn();
450        if (ObjectHelper.isNotEmpty(dependsOn)) {
451            // comma, whitespace and semi colon is valid separators in Spring depends-on
452            String[] depends = dependsOn.split(",|;|\\s");
453            if (depends == null) {
454                throw new IllegalArgumentException("Cannot separate depends-on, was: " + dependsOn);
455            } else {
456                for (String depend : depends) {
457                    depend = depend.trim();
458                    LOG.debug("Adding dependsOn {} to CamelContext({})", depend, factoryBean.getId());
459                    builder.addDependsOn(depend);
460                }
461            }
462        }
463    }
464
465    private void addDependsOnToRouteBuilder(Element childElement, ParserContext parserContext, String contextId) {
466        // setting the depends-on explicitly is required since Spring 3.0
467        String routeBuilderName = childElement.getAttribute("ref");
468        if (ObjectHelper.isNotEmpty(routeBuilderName)) {
469            // set depends-on to the context for a routeBuilder bean
470            try {
471                BeanDefinition definition = parserContext.getRegistry().getBeanDefinition(routeBuilderName);
472                Method getDependsOn = definition.getClass().getMethod("getDependsOn", new Class[]{});
473                String[] dependsOn = (String[])getDependsOn.invoke(definition);
474                if (dependsOn == null || dependsOn.length == 0) {
475                    dependsOn = new String[]{contextId};
476                } else {
477                    String[] temp = new String[dependsOn.length + 1];
478                    System.arraycopy(dependsOn, 0, temp, 0, dependsOn.length);
479                    temp[dependsOn.length] = contextId;
480                    dependsOn = temp;
481                }
482                Method method = definition.getClass().getMethod("setDependsOn", String[].class);
483                method.invoke(definition, (Object)dependsOn);
484            } catch (Exception e) {
485                // Do nothing here
486            }
487        }
488    }
489
490    protected void injectNamespaces(Element element, Binder<Node> binder) {
491        NodeList list = element.getChildNodes();
492        Namespaces namespaces = null;
493        int size = list.getLength();
494        for (int i = 0; i < size; i++) {
495            Node child = list.item(i);
496            if (child instanceof Element) {
497                Element childElement = (Element) child;
498                Object object = binder.getJAXBNode(child);
499                if (object instanceof NamespaceAware) {
500                    NamespaceAware namespaceAware = (NamespaceAware) object;
501                    if (namespaces == null) {
502                        namespaces = new Namespaces(element);
503                    }
504                    namespaces.configure(namespaceAware);
505                }
506                injectNamespaces(childElement, binder);
507            }
508        }
509    }
510
511    protected void injectBeanPostProcessor(Element element, ParserContext parserContext, String contextId, BeanDefinitionBuilder builder) {
512        Element childElement = element.getOwnerDocument().createElement("beanPostProcessor");
513        element.appendChild(childElement);
514
515        String beanPostProcessorId = contextId + ":beanPostProcessor";
516        childElement.setAttribute("id", beanPostProcessorId);
517        BeanDefinition definition = beanPostProcessorParser.parse(childElement, parserContext);
518        // only register to camel context id as a String. Then we can look it up later
519        // otherwise we get a circular reference in spring and it will not allow custom bean post processing
520        // see more at CAMEL-1663
521        definition.getPropertyValues().addPropertyValue("camelId", contextId);
522        builder.addPropertyReference("beanPostProcessor", beanPostProcessorId);
523    }
524
525    /**
526     * Used for auto registering endpoints from the <tt>from</tt> or <tt>to</tt> DSL if they have an id attribute set
527     */
528    protected void registerEndpointsWithIdsDefinedInFromOrToTypes(Element element, ParserContext parserContext, String contextId, Binder<Node> binder) {
529        NodeList list = element.getChildNodes();
530        int size = list.getLength();
531        for (int i = 0; i < size; i++) {
532            Node child = list.item(i);
533            if (child instanceof Element) {
534                Element childElement = (Element) child;
535                Object object = binder.getJAXBNode(child);
536                // we only want from/to types to be registered as endpoints
537                if (object instanceof FromDefinition || object instanceof SendDefinition) {
538                    registerEndpoint(childElement, parserContext, contextId);
539                }
540                // recursive
541                registerEndpointsWithIdsDefinedInFromOrToTypes(childElement, parserContext, contextId, binder);
542            }
543        }
544    }
545
546    /**
547     * Used for auto registering producer and consumer templates if not already defined in XML.
