emit

Emit an event to all clients which have joined this room. The event is a string value which you are free to choose. It is possible, but not required, to send extra arguments with the event.

This function does not generate a change.

Using events enables a user to write code like this example of a ChatRoom in the Python language:

import asyncio
from thingsdb.util import event, Room
from thingsdb.client import Client

class ChatRoom(Room):

    @event('new-message')
    def on_new_message(self, msg):
        pass  # do something with the message

client = Client()

loop = asyncio.get_event_loop()
loop.run_until_complete(client.connect('localhost'))
loop.run_until_complete(client.authenticate('admin', 'pass'))

chat = ChatRoom(
    client,                     # ThingsDB Client() instance
    room='.chat.id();',         # The 'room' to join. This might be an Id or
                                # code to find the id.
    scope='//stuff')            # Collection Scope, defaults the the default
                                # scope of the client.

loop.run_forever()

Function

room.emit([deep [, flags]], event, ...)

Arguments

Argument	Type	Description
deep	int (optional)	Specify how deep the arguments must be send with the event. (defaults to the current deep value)
flags	int (optional)	Specify which flags to use; see return-flags
event	str (required)	Event name to emit. (name must have at least 1 and at most 255 characters)
…	any (optional)	Arguments send together with the event.

Return value

None

Example

This code shows an example using emit():

.chat = room();
.chat.emit('new-message', 'Hello Everyone!');

Return value in JSON format

null