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dashboard: pass kinds= on the 4 unfiltered /api/dashboard/stream subscribers

Browse source 
Part 1 of the dashboard-event-stream-split epic: the server-side
kinds= allow-list already exists and flow.js already uses it
(hive-c0re/src/dashboard/state_snapshot.rs). tabs.js, builds.js,
core.js, and logs.js were the remaining 4 subscribers still taking
every wire kind unfiltered — pure subscription discipline, no new
endpoint needed, per the investigation on the tracking issue.

Each kinds= list is read directly off that page's own existing
MUTATION_HANDLERS/SSE_HANDLERS dispatch table (tabs.js also needs
sent, checked separately for the operator inbox) — a kind not in a
page's table was already a silent no-op today, so this only removes
wire/parse/dispatch-lookup cost for kinds a page never acted on, zero
behavior change.

Note for reviewers: the SharedWorker (stream-worker.js) multiplexes
by exact URL string, so pages that used to share one unfiltered
upstream connection when open simultaneously (e.g. dashboard.html +
builds.html in two tabs) will now each hold their own filtered
connection instead, since their kinds= differ. Each connection is
still a single cheap SSE stream carrying only what that page acts on
— net win over the shared-but-bloated connection this replaces.
This commit is contained in:
iris 2026-08-02 22:21:24 +02:00
commit f60e8a8470
4 changed files with 41 additions and 9 deletions
Download patch file Download diff file Expand all files Collapse all files

9
frontend/packages/dashboard/src/builds.js
View file

@ -794,7 +794,14 @@ async function init() {
await refreshState();
const es = openStream('/api/dashboard/stream');
// kinds= matches SSE_HANDLERS below verbatim — narrows this from all
// 17 wire kinds down to the 3 this page acts on. This page was one
// of 4 unfiltered `/api/dashboard/stream` subscribers before this
// (subscription discipline, part 1 of the dashboard-event-stream-
// split issue).
const es = openStream(
'/api/dashboard/stream?kinds=rebuild_queue_changed,meta_inputs_changed,meta_update_running',
);
if (es) {
es.onmessage = (e) => {
let ev;

10
frontend/packages/dashboard/src/core.js
View file

@ -509,7 +509,15 @@ async function init() {
await refreshState();
const es = openStream('/api/dashboard/stream');
// kinds= matches SSE_HANDLERS below verbatim — narrows this from all
// 17 wire kinds down to the 4 this page acts on. This page was one
// of 4 unfiltered `/api/dashboard/stream` subscribers before this
// (subscription discipline, part 1 of the dashboard-event-stream-
// split issue).
const es = openStream(
'/api/dashboard/stream?kinds=tombstones_changed,container_state_changed,' +
'capabilities_changed,tool_groups_changed',
);
if (es) {
es.onmessage = (e) => {
let ev;

6
frontend/packages/dashboard/src/logs.js
View file

@ -384,8 +384,12 @@ import '@hive/shared/hive-tab-strip.js';
loadContainerLists();
// Subscribe to the dashboard SSE stream for audit live-appends.
// kinds= narrows this from all 17 wire kinds down to the 1 this page
// acts on. This page was one of 4 unfiltered `/api/dashboard/stream`
// subscribers before this (subscription discipline, part 1 of the
// dashboard-event-stream-split issue).
{
const es = openStream('/api/dashboard/stream');
const es = openStream('/api/dashboard/stream?kinds=audit_entry_added');
if (es) {
es.onmessage = (e) => {
let ev;

25
frontend/packages/dashboard/src/tabs.js
View file

@ -314,12 +314,25 @@ window.marked = marked;
tool_groups_changed: applyToolGroupsChanged,
};
(function bindDashboardStream() {
// Route through the SharedWorker so all open hyperhive tabs share
// one upstream SSE connection — see docs/web-ui.md (SSE multiplexing
// paragraph) for the design + Firefox throttling motivation.
// `openStream` returns an EventSource-shaped facade with a graceful
// direct-EventSource fallback when SharedWorker isn't supported.
const es = openStream('/api/dashboard/stream');
// Route through the SharedWorker so all open hyperhive tabs on the
// SAME kinds= filter share one upstream SSE connection — see
// docs/web-ui/shape.md (SSE multiplexing paragraph) for the design
// + Firefox throttling motivation. `openStream` returns an
// EventSource-shaped facade with a graceful direct-EventSource
// fallback when SharedWorker isn't supported.
//
// kinds= matches MUTATION_HANDLERS below verbatim, plus `sent`
// (checked separately, just above, for the operator inbox) —
// narrows this from all 17 wire kinds down to the 13 this page
// actually acts on. This page was one of 4 unfiltered
// `/api/dashboard/stream` subscribers before this (subscription
// discipline, part 1 of the dashboard-event-stream-split issue).
const es = openStream(
'/api/dashboard/stream?kinds=sent,approval_added,approval_resolved,' +
'question_added,question_resolved,transient_set,transient_cleared,' +
'container_state_changed,container_removed,rebuild_queue_changed,' +
'schedules_changed,capabilities_changed,tool_groups_changed',
);
es.onmessage = (e) => {
let ev;
try { ev = JSON.parse(e.data); } catch { return; }