spring 集成rabbit-mq json MessagingException

Question

我正在使用 Spring Integration 發送通知，作為錯誤測試用例，我發送格式錯誤的 JSON（地圖）並收到 MessagingException，它似乎一直在繼續......沒有停止......我必須殺死應用程序。

所以想知道如何捕獲這個，可能是通過errorChannel。 代碼示例會有所幫助。

我的 Spring 集成配置：

 <!-- channel to connect to disruption exchange -->
    <int-amqp:publish-subscribe-channel id="inputChannel"
                                        connection-factory="connectionFactory"
                                        exchange="notification.exchange"/>

    <int:json-to-object-transformer input-channel="inputChannel"
                                    output-channel="notificationChannel"
                                    type="java.util.Map"/>

    <int:channel id="notificationChannel">
        <int:interceptors>
            <int:wire-tap channel="loggingChannel"/>
        </int:interceptors>
    </int:channel>

    <int:logging-channel-adapter id="loggingChannel" log-full-message="true" logger-name="tapInbound" level="INFO"/>

    <!-- depending on the deviceType route to either apnsChannel or gcmChannel -->
    <int:router ref="notificationTypeRouter" input-channel="notificationChannel"/>

    <!-- apple push notification channel-->
    <int:channel id="apnsChannel"/>

    <!-- service activator to process disruptionNotificationChannel -->
    <int:service-activator input-channel="apnsChannel" ref="apnsPushNotificationService" method="pushNotification"/>

    <!-- google cloud messaging notification channel-->
    <int:channel id="gcmChannel"/>

    <!-- service activator to process disruptionNotificationChannel -->
    <int:service-activator input-channel="gcmChannel" ref="gcmPushNotificationService" method="pushNotification"/>

    <!-- error channel to may be log to file or email or store to db in the future -->
    <int:channel id="errorChannel"/>

    <int:service-activator input-channel="errorChannel" ref="notificationErrorHandler" method="handleFailedNotification"/>

    <!-- Infrastructure -->
    <rabbit:connection-factory id="connectionFactory"
                               host="${spring.rabbitmq.host}"
                               port="${spring.rabbitmq.port}"
                               username="${spring.rabbitmq.username}"
                               password="${spring.rabbitmq.password}"/>

    <rabbit:template id="amqpTemplate" connection-factory="connectionFactory"/>

    <rabbit:admin connection-factory="connectionFactory"/>

    <rabbit:fanout-exchange name="notification.exchange"/>

我還有一個錯誤處理程序：

public class NotificationErrorHandler {

    private final Logger LOG = LoggerFactory.getLogger(NotificationErrorHandler.class);

    public void handleFailedNotification(Message<MessageHandlingException> message) {
        Map<String, Object> map = (Map) message.getPayload();
        Notification notification = Notification.fromMap(map);
        saveToBD(notification);
    }

    private void saveToBD(Notification notification) {
        LOG.error("[Notification-Error-Handler] Couldn't Send Push notification: device='{}', type='{}', pushId='{}', message='{}', uid='{}'",
                new Object[]{notification.getDevice(),
                        notification.getDeviceType(),
                        notification.getDeviceToken(),
                        notification.getBody(),
                        notification.getUid()});
    }
}

這是例外：

Caused by: org.springframework.messaging.MessagingException: Failure occured in AMQP listener while attempting to convert and dispatch Message.; nested exception is org.springframework.integration.transformer.MessageTransformationException: failed to transform message; nested exception is com.fasterxml.jackson.core.JsonParseException: Unexpected character ('}' (code 125)): was expecting double-quote to start field name
 at [Source: [B@7a707c2c; line: 7, column: 2]
    at org.springframework.integration.amqp.channel.AbstractSubscribableAmqpChannel$DispatchingMessageListener.onMessage(AbstractSubscribableAmqpChannel.java:202)
    at org.springframework.amqp.rabbit.listener.AbstractMessageListenerContainer.doInvokeListener(AbstractMessageListenerContainer.java:799)
    ... 10 common frames omitted
Caused by: org.springframework.integration.transformer.MessageTransformationException: failed to transform message; nested exception is com.fasterxml.jackson.core.JsonParseException: Unexpected character ('}' (code 125)): was expecting double-quote to start field name
 at [Source: [B@7a707c2c; line: 7, column: 2]
    at org.springframework.integration.transformer.AbstractTransformer.transform(AbstractTransformer.java:44)
    at org.springframework.integration.transformer.MessageTransformingHandler.handleRequestMessage(MessageTransformingHandler.java:68)
    at org.springframework.integration.handler.AbstractReplyProducingMessageHandler.handleMessageInternal(AbstractReplyProducingMessageHandler.java:99)
    at org.springframework.integration.handler.AbstractMessageHandler.handleMessage(AbstractMessageHandler.java:78)
    at org.springframework.integration.dispatcher.BroadcastingDispatcher.invokeHandler(BroadcastingDispatcher.java:160)
    at org.springframework.integration.dispatcher.BroadcastingDispatcher.dispatch(BroadcastingDispatcher.java:142)
    at org.springframework.integration.amqp.channel.AbstractSubscribableAmqpChannel$DispatchingMessageListener.onMessage(AbstractSubscribableAmqpChannel.java:181)
    ... 11 common frames omitted
Caused by: com.fasterxml.jackson.core.JsonParseException: Unexpected character ('}' (code 125)): was expecting double-quote to start field name
 at [Source: [B@7a707c2c; line: 7, column: 2]
    at com.fasterxml.jackson.core.JsonParser._constructError(JsonParser.java:1419)
    at com.fasterxml.jackson.core.base.ParserMinimalBase._reportError(ParserMinimalBase.java:508)
    at com.fasterxml.jackson.core.base.ParserMinimalBase._reportUnexpectedChar(ParserMinimalBase.java:437)

