WebJob QueueTrigger 如何触发、轮询或事件？
How does WebJob QueueTrigger trigger, polling or event?
public static void ProcessMessage([QueueTrigger("queue")] string message, TextWriter log)
{
//processing message
}
该方法将如何被触发。
WebJob 主机是否正在轮询存储队列。
或者存储队列引发新的消息事件，该主机订阅？
这个link有你的答案；
Polling algorithm
The SDK implements a random exponential back-off algorithm to reduce
the effect of idle-queue polling on storage transaction costs. When a
message is found, the SDK waits two seconds and then checks for
another message; when no message is found it waits about four seconds
before trying again. After subsequent failed attempts to get a queue
message, the wait time continues to increase until it reaches the
maximum wait time, which defaults to one minute. The maximum wait time
is configurable.
这也有帮助；
JobHostConfiguration config = new JobHostConfiguration();
config.Queues.MaxPollingInterval = TimeSpan.FromMinutes(1);
JobHost host = new JobHost(config);
host.RunAndBlock();
public static void ProcessMessage([QueueTrigger("queue")] string message, TextWriter log)
{
//processing message
}
该方法将如何被触发。
WebJob 主机是否正在轮询存储队列。 或者存储队列引发新的消息事件，该主机订阅？
这个link有你的答案；
Polling algorithm
The SDK implements a random exponential back-off algorithm to reduce the effect of idle-queue polling on storage transaction costs. When a message is found, the SDK waits two seconds and then checks for another message; when no message is found it waits about four seconds before trying again. After subsequent failed attempts to get a queue message, the wait time continues to increase until it reaches the maximum wait time, which defaults to one minute. The maximum wait time is configurable.
这也有帮助；
JobHostConfiguration config = new JobHostConfiguration();
config.Queues.MaxPollingInterval = TimeSpan.FromMinutes(1);
JobHost host = new JobHost(config);
host.RunAndBlock();