AWS Lambda Cloudwatch规则

Question

我创建了具有以下事件模式的CloudWatch规则：

{
  "detail-type": [
    "EMR Cluster State Change"
  ],
  "source": [
    "aws.emr"
  ]
}

其思想是，每当集群的状态发生变化时，它都会调用lambda函数。

现在的问题是，当它调用lambda函数时，会出现以下错误：

An error occurred during JSON parsing: java.lang.RuntimeException
java.lang.RuntimeException: An error occurred during JSON parsing
Caused by: java.io.UncheckedIOException: com.fasterxml.jackson.databind.JsonMappingException: Conflicting setter definitions for property "state": com.amazonaws.services.cloudwatchevents.model.Rule#setState(1 params) vs com.amazonaws.services.cloudwatchevents.model.Rule#setState(1 params)
Caused by: com.fasterxml.jackson.databind.JsonMappingException: Conflicting setter definitions for property "state": com.amazonaws.services.cloudwatchevents.model.Rule#setState(1 params) vs com.amazonaws.services.cloudwatchevents.model.Rule#setState(1 params)

带代码：

import com.amazonaws.services.lambda.runtime.Context;
import com.amazonaws.services.lambda.runtime.RequestHandler;
import com.amazonaws.services.cloudwatchevents.model.Rule;

public class ErrorLambda implements RequestHandler<Rule, String>  {

    private static final Logger LOG = Logger.getLogger(ErrorLambda.class);

    public String handleRequest(Rule input, Context context) {
         LOG.info("Rule is " + input);
         return "Ok";
    }
}

那么，我应该使用哪个类来解析CloudWatch规则事件？

谢谢你。

Answer 1

您可以侦听文档中的一种事件类型，

http://docs.aws.amazon.com/AmazonCloudWatch/latest/events/EventTypes.html

规则不是cloudwatch事件。

您还可以定义动态对象，并获取发送到Lambda的对象的详细信息。

希望有帮助。