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Aleksandar Novaković 3a5f4395e4 MF-171 - Extract websocket adapter as separate service (#188)
* Add websocket adapter

Add websocket adapter with basic logging and metrics middleware.
Add publish and subscribe to NATS subjects using websocket.
Add websocket handshake authorization over mainflux manager.

Signed-off-by: Aleksandar Novakovic <anovakovic01@gmail.com>

* Add test for websocket publish

Add test for websocket adapter's publish method. Add dependecy
injected logger to adapter. Remove unnecessary manager client
dependency from adapter.

Signed-off-by: Aleksandar Novakovic <anovakovic01@gmail.com>

* Add websocket library in dependencies

Add gorilla/websocket dependency in dep toml and lock file.
Add dependency in vendor dir.

Signed-off-by: Aleksandar Novakovic <anovakovic01@gmail.com>

* Add direct websocket connection

Add direct websocket connection. While messages are still beeing
published over NATS, they are not received over src.ws subject
in WebSocket adapter. Instead messages are sent directly over
websocket connection.

Add swagger file for WebSocket handshake endpoint. Update ReadMe
to reference new swagger file.

Signed-off-by: Aleksandar Novakovic <anovakovic01@gmail.com>

* Refactore websocket adapter code

Extract listen part from handshake. Update WebSocket adapter code.
Fix subscribe to NATS subject, so that it is independent from other
adapters. Remove message base64 encoding from response..

Signed-off-by: Aleksandar Novakovic <anovakovic01@gmail.com>

* Remove connection management from websocket adapter

Align notion of channel with NATS topic. Remove connection
management from adapter logic. Add log messages to adapter's
transport layer.

Signed-off-by: Aleksandar Novakovic <anovakovic01@gmail.com>

* Update NATS subjects and add subscriber interface

Update NATS subject name to channel.<channel_id>. Add and implement
subscriber interface. Implement subscriber interface in adapter.
Update readme to use new make <service_name> command. Refactor code.

Signed-off-by: Aleksandar Novakovic <anovakovic01@gmail.com>

* Add basic tests for broadcast and subscribe

Improve mock implementation of NATS pubsub. Add multiple basic test
cases for broadcast and subscribe methods. Add logging for subscribe.

Signed-off-by: Aleksandar Novakovic <anovakovic01@gmail.com>

* Add listen method test

Add listen method test and refactor existing tests. Refactor listen
method in adapter.

Signed-off-by: Aleksandar Novakovic <anovakovic01@gmail.com>

* Move broadcast method to message broker interface

Refactor broadcast method to receive send message callback and message
that needs to be sent. Update tests accordingly.

Signed-off-by: Aleksandar Novakovic <anovakovic01@gmail.com>

* Update pubsub API

Remove listen method from public API. Move listen call to subscribe
implementation. Update domain pubsub API in project root.

Signed-off-by: Aleksandar Novakovic <anovakovic01@gmail.com>

* Add connection error handlers to adapter API

Update publish and subscribe API to receive connection error handler.
Update tests accordingly. Handle NATS connection error.

Signed-off-by: Aleksandar Novakovic <anovakovic01@gmail.com>

* Update logs

Replace go-kit logger with custom mainflux logger. Update log messages
where needed..

Signed-off-by: Aleksandar Novakovic <anovakovic01@gmail.com>

* Refactor web socket adapter

Remove MessagePubSub interface. Remove unnecessary callbacks. Add
channels to web socket adapter implementation.

Signed-off-by: Aleksandar Novakovic <anovakovic01@gmail.com>

* Add API layer tests

Update existing tests and add API layer tests.

Signed-off-by: Aleksandar Novakovic <anovakovic01@gmail.com>

* Update docs with web socket related data

Signed-off-by: Aleksandar Novakovic <anovakovic01@gmail.com>

* Refactor web socket adapter

Update subscription struct, and refactor listen and broadcast methods.

Signed-off-by: Aleksandar Novakovic <anovakovic01@gmail.com>

* Add version and metrics endpoint to ws adapter

Update version to 0.2.0.

Signed-off-by: Aleksandar Novakovic <anovakovic01@gmail.com>

* Fix race condition bug in ws adapter test

Signed-off-by: Aleksandar Novakovic <anovakovic01@gmail.com>

* Rename listen to broadcast and broadcast to listen

Switch names between listen and broadcast methods. Move channel
structure to service.go.

Signed-off-by: Aleksandar Novakovic <anovakovic01@gmail.com>
2018-04-18 13:09:01 +02:00

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