希望有人能幫忙。

提前致謝 GM

---

根據@Gary 的回答所做的更改及其現在的工作：

<!-- Infrastructure -->
    <rabbit:connection-factory id="connectionFactory"
                               host="${spring.rabbitmq.host}"
                               port="${spring.rabbitmq.port}"
                               username="${spring.rabbitmq.username}"
                               password="${spring.rabbitmq.password}"/>

    <rabbit:admin connection-factory="connectionFactory"/>

    <rabbit:template id="amqpTemplate" connection-factory="connectionFactory"/>

    <rabbit:direct-exchange name="notification.direct">
        <rabbit:bindings>
            <rabbit:binding queue="notification.queue" key="notification.queue"/>
        </rabbit:bindings>
    </rabbit:direct-exchange>

    <rabbit:queue id="notification.queue" name="notification.queue"/>

    <int-amqp:inbound-channel-adapter channel="inputChannel"
                                      queue-names="notification.queue"
                                      connection-factory="connectionFactory"
                                      error-channel="errorChannel"/>

    <int:json-to-object-transformer input-channel="inputChannel"
                                    output-channel="notificationChannel"
                                    type="java.util.Map"/>

    <int:channel id="notificationChannel">
        <int:interceptors>
            <int:wire-tap channel="loggingChannel"/>
        </int:interceptors>
    </int:channel>

    <int:logging-channel-adapter id="loggingChannel" log-full-message="true" logger-name="tapInbound" level="INFO"/>

    <!-- depending on the deviceType route to either apnsChannel or gcmChannel -->
    <int:router ref="notificationTypeRouter" input-channel="notificationChannel"/>

    <!-- apple push notification channel-->
    <int:channel id="apnsChannel"/>

    <!-- service activator to process disruptionNotificationChannel -->
    <int:service-activator input-channel="apnsChannel" ref="apnsPushNotificationService" method="pushNotification"/>

    <!-- google cloud messaging notification channel-->
    <int:channel id="gcmChannel"/>

    <!-- service activator to process disruptionNotificationChannel -->
    <int:service-activator input-channel="gcmChannel" ref="gcmPushNotificationService" method="pushNotification"/>

    <!-- no op channel where message is logged for unknown devices -->
    <int:channel id="noOpChannel"/>

    <!-- service activator to process disruptionNotificationChannel -->
    <int:service-activator input-channel="noOpChannel" ref="noOpPushNotificationService" method="pushNotification"/>

    <!-- error channel to may be log to file or email or store to db in the future -->
    <int:channel id="errorChannel"/>

    <int:service-activator input-channel="errorChannel" ref="notificationErrorHandler"/>

Answer 1

為什么要從發布訂閱渠道開始流程？ 使用 pub/sub 頻道進行消息分發是不正常的。

如果您可以改用消息驅動的通道適配器，則可以添加錯誤通道。

您不能向發布訂閱頻道添加錯誤頻道。 但是，您可以注入錯誤處理程序（實現org.springframework.util.ErrorHandler ）並在檢測到致命錯誤時拋出AmqpRejectAndDontRequeueException 。

您還可以在通道中使用 Json MessageConverter，而不是在流中使用下游的 Json 轉換器； 在這種情況下，默認錯誤處理程序將檢測到消息轉換異常並拒絕消息而不是重新排隊。