Java Spring JPA线程:IllegalArgumentException异常
我对Thread类进行了如下注释:Java Spring JPA线程:IllegalArgumentException异常,java,spring,hibernate,jpa,transactional,Java,Spring,Hibernate,Jpa,Transactional,我对Thread类进行了如下注释: @Transactional(propagation = Propagation.REQUIRED) @Component @Scope("prototype") public class ThreadRetrieveStockInfoEuronext implements Runnable { ... } 线程被连接到控制器类中,并通过Global.poolMultiple.execute(threadRetrieveStockInfoEuronex
@Transactional(propagation = Propagation.REQUIRED)
@Component
@Scope("prototype")
public class ThreadRetrieveStockInfoEuronext implements Runnable {
...
}
线程被连接到控制器类中,并通过Global.poolMultiple.execute(threadRetrieveStockInfoEuronext)调用
全球类:
@SuppressWarnings("unchecked")
@Component
public class Global {
// create ExecutorService to manage threads
public static ExecutorService poolMultiple = Executors.newFixedThreadPool(10);
public static ExecutorService poolSingle = Executors.newFixedThreadPool(1);
...
}
运行应用程序时,会发生以下异常:
java.lang.IllegalArgumentException:无法设置
com.chartinvest.admin.thread.ThreadRetrieveStockInfoEuronext字段
com.chartinvest.controller.RetrievelController.threadRetrieveStockInfoEuronext
到com.sun.proxy.$Proxy52
这是因为您的可运行实现是一个Spring组件,用
@Transactional
注释,而声明性事务是在Spring中通过将类的实际实例包装在处理事务的基于JDK接口的代理中实现的。因此,自动连接的实际对象不是ThreadRetrieveStockInfoEuronext的实例,而是其接口Runnable的实例,该接口委托给ThreadRetrieveStockInfoEuronext的实例
解决此问题的常用方法是自动连接接口,而不是自动连接具体类型。但是在这种情况下,这个类首先不应该是Spring组件,也不应该是事务性的。顺便说一句,使其成为原型会让您产生这样的错觉,即每次调用submitRetrieveStockInfo()时都会创建一个新实例,但这是错误的:创建一个实例并将其自动连接到RetrieveController singleton中,因此对控制器的所有请求都使用相同的runnable
只需使ThreadRetrieveStockInfoEuronext成为一个简单的类,使用new实例化它,将SpringBean作为参数传递,并使其run()
方法调用该SpringBean的事务方法:
@Transactional
@Component
public class ThreadRetrieveStockInfoEuronextImpl implements ThreadRetrieveStockInfoEuronext {
@Override
void doSomething() { ... }
}
public class RetrievelController {
@Autowired
private ThreadRetrieveStockInfoEuronext threadRetrieveStockInfoEuronext;
@RequestMapping(value = "/.retrieveStockInfo.htm", method = RequestMethod.POST)
public ModelAndView submitRetrieveStockInfo(@ModelAttribute("retrieveStockInfoCommand") RetrieveStockInfoCommand command, BindingResult result, HttpServletRequest request) throws Exception {
Runnable runnable = new Runnable() {
@Override
public void run() {
threadRetrieveStockInfoEuronext.doSomething();
}
};
Global.poolMultiple.execute(runnable);
return new ModelAndView(".retrieveStockInfo", "retrieveStockInfoCommand", command);
}
非常感谢JB的建议,该解决方案非常有效!!
@Transactional
@Component
public class ThreadRetrieveStockInfoEuronextImpl implements ThreadRetrieveStockInfoEuronext {
@Override
void doSomething() { ... }
}
public class RetrievelController {
@Autowired
private ThreadRetrieveStockInfoEuronext threadRetrieveStockInfoEuronext;
@RequestMapping(value = "/.retrieveStockInfo.htm", method = RequestMethod.POST)
public ModelAndView submitRetrieveStockInfo(@ModelAttribute("retrieveStockInfoCommand") RetrieveStockInfoCommand command, BindingResult result, HttpServletRequest request) throws Exception {
Runnable runnable = new Runnable() {
@Override
public void run() {
threadRetrieveStockInfoEuronext.doSomething();
}
};
Global.poolMultiple.execute(runnable);
return new ModelAndView(".retrieveStockInfo", "retrieveStockInfoCommand", command);
}