548     */
549    protected void registerTemplates(Element element, ParserContext parserContext, String contextId) {
550        boolean template = false;
551        boolean consumerTemplate = false;
552
553        NodeList list = element.getChildNodes();
554        int size = list.getLength();
555        for (int i = 0; i < size; i++) {
556            Node child = list.item(i);
557            if (child instanceof Element) {
558                Element childElement = (Element) child;
559                String localName = childElement.getLocalName();
560                if ("template".equals(localName)) {
561                    template = true;
562                } else if ("consumerTemplate".equals(localName)) {
563                    consumerTemplate = true;
564                }
565            }
566        }
567
568        if (!template) {
569            // either we have not used template before or we have auto registered it already and therefore we
570            // need it to allow to do it so it can remove the existing auto registered as there is now a clash id
571            // since we have multiple camel contexts
572            boolean existing = autoRegisterMap.get("template") != null;
573            boolean inUse = false;
574            try {
575                inUse = parserContext.getRegistry().isBeanNameInUse("template");
576            } catch (BeanCreationException e) {
577                // Spring Eclipse Tooling may throw an exception when you edit the Spring XML online in Eclipse
578                // when the isBeanNameInUse method is invoked, so ignore this and continue (CAMEL-2739)
579                LOG.debug("Error checking isBeanNameInUse(template). This exception will be ignored", e);
580            }
581            if (!inUse || existing) {
582                String id = "template";
583                // auto create a template
584                Element templateElement = element.getOwnerDocument().createElement("template");
585                templateElement.setAttribute("id", id);
586                BeanDefinitionParser parser = parserMap.get("template");
587                BeanDefinition definition = parser.parse(templateElement, parserContext);
588
589                // auto register it
590                autoRegisterBeanDefinition(id, definition, parserContext, contextId);
591            }
592        }
593
594        if (!consumerTemplate) {
595            // either we have not used template before or we have auto registered it already and therefore we
596            // need it to allow to do it so it can remove the existing auto registered as there is now a clash id
597            // since we have multiple camel contexts
598            boolean existing = autoRegisterMap.get("consumerTemplate") != null;
599            boolean inUse = false;
600            try {
601                inUse = parserContext.getRegistry().isBeanNameInUse("consumerTemplate");
602            } catch (BeanCreationException e) {
603                // Spring Eclipse Tooling may throw an exception when you edit the Spring XML online in Eclipse
604                // when the isBeanNameInUse method is invoked, so ignore this and continue (CAMEL-2739)
605                LOG.debug("Error checking isBeanNameInUse(consumerTemplate). This exception will be ignored", e);
606            }
607            if (!inUse || existing) {
608                String id = "consumerTemplate";
609                // auto create a template
610                Element templateElement = element.getOwnerDocument().createElement("consumerTemplate");
611                templateElement.setAttribute("id", id);
612                BeanDefinitionParser parser = parserMap.get("consumerTemplate");
613                BeanDefinition definition = parser.parse(templateElement, parserContext);
614
615                // auto register it
616                autoRegisterBeanDefinition(id, definition, parserContext, contextId);
617            }
618        }
619
620    }
621
622    private void autoRegisterBeanDefinition(String id, BeanDefinition definition, ParserContext parserContext, String contextId) {
623        // it is a bit cumbersome to work with the spring bean definition parser
624        // as we kinda need to eagerly register the bean definition on the parser context
625        // and then later we might find out that we should not have done that in case we have multiple camel contexts
626        // that would have a id clash by auto registering the same bean definition with the same id such as a producer template
627
628        // see if we have already auto registered this id
629        BeanDefinition existing = autoRegisterMap.get(id);
630        if (existing == null) {
631            // no then add it to the map and register it
632            autoRegisterMap.put(id, definition);
633            parserContext.registerComponent(new BeanComponentDefinition(definition, id));
634            if (LOG.isDebugEnabled()) {
635                LOG.debug("Registered default: {} with id: {} on camel context: {}", new Object[]{definition.getBeanClassName(), id, contextId});
636            }
637        } else {
638            // ups we have already registered it before with same id, but on another camel context
639            // this is not good so we need to remove all traces of this auto registering.
640            // end user must manually add the needed XML elements and provide unique ids access all camel context himself.
641            LOG.debug("Unregistered default: {} with id: {} as we have multiple camel contexts and they must use unique ids."
642                    + " You must define the definition in the XML file manually to avoid id clashes when using multiple camel contexts",
643                    definition.getBeanClassName(), id);
644
645            parserContext.getRegistry().removeBeanDefinition(id);
646        }
647    }
648
649    private void registerEndpoint(Element childElement, ParserContext parserContext, String contextId) {
650        String id = childElement.getAttribute("id");
651        // must have an id to be registered
652        if (ObjectHelper.isNotEmpty(id)) {
653            BeanDefinition definition = endpointParser.parse(childElement, parserContext);
654            definition.getPropertyValues().addPropertyValue("camelContext", new RuntimeBeanReference(contextId));
655            // Need to add this dependency of CamelContext for Spring 3.0
656            try {
657                Method method = definition.getClass().getMethod("setDependsOn", String[].class);
658                method.invoke(definition, (Object) new String[]{contextId});
659            } catch (Exception e) {
660                // Do nothing here
661            }
662            parserContext.registerBeanComponent(new BeanComponentDefinition(definition, id));
663        }
664    }
665
666}