Commit Graph

10 Commits

Author SHA1 Message Date
carla
94accfb69d
chanfitness: pass clock in to chaneventstore for testing 2020-09-08 13:47:15 +02:00
carla
7afd113b9f
chanfitness: add test context for better testing
As we add more elements to the chanfitness subsystem, we will require
more complex testing. The current tests are built around the inability
to mock subscriptions, which is remedied by addition of our own mock.
This context allows us to run the full store in a test, rather than
having to manually spin up the main goroutine. Mocking our subscriptions
is required so that we can block our subscribe updates on consumption,
using the real package provides us with no guarantee that the client
receives the update before shutdown, which produces test flakes.

This change also makes a move towards separating out the testing of our
event store from testing the underlying event logs to prepare for
further refactoring.
2020-09-08 13:47:14 +02:00
carla
3aa008ab04
multi: add interface for subscribe client so it can be mocked
The current implementation of subscribe is difficult to mock because
the queue that we send updates on in unexported, so you cannot create
a subscribe.Client object and then add your own updates. While it is
possible to run a subscribe server in tests, subscribe servers will
shutdown before dispatching their udpates to all clients, which can be
flakey (and is difficult to workaround). In this commit, we add a
subscription interface so that these testing struggles can be addressed
with a mock.
2020-09-08 13:47:13 +02:00
carla
25b0c40d05
chanfitness: fix line wrapping
Original PR was written with 4 spaces instead of 8, do a once off fix
here rather than fixing bit-by bit in the subsequent commits and
cluttering them for review.
2020-09-08 13:47:12 +02:00
carla
384c6aa1f1
chanfitness: save initial online event for channels with online peers
This commit adds an initial peer online event for channels
that have peers that are online when they are created. This
addresses a race between the peer coming online and an
existing channel being added to the event store; if the
peer comes online first, the existing channel will not have
its initial online event added.
2020-01-07 16:35:23 +02:00
carla
eebc23a8ad
chanfitness: set open time for channels with offline peers
This commit addresses a bug in the channel event store
where the opened time of a channel event log was not
set for peers that were offline on startup.

Previously, opened time was set to the time of the first
event in the event log. This worked for online peers,
because the eventlog was created with an initial online
event. However, offline peers had no inital event so had
no open time set.

This commit simplifies the creation of an event log by
removing the initial event and setting open time for all
event logs. This has the effect of potentially introducing
a gap between opened time for a log and the first peer
online event for peers with channels that exist at startup
if a peer takes time to reconnect. However, the cost of this
is less than the benefit of reducing the bug-prone custom
code path that was previously in place.
2019-12-17 17:36:28 +02:00
carla
4f9795e8ae
chanfitness: switch to query by channel outpoint
In this commit, the channelEventStore in the channel
fitness subsystem is changed to identify channels
by their outpoint rather than short channel id. This
change is made made becuase outpoints are the preferred
way to expose references over rpc, and easier to perform
queries within lnd.
2019-12-17 17:36:28 +02:00
carla
ec12463a95
chanfitness: define and export ErrChannelNotFound 2019-12-17 17:36:21 +02:00
carla
1e86589bee chanfitness: Add channel event store
This commit adds a channel event store to the channel fitness
package which is used to manage tracking of a node's channels.
It adds tracking for channel open/closed and peer online/offline
events for all channels that a node has open.

Events are consumed from channelNotifier and peerNotifier event
subscriptions. If either of these subscriptions is cancelled,
channel scoring stops, because both subscriptions are expected
to run until node shutdown.

Two functions are exposed to allow external callers to get uptime
information about a channel. GetLifespan returns the period over
which the channel has been monitored. GetUptime returns the channel's
uptime over a specified period. Callers can use these functions to
get the channel's remote peer uptime over its entire lifetime, or
a subset of that period.
2019-10-25 09:55:09 +02:00
carla
744876003d chanfitness: Add channel event log structure
This commit adds a chanfitness package which will be used to track
channel health and performance metrics. It adds a channel event
structure which will be used to track channel opens/closes and peer
uptime.

The eventLog implements an uptime function which calcualtes uptime
over a given period and a lifespan function which returns the time
when the log began monitoring the channel and, if the channel is
closed, the time when it stopped moitoring it.
2019-10-25 09:51:07 +02:00