无法从 JMS 侦听器获取域对象

Question

在我的应用程序中，我尝试在某些“事件发生”时向我们的客户发送电子邮件，例如。就像当我们收到付款或新客户登录时...

我成功地能够捕获这些事件，并且我正在尝试发送邮件，但问题来了，我正在使用 JMS 在背景..

因此，当新客户注册时，我将其详细信息保存在数据库中，并生成一个事件。现在要发送邮件，我需要使用下面的代码访问客户（或任何其他相关的域对象）的信息。

protected Map getObjectsMap(Map domainMap){
    Map objectsMap = [:]
    domainMap.each{key,value->
        def dc = grailsApplication.domainClasses.find{it.getFullName().equals(key)}
       // println "dc=$dc; dump=${dc.dump()}" // org.codehaus.groovy.grails.commons.DefaultGrailsDomainClass

        def obj = dc.clazz.get(value)
        //println "value=$value return=$obj; dc.clazz=$dc.clazz; dump=${dc.clazz.dump()}"
        if(!obj) {
            log.error "Could not find object of type $key with id=$value"
            //def session = sessionFactory.currentSession
            //println "session=$session; dump=${session?.dump()}"

        }
        String objectName = key.substring(key.lastIndexOf(".")+1)
        objectName = objectName.charAt(0).toLowerCase().toString() + objectName.substring(1)
        objectsMap.put(objectName, obj)
    }
    return objectsMap
}

问题是该代码在我的本地计算机上运行（速度较慢），但不在生产服务器上运行。

我认为正在发生的事情是这个后台事件的执行时间早于对象保存到数据库的时间。 （当我保存实例时，我确实有 .save(flush:true) ）。这是堆栈跟踪，我

biz.MailService Could not find object of type customer.Customer with id=5
biz.MailService Could not find object of type customer.Customer with id=5
biz.MailService Could not find object of type payment.Payment with id=7
biz.MailService Could not find object of type payment.Payment with id=7
Mail$$EnhancerByCGLIB$$25d09edf.send Exception raised in message listener
org.springframework.jms.listener.adapter.ListenerExecutionFailedException: Listener method 'send' threw exception; nested exception is java.lang.AssertionError: Could not find the org property. Dumping objectMap: [customer:null, payment:null]. Dumping domainMap: [com.blusynergy.blubilling.customer.Customer:5, com.blusynergy.blubilling.payment.Payment:7]. Expression: org. Values: org = null
    at org.springframework.jms.listener.adapter.MessageListenerAdapter.invokeListenerMethod(MessageListenerAdapter.java:471)
    at grails.plugin.jms.listener.adapter.LoggingListenerAdapter.super$2$invokeListenerMethod(LoggingListenerAdapter.groovy)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:86)
    at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:234)
    at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1049)
    at groovy.lang.ExpandoMetaClass.invokeMethod(ExpandoMetaClass.java:923)
    at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodOnSuperN(ScriptBytecodeAdapter.java:127)
    at grails.plugin.jms.listener.adapter.PersistenceContextAwareListenerAdapter.invokeListenerMethod(PersistenceContextAwareListenerAdapter.groovy:29)
    at org.springframework.jms.listener.adapter.MessageListenerAdapter.onMessage(MessageListenerAdapter.java:355)
    at grails.plugin.jms.listener.adapter.LoggingListenerAdapter.super$2$onMessage(LoggingListenerAdapter.groovy)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:86)
    at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:234)
    at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1049)
    at groovy.lang.ExpandoMetaClass.invokeMethod(ExpandoMetaClass.java:923)
    at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodOnSuperN(ScriptBytecodeAdapter.java:127)
    at grails.plugin.jms.listener.adapter.LoggingListenerAdapter.onMessage(LoggingListenerAdapter.groovy:33)
    at grails.plugin.jms.listener.adapter.PersistenceContextAwareListenerAdapter.super$3$onMessage(PersistenceContextAwareListenerAdapter.groovy)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:86)
    at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:234)
    at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1049)
    at groovy.lang.ExpandoMetaClass.invokeMethod(ExpandoMetaClass.java:923)
    at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodOnSuperN(ScriptBytecodeAdapter.java:127)
    at grails.plugin.jms.listener.adapter.PersistenceContextAwareListenerAdapter.onMessage(PersistenceContextAwareListenerAdapter.groovy:18)
    at org.springframework.jms.listener.AbstractMessageListenerContainer.doInvokeListener(AbstractMessageListenerContainer.java:534)
    at org.springframework.jms.listener.AbstractMessageListenerContainer.invokeListener(AbstractMessageListenerContainer.java:495)
    at org.springframework.jms.listener.AbstractMessageListenerContainer.doExecuteListener(AbstractMessageListenerContainer.java:467)
    at org.springframework.jms.listener.AbstractPollingMessageListenerContainer.doReceiveAndExecute(AbstractPollingMessageListenerContainer.java:323)
    at org.springframework.jms.listener.AbstractPollingMessageListenerContainer.receiveAndExecute(AbstractPollingMessageListenerContainer.java:261)
    at org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.invokeListener(DefaultMessageListenerContainer.java:977)
    at org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.executeOngoingLoop(DefaultMessageListenerContainer.java:969)
    at org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.run(DefaultMessageListenerContainer.java:871)
    at java.lang.Thread.run(Thread.java:619)
Caused by: java.lang.AssertionError: Could not find the org property. Dumping objectMap: [customer:null, payment:null]. Dumping domainMap: [com.blusynergy.blubilling.customer.Customer:5, com.blusynergy.blubilling.payment.Payment:7]. Expression: org. Values: org = null
    at org.codehaus.groovy.runtime.InvokerHelper.assertFailed(InvokerHelper.java:379)
    at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.assertFailed(ScriptBytecodeAdapter.java:662)
    at com.blusynergy.blubilling.biz.MailService.send(MailService.groovy:185)
    at com.blusynergy.blubilling.biz.MailService$$FastClassByCGLIB$$88e80e6a.invoke(<generated>)
    at net.sf.cglib.proxy.MethodProxy.invoke(MethodProxy.java:149)
    at org.springframework.aop.framework.Cglib2AopProxy$CglibMethodInvocation.invokeJoinpoint(Cglib2AopProxy.java:692)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)
    at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:107)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
    at org.springframework.aop.framework.Cglib2AopProxy$DynamicAdvisedInterceptor.intercept(Cglib2AopProxy.java:625)
    at com.blusynergy.blubilling.biz.MailService$$EnhancerByCGLIB$$25d09edf.send(<generated>)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.springframework.util.MethodInvoker.invoke(MethodInvoker.java:273)
    at org.springframework.jms.listener.adapter.MessageListenerAdapter.invokeListenerMethod(MessageListenerAdapter.java:463)
    ... 43 more

对如何解决这个问题有任何想法..??

谨致问候。

Answer 1

您是否在事务中创建对象？

如果是这样，请确保在交易完成后发送消息。

如果没有，也许实施某种重试系统。

干杯

李