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package org.apache.camel.spring; |
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import org.apache.camel.Endpoint; |
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import org.apache.camel.Processor; |
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import org.apache.camel.RuntimeCamelException; |
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import org.apache.camel.component.bean.BeanProcessor; |
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import org.apache.camel.component.event.EventComponent; |
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import org.apache.camel.component.event.EventEndpoint; |
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import org.apache.camel.impl.DefaultCamelContext; |
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import org.apache.camel.impl.ProcessorEndpoint; |
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import org.apache.camel.spi.ComponentResolver; |
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import org.apache.camel.spi.Injector; |
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import org.apache.camel.spi.Registry; |
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import org.apache.camel.spring.spi.ApplicationContextRegistry; |
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import org.apache.camel.spring.spi.SpringComponentResolver; |
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import org.apache.camel.spring.spi.SpringInjector; |
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import org.apache.commons.logging.Log; |
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import org.apache.commons.logging.LogFactory; |
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import org.springframework.beans.BeansException; |
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import org.springframework.beans.factory.DisposableBean; |
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import org.springframework.beans.factory.InitializingBean; |
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import org.springframework.context.ApplicationContext; |
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import org.springframework.context.ApplicationContextAware; |
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import org.springframework.context.ApplicationEvent; |
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import org.springframework.context.ApplicationListener; |
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import org.springframework.context.ConfigurableApplicationContext; |
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import org.springframework.context.event.ContextRefreshedEvent; |
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import org.springframework.context.support.AbstractRefreshableApplicationContext; |
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import org.springframework.context.support.ClassPathXmlApplicationContext; |
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public class SpringCamelContext extends DefaultCamelContext implements InitializingBean, DisposableBean, ApplicationContextAware, ApplicationListener { |
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private static final transient Log LOG = LogFactory.getLog(SpringCamelContext.class); |
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private ApplicationContext applicationContext; |
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private EventEndpoint eventEndpoint; |
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public SpringCamelContext() { |
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} |
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public SpringCamelContext(ApplicationContext applicationContext) { |
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setApplicationContext(applicationContext); |
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} |
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public static SpringCamelContext springCamelContext(ApplicationContext applicationContext) throws Exception { |
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String[] names = applicationContext.getBeanNamesForType(SpringCamelContext.class); |
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if (names.length == 1) { |
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return (SpringCamelContext)applicationContext.getBean(names[0], SpringCamelContext.class); |
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} |
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SpringCamelContext answer = new SpringCamelContext(); |
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answer.setApplicationContext(applicationContext); |
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answer.afterPropertiesSet(); |
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return answer; |
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} |
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public static SpringCamelContext springCamelContext(String configLocations) throws Exception { |
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return springCamelContext(new ClassPathXmlApplicationContext(configLocations)); |
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} |
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public void afterPropertiesSet() throws Exception { |
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start(); |
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} |
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public void destroy() throws Exception { |
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stop(); |
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} |
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public void onApplicationEvent(ApplicationEvent event) { |
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if (LOG.isDebugEnabled()) { |
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LOG.debug("Publishing event: " + event); |
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} |
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if (event instanceof ContextRefreshedEvent) { |
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try { |
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LOG.debug("Starting the CamelContext now that the ApplicationContext has started"); |
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start(); |
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} catch (Exception e) { |
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throw new RuntimeCamelException(e); |
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} |
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if (eventEndpoint != null) { |
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eventEndpoint.onApplicationEvent(event); |
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} |
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} else { |
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if (eventEndpoint != null) { |
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eventEndpoint.onApplicationEvent(event); |
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} else { |
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LOG.warn("No eventEndpoint enabled for event: " + event); |
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} |
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} |
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} |
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public ApplicationContext getApplicationContext() { |
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return applicationContext; |
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} |
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public void setApplicationContext(ApplicationContext applicationContext) throws BeansException { |
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this.applicationContext = applicationContext; |
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if (applicationContext instanceof ConfigurableApplicationContext) { |
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addComponent("event", new EventComponent(applicationContext)); |
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} |
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} |
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public EventEndpoint getEventEndpoint() { |
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return eventEndpoint; |
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} |
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public void setEventEndpoint(EventEndpoint eventEndpoint) { |
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this.eventEndpoint = eventEndpoint; |
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} |
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@Override |
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protected void doStart() throws Exception { |
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super.doStart(); |
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if (eventEndpoint == null) { |
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eventEndpoint = createEventEndpoint(); |
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} |
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} |
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@Override |
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protected Injector createInjector() { |
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return new SpringInjector((AbstractRefreshableApplicationContext)getApplicationContext()); |
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} |
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@Override |
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protected ComponentResolver createComponentResolver() { |
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ComponentResolver defaultResolver = super.createComponentResolver(); |
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return new SpringComponentResolver(getApplicationContext(), defaultResolver); |
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} |
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protected EventEndpoint createEventEndpoint() { |
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EventEndpoint endpoint = getEndpoint("event:default", EventEndpoint.class); |
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return endpoint; |
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} |
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protected Endpoint convertBeanToEndpoint(String uri, Object bean) { |
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Processor processor = new BeanProcessor(bean, this); |
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return new ProcessorEndpoint(uri, this, processor); |
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} |
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@Override |
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protected Registry createRegistry() { |
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return new ApplicationContextRegistry(getApplicationContext()); |
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} |
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} |