Can a trigger make a call to Salesforce Apex callout method?

Hi Sanjana,

There is only one way to make a callout from a trigger and that is to run it asynchronously by using a future method.The reason for it is that the apex trigger restricts database transaction until the callout is completed and the time limit for this is up to 120 seconds.Future methods execute asynchronously i.e. one does not need to wait for a response. Hence, it can be used. Also remember that in order to make a callout from an apex trigger through future method, we need to enable a callout from future by passing an extra parameter “Callout=true”.

Hi,

Callout is a Asynchronous process where as Trigger is Dynamic / Synchronous.

That means it is not directly possible to do a webservice  callout from a trigger.

But using @Future annotation we can convert the Trigger into a Asynchrinous Class and we can use a Callout method.

See the links below for some more information ,

You can invoke callouts from triggers by encapsulating the callouts in @future methods

Hope this helps.