问题描述
我可以从 这个页面看到 当它们用作触发器时,您可以简单地访问队列消息元数据属性,但我想做相反的事情.我有一个将消息写入队列的 Azure 函数,但它当前具有默认的过期时间,我想设置一个更短的过期时间,以便它们只在队列中存活很短的时间.
I can see from this page that you can access a queue message metadata properties simply enough when they are used as a trigger, but I want to do the opposite. I have an Azure function which writes messages to a queue, but it current has the default Expiration Time and I want to set a much shorter expiration time so they only live on the queue for a very short period.
有没有办法在将消息从 Azure Function 写入队列时设置过期时间?
Is there a way when writing the message to the queue from the Azure Function to set the Expiration time?
谢谢
编辑 1:一个警告是我不提前知道队列的名称.那是传入消息的一部分,因此将 queuename 设置为输出绑定的参数我按照@Mikhail 的建议进行了更改.这是它的功能:
EDIT 1: One caveat is that I dont know the name of the queue ahead of time. That is part of the incoming message, so the queuename is set as a parameter of the output binding I made the change as recommended by @Mikhail. Here is the function as it stands:
#r "Microsoft.WindowsAzure.Storage"
#r "Newtonsoft.Json"
using System;
using Microsoft.WindowsAzure.Storage.Queue;
using Newtonsoft.Json;
public static void Run(MyType myEventHubMessage, CloudQueue outputQueue, TraceWriter log)
{
var deviceId = myEventHubMessage.DeviceId;
var data = JsonConvert.SerializeObject(myEventHubMessage);
var msg = new CloudQueueMessage(data);
log.Info($"C# Event Hub trigger function processed a message: {deviceId}");
outputQueue.AddMessage(msg, TimeSpan.FromMinutes(3), null, null, null);
}
public class MyType
{
public string DeviceId { get; set; }
public double Field1{ get; set; }
public double Field2 { get; set; }
public double Field3 { get; set; }
}
以及我的function.json中的输出绑定:
And the output binding in my function.json:
{
"type": "CloudQueue",
"name": "$return",
"queueName": "{DeviceId}",
"connection": "myConn",
"direction": "out"
}
推荐答案
将参数类型改为CloudQueue
,然后手动添加消息并设置过期时间属性(或者更确切地说是生存时间).
Change the type of your parameter to CloudQueue
, then add a message manually and set the expiration time property (or rather Time To Live).
public static void Run(string input, CloudQueue outputQueue)
{
outputQueue.AddMessage(
new CloudQueueMessage("Hello " + input),
TimeSpan.FromMinutes(5));
}
如果您的输出队列名称取决于请求,您可以使用命令式绑定:
if your output queue name depends on request, you can use imperative binding:
public static void Run(string input, IBinder binder)
{
string outputQueueName = "outputqueue " + input;
QueueAttribute queueAttribute = new QueueAttribute(outputQueueName);
CloudQueue outputQueue = binder.Bind<CloudQueue>(queueAttribute);
outputQueue.AddMessage(
new CloudQueueMessage("Hello " + input),
TimeSpan.FromMinutes(5));
}
这篇关于用于写入队列的 Azure 函数 - 我可以设置元数据吗?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持跟版网!