如何使用apachecamel扫描dynamodb表? [英] How to scan a dynamodb table using apache camel?

问题描述

我有一个可扫描 DynamoDb 表的骆驼休息 api.代码是这样的 ->

I have a camel rest api which scans a DynamoDb table. The code is like so ->

.post("dynamodb-scan-table")
   .route()
  .toD("aws2-ddb://user?accessKey=insert&secretKey=insert&region=us-east-1&operation=Scan")
  .endRest();

这将返回我表中的所有项目.我的问题是如何根据某个条件扫描表格.在骆驼 docs 中，给出了一个需要设置类型为 Map 的 header CamelAwsDdbScanFilter 以实现我的问题的解决方案.我有一个用户表，假设我想用 FirsName = Will 检索所有用户.我如何实现 Map 以实现这一目标?基本上我不确定在地图的 Condition 中放什么.

This returns all the items in my table. My problem is how to scan the table based on a certain condition. In the camel docs, it is given that there is a header CamelAwsDdbScanFilter which is of the type Map<String, Condition> needs to be set in order to achieve the solution for my problem. I have a table of users and suppose I want to retrieve all the users with FirsName = Will. How do I implement the Map<String, Condition> in order to achieve this? Basically I am not sure what to put in the Condition of the map.

推荐答案

您可以在 ScanCommandTest.

对于条件 FirstName eq Will 过滤器可能是这样的:

For condition FirstName eq Will the filter could be something like:

exchange.getIn().setHeader(DdbConstants.SCAN_FILTER, new HashMap<String, Condition>(){{
    put("FirsName", new Condition()
            .withComparisonOperator(ComparisonOperator.EQ)
            .withAttributeValueList(new AttributeValue().withS("Will")));
}});

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