Callgents entries are adaptors to collect callgent to external systems or users.

There are three types of entries:

• Server Entry Responsible for converting requests into the encapsulated target system invocation or user chatting, and retrieving invocation response.
• Client Entry Responsible for receiving requests into callgent task queue, and responding back to caller when task has any progress.
• Event Entry Responsible for listening to events from the encapsulated target system or user, and notifying registered event observers on callgent.

When you want to connect your callgent to a new external system / user, you need to integrate them by adding a new entry.
You can add any number of entries to your callgent.

FIXME: list your callgents

Client entry to accept tasks from external system, and server entry to send tasks to external system / user.

You can also develop your own adaptor to the external system, if needed.