paulwong

SPRING INTEGRATION ERROR HANDLING

https://github.com/zakyalvan/spring-integration-java-dsl-learn

package com.jwebs.learn.errorhandling;

import java.util.Random;

import javax.jms.ConnectionFactory;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.context.annotation.Bean;
import org.springframework.integration.annotation.IntegrationComponentScan;
import org.springframework.integration.channel.PublishSubscribeChannel;
import org.springframework.integration.core.MessageSource;
import org.springframework.integration.dsl.IntegrationFlow;
import org.springframework.integration.dsl.IntegrationFlows;
import org.springframework.integration.dsl.core.Pollers;
import org.springframework.integration.dsl.jms.Jms;
import org.springframework.integration.support.MessageBuilder;
import org.springframework.messaging.MessagingException;

/**
 * Show how to handle error in spring integration flow.
 * Please note, errorChannel in spring integration only applicable to
 * error thrown in asynch component.
 * 
 * 
@author zakyalvan
 
*/
@SpringBootApplication
@IntegrationComponentScan
public class ErrorHandlingApplication {
    public static void main(String[] args) throws Exception {
        ConfigurableApplicationContext applicationContext = new SpringApplicationBuilder(ErrorHandlingApplication.class)
                .web(false)
                .run(args);
        
        Runtime.getRuntime().addShutdownHook(new Thread(() -> applicationContext.close()));
        
        System.out.println("Pres enter key to exit");
        System.in.read();
        System.exit(0);
    }

    @Autowired
    private ConnectionFactory connectionFactory;
    
    @Bean
    public MessageSource<Integer> randomIntegerMessageSource() {
        return () -> MessageBuilder.withPayload(new Random().nextInt()).build();
    }
    
    @Bean
    public IntegrationFlow withErrorFlow() {
        return IntegrationFlows.from(randomIntegerMessageSource(), spec -> spec.poller(Pollers.fixedDelay(1000)))
                    .handle(Jms.outboundGateway(connectionFactory)
                    .requestDestination("processor.input")
                    .replyContainer(spec -> spec.sessionTransacted(true)))
                    .get();
    }
    
    @Autowired
    @Qualifier("errorChannel")
    private PublishSubscribeChannel errorChannel;
    
    @Bean
    public IntegrationFlow errorHandlingFlow() {
        return IntegrationFlows.from(errorChannel)
                .handle(message -> System.out.println("@@@@@@@@@@@@@@@@@@@@@" + ((MessagingException) message.getPayload()).getFailedMessage().getPayload()))
                .get();
    }
}

posted on 2020-01-10 15:32 paulwong 阅读(110) 评论(0)  编辑  收藏 所属分类: SPRING INTERGRATION


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