Spring在返回时不必要地修改Bean

Question

我从Spring经历了非常奇怪的行为。 我有一个@Bean返回一个Map。 但是，当Bean使用@Autowired插入时，映射的键与@Bean方法中分配的键不同。 我的@Bean有两个输入参数，它们也是另一个配置类中的Spring Bean。 一旦@Autowired更改了我的地图的键，以匹配作为我的Map返回Bean的依赖项传递的@Bean方法的名称。 有问题的@Bean位于@ConfigurationProperties类中，在该类中，我从application.yml文件中提取了一些正确返回的值。

@Component
@ConfigurationProperties(prefix = "channel-broker")
@EnableConfigurationProperties
public class ChannelLookupConfig {

    private String messageDeliveryChannelKey;

    private String otherDeliveryChannelKey;


    public String getMessageDeliveryChannelKey() {
        return messageDeliveryChannelKey;
    }

    public void setMessageDeliveryChannelKey(String messageDeliveryChannelKey) {
        this.messageDeliveryChannelKey = messageDeliveryChannelKey;
    }

    public String getOtherDeliveryChannelKey() {
        return otherDeliveryChannelKey;
    }

    public void setOtherDeliveryChannelKey(String OtherDeliveryChannelKey) {
        this.otherDeliveryChannelKey = OtherDeliveryChannelKey;
    }

    @Bean
    public Map<String, MessageDeliveryClient> channelCallerLookup(MessageDeliveryClient MessageDispatcherClient, MessageDeliveryClient otherDeliveryClient) {
        Map<String, MessageDeliveryClient> channelCallerLookup = new HashMap<>();
        channelCallerLookup.put(messageDeliveryChannelKey, MessageDispatcherClient);
        channelCallerLookup.put(otherDeliveryChannelKey, otherDeliveryClient);
        return channelCallerLookup;
    }
}

我的第二个配置文件

@Configuration
public class Config {
    @Bean
    public MessageDeliveryClient MessageDispatcherClient() {
        MessageDeliveryClient client = MessageDeliveryClient.builder()
                .awsAccessKey(destinationSqsAccessKey)
                .awsSecretKey(destinationSqsSecretKey)
                .awsRegion(destinationSqsRegion)
                .destinationQueueName(destinationSqsName)
                .build();
        return client;
    }

    @Bean
    public MessageDeliveryClient otherPickerDeliveryClient() {
        MessageDeliveryClient client = MessageDeliveryClient.builder()
                .awsAccessKey(destinationSqsAccessKey)
                .awsSecretKey(destinationSqsSecretKey)
                .awsRegion(destinationSqsRegion)
                .destinationQueueName(destinationOtherPickerSqsName)
                .build();
        return client;
    }
}

自动接线以用于以下用途：

public class SimpleCustomerMessageDeliveryBrokerImpl implements CustomerMessageDeliveryBroker {
        private Map<String, MessageDeliveryClient> channelCallerLookup = new HashMap<>();

        @Autowired
        public void setBrokerConfiguration(BrokerConfiguration brokerConfiguration) {
            this.brokerConfiguration = brokerConfiguration;
        }
    }

地图应该包含2种元素的第一与密钥等于在字符串的值messageDeliveryChannelKey和第二用钥匙等于在字符串的值otherDeliveryChannelKey 。 但是，键始终设置为等于传递到我的乐谱中的@Beans方法的名称。 即使我将方法名称更改为废话，地图的键也将等于该值。

如何防止这种行为发生

Answer 1

发生这种情况是由于默认的Spring行为。 要解决此问题，我在返回Map周围应用了包装器。

将我的Bean更改为此

@Bean
public ChannelCallerLookup channelCallerLookup(MessageDeliveryClient messageDispatcherClient, MessageDeliveryClient otherPickerDeliveryClient) {
    HashMap<String, MessageDeliveryClient> channelCallerLookup = new HashMap<>();
    channelCallerLookup.put(CHANNEL1_KEY, messageDispatcherClient);
    channelCallerLookup.put(CHANNEL1_KEY2, otherPickerDeliveryClient);
    ChannelCallerLookup callerLookup = new ChannelCallerLookup(channelCallerLookup);
    return callerLookup;
}

创建了此包装器类

public class ChannelCallerLookup {

    Map<String, MessageDeliveryClient> lookupMap;

    public ChannelCallerLookup(Map<String, MessageDeliveryClient> lookupMap) {
        this.lookupMap = lookupMap;
    }

    public Map<String, MessageDeliveryClient> getLookupMap() {
        return lookupMap;
    }

    public MessageDeliveryClient get(String key){
        return lookupMap.get(key);
    }
}