fission-src/Documentation/docs-site/content/usage/trigger.en.md

title, draft, weight

title	draft	weight
Triggers	false	44

Create a HTTP Trigger

You can create a HTTP trigger with default method (GET) for a function:

$ fission ht create --url /hello --function hello
trigger '94cd5163-30dd-4fb2-ab3c-794052f70841' created

Create a Time Trigger

Time based triggers can be created with cron specifications:

$ fission tt create --name halfhourly --function hello --cron "0 30 * * *"
trigger 'halfhourly' created

Also a more friendly syntax such "every 1m" or "@hourly" can be used to create a time based trigger.

$ fission tt create --name minute --function hello --cron "@every 1m"
trigger 'minute' created

You can list time based triggers to inspect their associated function and cron specifications:

$ fission tt list
NAME       CRON       FUNCTION_NAME
halfhourly 0 30 * * * hello
minute     @every 1m  hello

Create a Message Queue Trigger

A message queue trigger invokes a function based on messages from an message queue. Currently, NATS and Azure Storage Queue are supported queues. (Kafka support is under development.)

$ fission mqt create --name hellomsg --function hello --mqtype nats-streaming --topic newfile --resptopic newfileresponse 
trigger 'hellomsg' created

You can list or update message queue triggers with fission mqt list, or fission mqt update.