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AZURE WEBJOBS TO THE
RESCUE
@markvanstraten
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AZURE WEB JOBS ARE
SCHEDULED TASKS
ON STEROIDS
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RUN WHATEVER FLOATS
YOUR BOAT
.JS .PY
.PHP
.EXE .BAT .
EXE .SH .CMD
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C# WEBJOBS
SDK = ♥
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Azure
Storage
Queue
Your web app
var queueClient = Settings.GetWebjobStorageAccount.CreateCloudQueueClient();
var queue = queueClient.GetQueueReference("sendEmailQueue");
queue.CreateIfNotExists();
await queue.AddMessageAsync(new CloudQueueMessage(JsonConvert.SerializeObject
(new
SendEmailQueueMessage
{
EmailTemplate = "succes",
OrderId = 1234,
Language = "nl"
})));
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QUEUES
CONTAIN
JSON
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Azure
Storage
Queue
Your Web Job
private static void Main()
{
new JobHost().RunAndBlock();
}
public async static Task SendEmail([QueueTrigger("sendEmailQueue")]
SendEmailQueueMessage message, TextWriter logger)
{
logger.Write("Going to send email for order " + message.OrderId);
}
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AFTER FIVE RETRIES
JOB IS PLACED IN
POISON QUEUE
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POISON QUEUE
private static void Main()
{
new JobHost().RunAndBlock();
}
public async static Task ProcessSendEmailPoisonMessage([QueueTrigger
("sendEmailQueue-poison")] SendEmailQueueMessage message, TextWriter logger)
{
logger.Write("Failed sending email for order " + message.OrderId);
}
Azure
Storage
Poison
Queue
Your Web Job
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EASY DEVOPS
ON QUEUES
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No content
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FREE
DASHBOARD
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https://{mysite}.scm.azurewebsites.net/azurejobs
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FTP
MSDEPLOY
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GOTCHAS
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SITE OFF =
WEBJOB OFF
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ALL
SLOTS
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Solution: suffix queue names with app-version to
let swapped old version deplete its own queue.
sendemails-1.2.3 → sendemails-1.2.4
Con: Manual old queues cleanup after a few
deploys
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FURTHER READING
http://azure.microsoft.com/en-
us/documentation/articles/websites-dotnet-webjobs-
sdk-get-started/
http://www.troyhunt.com/2015/01/azure-webjobs-
are-awesome-and-you.html