聊聊DisposableBeanAdapter

序

本文主要研究一下DisposableBeanAdapter

DisposableBean

spring-beans/src/main/java/org/springframework/beans/factory/DisposableBean.java

public interface DisposableBean {

	/**
	 * Invoked by the containing {@code BeanFactory} on destruction of a bean.
	 * @throws Exception in case of shutdown errors. Exceptions will get logged
	 * but not rethrown to allow other beans to release their resources as well.
	 */
	void destroy() throws Exception;

}

DisposableBean定义了destroy方法

DisposableBeanAdapter

spring-beans/src/main/java/org/springframework/beans/factory/support/DisposableBeanAdapter.java

class DisposableBeanAdapter implements DisposableBean, Runnable, Serializable {

	private static final String CLOSE_METHOD_NAME = "close";

	private static final String SHUTDOWN_METHOD_NAME = "shutdown";

	private static final Log logger = LogFactory.getLog(DisposableBeanAdapter.class);


	private final Object bean;

	private final String beanName;

	private final boolean invokeDisposableBean;

	private final boolean nonPublicAccessAllowed;

	@Nullable
	private final AccessControlContext acc;

	@Nullable
	private String destroyMethodName;

	@Nullable
	private transient Method destroyMethod;

	@Nullable
	private final List beanPostProcessors;

	@Override
	public void run() {
		destroy();
	}

	@Override
	public void destroy() {
		if (!CollectionUtils.isEmpty(this.beanPostProcessors)) {
			for (DestructionAwareBeanPostProcessor processor : this.beanPostProcessors) {
				processor.postProcessBeforeDestruction(this.bean, this.beanName);
			}
		}

		if (this.invokeDisposableBean) {
			if (logger.isTraceEnabled()) {
				logger.trace("Invoking destroy() on bean with name '" + this.beanName + "'");
			}
			try {
				if (System.getSecurityManager() != null) {
					AccessController.doPrivileged((PrivilegedExceptionAction