import org.springframework.jmx.support.RegistrationPolicy; //导入依赖的package包/类
@Override
protected AbstractBeanDefinition parseInternal(Element element, ParserContext parserContext) {
	BeanDefinitionBuilder builder = BeanDefinitionBuilder.rootBeanDefinition(AnnotationMBeanExporter.class);

	// Mark as infrastructure bean and attach source location.
	builder.setRole(BeanDefinition.ROLE_INFRASTRUCTURE);
	builder.getRawBeanDefinition().setSource(parserContext.extractSource(element));

	String defaultDomain = element.getAttribute(DEFAULT_DOMAIN_ATTRIBUTE);
	if (StringUtils.hasText(defaultDomain)) {
		builder.addPropertyValue("defaultDomain", defaultDomain);
	}

	String serverBeanName = element.getAttribute(SERVER_ATTRIBUTE);
	if (StringUtils.hasText(serverBeanName)) {
		builder.addPropertyReference("server", serverBeanName);
	}
	else {
		AbstractBeanDefinition specialServer = MBeanServerBeanDefinitionParser.findServerForSpecialEnvironment();
		if (specialServer != null) {
			builder.addPropertyValue("server", specialServer);
		}
	}

	String registration = element.getAttribute(REGISTRATION_ATTRIBUTE);
	RegistrationPolicy registrationPolicy = RegistrationPolicy.FAIL_ON_EXISTING;
	if (REGISTRATION_IGNORE_EXISTING.equals(registration)) {
		registrationPolicy = RegistrationPolicy.IGNORE_EXISTING;
	}
	else if (REGISTRATION_REPLACE_EXISTING.equals(registration)) {
		registrationPolicy = RegistrationPolicy.REPLACE_EXISTING;
	}
	builder.addPropertyValue("registrationPolicy", registrationPolicy);

	return builder.getBeanDefinition();
}
 

import org.springframework.jmx.support.RegistrationPolicy; //导入依赖的package包/类
@Test
public void testRegisterReplaceExisting() throws Exception {
	ObjectName objectName = ObjectNameManager.getInstance(OBJECT_NAME);

	Person preRegistered = new Person();
	preRegistered.setName("Rob Harrop");

	server.registerMBean(preRegistered, objectName);

	Person springRegistered = new Person();
	springRegistered.setName("Sally Greenwood");

	Map<String, Object> beans = new HashMap<String, Object>();
	beans.put(objectName.toString(), springRegistered);

	MBeanExporter exporter = new MBeanExporter();
	exporter.setServer(server);
	exporter.setBeans(beans);
	exporter.setRegistrationPolicy(RegistrationPolicy.REPLACE_EXISTING);

	start(exporter);

	ObjectInstance instance = server.getObjectInstance(objectName);
	assertNotNull(instance);

	// should still be the new bean with name Sally Greenwood
	assertEquals("Sally Greenwood", server.getAttribute(objectName, "Name"));
}
 

import org.springframework.jmx.support.RegistrationPolicy; //导入依赖的package包/类
@Bean
@Primary
@ConditionalOnMissingBean(value = MBeanExporter.class, search = SearchStrategy.CURRENT)
public AnnotationMBeanExporter mbeanExporter(ObjectNamingStrategy namingStrategy) {
	AnnotationMBeanExporter exporter = new AnnotationMBeanExporter();
	exporter.setRegistrationPolicy(RegistrationPolicy.FAIL_ON_EXISTING);
	exporter.setNamingStrategy(namingStrategy);
	String server = this.propertyResolver.getProperty("server", "mbeanServer");
	if (StringUtils.hasLength(server)) {
		exporter.setServer(this.beanFactory.getBean(server, MBeanServer.class));
	}
	return exporter;
}
 

import org.springframework.jmx.support.RegistrationPolicy; //导入依赖的package包/类
/**
 * Special MBeanExporter bean for integration tests.
 *
 * @return MBeanExporter with a different registration strategy
 */
@Bean
@Profile("itest")
public MBeanExporter mbeanExporter() {
    MBeanExporter exporter = new MBeanExporter();
    exporter.setRegistrationPolicy(RegistrationPolicy.REPLACE_EXISTING);

    return exporter;
}
 

import org.springframework.jmx.support.RegistrationPolicy; //导入依赖的package包/类
@Test
public void testRegisterReplaceExisting() throws Exception {
	ObjectName objectName = ObjectNameManager.getInstance(OBJECT_NAME);

	Person preRegistered = new Person();
	preRegistered.setName("Rob Harrop");

	server.registerMBean(preRegistered, objectName);

	Person springRegistered = new Person();
	springRegistered.setName("Sally Greenwood");

	Map<String, Object> beans = new HashMap<String, Object>();
	beans.put(objectName.toString(), springRegistered);

	MBeanExporter exporter = new MBeanExporter();
	exporter.setServer(server);
	exporter.setBeans(beans);
	exporter.setRegistrationPolicy(RegistrationPolicy.REPLACE_EXISTING);

	exporter.afterPropertiesSet();

	ObjectInstance instance = server.getObjectInstance(objectName);
	assertNotNull(instance);

	// should still be the new bean with name Sally Greenwood
	assertEquals("Sally Greenwood", server.getAttribute(objectName, "Name"));
}
 

import org.springframework.jmx.support.RegistrationPolicy; //导入依赖的package包/类
private void setupRegistrationPolicy(AnnotationMBeanExporter exporter) {
	RegistrationPolicy registrationPolicy = this.attributes.getEnum("registration");
	exporter.setRegistrationPolicy(registrationPolicy);
}
 

import org.springframework.jmx.support.RegistrationPolicy; //导入依赖的package包/类
private void setupRegistrationPolicy(AnnotationMBeanExporter exporter) {
	RegistrationPolicy registrationPolicy = this.enableMBeanExport.getEnum("registration");
	exporter.setRegistrationPolicy(registrationPolicy);
}