Lambda AWS没有调用节点mysql回调

时间:2015-07-23 00:53:14

标签: mysql node.js amazon-web-services aws-lambda

我正在尝试通过AWS上的Lambda简单通知服务处理亚马逊简单电子邮件服务发送的退回。

我正在运行以下脚本:

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

var mysql = require('mysql');

Processor = {};

Processor.initializeConnection = function() {
        console.log('Connecting to database');
        Processor.connection = mysql.createConnection({
          host   : 'MYHOST',
          user   : 'MYUSER',
          password : 'PASSWORD',
          database : 'DATABASE'
        });
        console.log('Connection configured');
        Processor.connection.connect(function(err) {
                console.log('****');
                console.log(err);
                if (err != null) {
                        console.log('Could not connect to database');
                        return false;
                } else {
                        console.log('Successfully connected to database');
                        return true;
                }
        });

        console.log('Should not get here');
};

exports.handler = function(event,context){
        console.log('Received event:');
        var message = event.Records[0].Sns.Message;

        // Get the object from the event and show its content type

        if(Processor.initializeConnection()) {
                context.fail('Database connection failed');
                return;
        }

    context.succeed(message);
};

我将此脚本作为index.js以及包含节点mysql模块的node_modules上传为zip文件。

运行此命令时,我从Amazon获得以下输出:

START RequestId: 378b8a8c-30d4-11e5-9db4-9b9537e3f53d 
2015-07-23T00:46:13.159Z    378b8a8c-30d4-11e5-9db4-9b9537e3f53d    Received event: 
2015-07-23T00:46:13.160Z    378b8a8c-30d4-11e5-9db4-9b9537e3f53d    Connecting to database 
2015-07-23T00:46:14.035Z    378b8a8c-30d4-11e5-9db4-9b9537e3f53d    Connection configured 
2015-07-23T00:46:14.095Z    378b8a8c-30d4-11e5-9db4-9b9537e3f53d    Should not get here 
END RequestId: 378b8a8c-30d4-11e5-9db4-9b9537e3f53d 
REPORT RequestId: 378b8a8c-30d4-11e5-9db4-9b9537e3f53d  Duration: 937.51 ms Billed Duration: 1000 ms Memory Size: 128 MB    Max Memory Used: 14 MB  

无法运行connect fallback中的任何代码。因为我没有使用有效的凭据,我希望它能够报告连接失败。

如果我在nodejs下本地运行代码版本,则会触发connect回调。它只是不会在Lambda下开火。

1 个答案:

答案 0 :(得分:2)

由于node.js的异步性质,在执行所有函数之前,您的代码可能会因context.succeed()而退出。

请参阅: