v2.0.0

[2.0.0] - 2016.11.18

Features

• User presence has been added, enabling querying and subscription to who is
  online within a cluster
• Introduces the configuration option broadcastTimeout to config.yml to allow coalescing of
  broadcasts. This option can be used to improve broadcast message latency such
  as events, data-sync and presence
  For example, the perfomance of broadcasting 100 events to 1000 subscribers
  was improved by a factor of 20
• Adds client heartbeats, along with configuration optionheartbeatInterval in config.yml.
  If a connected client fails to send a heartbeat within this timeout, it will be
  considered to have disconnected #419
• Adds healthchecks – deepstream now responds to http GET requests to path
  /health-check on port 80 with code 200. This path can be configured with
  the healthCheckPath option in config.yml

Enhancements

• E2E tests refactored
• uWS is now compiled into the deepstream binary, eliminating reliability
  issues caused by dynamic linking

Breaking Changes

• Clients prior to v2.0.0 are no longer compatible
• Changed format of RPC request ACK messages to be more consistent with the
  rest of the specs
  #408
• We removed support for TCP and engine.io, providing huge perfomance gains by
  integrating tightly with native uWS
• Support for webRTC has been removed
• You can no longer set custom data transforms directly on deepstream