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@dra2020/ot-clientsession
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2.0.34 • Public • Published

ot-clientsession

Library for managing client-side OT session.

The ClientSession object manages the overall interaction with the OT server. It maintains information on which user is authenticated (in the user property) as well as the state of the overall server interaction (connected, authorized).

A user registers callback listeners for certain events: 'status', 'join', 'state'. The callbacks are passed the ClientSession object and the ClientSessionState associated with the event.

Each separate OT session is represented by a ClientSessionState object. These have a sessionID and clientID that uniquely identifies them. The state property contains the current OT state. The clientEngine property is used for posting new local events.

In order to drive session activity, a client should call the tick method at regular intervals. For convenience, the speed property on the ClientSession object contains a SpeedManager object that provides an appropriate timeout interval for ticking the session state machine. This is a short interval when there is much activity and backs off as the system quiets in order to reduce overall CPU load as well as server pinging (although the server implements long-polling to prevent excessive traffic when there is little activity).

This library currently supports a single current session for tracking what to display in a single-page app. With minor changes, this could be changed to allow multiple current sessions. Right now the ClientSession object will only advance the state machine of the single current session, although any outstanding requests and their responses on non-current sessions will be processed correctly.

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npm i @dra2020/ot-clientsession

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2.0.34

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  • alecramsay
  • terrencecrowley
  • davebradlee