Fix https://github.com/matrix-org/matrix-public-archive/issues/46
Follow-up to https://github.com/matrix-org/matrix-public-archive/pull/71
Summary:
- Changes the "Jump to next activity in room" to actually continue you to the next 100 messages ahead. Previously, it only jumped you to the single next event in the room which meant a lot of backwards overlap each time.
- Jumping this direction will also start your scroll position at the top of the timeline to continue reading seamlessly `?continue=top`
- Adds "Jump to previous activity in room" to the top of the timeline to continue reading the previous part of the conversation.
[1]: There is a caveat with seamless here which is also commented on in the code:
> XXX: This is flawed in the fact that when we go `/messages?dir=b` it could backfill messages which will fill up the response before we perfectly connect and continue from the position they were jumping from before. When `/messages?dir=f` backfills, we won't have this problem anymore because any messages backfilled in the forwards direction would be picked up the same going backwards.
(need forwards fill MSC)
Split off from https://github.com/matrix-org/matrix-public-archive/pull/43
Listen to `process.on('uncaughtException', ...)` and handle the async errors ourselves so it no longer fails the child process.
And if the process does exit with status code 1 (error), we have those underlying errors serialized and shown.
OpenTelemetry tracing so we can see spans where the app is taking time.
For the user, we specifically show the spans for the external API HTTP requests
that are slow (so we know when the Matrix API is being slow).
Enable tracing:
- `npm run start -- --tracing`
- `npm run start-dev -- --tracing`
What does this PR change:
- Adds OpenTelemetry tracing with some of the automatic instrumentation (includes HTTP and express)
- We ignore traces for serving static assets (just noise)
- Adds `X-Trace-Id` to the response headers
- Adds `window.tracingSpansForRequest` which includes the external HTTP API requests made during the request
- Adds a fancy 504 timeout page that includes trace details and lists the slow HTTP requests
- Adds `jaegerTracesEndpoint` configuration to export tracing spans to Jaeger
- Related to, https://github.com/matrix-org/matrix-public-archive/issues/26
Eric Eastwood