线程池中如何使用Spring事务

快来打我* 2022-04-12 03:14 587阅读 0赞

下面的代码在线程池中调用`deviceInfoService`服务的`updateDeviceInfo`方法，接着抛出空指针异常，然而数据没有回滚。

public void testUpdate() {
    	executor.execute(new Runnable() {
    		@Override
    		public void run() {
    			DeviceInfo deviceInfo = new DeviceInfo();
    			deviceInfo.setDeviceId(95352L);
    			deviceInfo.setRoomName("我的小窝");
    			deviceInfoService.updateDeviceInfo(deviceInfo);
    			throw new NullPointerException();
    		}
    	});
    }

下面想自己手动进行事务提交，但是通过注入`PlatformTransactionManager`的方式获取事务，会抛出异常

Exception in thread "taskExecutor-1" org.springframework.transaction.IllegalTransactionStateException: Transaction is already completed - do not call commit or rollback more than once per transaction
    	at org.springframework.transaction.support.AbstractPlatformTransactionManager.rollback(AbstractPlatformTransactionManager.java:821)
    	at com.clife.business.csleep.hotel.device.service.DeviceInfoServiceImpl$2.run(DeviceInfoServiceImpl.java:532)
    	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
    	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    	at java.lang.Thread.run(Thread.java:744)

@Resource
    private PlatformTransactionManager txManager;
    public void testUpdate() {
    	executor.execute(new Runnable() {
    		@Override
    		public void run() {
    			DefaultTransactionDefinition def = new DefaultTransactionDefinition();
    			def.setPropagationBehavior(TransactionDefinition.PROPAGATION_REQUIRED);
    			TransactionStatus status = txManager.getTransaction(def);
    			try {
    				DeviceInfo deviceInfo = new DeviceInfo();
    				deviceInfo.setDeviceId(95352L);
    				deviceInfo.setRoomName("我的小窝");
    				deviceInfoService.updateDeviceInfo(deviceInfo);
    				// 提交事务
    				txManager.commit(status);
    				throw new NullPointerException();
    			} catch (Exception e) {
    				// 回滚事务
    				txManager.rollback(status);
    			}
    		}
    	});
    }

下面的代码在线程池中获取`PlatformTransactionManager`实例，这种方式是可行的

public void testUpdate() {
    	executor.execute(new Runnable() {
    		@Override
    		public void run() {
    
    			DefaultTransactionDefinition def = new DefaultTransactionDefinition();
    			def.setPropagationBehavior(TransactionDefinition.PROPAGATION_REQUIRED);
    			PlatformTransactionManager txManager = ContextLoader.getCurrentWebApplicationContext().getBean(PlatformTransactionManager.class);
    			TransactionStatus status = txManager.getTransaction(def);
    
    			try {
    				DeviceInfo deviceInfo = new DeviceInfo();
    				deviceInfo.setDeviceId(95352L);
    				deviceInfo.setRoomName("我的小窝");
    				deviceInfoService.updateDeviceInfo(deviceInfo);
    				// 提交事务
    				txManager.commit(status);
    				throw new NullPointerException();
    			} catch (Exception e) {
    				// 回滚事务
    				txManager.rollback(status);
    			}
    			
    		}
    	});
    }