Apex can be executed synchronously or asynchronously.
Synchronous:
In a Synchronous call, the thread will wait until it completes its tasks before proceeding to next. In a Synchronous call, the code runs in single thread.
Example:
Trigger
Controller Extension
Custom Controller
Asynchronous:
In a Asynchronous call, the thread will not wait until it completes its tasks before proceeding to next. Instead it proceeds to next leaving it run in separate thread. In a Asynchronous call, the code runs in multiple threads which helps to do many tasks as background jobs.
Example:
Batch
@future Annotation
Cheers!!!
Synchronous:
In a Synchronous call, the thread will wait until it completes its tasks before proceeding to next. In a Synchronous call, the code runs in single thread.
Example:
Trigger
Controller Extension
Custom Controller
Asynchronous:
In a Asynchronous call, the thread will not wait until it completes its tasks before proceeding to next. Instead it proceeds to next leaving it run in separate thread. In a Asynchronous call, the code runs in multiple threads which helps to do many tasks as background jobs.
Example:
Batch
@future Annotation
Cheers!!!
ReplyDeletecan we call synchronous method from an asynchronous method? if yes, what are the issues we will get?
No issues in calling synchronous methods from asynchronous methods. They will run in the same thread.
DeleteYou cannot call Asynchronous methods from another asynchronous method. You will get an exception in this case.