Spring integration errors after migration to spring 5-CodePudding

I have been using Spring integration (different types of channels) with Spring 4 for some time. After i tried to upgrade my environment to Spring 5, they stopped working with errors such as the following:

org.springframework.messaging.MessageHandlingException: error occurred during processing message in 'MethodInvokingMessageProcessor' [org.springframework.integration.handler.MethodInvokingMessageProcessor@c192373]; nested exception is java.lang.IllegalArgumentException: BeanFactory must not be null, failedMessage=GenericMessage

Sample channel creation/registration is as follows:

deltaupdatedchannel = new DirectChannel(); deltaupdatedchannel.setBeanName("deltaupdatedcontroller");

    serviceActivator = new ServiceActivatingHandler(deltaSummaryController, "updateDelta2");
    handlerlist.add(serviceActivator);
    
    
    
    beanFactory.registerSingleton("deltaupdatedcontroller", deltaupdatedchannel);
    beanFactory.initializeBean(deltaupdatedchannel, "deltaupdatedcontroller");
    deltaupdatedchannel.subscribe(serviceActivator);

Channels are used to make the following call: this.deltaupdatedcontrollerchannel.send(MessageBuilder.withPayload(summarydto).build());

And channel calls the following code:

public void updateDelta2(DeltaSummaryDTO dto) {

    this.messagingTemplate.convertAndSend(
            "/topic/updatedelta", dto);
}

Here messagingTemplate is org.springframework.messaging.core.MessageSendingOperations.

How can i make them work again?

CodePudding user response：

Share, please, with us the reason doing that registerSingleton(). Why just plain bean registration is not enough for you?

To fix that problem you need to call also initializeBean(Object existingBean, String beanName) after that registerSingleton().

However there is no guarantee that this will be the end of errors. I would suggest to revise a design in favor of normal bean definitions, not that manual one...