将spring配置映射到集成流程

时间:2016-03-25 15:55:37

标签: java spring spring-boot spring-integration spring-java-config

我有一个Spring Boot / Integration应用程序,其集成流程以RabbitMQ队列开头。流本身和应用程序通常都运行良好,但是初始入站AMQP配置有很多冗余配置。

目前我有十DataType个,每个都有略微变化的属性,其中一些需要在运行时定义。我为每个初始化一个入站流,设置几个标头,然后快速将它们转储到一个公共通道进行处理。

NetworkDiagnostic DataType一个的Java配置如下所示:

@Bean
public IntegrationFlow inboundNetworkDiagnosticFlow(@Qualifier("connectionFactory") ConnectionFactory connectionFactory,
                                                    @Qualifier(BeanNames.INBOUND_EVENTS_CHANNEL) MessageChannel outbound,
                                                    @Qualifier(BeanNames.JSON_NODE_MESSAGE_CONVERTER) MessageConverter messageConverter,
                                                    @Qualifier("networkDiagnosticQueue") Queue queue,
                                                    @Value("${networkDiagnostic.numConsumers}") int numConsumers,
                                                    @Value("${networkDiagnostic.prefetchCount}") int prefetchCount) {
    return makeEventIntegrationFlow(connectionFactory, outbound, messageConverter, queue, numConsumers, prefetchCount,
            DataTypes.EVENT_NETWORK_DIAGNOSTIC);

}

@Bean
public Binding networkDiagnosticBinding(@Qualifier("networkDiagnosticQueue") Queue queue) {
    return makeFanoutBinding(queue, NETWORK_DIAGNOSTIC_EXCHANGE_NAME);
}


@Bean
public Queue networkDiagnosticQueue() {
    return makeQueue(NETWORK_DIAGNOSTIC_QUEUE_STRING);
}

@Bean
public FanoutExchange networkDiagnosticExchange() {
    return new FanoutExchange(NETWORK_DIAGNOSTIC_EXCHANGE_NAME);
}

另外九个并行配置。我想更多地考虑这一点,以便a)重复被删除,以及b)可以从服务器上的配置文件中简单地配置更多输入。

我的一般想法是我会有一个yaml配置文件:

data_types:
   - name: network-diagnostic
     schema: event
     window_type: hourly
     exchange_name: blahblahblah
     queue_name: blahblahblah
     ...
   - name: log-diagnostic
   ...

,通过@ConfigurationProperties我会映射到或多或少的类:

 /**
 * Organizes information and configuration for a DataType
 */
public class DataType {
    private String name;
    private Schema schema;
    private WindowType windowType;
    private long bucketLength;

    private String exchange;
    private String routingKey;
    ...

而且我需要一些方法 - registerAllBeans - 期望所有的DataTypes,它们会创建所有必需的bean(及其相互关系),并在每个上调用SingletonBeanRegistry::registerSingleton

那就是说,我不确定该方法何时应该运行,以及如何让它运行呢。一方面,我需要在配置属性创建的bean可访问之后运行,但在生命周期管理开始之前(因此我的集成流程将被管理),最好在RabbitAdmin::afterPropertiesSet之前,所以我也可以获得我的RabbitMQ对象的隐式声明。

我怎样才能做到这一点?

更新:我按照下面的@ ArtemBilan的建议编写了一个模拟示例代码,我将在此处进行编写。

主要类别:

@EnableAutoConfiguration
@Configuration
public class DemoApplication {

    public static void main(String[] args) {
        SpringApplicationBuilder parentBuilder = new SpringApplicationBuilder(DemoApplication.class);
        parentBuilder.child(ChildConfiguration.class).properties("name=bob", "message='hi how are you?'").run();
        parentBuilder.child(ChildConfiguration.class).properties("name=jane", "message='hi how are you?'").run();
    }

    @Bean
    public IntegrationFlow integrationFlow() {
        Object object = new Object();
        return IntegrationFlows.from("inputChannel")
                .handle(m -> System.out.println(object + " " + m.getPayload() + " " + System.currentTimeMillis()))
                .get();
    }
}

子配置:

@EnableAutoConfiguration
@EnableConfigurationProperties(Sample.class)
@Configuration
public class ChildConfiguration {

    @Bean
    public IntegrationFlow anotherOutgoingFlow(Sample sample) {
        return IntegrationFlows
                .from(() -> new GenericMessage<>("hello " + sample.getName() + "; " + sample.getMessage()),
                        m -> m.poller(Pollers.fixedDelay(500)))
                .channel("inputChannel")
                .get();
    }
}

模型类:

@ConfigurationProperties
public class Sample {
    private String name;
    private String message;

    public Sample() { }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getMessage() {
        return message;
    }

    public void setMessage(String message) {
        this.message = message;
    }
}

打印,例如:

2016-03-25 17:12:04.109  INFO 24637 --- [           main] com.example.DemoApplication              : Started DemoApplication in 0.169 seconds (JVM running for 3.878)
java.lang.Object@25c4da11 hello bob; 'hi how are you?' 1458940324438
java.lang.Object@25c4da11 hello jane; 'hi how are you?' 1458940324607
java.lang.Object@25c4da11 hello bob; 'hi how are you?' 1458940324938
java.lang.Object@25c4da11 hello jane; 'hi how are you?' 1458940325108
java.lang.Object@25c4da11 hello bob; 'hi how are you?' 1458940325439

1 个答案:

答案 0 :(得分:1)

当您能够根据提供的环境重用模板配置时,请考虑为您的应用程序使用parent/child架构。

有关详细信息,请参阅Spring Boot Reference Manual