AWS中SQS的几项使用注意

AWS中的SQS收发message时,有几点需要注意:

1.message可以有参数,参数的类型锁定在“Binary”,“Number”,“String”三类。

2.message的参数有个数限制,限制在10个(小于或等于10个)。

3.鉴于参数个数限制,他的大小应当也是有限制的(尚未测出)。

4.超过10个参数怎么办?

   将几个参数合并为dictionary,后转成binary存储。

 1 Dictionary<string, int> dicIntParat = new Dictionary<string, int>();
 2             dicIntParat["DataDownloadID"] = _dataDownload.DataDownloadID;
 3             dicIntParat["CreateUserID"] = _dataDownload.CreateUserID;
 4             dicIntParat["TopicClientID"] = _dataDownload.TopicClientID;
 5             dicIntParat["ProcessStatusID"] = _dataDownload.ProcessStatusID;
 6             MemoryStream msNumber = new MemoryStream();
 7             BinaryFormatter bf = new BinaryFormatter();
 8             bf.Serialize(msNumber, dicIntParat);
 9             
10             MessageAttributeValue DataDownloadIDValue = new MessageAttributeValue();
11             DataDownloadIDValue.DataType = "Binary";
12             DataDownloadIDValue.BinaryValue = msNumber;
13             sendMessageRequest.MessageAttributes["DataDownloadID"] = DataDownloadIDValue;

读取message时,也相应的将Binary转换成dictionary后取值。

1  MemoryStream msNumber = new MemoryStream();
2                             BinaryFormatter bf = new BinaryFormatter();
3                             msNumber = result.Messages[i].MessageAttributes["DataDownloadID"].BinaryValue;
4                             Dictionary<string, int> dicIntParat = (Dictionary<string, int>)bf.Deserialize(msNumber);
5 
6 dd.DataDownloadID = dicIntParat["DataDownloadID"];
7 dd.CreateUserID = dicIntParat["CreateUserID"];
8 dd.TopicClientID = dicIntParat["TopicClientID"];
9 dd.ProcessStatusID = dicIntParat["ProcessStatusID"];

 

posted on 2018-03-07 11:30  Riusmary  阅读(3132)  评论(0编辑  收藏  举报

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