lambda和DynamoDB连接

1. 在DynamoDB当作创建一个新表,然后在项目当中创建,把string value的值填写一下。
2. 在IAM创建角色附加 AWSLambdaDynamoDBExecutionRole权限
3. 在lambda中创建函数，选择DynamoDB不附加其他条件的蓝图
4. 选择第1步创建的DynamoDB表，完成lambda函数的创建。
5. 打开lambda函数的index.js,代码进行重写，内容如下

var AWS = require('aws-sdk');

var dynamo = new AWS.DynamoDB({

    region: 'ap-northeast-1'

});

exports.handler = function(event, context) {

    var params = {

        "TableName": "sbrtest",         #表名

        "KeyConditionExpression":"this = :sbrtest",   #建表时候的关键字和函数名

        "ExpressionAttributeValues": {

            ":sbrtest" : {"S": event.sbrtest}    #函数名

        }

    };

    console.log("event:", event);

    dynamo.query(params, function(err, data) {

        console.log("dynamo_data:", data);

        console.log("dynamo_err:", err);

        context.done(null, data);

    });

};

1. 内容进行保存
2. 对编辑好的表进行测试，测试代码如下

{

  "Records": [

    {

      "eventID": "1",

      "eventVersion": "1.0",

      "dynamodb": {

        "Keys": {

          "Id": {

            "N": "101"

          }

        },

        "NewImage": {

          "Message": {

            "S": "New item!"

          },

          "Id": {

            "N": "101"

          }

        },

        "StreamViewType": "NEW_AND_OLD_IMAGES",

        "SequenceNumber": "111",

        "SizeBytes": 26

      },

      "awsRegion": "ap-northeast-1",

      "eventName": "INSERT",

      "eventSourceARN": "arn:aws:dynamodb:ap-northeast-1:382459439888:table/sbrtest0313",

      "eventSource": "aws:dynamodb"

    },

    {

      "eventID": "2",

      "eventVersion": "1.0",

      "dynamodb": {

        "OldImage": {

          "Message": {

            "S": "New item!"

          },

          "Id": {

            "N": "101"

          }

        },

        "SequenceNumber": "222",

        "Keys": {

          "Id": {

            "N": "101"

          }

        },

        "SizeBytes": 59,

        "NewImage": {

          "Message": {

            "S": "This item has changed"

          },

          "Id": {

            "N": "101"

          }

        },

        "StreamViewType": "NEW_AND_OLD_IMAGES"

      },

      "awsRegion": "ap-northeast-1",

      "eventName": "MODIFY",

      "eventSourceARN": "arn:aws:dynamodb:ap-northeast-1:382459439888:table/sbrtest0313",

      "eventSource": "aws:dynamodb"

    },

    {

      "eventID": "3",

      "eventVersion": "1.0",

      "dynamodb": {

        "Keys": {

          "Id": {

            "N": "101"

          }

        },

        "SizeBytes": 38,

        "SequenceNumber": "333",

        "OldImage": {

          "Message": {

            "S": "This item has changed"

          },

          "Id": {

            "N": "101"

          }

        },

        "StreamViewType": "NEW_AND_OLD_IMAGES"

      },

      "awsRegion": "ap-northeast-1",

      "eventName": "REMOVE",

      "eventSourceARN": "arn:aws:dynamodb:ap-northeast-1:382459439888:table/sbrtest0313",

      "eventSource": "aws:dynamodb"

    }

  ]

}

1. 函数页面会显示测试成功
2. 在DynamoDB的触发选项中，也能够发现出现了新的数据。